UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

Commission File Number 0-16439

Fair Isaac Corporation

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code:

612-758-5200

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

      Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes þ          No o

      Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.     o

      Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act).     Yes þ          No o

      Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes o          No þ

      Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.     Yes þ          No o

      Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.     Yes o          No þ

      As of March 31, 2005, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $1,870,759,068 based on the last transaction price as reported on the New York Stock Exchange on such date. This calculation does not reflect a determination that certain persons are affiliates of the registrant for any other purposes.

      The number of shares of common stock outstanding on November 30, 2005 was 64,484,661 (excluding 24,372,122 shares held by the Company as treasury stock).

      Items 10, 11, 12, 13 and 14 of Part III incorporate information by reference from the definitive proxy statement for the Annual Meeting of Stockholders to be held on February 6, 2006.

TABLE OF CONTENTS

FORWARD LOOKING STATEMENTS

      Statements contained in this Report that are not statements of historical fact should be considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995(the “Act”). In addition, certain statements in our future filings with the Securities and Exchange Commission (“SEC”), in press releases, and in oral and written statements made by us or with our approval that are not statements of historical fact constitute forward-looking statements within the meaning of the Act. Examples of forward-looking statements include, but are not limited to: (i) projections of revenue, income or loss, earnings or loss per share, the payment or nonpayment of dividends, capital structure and other statements concerning future financial performance; (ii) statements of our plans and objectives by our management or Board of Directors, including those relating to products or services; (iii) statements of assumptions underlying such statements; (iv) statements regarding business relationships with vendors, customers or collaborators; and (v) statements regarding products, their characteristics, performance, sales potential or effect in the hands of customers. Words such as “believes,” “anticipates,” “expects,” “intends,” “targeted,” “should,” “potential,” “goals,” “strategy,” and similar expressions are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Forward-looking statements involve risks and uncertainties that may cause actual results to differ materially from those in such statements. Factors that could cause actual results to differ from those discussed in the forward-looking statements include, but are not limited to, those described in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations-Risk Factors, below. The performance of our business and our securities may be adversely affected by these factors and by other factors common to other businesses and investments, or to the general economy. Forward-looking statements are qualified by some or all of these risk factors. Therefore, you should consider these risk factors with caution and form your own critical and independent conclusions about the likely effect of these risk factors on our future performance. Such forward-looking statements speak only as of the date on which statements are made, and we undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made to reflect the occurrence of unanticipated events or circumstances. Readers should carefully review the disclosures and the risk factors described in this and other documents we file from time to time with the SEC, including our reports on Forms 10-Q and 8-K to be filed by the Company in fiscal 2006.

PART I

GENERAL

      Fair Isaac Corporation (NYSE: FIC) (together with its consolidated subsidiaries, the “Company”, which may also be referred to in this report as “we,” “us,” “our,” and “Fair Isaac”) provides products and services that enable businesses to automate and improve decisions. Our predictive analytics and decision management systems power billions of customer decisions each year.

      We were founded in 1956 on the premise that data, used intelligently, can improve business decisions. Today, we help thousands of companies in over 60 countries use our Enterprise Decision Management technology to target and acquire customers more efficiently, increase customer value, reduce fraud and credit losses, lower operating expenses, and enter new markets more profitably. Most leading banks and credit card issuers rely on our solutions, as do insurers, retailers, telecommunications providers, healthcare organizations, pharmaceutical companies and government agencies. We also serve consumers through online services that enable people to purchase and understand their FICO® scores, the standard measure in the United States of credit risk, empowering them to manage their financial health.

      More information about us can be found on our principal website, www.fairisaac.com. We make our Annual Report on Form 10-K, our Quarterly Reports on Form 10-Q and our Current Reports on Form 8-K, as well as amendments to those reports, available free of charge through our website as soon as reasonably practicable after we electronically file them with the SEC. Information on our website is not part of this report.

PRODUCTS AND SERVICES

      We help businesses automate more of their mission-critical decisions and apply more intelligence to customer interactions and business processes. We call this approach Enterprise Decision Management (“EDM”). Most of our solutions address customer decisions, including customer targeting and acquisition, account origination, customer management, fraud, collections and recovery. We also help businesses improve non-customer decisions such as transaction and claims processing, and network integrity review. Our solutions enable users to make decisions that are more precise, consistent and agile, and that systematically advance business goals. This helps our clients to reduce the cost of doing business, increase revenues and profitability, reduce losses from risks and fraud, and increase customer loyalty.

Our Segments

      We categorize our products and services into the following four operating segments:

      Comparative segment revenues, operating income and related financial information for fiscal 2005, 2004 and 2003 are set forth in Note 17 to the accompanying consolidated financial statements.

Our Solutions

      Our solutions involve three fundamental disciplines:

      All of our solutions are designed to help businesses make decisions that are faster, more precise, more consistent and more agile, while reducing costs and reducing risks incurred in making decisions.

      We develop industry-tailored EDM applications, which we call Strategy Machine solutions, that apply analytics, data management and decision management software to specific business challenges and processes. These include credit offer prescreening, medical bill review, telecommunications fraud prevention and others. Our Strategy Machine solutions serve clients in the financial services, insurance, healthcare, retail, telecommunications and government sectors.

      The chief Strategy Machine offering for marketing is our Fair Isaac MarketSmart Decision System solution (“MarketSmart”). MarketSmart is a suite of products and capabilities designed to integrate all of the technology and analytic services needed to perform context-sensitive customer acquisition, cross-selling and retention programs. MarketSmart enables companies that offer multiple products and use multiple channels (companies such as large financial institutions, consumer branded goods companies, pharmaceutical companies, retail merchants and telecommunications service providers) to execute more efficient and profitable customer interactions. Services offered under the MarketSmart brand name include customer data integration (CDI) services; services that use transaction analytics to identify customer patterns and help clients target their marketing activities; services that enable real-time marketing through direct consumer interaction channels; campaign management and optimization services; interactive tools that automate the design, execution and collection of customer response data across multiple channels; and customer data collection, management and profiling services.

      A number of our marketing services are designed for specific industries, such as retail and pharmaceuticals. For example, our services for retailers include using analytics to help retailers identify and market to their store shoppers; analyzing transaction data to provide insights into store customer activity and compare it with

sales pattern activity across the marketplace; and analyzing a retailer’s purchase transaction data to help them understand buying patterns, sequences and contexts.

      We provide solutions that enable companies, typically financial services institutions such as banks, credit unions, finance companies and installment lenders, to automate and improve the processing of requests for credit from applicants. These solutions increase the speed and efficiency with which requests are handled, reduce losses and increase approval rates through analytics that assess applicant risk, and reduce the need for manual review by loan officers.

      Our solutions include LiquidCredit, a web-based service primarily focused on the credit decision and offered largely to mid-tier financial services institutions, e-commerce providers and telecommunications providers; and Capstone Decision Manager, a complete end-user software solution for application decisioning and processing. In fiscal 2005, we introduced new components for Capstone that can be used with multiple originations platforms and environments. These components are Capstone Decision Accelerator, which is a rules-based application based on our Fair Isaac Blaze Advisor system, and Capstone Intelligent Data Manager, which enables lenders to access data from several consumer and small business credit data sources. We also offer custom and consortium-based credit risk and application fraud models.

      Our customer management products and services enable businesses to automate and improve decisions on their existing customers. These solutions help businesses decide which customers to cross-sell, what additional products and services to offer, whether customer risk levels have increased or decreased, when and how much to change a customer’s credit line, what pricing adjustments to make in response to account performance or promotional goals, and how to treat delinquent and high-risk accounts.

      We provide customer management solutions for:

      Our fraud products improve our clients’ profitability by predicting the likelihood that a customer account is experiencing fraud. Our fraud products analyze customer transactions in real time and generate recommendations for immediate action, which is critical to stopping fraud and abuse. These applications can also detect some organized fraud schemes that are too complex and well-hidden to be identified by other methods.

      Our solutions are designed to detect and prevent a wide variety of fraud and risk types across multiple industries, including credit and debit payment card fraud; identity fraud; telecommunications subscription fraud, technical fraud and bad debt; healthcare fraud; Medicaid and Medicare fraud; and property and casualty insurance fraud, including workers’ compensation fraud. Fair Isaac fraud solutions protect merchants, financial institutions, insurance companies, telecommunications carriers, government agencies and employers from losses and damaged customer relationships caused by fraud.

      Our leading fraud detection solution is Falcon Fraud Manager, recognized as the leader in global payment card fraud detection. Falcon Fraud Manager’s neural network predictive models and patented profiling technology, both further described below in the “Technology” section, examine transaction, cardholder and merchant data to detect a wide range of payment card fraud quickly and accurately. Falcon analyzes payment card transactions in real time, assesses the risk of fraud, and takes the user-defined steps to prevent fraud while expediting legitimate transactions. Falcon Fraud Manager protects hundreds of millions of active accounts, and is used in approximately 65% of all credit card transactions worldwide.

      Fraud Predictor with Merchant Profiles is used in conjunction with Falcon Fraud Manager to improve fraud detection rates by analyzing merchant profile data. The merchant profiles include characteristics that reveal, for example, merchants that have a history of higher fraud volumes, and which purchase types and ticket sizes have most often been fraudulent at a particular merchant.

      Falcon ID enables lenders and telecommunications service providers to control identity fraud across the customer lifecycle. Falcon ID relies on multiple sources of data and complex statistical modeling techniques to identify activity that is at high risk of stemming from identity theft. It also provides business rules management that companies can use to identify and resolve cases that appear to involve identity theft.

      In fiscal 2005, we introduced an important addition to our fraud line, the Falcon One system. This system enables businesses to improve their protection across channels and business lines, by sharing detection capabilities, case management and analytics. The Falcon One system offers greater protection against multiple types of fraud than do the “point solutions” available today. It also provides a unified infrastructure that will bridge our existing fraud solutions, such as Falcon Fraud Manager and Falcon ID, as well as custom solutions we develop for our clients for other types of fraud.

      We also market solutions specifically designed to help telecommunications service providers reduce fraud losses. Our Risk Analytics for Telecom and Fraud Analytics for Telecom solutions help service providers mitigate early-life and ongoing bad debt, in addition to reducing complex types of fraud such as subscription fraud, technical fraud, internal fraud, dealer/agent fraud, calling card fraud, cloning, and clip-on fraud. Two new solutions in this area in fiscal 2005 included Revenue Assurance Analytics, which predict revenue leakage in the switch data collection, data mediation and billing/rating system phases, and Network Assurance Analytics, which predicts problems in a telecommunications network by detecting intrusion, abuse or network integrity compromises.

      In fiscal 2004, Fair Isaac acquired London Bridge Software Holdings plc (“London Bridge”), which provides a number of solutions for collections and debt recovery. These solutions are used not just in consumer

credit but also in insurance, retail, healthcare, utilities and telecommunications, as well as by government agencies.

      Our leading solutions in this area are the Debt Manager solution and Recovery Management System (“RMS”). The Debt Manager solution automates the full cycle of collections and recovery, including early collections, late collections, asset disposal, agency placement, recovery, litigation, bankruptcy, asset management and residual balance recovery. RMS is focused on the later phases of distressed debt management, including bankruptcy and agency management. Debt Manager and RMS customers can access partner services such as collection agencies and attorneys via the BridgeLink network which provides web-based access to and from thousands of third-party collections and recovery service providers.

      Other solutions for collections and recovery, which we categorized last year with our account management solutions, include the PlacementsPlus service, an account placement optimization and management system; the Placement Optimizer service, which uses artificial intelligence-based analytics used to identify the agency that is likely to collect the most for each account; and custom collection and recovery models implemented in an ASP environment. Those analytic-based solutions can also be delivered via the BridgeLink network.

      As a result of our acquisition of London Bridge in fiscal 2004, Fair Isaac now provides end-to-end mortgage lending solutions that mortgage lenders can use to improve their loan marketing, sourcing, originations, servicing and default management. These solutions include the Diamond loan origination solution, an internet-based solution that streamlines the complete mortgage process; TMO (The Mortgage Originator), a loan origination system; the LSAMS loan servicing and account management system for the servicing of mortgage and consumer loans; FORTRACS software for default management; and the LenStar default management communication network for attorney referrals. This category also includes TCL (The Construction Lender), which enables lenders to manage the entire construction lending process. All of the mortgage solutions are integrated with Fair Isaac’s BridgeLink vendor management network, which provides real-time connectivity to a broad range of third-party service providers, business partners and external systems involved in the complex process of mortgage lending.

      We provide software solutions and services that automate the review and repricing of medical bills for workers’ compensation and automobile medical injuries. Using these solutions, property and casualty insurers can automatically review and reprice a significant percentage of medical bills without human intervention. This allows for greater consistency and accuracy, which are important factors for regulatory compliance.

      Our principal solutions in this area are:

      We also provide fraud solutions for different segments of the insurance healthcare market. Our principal solutions in this area are:

      Additionally, we serve the insurance claims management market through our MIRA Claims Advisor product which uses predictive models to forecast appropriate claims reserves based on individual claim data. We also provide services that help healthcare payers reduce claims leakage and detect fraud, and that help hospitals determine payment strategies for patients during the admission process.

      Through our myFICO division, we provide solutions based on our analytics to consumers, sold directly by us or through distribution partners. In its nearly five years of existence, more that 12 million scores have been delivered to consumers. Consumers can use the myFICO.com website to purchase their FICO scores, the credit reports underlying the scores, explanations of the factors affecting their scores, and customized advice on how to improve their scores. Customers can also use the myFICO service to simulate how taking specific actions would affect their FICO score. The myFICO.com website is the only source for consumers to obtain their FICO scores and credit reports from all three of the major U.S. credit reporting agencies. In December 2004, myFICO started offering Score Watch^tm subscriptions, which deliver alerts via email and SMS or text messages to consumers when their scores or balances change. The myFICO products and subscription offerings are available online at www.myfico.com, through two of the credit reporting agencies involved — Equifax Inc. (“Equifax”) and TransUnion Corporation (“TransUnion”) — and through lenders, financial portals and numerous other partners.

      We develop the world’s leading scores based on third-party data. Our FICO scores are used in most U.S. credit decisions, by most of the major credit card organizations as well as by mortgage and auto loan originators. These scores provide a consistent and objective measure of an individual’s credit risk. Credit grantors use the FICO scores to prescreen solicitation candidates, to evaluate applicants for new credit and to review existing accounts. The FICO scores are calculated based on proprietary scoring models. The scores produced by these models are available through each of the three major credit reporting agencies in the United States: TransUnion, Experian Information Solutions, Inc. (“Experian”), and Equifax. Users generally pay the credit reporting agencies scoring fees based on usage, and the credit reporting agencies share these fees with us.

      The most powerful of our U.S. credit bureau products, NextGen FICO risk scores, are also available at all three major credit-reporting agencies. NextGen FICO risk scores provide a more refined risk assessment than the classic FICO risk scores.

      In fiscal 2004, we released two new scoring products, both based on data unavailable through the three major U.S. credit reporting agencies. The FICO Expansion score provides scores on U.S. consumers who do not have traditional FICO scores, generally because they do not have any credit accounts being reported to the credit reporting agencies. The score analyzes multiple sources of non-traditional credit data accessed by our subsidiary Fair Isaac Network, Inc., and the score and associated reports are provided to lenders through a subsidiary called Fair Isaac Credit Services, Inc. We also released the Fair Isaac Qualify score, which helps marketers find prospects on their promotional mailing lists who are most likely to respond and to be approved for credit. This score is based on commercially available sources of marketing data, and is delivered by Fair Isaac.

      Another major addition to our scoring solutions in fiscal 2004 was the Global FICO score. This score extends our thorough analysis of multiple-lender credit data to countries around the world that have

established credit bureaus. These scores help lenders assess the risk of prospects, applicants and borrowers, and are particularly valuable in markets where there is not a dominant credit bureau risk score available.

      In addition to the scores noted above, we have developed marketing and bankruptcy scores offered through the U.S. credit reporting agencies; an application fraud and a bankruptcy score available in Canada; consumer risk scores offered through credit reporting agencies in Canada, South Africa and the U.K.; commercial credit scores delivered by both U.S. and U.K. credit reporting agencies; and a bankruptcy scoring service offered through ISC, a subsidiary of Visa USA.

      We have also developed scoring systems for insurance underwriters and marketers. Such systems use the same underlying statistical technology as our FICO risk scores, but are designed to predict applicant or policyholder insurance loss risk for automobile or homeowners’ coverage. Our insurance scores are available in the U.S. from TransUnion, Experian, Equifax and ChoicePoint, Inc., and in Canada from Equifax. In fiscal 2005, we introduced a new kind of insurance score called the Property PredictR^tm score, which analyzes property inspection database data from an insurance services provider, Millennium Information Services, Inc., to calculate the loss risk of a property.

      We also provide credit bureau scoring services and related consulting directly to users in financial services through two U.S.-based services: PreScore Service for prescreening solicitation candidates, and ScoreNet Service for customer account management.

      We provide a variety of custom offerings, business solution and technical consulting services, systems integration services, and data management services to markets worldwide. The focus is on leveraging our industry experience and technical expertise, typically on a custom basis, to help clients address unique business challenges, to support the usage of our Strategy Machine solutions and our analytic software tools, and to create new sales opportunities for our other offerings. This group also performs consultative selling, developing customized solution sets combining various products and capabilities to meet unique client or industry opportunities. These services are generally offered on an hourly or fixed fee basis.

      In fiscal 2005, we acquired Braun Consulting, Inc. (“Braun”), a marketing strategy and technology consulting firm based in Chicago with offices in Boston and New York. As a result of this acquisition, we now offer a wider range of consulting services addressing business strategy, operational excellence and marketing practice. This acquisition also increased our presence in the healthcare, retail and pharmaceutical industries.

      Our services include:

      We provide end-user software products that businesses use to build their own tailored EDM applications. In contrast to our packaged Strategy Machine solutions developed for specific industry applications, our analytic software tools perform a single function — such as management of the rules and policies an enterprise uses to make decisions — that can be easily integrated within a variety of specialized industry applications.

      We use these tools as common software components for our own EDM applications, described above in the Strategy Machine Solutions section. We also partner with third-party providers within given industry markets and with major software companies to imbed our tools within existing applications. These tools are sold as licensed software.

      The principal products offered are software tools for:

COMPETITION

      The market for our advanced solutions is intensely competitive and is constantly changing. Our competitors vary in size and in the scope of the products and services they offer. We encounter competition from a number of sources, including:

      We believe that none of our competitors offers the same mix of products as we do, or has the same expertise in predictive analytics and their integration with decision management software. However, certain competitors may have larger shares of particular geographic or product markets.

Strategy Machine Solutions

      The competition for our Strategy Machine solutions varies by both application and industry.

      In the customer acquisition market, we compete with Acxiom, Experian, SAS, SPSS, Epsilon, Harte-Hanks, and Siebel, among others. We also compete with traditional advertising agencies and companies’ own internal information technology and analytics departments.

      In the origination market, we compete with CGI/ AMS, Experian, Provenir, Lightbridge, Appro Systems, and First American Credit Management Solutions (CMSI), among others.

      In the customer management market, we compete with CGI/ AMS, Experian, Insurance Services Organization, ChoicePoint, Lightbridge and Oracle, among others.

      In the fraud solutions market, we mainly compete with SearchSpace, ID Analytics, Experian, Retail Decisions plc and ACI Worldwide, a division of Transaction Systems Architects, in the financial services market; ECTel, Hewlett-Packard, Cerebrus Solutions and Neural Technologies in the telecommunications

market; IBM and ViPS in the healthcare segment; and SAS, Infoglide Software Corporation, NetMap Analytics and Magnify in the property and casualty and workers’ compensation insurance market.

      In the collections and recovery solutions market, we mainly compete with CGI/ AMS, Columbia Ultimate, Ontario Systems, Austin Logistics, Talgentra, Attentiv Systems and various boutique firms for software and ASP servicing; and in-house scoring and computer science departments along with the three major U.S. credit reporting agencies and Experian-Scorex for scoring and optimization projects.

      In the mortgage lending solutions market, we mainly compete with Fidelity, Framework, Fiserv, First American, Gallagher and GHR. In the construction lending market our main competitors are Harland and DataSelect.

      In the insurance and healthcare solutions market, we mainly compete with Ingenix, First Health, CorVel Corporation, SAS, ISO, IBM, Mitchell International, Inc., and Concentra Managed Care.

      For our direct-to-consumer services that deliver credit scores, credit reports and consumer credit education services, we compete with our credit reporting agency partners and their affiliated companies, as well as with Trilegiant, InterSections and others.

Scoring Solutions

      In this segment, we compete with both outside suppliers and in-house analytics and computer systems departments for scoring business. Major competitors among outside suppliers of scoring models include the three major U.S. credit reporting agencies, which are also our partners in offering our scoring solutions; Experian-Scorex and other credit reporting agencies outside the United States; and other data providers like LexisNexis and ChoicePoint.

Professional Services

      We compete with a variety of organizations that offer consulting services, primarily specialty technology and consulting firms. In addition, a client may use its own resources rather than engage an outside firm for these services. Our competitors include information technology product and services vendors, management and strategy consulting firms, smaller specialized information technology consulting firms and analytical services firms.

Analytic Software Tools

      Our primary competitors in this segment include SAS, SPSS, Angoss, ILOG, Computer Associates International, and Pegasystems.

Competitive Factors

      We believe the principal competitive factors affecting our markets include: technical performance; access to unique proprietary databases; availability in ASP format; product attributes like adaptability, scalability, interoperability, functionality and ease-of-use; product price; customer service and support; the effectiveness of sales and marketing efforts; existing market penetration; and our reputation. Although we believe our products and services compete favorably with respect to these factors, we may not be able to maintain our competitive position against current and future competitors.

MARKETS AND CUSTOMERS

      Our products and services serve clients in multiple industries, including financial services, insurance, retail, telecommunications, healthcare, pharmaceuticals and governmental agencies. During fiscal 2005, end users of our products included more than 85 of the 100 largest banks in the United States; approximately two-thirds of the largest 100 banks in the world; and more than 90 of the 100 largest U.S. credit card issuers. Our clients also include more than 400 insurers and healthcare payors, more than 100 retailers and general merchandisers, more than 80 government or public agencies, more than 100 telecommunications carriers, and

many leading healthcare and pharmaceuticals companies. Nine of the top 10 companies on the 2005 Fortune 500 list use Fair Isaac’s solutions.

      In addition, our consumer services are marketed to an estimated 190 million U.S. consumers whose credit relationships are reported to the three major credit reporting agencies.

      In the United States, we market our products and services primarily through our own direct sales organization. Sales groups are based in our headquarters and in field offices strategically located both in and outside the United States. We also market our products through indirect channels, including alliance partners and other resellers.

      During fiscal 2005, 2004 and 2003, revenues generated from our agreements with Equifax, TransUnion and Experian collectively accounted for 20%, 20% and 19% of our total revenues, respectively.

      Outside the United States, we market our products and services primarily through our subsidiary sales organizations. Our subsidiaries license and support our products in their local countries as well as within other foreign countries where we do not operate through a direct sales subsidiary. We also market our products through resellers and independent distributors in international territories not covered by our subsidiaries’ direct sales organizations.

      Our largest market segments outside the United States are the United Kingdom and Canada. Mexico, South Africa, a number of countries in South America and almost all of the Western European countries are represented in our user base. We have delivered products to users in over 60 countries.

      Revenues from international customers, including end users and resellers, amounted to 25%, 22% and 21% of our total revenues in fiscal 2005, 2004 and 2003, respectively. See Note 17 to the accompanying consolidated financial statements for a summary of our operating segments and geographic information.

TECHNOLOGY

      We specialize in analytics, software and data management technologies that analyze data and drive business processes and decision strategies. We maintain active research in a number of fields for the purposes of deriving greater insight and predictive value from data, making various forms of data more usable and valuable to the model-building process, and automating and applying analytics to the various processes involved in making high-volume decisions in real time.

      Because of our pioneering work in credit scoring and fraud detection, we are widely recognized as the leader in predictive analytics. In addition, our Fair Isaac Blaze Advisor software is consistently ranked as a leader in rules management systems. In all our work, we believe that our tools and processes are among the very best commercially available, and that we are uniquely able to integrate advanced analytic, software and data technologies into mission-critical business solutions that offer superior returns on investment.

Principal Areas of Expertise

      Predictive Modeling. Predictive modeling identifies and mathematically represents underlying relationships in historical data in order to explain the data and make predictions or classifications about future events. Our models summarize large quantities of data to amplify its value. Predictive models typically analyze current and historical data on individuals to produce easily understood metrics such as scores. These scores rank-order individuals by likely future performance, e.g., their likelihood of making credit payments on time, or of responding to a particular offer for services. We also include in this category models that detect the likelihood of a transaction being fraudulent. Our predictive models are frequently operationalized in mission-critical transactional systems and drive decisions and actions in near real time. A number of analytic methodologies underlie our products in this area. These include proprietary applications of both linear and non-linear mathematical programming algorithms, in which one objective is optimized within a set of constraints, and advanced “neural” systems, which learn complex patterns from large data sets to predict the probability that a new individual will exhibit certain behaviors of business interest. We also apply various related statistical techniques for analysis and pattern detection within large datasets. For example, we recently

developed a proprietary technology we call Pair-wise Co-occurrence Consistency or “Peacock,” which we use to analyze large-scale purchase transaction data to reveal product relationships, purchase patterns and sequences.

      Decision Analysis and Optimization. Decision analysis refers to the broad quantitative field that deals with modeling, analyzing and optimizing decisions made by individuals, groups and organizations. Whereas predictive models analyze multiple aspects of individual behavior to forecast future behavior, decision analysis analyzes multiple aspects of a given decision to identify the most effective action to take to reach a desired result. We have developed an integrated approach to decision analysis that incorporates the development of a decision model that mathematically maps the entire decision structure; proprietary optimization technology that identifies the most effective strategies, given both the performance objective and constraints; the development of designed testing required for active, continuous learning; and the robust extrapolation of an optimized strategy to a wider set of scenarios than historically encountered. This technology is behind our Strategy Science solutions.

      Transaction Profiling. Transaction profiling is a patent-protected technique used to extract meaningful information and reduce the complexity of transaction data used in modeling. Many of our products operate using transactional data, such as credit card purchase transactions, or other types of data that change over time. In its raw form, this data is very difficult to use in predictive models for several reasons: First, an isolated transaction contains very little information about the behavior of the individual that generated the transaction. In addition, transaction patterns change rapidly over time. Finally, this type of data can often be highly complex. To overcome these issues, we have developed a set of proprietary techniques that transform raw transactional data into a mathematical representation that reveals latent information, and which make the data more usable by predictive models. This profiling technology accumulates data across multiple transactions of many types to create and update profiles of transaction patterns. These profiles enable our neural network models to efficiently and effectively make accurate assessments of, for example, fraud risk and credit risk within real-time transaction streams.

      Customer Data Integration. Decisions made on customers or prospects can benefit from data stored in multiple sources, both inside and outside the enterprise. We have focused on developing data integration processes that are able to assemble and integrate those disparate data sources into a unified view of the customer or household, through the application of persistent keying technology.

      Decision Management Software. In order to make a decision strategy operational, the various steps and rules need to be programmed or exported into the business’ software infrastructure, where it can communicate with front-end, customer-facing systems and back-end systems such as billing systems. We have developed software systems, sometimes known as decision engines and business rules management systems, that perform the necessary functions to execute a decision strategy. Our software includes very efficient programs for these functions, facilitating, for example, business user definition of extremely complex decision strategies using graphic user interfaces; simultaneous testing of hundreds of decision strategies in “champion/challenger” (test/control) mode; high-volume processing and analysis of transactions in real time; integration of multiple data sources; and execution of predictive models for improved behavior forecasts and finer segmentation.

Research and Development Activities

      Our research and development expenses were $81.3 million, $71.1 million, and $67.6 million in fiscal 2005, 2004 and 2003, respectively. We believe that our future success depends on our ability to continually maintain and improve our core technologies, enhance our existing products, and develop new products and technologies that meet an expanding range of markets and customer requirements. In the development of new products and enhancements to existing products, we use our own development tools extensively.

      We have traditionally relied primarily on the internal development of our products. Based on timing and cost considerations, however, we have acquired, and in the future may consider acquiring, technology or products from third parties.

PRODUCT PROTECTION AND TRADEMARKS

      We rely on a combination of patent, copyright, trademark and trade secret laws and confidentiality agreements and procedures to protect our proprietary rights.

      We retain the title to and protect the suite of models and software used to develop scoring models as a trade secret. We also restrict access to our source code and limit access to and distribution of our software, documentation and other proprietary information. We have generally relied upon the laws protecting trade secrets and upon contractual non-disclosure safeguards and restrictions on transferability to protect our software and proprietary interests in our product and service methodology and know-how. Our confidentiality procedures include invention assignment and proprietary information agreements with our employees and independent contractors, and nondisclosure agreements with our distributors, strategic partners and customers. We also claim copyright protection for certain proprietary software and documentation.

      We have patents on many of our technologies and have patent applications pending on other technologies. The patents we hold may not be upheld as valid and may not prevent the development of competitive products. In addition, patents may never be issued on our pending patent applications or on any future applications that we may submit.

      Despite our precautions, it may be possible for competitors or users to copy or reproduce aspects of our software or to obtain information that we regard as trade secrets. In addition, the laws of some foreign countries do not protect proprietary rights to the same extent as do the laws of the United States. Patents and other protections for our intellectual property are important, but we believe our success and growth will depend principally on such factors as the knowledge, ability, experience and creative skills of our personnel, new products, frequent product enhancements, and name recognition.

      We have developed technologies for research projects conducted under agreements with various United States government agencies or their subcontractors. Although we have acquired commercial rights to these technologies, the United States government typically retains ownership of intellectual property rights and licenses in the technologies that we develop under these contracts. In some cases, the United States government can terminate our rights to these technologies if we fail to commercialize them on a timely basis. In addition, under United States government contracts, the government may make the results of our research public, which could limit our competitive advantage with respect to future products based on funded research.

      We have used, registered and/or applied to register certain trademarks and service marks for our technologies, products and services.

      300-850^tm score, A3® service, ActiView®service, BridgeLink^tm network, Capstone® Decision Manager, Capstone® Decision Manager, CompAdvisor®medical bill review software, ContactBuilder^tm service, Context Vectors^tm technology, CreditDesk® origination and underwriting software, Debt Manager^tm solution, Diamond^tmsoftware system, Enterprise Decision Manager® system, Fair Isaac®, Fair Isaac Korea®, Fair Isaac MarketSmart CDISM service, Fair Isaac MarketSmart Decision System® solution, Fair Isaac® Qualify^tm score, Fair Isaac SmartAdvisor^tm medical bill review software, Fair Isaac SmartLink® customer data integration service, Falcon^tmExpress, Falcon^tm Fraud Manager, Falcon^tm ID solution, Falcon One^tm system, FastPanel^tm diagnostics, FICO®Expansion^tm score, FICO® score, FICO — the score lenders use^tm (tagline), FICO — the score to know^tm (tagline), FICO.org^tm service, Global FICO® score, Identity Theft Security^tm service, It’s just a smarter way to do business® (tagline), LenStar^tm service, LiquidCredit® service, LSAMS^tm software system, MIRA^tm Claims Advisor for Reserving, myFICO® service, NextGen FICO® scores, OfferPoint^tm transaction analytics solution, Payment Optimizer® solution, PlacementsPlus® service, PrecisionView^tm transaction analytics solution, PreScore® Service, Recovery Management System^tm solution, RMS^tm solution, RMS NG^tmsolution, RoamEx® roamer data exchanger, ScoreNet®Service, ScoreWare® software, See how lenders see youSM (tagline), Small Business Scoring ServiceSM (or SBSSSM) solution, Strategy Machine® solution, StrategyWare® decision engine, TCL^tm software system, TelAdaptive® account management service, TRIAD^tm adaptive control system, UniScoreSM service, Vectus® software, VeriComp® Fraud Manager, and Vista® account management risk score service are trademarks or registered trademarks of Fair Isaac Corporation, in the United States and/or in other countries.

PERSONNEL

      As of September 30, 2005, we employed 2,796 persons worldwide. Of these, 418 full-time employees were located in our Minneapolis and Arden Hills, Minnesota offices, 375 full-time employees were located in our San Rafael, California office, 396 full-time employees were located in our San Diego, California office, and 262 full-time employees were located in our United Kingdom-based offices. None of our employees is covered by a collective bargaining agreement and no work stoppages have been experienced.

      Information regarding our officers is included in “Executive Officers of the Registrant” at the end of Part I of this report.

      Our properties consist primarily of leased office facilities for sales, data processing, research and development, consulting and administrative personnel. Our principal office is located in Minneapolis, Minnesota.

      Our leased properties include:

      See Note 18 to the accompanying consolidated financial statements for information regarding our obligations under leases. We believe that suitable additional space will be available to accommodate future needs.

      We are subject to various legal proceedings in the ordinary course of business, none of which is required to be disclosed under this Item 3.

      Not applicable.

EXECUTIVE OFFICERS OF THE REGISTRANT

      Our executive officers were as follows:

PART II

Market Information

      Our common stock trades on the New York Stock Exchange under the symbol: FIC. According to records of our transfer agent, at September 30, 2005, we had 533 shareholders of record of our common stock.

      The following table shows the high and low closing prices for our stock, as listed on the New York Stock Exchange and adjusted to give retroactive effect to the three-for-two stock split effected in March 2004, for each quarter in the last two fiscal years:

Dividends

      We paid quarterly dividends of two cents per share, or eight cents per year, during each of fiscal 2005, 2004 and 2003. Our dividend rate is set by the Board of Directors on a quarterly basis taking into account a variety of factors, including among others, our operating results and cash flows, general economic and industry conditions, our obligations, changes in applicable tax laws and other factors deemed relevant by the Board. Although we expect to continue to pay dividends at the current rate, our dividend rate is subject to change from time to time based on the Board’s business judgment with respect to these and other relevant factors. The share and per share amounts within this report have been adjusted to reflect the three-for-two stock split effected in March 2004.

Issuer Purchases of Equity Securities (1)

      We acquired Nykamp Consulting Group, Inc. (“Nykamp”) in December 2001, HNC Software Inc. (“HNC”) in August 2002, Spectrum Managed Care, Inc. (“Spectrum”) in December 2002, NAREX Inc. (“NAREX”) in July 2003, Diversified HealthCare Services, Inc. (“Diversified HealthCare Services”) in September 2003, Seurat Company (“Seurat”) in October 2003, London Bridge Software Holdings plc (“London Bridge”) in May 2004, Braun in November 2004 and RulesPower in September 2005. Results of operations from these acquisitions are included prospectively from the date of each acquisition. As a result of these acquisitions, the comparability of the data below is impacted.

      In February 2004, April 2002 and May 2001, our Board of Directors authorized three-for-two stock splits, each effected in the form of a stock dividend, with cash paid in lieu of fractional shares. As a result of the three stock splits, stockholders of record at the close of business on February 18, 2004, May 15, 2002 and May 14, 2001, respectively, received an additional share of Fair Isaac stock for every two shares owned, which was distributed on March 10, 2004, June 5, 2002 and June 4, 2001, respectively. All share and earnings per share amounts have been adjusted to reflect these three stock splits.

RESULTS OF OPERATIONS

Overview

      We are a leader in Enterprise Decision Management (“EDM”) solutions that enable businesses to automate and improve their decisions. Our predictive modeling, decision analysis, intelligence management, decision management systems and consulting services power billions of customer decisions each year. We help companies acquire customers more efficiently, increase customer value, reduce fraud and credit losses, lower operating expenses and enter new markets more profitably. Most leading banks and credit card issuers rely on our solutions, as do many insurers, retailers, telecommunications providers, healthcare organizations and government agencies. We also serve consumers through online services that enable people to purchase and understand their FICO scores, the standard measure of credit risk, to manage their financial health.

      Most of our revenues are derived from the sale of products and services within the consumer credit, financial services and insurance industries, and during the year ended September 30, 2005, 75% of our revenues were derived from within these industries. A significant portion of our remaining revenues is derived from the telecommunications, healthcare and retail industries, as well as the government sector. Our clients utilize our products and services to facilitate a variety of business processes, including customer marketing and acquisition, account origination, credit and underwriting risk management, fraud loss prevention and control, and client account and policyholder management. A significant portion of our revenues is derived from transactional or unit-based software license fees, annual license fees under long-term software license arrangements, transactional fees derived under scoring, network service or internal hosted software arrangements, and annual software maintenance fees. The recurrence of these revenues is, to a significant degree, dependent upon our clients’ continued usage of our products and services in their business activities. The more significant activities underlying the use of our products in these areas include: credit and debit card usage or active account levels; lending acquisition, origination and customer management activity; workers’ compensation and automobile medical injury insurance claims; and wireless and wireline calls and subscriber levels. Approximately 77% of our revenues during fiscal 2005 were derived from arrangements with transactional or unit-based pricing. We also derive revenues from other sources which generally do not recur and include, but are not limited to, perpetual or time-based licenses with upfront payment terms, non-recurring professional service arrangements and gain-share arrangements where revenue is derived based on percentages of client revenue growth or cost reductions attributable to our products.

      Within a number of our sectors there has been a sizable amount of industry consolidation. In addition, many of our sectors are experiencing increased levels of competition. As a result of these factors, we believe that future revenues in particular sectors may decline. However, due to the long-term customer arrangements we have with many of our customers, the near term impact of these declines may be more limited in certain sectors.

      One measure used by management as an indicator of our business performance is the volume of new bookings achieved. We define a “new booking” as estimated future contractual revenues, including agreements with perpetual, multi-year and annual terms. New bookings values may include: (i) estimates of variable fee components such as hours to be incurred under new professional services arrangements and customer account or transaction activity for agreements with transactional-based fee arrangements, (ii) additional or expanded business from renewals of contracts, and (iii) to a lesser extent, previous customers that have attrited and been re-sold only as a result of a significant sales effort. In the fourth quarter of fiscal 2005, we achieved new bookings of $109.7 million, including four deals with bookings values of $3.0 million or more. In comparison, new bookings in the fourth quarter of fiscal 2004 were $110.6 million, including eight deals with bookings values of $3.0 million or more.

      Management regards the volume of new bookings achieved, among other factors, as an important indicator of future revenues, but they are not comparable to, nor should they be substituted for, an analysis of our revenues, and they are subject to a number of risks and uncertainties, including those described in

Management’s Discussion and Analysis of Financial Condition and Results of Operations — Risk Factors, below, concerning timing and contingencies affecting product delivery and performance. Although many of our contracts have fixed non-cancelable terms, some of our contracts are terminable by the client on short notice or without notice. Accordingly, we do not believe it is appropriate to characterize all of our new bookings as backlog that will generate future revenue.

      Our revenues derived from clients outside the United States continue to grow, and may in the future grow more rapidly than our revenues from domestic clients. International revenues totaled $201.5 million, $152.5 million and $133.6 million in fiscal 2005, 2004 and 2003, respectively, representing 25%, 22% and 21% of total consolidated revenues in each of these years. In addition to clients acquired via our acquisitions, we believe that our international growth is a product of successful relationships with third parties that assist in international sales efforts and our own increased sales focus internationally, and we expect that the percentage of our revenues derived from international clients will increase in the future.

      We acquired Spectrum in December 2002, NAREX in July 2003, Diversified HealthCare Services in September 2003, Seurat in October 2003, London Bridge in May 2004, Braun in November 2004 and RulesPower in September 2005. Results of operations from these acquisitions are included prospectively from the date of acquisition. As a result of these acquisitions, our financial results during the year ended September 30, 2005, are not directly comparable to those during the years ended September 30, 2004 and 2003, or other years prior to any of these acquisitions.

      Our reportable segments are: Strategy Machine Solutions, Scoring Solutions, Professional Services and Analytic Software Tools. Although we sell solutions and services into a large number of end user product and industry markets, our reportable business segments reflect the primary method in which management organizes and evaluates internal financial information to make operating decisions and assess performance. Comparative segment revenues, operating income, and related financial information for the years ended September 30, 2005, 2004 and 2003 are set forth in Note 17 to the accompanying consolidated financial statements.

Revenues

      The following tables set forth certain summary information on a segment basis related to our revenues for the fiscal years indicated.

      The increase in total revenues from fiscal 2004 to fiscal 2005 included a $67.4 million increase in revenues that resulted from our acquisitions in fiscal 2005 and 2004.

      Strategy Machine Solutions segment revenues increased due to a $21.5 million increase in revenues from our collection and recovery solutions, a $16.6 million increase in revenues from our fraud solutions, a $14.4 million increase in revenues from our mortgage banking solutions, a $7.9 million increase in revenues from our consumer solutions and a $2.2 million increase in revenues from our other strategy machine solutions, partially offset by a $21.9 million decrease in revenues from our marketing solutions and a $14.6 million decrease in revenues from our insurance and healthcare solutions. The increase in collections and recovery solutions revenues was attributable primarily to increases in license and maintenance revenues related to acquired London Bridge solutions. The increase in fraud solutions revenues was attributable to an increase in active accounts and merchant transaction volumes with our existing customer base, and to the cross-selling of additional fraud products. The increase in mortgage banking solutions revenues was attributable to volumes associated with acquired London Bridge transactional-based agreements. The increase in consumer solutions revenues was attributable primarily to increases in revenues derived from myFICO.com and our strategic alliance partners due to increased customer volumes and higher average selling prices. The decrease in marketing solutions revenues was attributable primarily to the loss of two large financial services customers, which resulted from industry consolidation. The decrease in insurance and healthcare solutions revenues was attributable primarily to a decline in bill review volumes associated with our existing customer base, lower claims volumes at some of our key customers and loss of several customer accounts.

      Scoring Solutions segment revenues increased primarily due to an increase in revenues derived from risk scoring services at the credit reporting agencies, resulting from increased sales of scores for prescreening activities, and an increase in revenue derived from our own prescreening services.

      During fiscal 2005 and 2004, revenues generated from our agreements with Equifax, TransUnion and Experian, collectively accounted for approximately 20% of our total revenues, including revenues from these customers that are recorded in our other segments.

      Professional Services segment revenues increased $29.2 million due to an increase in implementation and precision marketing service revenues from our acquisitions of London Bridge and Braun, and a net increase of $3.8 million in revenues in various other professional service activities.

      Analytic Software Tools segment revenues increased primarily due to an increase in sales of perpetual licenses of Blaze Advisor and Model Builder software applications.

      The increase in total revenues from fiscal 2004 to fiscal 2003 included a $55.7 million increase in revenues that resulted from our acquisitions in fiscal 2004 and 2003.

      Strategy Machine Solutions segment revenues increased due to a $23.3 million increase in revenues from our customer management solutions, a $8.1 million increase in revenues from our marketing solutions, a

$7.8 million increase in revenues from our consumer solutions, a $6.5 million increase in revenues from our fraud solutions and a $4.9 million increase in revenues from our insurance and healthcare solutions, partially offset by a $2.4 million decrease in revenues from our origination solutions. The increase in customer management solutions revenues was attributable primarily to increases in both perpetual license sales and transactional volumes under transactional-based agreements, including perpetual and transactional-based revenues derived from our London Bridge acquisition in May 2004 and transactional-based revenues derived from our NAREX acquisition in July 2003, partially offset by a decline in revenues relating to a prior year non-recurring perpetual license for our strategies. The increase in marketing solutions revenues was attributable primarily to an increase in customer transaction volumes resulting from our Seurat acquisition in October 2003, partially offset by a decrease in service revenues from our existing customer base. The increase in consumer solutions revenues was attributable primarily to increases in revenues derived from our myFICO.com and strategic alliance partners due to increased customer volumes and higher average selling prices. The increase in fraud solutions revenues was attributable primarily to an increase in active accounts and merchant transaction volumes, principally due to growth in our customer base, and to the cross-selling of additional fraud products to our existing customer base. The increase in insurance and healthcare solutions revenues was attributable primarily to an increase in customer medical bill review volumes resulting from our Diversified HealthCare Services acquisition in September 2003, partially offset by a decline in bill review volumes associated with our existing customer base, including those related to the loss of a significant customer, as well as lower claims volumes at some of our key customers. The decrease in origination solutions revenues was attributable primarily to a decline in origination product perpetual license sales.

      Scoring Solutions segment revenues increased primarily due to an increase in revenues derived from risk scoring services at the credit reporting agencies, resulting from increased sales of scores for prescreening and account review, partially offset by a decrease in various other scoring services.

      During fiscal 2004 and 2003, revenues generated from our agreements with Equifax, TransUnion and Experian, collectively accounted for approximately 20% and 19%, respectively, of our total revenues, including revenues from these customers that are recorded in our other segments.

      Professional Services segment revenues increased primarily due to an increase in model development and technology and business integration services revenues, including revenues derived from our London Bridge and Seurat acquisitions in May 2004 and October 2003, respectively.

      Analytic Software Tools segment revenues increased primarily due to an increase in sales of perpetual licenses for our analytic decision tools and model development software products, including revenues derived from our London Bridge acquisition in May 2004.

Operating Expenses and Other Income (Expense)

      The following tables set forth certain summary information related to our operating expenses and other income (expense) for the fiscal years indicated.

      Cost of revenues consists primarily of employee salaries and benefits for personnel directly involved in creating, installing and supporting revenue products; travel and related overhead costs; costs of computer service bureaus; internal network hosting costs; amounts payable to credit reporting agencies for scores; software costs; and expenses related to our consumer score services through myFICO.com.

      The fiscal 2005 over 2004 increase in cost of revenues includes a $10.6 million increase in personnel and other labor-related costs, a $5.4 million increase in third-party software and data, a $4.9 million increase in facilities and infrastructure costs, and a $1.6 million net increase in various other expenditures. The increase in personnel and other labor-related costs was attributable primarily to an increase in personnel resulting from our London Bridge and Braun acquisitions. The increase in third-party software and data costs was attributable primarily to an increase in consumer solutions revenues, partially offset by a decrease in insurance and healthcare solutions revenues, and the resulting variable cost impacts. The increase in facilities and infrastructure costs was also attributable primarily to our London Bridge and Braun acquisitions.

      The fiscal 2004 over 2003 increase in cost of revenues was attributable primarily to a $7.4 million increase in third-party software and data costs and a $6.1 million increase in facilities and infrastructure costs, partially offset by a $7.1 million reduction in personnel and other labor-related costs and a $0.4 million net decrease in various other expenditures. The increase in third-party software and data costs was attributable primarily to an increase in consumer solutions, insurance and healthcare solutions and marketing solutions revenues, including those resulting from our fiscal 2003 and 2004 acquisitions. The increase in facilities and infrastructure costs was attributable primarily to our fiscal 2003 and 2004 acquisitions, partially offset by lower corporate cost of revenue allocations corresponding with the reduction in personnel described below. The reduction in personnel and other labor-related costs resulted primarily from our transfer of key management personnel into sales strategy and execution roles from their previous operational roles at the beginning of the first quarter of fiscal 2004, partially offset by an increase in personnel costs resulting from our fiscal 2003 and 2004 acquisitions.

      Excluding the impact of a new accounting rule that will require expensing of share-based awards, we expect that cost of revenues as a percentage of revenues in fiscal 2006 will be consistent with, or slightly lower than, those incurred during fiscal 2005. A discussion of the new accounting rule on share-based awards is included in the section titled “New Accounting Pronouncement Not Yet Adopted.”

      Research and development expenses include the personnel and related overhead costs incurred in development of new products and services, including primarily the research of mathematical and statistical models and the development of new versions of Strategy Machine Solutions and Analytic Software Tools.

      The fiscal 2005 over 2004 increase in research and development expenditures was attributable primarily to an increase in research and development personnel and related costs of $8.4 million, primarily as a result of our acquisition of London Bridge.

      The fiscal 2004 over 2003 increase in research and development expenditures was attributable primarily to an increase in the number of research and development personnel and related costs resulting from our acquisition of London Bridge in May 2004, partially offset by a reduction in the number of research and development personnel and related costs associated with existing development projects, primarily related to our Strategy Machine Solutions segment.

      Excluding the impact of a new accounting rule that will require expensing of share-based awards, we expect that research and development expenditures as a percentage of revenues in fiscal 2006 will be consistent with those incurred during fiscal 2005.

      Selling, general and administrative expenses consist principally of employee salaries and benefits, travel, overhead, advertising and other promotional expenses, corporate facilities expenses, legal expenses, business development expenses, and the cost of operating computer systems.

      The fiscal 2005 over 2004 increase in selling, general and administrative expenses was attributable to a $35.0 million increase in personnel and other labor-related costs, a $2.6 million increase in travel costs, a $2.3 million increase in our provision for doubtful accounts, a $0.6 million increase in legal and accounting fees and a $0.5 million net increase in other expenses. The increase in personnel and labor-related costs and travel costs resulted primarily from our London Bridge and Braun acquisitions. Legal and accounting fees were impacted by higher professional fees that resulted from our assessment of internal controls over financial reporting as required by the Sarbanes-Oxley Act and tax planning projects, partially offset by the impact of a $3.0 million charge recorded in fiscal 2004 in connection with a legal settlement.

      The fiscal 2004 over 2003 increase in selling, general and administrative expenses was attributable primarily to a $42.8 million increase in personnel and other labor-related costs, an $8.2 million increase in legal and accounting fees, a $6.9 million increase in travel costs and a $3.2 million net increase in various other expenditures, partially offset by a $3.4 million decrease in our provision for doubtful accounts. The increase in personnel and labor-related costs resulted primarily from our transfer of key management personnel into sales strategy and execution roles from their previous operational roles at the beginning of the first quarter of fiscal 2004, and to a lesser degree an increase in personnel resulting from our fiscal 2003 and 2004 acquisitions. The increase in legal fees in fiscal 2004 included a $3.0 million charge recorded in connection with a legal settlement.

      Excluding the impact of a new accounting rule that will require expensing of share-based awards, we expect that selling, general and administrative expenses as a percentage of revenues in fiscal 2006 will be consistent with, or slightly lower than, those incurred during fiscal 2005.

      Amortization of intangible assets consists of amortization expense related to intangible assets recorded in connection with acquisitions accounted for by the purchase method of accounting. Our definite-lived intangible assets, consisting primarily of completed technology and customer contracts and relationships, are being amortized using the straight-line method or based on forecasted cash flows associated with the assets over periods ranging from two to fifteen years.

      The fiscal 2005 over 2004 increase in amortization expense was attributable to incremental amortization associated with our acquisitions of London Bridge and Braun in May 2004 and November 2004, respectively.

      The fiscal 2004 over 2003 increase in amortization expense was attributable primarily to four months of amortization recorded in connection with our acquisition of London Bridge in May 2004, the incremental amortization of intangible assets recorded in fiscal 2004 in connection with our acquisition of NAREX in July 2003, Diversified HealthCare Services in September 2003, and Spectrum in December 2002, and to the full year of amortization of intangible assets recorded in connection with our acquisition of Seurat in October 2003.

      At September 30, 2005, accrued restructuring and acquisition related costs were $6.4 million, of which $3.7 million was classified as current.

      During fiscal 2004, we wrote off deferred acquisition costs totaling $0.7 million in connection with an aborted acquisition, consisting principally of third-party legal, accounting and other professional fees. Additionally, we recorded a $0.5 million charge in fiscal 2004 related to the closure of a Fair Isaac office facility upon relocating its operations into an acquired London Bridge office facility.

      During fiscal 2003, we recognized acquisition-related expenses totaling $2.5 million, consisting primarily of retention bonuses earned by HNC employees.

      Interest income is derived primarily from the investment of funds in excess of our immediate operating requirements. The fiscal 2005 over 2004 decrease in interest income was attributable to lower average cash and investment balances, partially offset by higher interest and investment income yields due to market conditions. The decrease in cash and investment balances resulted principally from cash used in investing and financing activities, including cash used for the redemption of our 5.25% Convertible Subordinated Notes (“Subordinated Notes”) in the fourth quarter of fiscal 2004, repurchases of common stock and acquisitions, partially offset by increases in net cash provided by operating activities

      The fiscal 2004 over 2003 increase in interest income was attributable primarily to higher average cash and investment balances held during fiscal 2004, partially offset by lower interest and investment income yields due to market conditions. The increase in cash and investment balances held during fiscal 2004 resulted principally from the receipt of $391.5 million in net proceeds from our issuance of the 1.5% Senior Convertible Notes (“Senior Notes”) in August 2003 and an increase in net cash provided by operating activities, partially offset by a decrease in cash balances due to our fiscal 2004 repurchases of common stock, our acquisition of London Bridge in the third quarter of fiscal 2004, and a cash redemption of our Subordinated Notes.

      The fiscal 2005 over 2004 decrease in interest expense was attributable to the redemption of our $150.0 million of Subordinated Notes in September 2004. Interest expense recorded during fiscal 2005, relates to our $400.0 million of Senior Notes, including the amortization of debt issuance costs, and is consistent with the interest expense related to the Senior Notes recorded by us in fiscal 2004.

      The fiscal 2004 over 2003 increase in interest expense was the result of our issuance of the Senior Notes in August 2003. Interest expense on the Senior Notes totaled $8.1 million and $1.3 million during fiscal 2004 and 2003, respectively.

      In July 2004, our Board of Directors approved the cash redemption of all of the outstanding Subordinated Notes at a redemption price equal to 102.625% of the $150.0 million principal amount of the Subordinated Notes, pursuant to the redemption criteria in the indenture. In September 2004, we redeemed all of the outstanding Subordinated Notes with a cash outlay of $153.9 million, which resulted in the recognition of a loss on redemption of $11.1 million, representing the excess of the redemption cost over the carrying amount of the notes upon redemption.

      Other income, net consists primarily of realized investment gains/losses, exchange rate gains/losses resulting from re-measurement of foreign-denominated receivable and cash balances held by our U.S. reporting entities into the U.S. dollar functional currency at period-end market rates, net of the impact of offsetting forward exchange contracts, and other non-operating items.

      The fiscal 2005 over 2004 decrease in other income was due to a decline in realized gains on sales of our marketable securities of $7.6 million, including a $6.6 million gain recognized last year on the sale of our investment in Open Solutions, Inc. (“OSI”). The decline in other income was partially offset by foreign exchange gains of $0.4 million recognized in fiscal 2005, compared with a net foreign currency loss of $0.9 million recorded in fiscal 2004. The foreign exchange loss in fiscal 2004 resulted from a $1.3 million net foreign exchange loss recorded in connection with our London Bridge acquisition. This net foreign exchange loss represented the excess of a loss recorded on a forward foreign exchange contract entered into in connection with this transaction over exchange rate gains resulting from the re-measurement of British pound-sterling cash balances held by one of our U.S. dollar functional currency entities for the purpose of funding the acquisition.

      The fiscal 2004 over 2003 increase in other income was attributable to an increase in realized gains on sales of our marketable securities of $6.9 million, including the $6.6 million gain recognized on the sale of our OSI investment. These gains were partially offset primarily by an increase in foreign exchange losses of $1.2 million during fiscal 2004, principally due to the $1.3 million net foreign exchange loss recorded in connection with our London Bridge acquisition.

      Our effective tax rate was 30.7%, 39.1% and 37.8% in fiscal 2005, 2004 and 2003, respectively. Our effective tax rate in fiscal 2005 was impacted by the recognition of $10.6 million of tax benefits related to prior years. These benefits were determined in conjunction with tax studies we performed with outside advisors that identified additional federal and state tax credits and other deductions related to prior years’ tax returns. The tax benefits recognized reflect our estimate of the effect of amended tax returns filed for fiscal 1998 through 2004. These tax benefits reduced our effective tax rate by 5.5%. Excluding these tax benefits, the effective tax rate for fiscal 2005 would have been 36.2%. The decline in the effective tax rate was also the result of the current year benefit of the additional deductions identified by the aforementioned tax studies.

      The fiscal 2004 over 2003 increase in our effective tax rate was principally due to decreased U.S. federal research and development tax credits resulting from the inability to recognize such credit during our fourth quarter of fiscal 2004 despite the retroactive reenactment of such credit in the first quarter of fiscal 2005, and to our inability to recognize a tax benefit on the foreign losses associated with our London Bridge subsidiary.

      The following table sets forth certain summary information on a segment basis related to our operating income for the fiscal years indicated.

      The fiscal 2005 over fiscal 2004 increase in operating income was attributable primarily to an increase in segment revenues, which included a $67.4 million increase in revenues that resulted from our acquisitions in fiscal 2005 and 2004. The increase was partially offset by an increase of $6.8 million in the amortization of intangible assets that resulted from our acquisitions in fiscal 2004 and 2005. At the segment level, the increase in segment operating income was driven by increases of $23.8 million, $8.9 million and $3.0 million in segment operating income within our Scoring Solutions, Professional Services and Analytic Software Tools segments, respectively, partially offset by a $23.7 million decrease in segment operating income within our Strategy Machine Solutions segment. The increase in Scoring Solutions segment operating income was attributable primarily to an increase in revenues derived from risk scoring services at the credit reporting agencies, resulting from increased sales of scores for prescreening activities, and an increase in revenues derived from our own prescreening services. The increase in Professional Services segment operating income was the result of an increase in Precision Marketing service revenues and implementations of EDM products. In our Analytic Software Tools segment, higher segment operating income was due to an increase in sales of perpetual licenses for our EDM products. The decrease in Strategy Machine Solutions segment operating income was attributable to revenue declines we experienced in insurance and healthcare solutions and marketing solutions, the impact of negative operating margins associated with London Bridge product offerings, partially offset by increases in sales of higher margin product offerings.

      The fiscal 2004 over fiscal 2003 increase in operating income was attributable primarily to an increase in segment revenues, which included a $55.7 million increase in revenues that resulted from our acquisitions in fiscal 2004 and 2003, and to a lesser degree, a $1.3 million decrease in restructuring and acquisition-related expenses. At the segment level, the increase in operating income was attributable primarily to $4.6 million, $2.7 million and $0.9 million increases in segment operating income within our Analytic Software Tools, Scoring Solutions and Professional Services segments, respectively, partially offset by a $3.8 million decrease in segment operating income within our Strategy Machine Solutions segment. The increase in Analytic Software Tools segment operating income was driven primarily by an increase in sales of higher margin perpetual licenses related to our analytic decision tools and model development software products. The increase in Scoring Solutions segment operating income was primarily due to an increase in revenues derived from risk scoring services at the credit reporting agencies, resulting from increased sales of scores for prescreening and account review, partially offset by a decrease in various other scoring services. The increase in Professional Services segment operating income was primarily due to an increase in higher margin model development and business consulting revenues. The decrease in Strategy Machine Solutions segment operating income was attributable primarily to the fiscal 2004 impact of negative operating margins associated with London Bridge Strategy Machine Solutions product offerings and to the allocation of the majority of a

legal settlement charge to this segment, partially offset by the growth of segment revenues and operating margins associated with other higher margin product offerings. The negative operating margins associated with London Bridge Strategy Machine Solutions were attributable in part to the write-down of deferred maintenance revenue to fair market value, resulting from purchase accounting adjustments.

Capital Resources and Liquidity

      Our primary method for funding operations and growth has been through cash flows generated from operating activities. Net cash provided by operating activities increased from $199.1 million in fiscal 2004 to $214.1 million in fiscal 2005. The increase in fiscal 2005 operating cash flows was driven by the $31.8 million increase in net income and a $14.0 million prepayment (net of revenue recognized) from a single customer for future services, which is reflected in deferred revenue in our consolidated balance sheet. Operating cash flows were negatively impacted by an increase in trade receivables of $8.2 million, which was the result of higher sales volumes and slower collections. In addition, operating cash flows were negatively affected by payments of $8.3 million for acquisition-related restructuring activities.

      Net cash provided by operating activities increased from $174.6 million in fiscal 2003 to $199.1 million in fiscal 2004, reflecting the effect of net working capital changes partially offset by a decrease of $4.4 million in net income. Operating cash flows improved as a result of increased collections of accounts receivable balances and an increase in customer prepayments.

      Net cash used in investing activities totaled $2.9 million in fiscal 2005, compared to net cash provided by investing activities of $7.4 million in fiscal 2004. The change in cash flows from investing activities was attributable to a $281.1 million decline in proceeds from sales and maturities of marketable securities, net of purchases, a $243.4 million decrease in cash paid for acquisitions, due to our acquisition of London Bridge in May 2004, and $22.7 million in cash proceeds related to our disposition of London Bridge Phoenix Software, Inc., a subsidiary of London Bridge, in November 2004.

      Net cash provided by investing activities totaled $7.4 million in fiscal 2004, compared to net cash used in investing activities of $243.5 million in fiscal 2003. The change in cash flows from investing activities was partially attributable to $313.1 million of cash proceeds from sales and maturities of marketable securities, net of purchases, in fiscal 2004 as compared with cash used of $179.7 from the purchase of marketable securities, net of sales and maturities, in fiscal 2003. In addition, cash flows from investing activities were impacted by a $236.1 million increase in net cash paid for acquisitions, principally as a result of our acquisition of London Bridge in May 2004, and a $4.9 million increase in property and equipment purchases.

      Net cash used in financing activities totaled $262.0 million in fiscal 2005, compared to net cash used in financing activities of $206.4 million in fiscal 2004. The increase in cash used for financing activities was due to a $227.4 million increase in common stock repurchased. The increase was partially offset by $153.9 million of cash used in fiscal 2004 in connection with the September 2004 redemption of our Subordinated Notes and an $18.3 million increase in cash proceeds from common stock issued under employee stock option and purchase plans.

      Net cash used in financing activities totaled $206.4 million in fiscal 2004, compared to net cash provided by financing activities of $132.0 million in fiscal 2003. The shift to net cash used in financing activities during fiscal 2004, as compared to net cash provided by financing activities during fiscal 2003, was attributable to a decrease of $391.5 million in net proceeds from the fiscal 2003 issuance of the Senior Notes, cash used of $153.9 million in connection with the September 2004 redemption of our Subordinated Notes, and a $22.5 million decrease in proceeds from issuances of common stock, partially offset by a $230.5 million decrease in cash used for repurchases of our common stock.

      From time to time, we repurchase our common stock in the open market pursuant to programs approved by our Board of Directors. During fiscal 2005, 2004 and 2003, we expended $328.5 million, $101.1 million and $331.6 million, respectively, in connection with our repurchase of common stock under such programs. In August 2005, our Board of Directors approved a new common stock repurchase program that allows us to purchase shares of our common stock up to an aggregate cost of $200.0 million. Through September 30, 2005, we had repurchased 693,400 shares of our common stock under this program for an aggregate cost of $28.6 million.

      We paid quarterly dividends of two cents per share, or eight cents per year, during each of fiscal 2005, 2004 and 2003. Our dividend rate is set by the Board of Directors on a quarterly basis taking into account a variety of factors, including among others, our operating results and cash flows, general economic and industry conditions, our obligations, changes in applicable tax laws and other factors deemed relevant by the Board. Although we expect to continue to pay dividends at the current rate, our dividend rate is subject to change from time to time based on the Board’s business judgment with respect to these and other relevant factors.

      In August 2003, we issued $400.0 million of Senior Notes that mature on August 15, 2023. The Senior Notes become convertible into shares of Fair Isaac common stock, subject to the conditions described below, at an initial conversion price of $43.9525 per share, subject to adjustments for certain events. The initial conversion price is equivalent to a conversion rate of approximately 22.7518 shares of Fair Isaac common stock per $1,000 principal amount of the Senior Notes. Holders may surrender their Senior Notes for conversion, if any of the following conditions is satisfied: (i) prior to August 15, 2021, during any fiscal quarter, if the closing price of our common stock for at least 20 trading days in the 30 consecutive trading day period ending on the last day of the immediately preceding fiscal quarter is more than 120% of the conversion price per share of our common stock on the corresponding trading day; (ii) at any time after the closing sale price of our common stock on any date after August 15, 2021 is more than 120% of the then current conversion price; (iii) during the five consecutive business day period following any 10 consecutive trading day period in which the average trading price of a Senior Note was less than 98% of the average sale price of our common stock during such 10 trading day period multiplied by the applicable conversion rate; provided, however, if, on the day before the conversion date, the closing price of our common stock is greater than 100% of the conversion price but less than or equal to 120% of the conversion price, then holders converting their notes may receive, in lieu of our common stock based on the applicable conversion rate, at our option, cash or common stock with a value equal to 100% of the principal amount of the notes on the conversion date; (iv) if we have called the Senior Notes for redemption; or (v) if we make certain distributions to holders of our common stock or we enter into specified corporate transactions. The conversion price of the Senior Notes will be adjusted upon the occurrence of certain dilutive events as described in the indenture, which include but are not limited to: (i) dividends, distributions, subdivisions, or combinations of our common stock; (ii) issuance of rights or warrants for the purchase of our common stock under certain circumstances; (iii) the distribution to all or substantially all holders of our common stock of shares of our capital stock, evidences of indebtedness, or other non-cash assets, or rights or warrants; (iv) the cash dividend or distribution to all or substantially all holders of our common stock in excess of certain levels; and (v) certain tender offer activities by us or any of our subsidiaries.

      The Senior Notes are senior unsecured obligations of Fair Isaac and rank equal in right of payment with all of our unsecured and unsubordinated indebtedness. The Senior Notes are effectively subordinated to all of our existing and future secured indebtedness and existing and future indebtedness and other liabilities of our subsidiaries. The Senior Notes bear regular interest at an annual rate of 1.5%, payable on August 15 and February 15 of each year until August 15, 2008. Beginning August 15, 2008, regular interest will accrue at the rate of 1.5%, and be due and payable upon the earlier to occur of redemption, repurchase, or final maturity. In addition, the Senior Notes bear contingent interest during any six-month period from August 15 to February

14 and from February 15 to August 14, commencing with the six-month period beginning August 15, 2008, if the average trading price of the Senior Notes for the five trading day period immediately preceding the first day of the applicable six-month period equals 120% or more of the sum of the principal amount of, plus accrued and unpaid regular interest on, the Senior Notes. The amount of contingent interest payable on the Senior Notes in respect of any six-month period will equal 0.25% per annum of the average trading price of the Senior Notes for the five trading day period immediately preceding such six-month period.

      We may redeem for cash all or part of the Senior Notes on and after August 15, 2008, at a price equal to 100% of the principal amount of the Senior Notes, plus accrued and unpaid interest. Holders may require us to repurchase for cash all or part of the $400 million of Senior Notes on August 15, 2007, August 15, 2008, August 15, 2013 and August 15, 2018, or upon a change in control, at a price equal to 100% of the principal amount of the Senior Notes being repurchased, plus accrued and unpaid interest.

      On March 31, 2005, we completed an exchange offer for the Senior Notes, whereby holders of approximately 99.9% of the total principal amount of our Senior Notes exchanged their existing securities for new 1.5% Senior Convertible Notes, Series B (“New Notes”). The terms of the New Notes are similar to the terms of the Senior Notes described above, except that: (i) upon conversion, we will pay holders cash in an amount equal to the lesser of the principal amount of such notes and the conversion value of such notes, and to the extent such conversion value exceeds the principal amount of the notes, the remainder of the conversion obligation in cash or common shares or combination thereof; (ii) in the event of a change of control, we may be required in certain circumstances to pay a make-whole premium on the New Notes converted in connection with the change of control and (iii) if the conversion condition in the first clause (iii) in the third paragraph preceding this paragraph is triggered and the closing price of our common stock is greater than 100% of the conversion price but less than or equal to 120% of the conversion price, the holders converting New Notes shall receive cash with a value equal to 100% of the principal amount of New Notes on the conversion date. We incurred approximately $1.4 million of professional fees associated with the exchange offer, which were expensed as incurred in fiscal 2005.

      We are party to a credit agreement with a financial institution that provides for a $15.0 million revolving line of credit through February 2006. Under the agreement, as amended, we are required to comply with various financial covenants, which include but are not limited to, minimum levels of domestic liquidity, parameters for treasury stock repurchases, and merger and acquisition requirements. At our option, borrowings under this agreement bear interest at the rate of LIBOR plus 1.25% (which was 5.28% at September 30, 2005) or at the financial institution’s Prime Rate (which was 6.75% at September 30, 2005), payable monthly. The agreement also includes a letter of credit subfeature that allows us to issue commercial and standby letters of credit up to a maximum amount of $5.0 million and a foreign exchange facility that allows us to enter into contracts with the financial institution to purchase and sell certain currencies, subject to a maximum aggregate amount of $25.0 million and other specified limits. As of September 30, 2005, no borrowings were outstanding under this agreement and we were in compliance with all related covenants. As of September 30, 2005, this credit facility served to collateralize certain letters of credit aggregating $0.7 million, issued by us in the normal course of business. Available borrowings under this credit agreement are reduced by the principal amount of letters of credit and by 20% of the aggregate amount of contracts to purchase and sell certain foreign currencies outstanding under the facility.

      As of September 30, 2005, we had $285.9 million in cash, cash equivalents and marketable security investments. We believe that these balances, including interest to be earned thereon, and anticipated cash flows from operating activities, will be sufficient to fund our working and other capital requirements over the course of the next twelve months and for the foreseeable future. In the normal course of business, we evaluate the merits of acquiring technology or businesses, or establishing strategic relationships with or investing in these businesses. We may elect to use available cash and cash equivalents and marketable security investments to fund such activities in the future. In the event additional needs for cash arise, we may raise

additional funds from a combination of sources, including the potential issuance of debt or equity securities. Additional financing might not be available on terms favorable to us, or at all. If adequate funds were not available or were not available on acceptable terms, our ability to take advantage of unanticipated opportunities or respond to competitive pressures could be limited.

      The following is a summary of our contractual obligations at September 30, 2005:

Off-Balance Sheet Arrangements

      We do not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future material effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources.

Critical Accounting Policies and Estimates

      We prepare our consolidated financial statements in conformity with U.S. generally accepted accounting principles. These accounting principles require management to make certain judgments and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. We periodically evaluate our estimates including those relating to revenue recognition, the allowance for doubtful accounts, goodwill and other intangible assets resulting from business acquisitions, internal-use software, income taxes and contingencies and litigation. We base our estimates on historical experience and various other assumptions that we believe to be reasonable based on the specific circumstances, the results of which form the basis for making judgments about the carrying value of certain assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

      We believe the following critical accounting policies involve the most significant judgments and estimates used in the preparation of our consolidated financial statements:

      Software license fee revenue is recognized when persuasive evidence of an arrangement exists, delivery of the product has occurred at our customer’s location, the fee is fixed or determinable and collection is probable. We use the residual method to recognize revenue when an arrangement includes one or more elements to be delivered at a future date and vendor-specific objective evidence of the fair value of all undelivered elements exists. Vendor-specific objective evidence of fair value is based on the normal pricing practices for those products and services when sold separately by us and customer renewal rates for post-contract customer support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized as revenue. If evidence of the fair value of one or more undelivered elements does not exist, the revenue is deferred and recognized when delivery of those elements

occurs or when fair value can be established. The determination of whether fees are fixed or determinable and collection is probable involves the use of assumptions. We evaluate contract terms and customer information to ensure that these criteria are met prior to our recognition of license fee revenue. We have not experienced significant variances between our assumptions and actual results in the past and anticipate that we will be able to continue to make reasonable assumptions in the future.

      When software licenses are sold together with implementation or consulting services, license fees are recognized upon delivery provided that the above criteria are met, payment of the license fees is not dependent upon the performance of the services, and the services do not provide significant customization or modification of the software products and are not essential to the functionality of the software that was delivered. For arrangements with services that are essential to the functionality of the software, the license and related service revenues are recognized using contract accounting as described below.

      If at the outset of an arrangement we determine that the arrangement fee is not fixed or determinable, revenue is deferred until the arrangement fee becomes due. If at the outset of an arrangement we determine that collectibility is not probable, revenue is deferred until the earlier of when collectibility becomes probable or the receipt of payment. If an arrangement provides for customer acceptance, revenue is not recognized until the earlier of receipt of customer acceptance or expiration of the acceptance period.

      Revenues from post-contract customer support services, such as software maintenance, are recognized on a straight-line basis over the term of the support period. The majority of our software maintenance agreements provide technical support as well as unspecified software product upgrades and releases when and if made available by us during the term of the support period.

      Revenues recognized from our credit scoring, data processing, data management and internet delivery services are recognized as these services are performed, provided persuasive evidence of an arrangement exists, fees are fixed or determinable, and collection is reasonably assured. The determination of certain of our credit scoring and data processing revenues requires the use of estimates, principally related to transaction volumes in instances where these volumes are reported to us by our clients on a monthly or quarterly basis in arrears. In these instances, we estimate transaction volumes based on preliminary customer transaction information, if available, or based on average actual reported volumes for an immediate trailing period. Differences between our estimates and actual final volumes reported are recorded in the period in which actual volumes are reported. We have not experienced significant variances between our estimates and actual reported volumes in the past and anticipate that we will be able to continue to make reasonable estimates in the future. If for some reason we were unable to reasonably estimate transaction volumes in the future, revenue may be deferred until actual customer data was received, and this could have a material impact on our results of operations during the period of time that we changed accounting methods.

      Transactional or unit-based license fees under software license arrangements, network service and internally-hosted software agreements are recognized as revenue based on system usage or when fees based on system usage exceed monthly minimum license fees, provided persuasive evidence of an arrangement exists, fees are fixed or determinable and collection is probable. The determination of certain of our transactional or unit-based license fee revenues requires the use of estimates, principally related to transaction usage or active account volumes in instances where this information is reported to us by our clients on a monthly or quarterly basis in arrears. In these instances, we estimate transaction volumes based on preliminary customer transaction information, if available, or based on average actual reported volumes for an immediate trailing period. Differences between our estimates and actual final volumes reported are recorded in the period in which actual volumes are reported. We have not experienced significant variances between our estimates and actual reported volumes in the past and anticipate that we will be able to continue to make reasonable estimates in the future. If for some reason we were unable to reasonably estimate customer account or transaction volumes in the future, revenue would be deferred until actual customer data was received, and this could have a material impact on our consolidated results of operations.

      We provide consulting, training, model development and software integration services under both hourly-based time and materials and fixed-priced contracts. Revenues from these services are generally recognized as the services are performed. For fixed-price service contracts, we apply the percentage-of-completion method

of contract accounting to determine progress towards completion, which requires the use of estimates. In such instances, management is required to estimate the input measures, generally based on hours incurred to date compared to total estimated hours of the project, with consideration also given to output measures, such as contract milestones, when applicable. Adjustments to estimates are made in the period in which the facts requiring such revisions become known and, accordingly, recognized revenues and profits are subject to revisions as the contract progresses to completion. Estimated losses, if any, are recorded in the period in which current estimates of total contract revenue and contract costs indicate a loss. If substantive uncertainty related to customer acceptance of services exists, we apply the completed contract method of accounting and defer the associated revenue until the contract is completed.

      Revenue recognized under the percentage-of-completion method in excess of contract billings is recorded as an unbilled receivable. Such amounts are generally billable upon reaching certain performance milestones as defined by individual contracts. Billings collected in advance of performance and recognition of revenue under contracts are recorded as deferred revenue.

      In certain of our non-software arrangements, we enter into contracts that include the delivery of a combination of two or more of our service offerings. Typically, such multiple element arrangements incorporate the design and development of data management tools or systems and an ongoing obligation to manage, host or otherwise run solutions for our customer. Such arrangements are divided into separate units of accounting provided that the delivered item has stand-alone value and there is objective and reliable evidence of the fair value of the undelivered items. The total arrangement fee is allocated to the undelivered elements based on their fair values and to the initial delivered elements using the residual method. Revenue is recognized separately, and in accordance with our revenue recognition policy, for each element.

      As described above, sometimes our customer arrangements have multiple deliverables, including service elements. Generally, our multiple element arrangements fall within the scope of specific accounting standards that provide guidance regarding the separation of elements in multiple-deliverable arrangements and the allocation of consideration among those elements (e.g., American Institute of Certified Public Accountants Statement of Position (“SOP”) No. 97-2, Software Revenue Recognition, as amended). If not, we apply the separation provisions of Emerging Issues Task Force (“EITF”) Issue No. 00-21, Revenue Arrangements with Multiple Deliverables. The provisions of EITF Issue No. 00-21 require us to unbundle multiple element arrangements into separate units of accounting when the delivered element(s) has stand-alone value and fair value of the undelivered element(s) exists. When we are able to unbundle the arrangement into separate units of accounting, we apply one of the accounting policies described above to each unit. If we are unable to unbundle the arrangement into separate units of accounting, we apply one of the accounting policies described above to the entire arrangement. Sometimes this results in recognizing the entire arrangement fee when delivery of the last element in a multiple element arrangement occurs. For example, if the last undelivered element is a service, we recognize revenue for the entire arrangement fee as the service is performed, or if no pattern of performance is discernable, we recognize revenue on a straight-line basis over the term of the arrangement.

      We record revenue on a net basis for those sales in which we have in substance acted as an agent or broker in the transaction.

      We make estimates regarding the collectibility of our accounts receivable. When we evaluate the adequacy of our allowance for doubtful accounts, we analyze specific accounts receivable balances, historical bad debts, customer creditworthiness, current economic trends and changes in our customer payment cycles. Material differences may result in the amount and timing of expense for any period if we were to make different judgments or utilize different estimates. If the financial condition of our customers deteriorates resulting in an impairment of their ability to make payments, additional allowances might be required. We have not experienced significant variances in the past between our estimated and actual doubtful accounts and anticipate that we will be able to continue to make reasonable estimates in the future. If for some reason we

did not reasonably estimate the amount of our doubtful accounts in the future, it could have a material impact on our consolidated results of operations.

      Our business acquisitions typically result in the recognition of goodwill and other intangible assets, and in certain cases non-recurring charges associated with the write-off of in-process research and development (“IPR&D”), which affect the amount of current and future period charges and amortization expense. Goodwill represents the excess of the purchase price over the fair value of net assets acquired, including identified intangible assets, in connection with our business combinations accounted for by the purchase method of accounting. We amortize our definite-lived intangible assets using the straight-line method or based on forecasted cash flows associated with the assets over the estimated useful lives, while IPR&D is recorded as a non-recurring charge on the acquisition date. Goodwill is not amortized, but rather is periodically assessed for impairment.

      The determination of the value of these components of a business combination, as well as associated asset useful lives, requires management to make various estimates and assumptions. Critical estimates in valuing certain of the intangible assets include but are not limited to: future expected cash flows from product sales and services, maintenance agreements, consulting contracts, customer contracts, and acquired developed technologies and patents or trademarks; expected costs to develop the IPR&D into commercially viable products and estimating cash flows from the projects when completed; the acquired company’s brand awareness and market position, as well as assumptions about the period of time the acquired products and services will continue to be used in our product portfolio; and discount rates. Management’s estimates of fair value and useful lives are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable. Unanticipated events and circumstances may occur and assumptions may change. Estimates using different assumptions could also produce significantly different results.

      We continually review the events and circumstances related to our financial performance and economic environment for factors that would provide evidence of the impairment of our intangible assets. When impairment indicators are identified with respect to our previously recorded intangible assets, then we test for impairment using undiscounted cash flows. If such tests indicate impairment, then we measure the impairment as the difference between the carrying value of the asset and the fair value of the asset, which is measured using discounted cash flows. Significant management judgment is required in forecasting of future operating results, which are used in the preparation of the projected discounted cash flows and should different conditions prevail, material write downs of net intangible assets and other long-lived assets could occur. We periodically review the estimated remaining useful lives of our acquired intangible assets. A reduction in our estimate of remaining useful lives, if any, could result in increased amortization expense in future periods.

      We test goodwill for impairment at the reporting unit level at least annually during the fourth quarter of each fiscal year and more frequently if impairment indicators are identified. We have determined that our reporting units are the same as our reportable segments. The first step of the goodwill impairment test is a comparison of the fair value of a reporting unit to its carrying value. We estimate the fair values of our reporting units using discounted cash flow valuation models and by comparing our reporting units to guideline publicly-traded companies. These methods require estimates of our future revenues, profits, capital expenditures, working capital, and other relevant factors, as well as selecting appropriate guideline publicly-traded companies for each reporting unit. We estimate these amounts by evaluating historical trends, current budgets, operating plans, industry data, and other relevant factors. The estimated fair value of each of our reporting units exceeded its respective carrying value in fiscal 2005, indicating the underlying goodwill of each reporting unit was not impaired as of our most recent testing date. Accordingly, we were not required to complete the second step of the goodwill impairment test. The timing and frequency of our goodwill impairment test is based on an ongoing assessment of events and circumstances that would more than likely reduce the fair value of a reporting unit below its carrying value. We will continue to monitor our goodwill balance and conduct formal tests on at least an annual basis or earlier when impairment indicators are present. There are various assumptions and estimates underlying the determination of an impairment loss, and estimates using different, but each reasonable, assumptions could produce significantly different results. Therefore, the timing and

recognition of impairment losses by us in the future, if any, may be highly dependent upon our estimates and assumptions. We believe that the assumptions and estimates utilized were appropriate based on the information available to management.

      Costs incurred to develop internal-use software during the application development stage are capitalized and reported at cost, subject to an impairment test as described below. Application development stage costs generally include costs associated with internal-use software configuration, coding, installation and testing. Costs of significant upgrades and enhancements that result in additional functionality are also capitalized whereas costs incurred for maintenance and minor upgrades and enhancements are expensed as incurred. We assess potential impairment of capitalized internal-use software whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted net cash flows that are expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell. This analysis requires us to estimate future net cash flows associated with the assets, as well as the future costs of selling such assets. If these estimates change, reductions or write-offs of internal-use software costs could result.

      We use the asset and liability approach to account for income taxes. This methodology recognizes deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the carrying amounts and the tax base of assets and liabilities and operating loss and tax credit carryforwards. We then record a valuation allowance to reduce deferred tax assets to an amount that more likely than not will be realized. We consider future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for the valuation allowance, which requires the use of estimates. If we determine during any period that we could realize a larger net deferred tax asset than the recorded amount, we would adjust the deferred tax asset to increase income for the period or reduce goodwill if such deferred tax asset relates to an acquisition. Conversely, if we determine that we would be unable to realize a portion of our recorded deferred tax asset, we would adjust the deferred tax asset to record a charge to income for the period or increase goodwill if such deferred tax asset relates to an acquisition. Although we believe that our estimates are reasonable, there is no assurance that our the valuation allowance will not need to be increased to cover additional deferred tax assets that may not be realizable, and such an increase could have a material adverse impact on our income tax provision and results of operations in the period in which such determination is made. In addition, the calculation of tax liabilities also involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of these uncertainties in a manner inconsistent with management’s expectations could also have a material impact on our income tax provision and results of operations in the period in which such determination is made.

      We are subject to various proceedings, lawsuits and claims relating to products and services, technology, labor, shareholder and other matters. We are required to assess the likelihood of any adverse outcomes and the potential range of probable losses in these matters. If the potential loss is considered probable and the amount can be reasonably estimated, we accrue a liability for the estimated loss. If the potential loss is considered less than probable or the amount cannot be reasonably estimated, disclosure of the matter is considered. The amount of loss accrual or disclosure, if any, is determined after analysis of each matter, and is subject to adjustment if warranted by new developments or revised strategies. Due to uncertainties related to these matters, accruals or disclosures are based on the best information available at the time. Significant judgment is required in both the assessment of likelihood and in the determination of a range of potential losses. Revisions

in the estimates of the potential liabilities could have a material impact on our consolidated financial position or consolidated results of operations.

New Accounting Pronouncement Not Yet Adopted

      In December 2004, the Financial Accounting Standards Board (“FASB”) issued Statement of Financial Accounting Standards No. 123 (Revised 2004), Share-Based Payment (“SFAS 123(R)”). SFAS 123(R) addresses all forms of share-based payment awards, including shares issued under employee stock purchase plans, stock options, restricted stock and stock appreciation rights. SFAS 123(R) will require us to measure all share based-payment awards using a fair-value method and record such expense in our consolidated financial statements. Prior to SFAS 123(R), we only included certain pro forma expense disclosures for share-based awards in the notes to our consolidated financial statements. In March 2005, the U.S. Securities and Exchange Commission (“SEC”) issued Staff Accounting Bulletin No. 107 (“SAB 107”), which expressed views of the SEC staff regarding the application of SFAS No. 123(R). Among other things, SAB 107 provides interpretive guidance related to the interaction between SFAS 123(R) and certain SEC rules and regulations, as well as providing the SEC staff’s views regarding the valuation of share-based payment arrangements for public companies. We are required to adopt the new accounting provisions of SFAS 123(R) for our first quarter of fiscal 2006. We have selected the Black-Scholes option-pricing model to determine the fair value of our awards and will recognize compensation cost on a straight-line basis over our awards’ vesting period. SFAS 123(R) requires us to record compensation expense for all awards granted after adopting the standard, as well as recording compensation expense for the unvested portion of previously granted awards outstanding at the date of adoption. The adoption of this standard will have a significant impact on our consolidated net income and net income per share. However, various uncertainties, including stock price volatility, forfeiture rates, employee stock option exercise behavior and related tax impacts, make it difficult to determine whether the stock-based compensation expense to be incurred in future periods will be similar to the pro forma expense disclosed in Note 1 to our accompanying consolidated financial statements.

RISK FACTORS

Risks Related to Our Business

      We expect that revenues derived from our scoring solutions, account management solutions, fraud solutions, originations, collections, and insurance solutions products and services will account for a substantial portion of our total revenues for the foreseeable future. Our revenues will decline if the market does not continue to accept these products and services. Factors that might affect the market acceptance of these products and services include the following:

      Our historical revenue growth has been augmented by numerous acquisitions, and we anticipate that acquisitions will continue to be an important part of our revenue growth. Our future revenue growth rate may decline if we do not make acquisitions of similar size and at a comparable rate as in the past.

      We have made in the past, and may make in the future, acquisitions of, or significant investments in, businesses that offer complementary products, services and technologies. Any acquisitions or investments will be accompanied by the risks commonly encountered in acquisitions of businesses, which include:

      These risks could harm our business, financial condition or results of operations, particularly if they occur in the context of a significant acquisition. Acquisitions of businesses having a significant presence outside the U.S. will increase our exposure to the risks of conducting operations in international markets.

      Most of our customers are relatively large enterprises, such as banks, insurance companies, healthcare firms, retailers and telecommunications carriers. As a result, many of our customers and potential customers are significantly larger than we are and may have sufficient bargaining power to demand reduced prices and favorable nonstandard terms. We also derive a substantial portion of our revenues and operating income from our contracts with the three major credit reporting agencies, TransUnion, Equifax and Experian, and other parties that distribute our products to certain markets. The loss of any major customer, the loss of a relationship with one of the major credit reporting agencies, the loss of a significant third-party distributor or the delay of significant revenue from these sources, could have a material adverse effect on our revenues and results of operations.

      Significant undetected errors or delays in new products or new versions of products may affect market acceptance of our products and could harm our business, financial condition or results of operations. In the past, we have experienced delays while developing and introducing new products and product enhancements, primarily due to difficulties developing models, acquiring data and adapting to particular operating environ-

ments. We have also experienced errors or “bugs” in our software products, despite testing prior to release of the products. Software errors in our products could affect the ability of our products to work with other hardware or software products, could delay the development or release of new products or new versions of products and could adversely affect market acceptance of our products. Errors or defects in our products that are significant, or are perceived to be significant, could result in the rejection of our products, damage to our reputation, lost revenues, diverted development resources, product liability claims and increased service and support costs and warranty claims.

      Our Scoring Solutions segment and Strategy Machine Solutions segment rely on distributors, and we intend to continue to market and distribute our products through existing and future distributor relationships. Our Scoring Solutions segment relies on, among others, TransUnion, Equifax and Experian. Failure by our existing and future distributors to generate significant revenues, demands by such distributors to change the terms on which they offer our products, or our failure to establish additional distribution or sales and marketing alliances could have a material adverse effect on our business, operating results and financial condition. In addition, distributors may compete with us either by developing competitive products themselves or by distributing competitive offerings. For example, credit reporting agencies may evaluate and seek to distribute or acquire alternative vendors’ prepaid products that compete with our products. Competition from distributors or other sales and marketing partners could significantly harm sales of our products.

      The market price of our common stock may be volatile and could be subject to wide fluctuations due to a number of factors, including variations in our revenues and operating results. We believe that you should not rely on period-to-period comparisons of financial results as an indication of future performance. Because many of our operating expenses will not be affected by short-term fluctuations in revenue, short-term fluctuations in revenues may significantly impact operating results. Additional factors that will cause our stock price to fluctuate include the following:

      In addition, the financial markets have experienced significant price and volume fluctuations that have particularly affected the stock prices of many technology companies, and these fluctuations sometimes have been unrelated to the operating performance of these companies. Broad market fluctuations, as well as industry-specific and general economic conditions may adversely affect the market price of our common stock.

      We experience difficulty in forecasting our revenues accurately because the length of our sales cycles makes it difficult for us to predict the quarter in which sales will occur. As a result of our sales cycle, license revenue and operating results may vary significantly from period to period. The sales cycle of license our products typically ranges from 60 days to 18 months. Customers are often cautious in making decisions to acquire our products, because purchasing our products typically involves a significant commitment of capital, and may involve shifts by the customer to a new software and/or hardware platform or changes in the customer’s operational procedures. Delays in completing sales can arise while customers complete their internal procedures to approve large capital expenditures and test and accept our applications. Consequently, we face difficulty predicting the quarter in which sales to expected customers will occur and experience fluctuations in our revenues and operating results. If we are unable to accurately forecast our revenues, our stock price could be adversely affected.

      Large portions of our software license agreements are consummated in the weeks immediately preceding quarter end. Before a quarter end agreements are consummated, however, we create and rely on forecasted revenues for planning, modeling and earnings guidance. Forecasts, however, are only estimates and actual results may vary for a particular quarter or longer periods of time. Consequently, significant discrepancies between actual and forecasted results could limit our ability to plan, budget or provide accurate guidance, which could adversely affect our stock price. Any publicly-stated revenue or earnings projections are subject to this risk.

      Our future success will depend in large part on our ability to attract and retain experienced sales, consulting, research and development, marketing, technical support and management personnel. The complexity of our products requires highly trained customer service and technical support personnel to assist customers with product installation and deployment. The labor market for these individuals is very competitive due to the limited number of people available with the necessary technical skills and understanding and may become more competitive with general market and economic improvement. We have experienced difficulty in recruiting qualified personnel, especially technical, sales and consulting personnel, and we may need additional staff to support new customers and/or increased customer needs. We may also recruit skilled technical professionals from other countries to work in the United States. Limitations imposed by federal immigration laws and the availability of visas could hinder our ability to attract necessary qualified personnel and harm our business and future operating results. There is a risk that even if we invest significant resources in attempting to attract, train and retain qualified personnel, we will not succeed in our efforts, and our business could be harmed. Non-appreciation in the value of our stock may adversely affect our ability to use equity and equity based incentive plans to attract and retain personnel, and may require us to use alternative and more expensive forms of compensation for this purpose.

      We must develop or obtain a reliable source of sufficient amounts of current and statistically relevant data to analyze transactions and update our products. In most cases, these data must be periodically updated and refreshed to enable our products to continue to work effectively in a changing environment. We do not own or control much of the data that we require, most of which is collected privately and maintained in proprietary databases. Customers and key business alliances provide us the data we require to analyze transactions, report results and build new models. If we fail to maintain sufficient sourcing relationships with our customers and business alliances, or if they decline to provide such data due to legal privacy concerns, competition concerns,

prohibitions or a lack of permission from their customers, we could lose access to required data and our products might become less effective. In addition, certain of our insurance solutions products use data from state workers’ compensation fee schedules adopted by state regulatory agencies. Third parties have asserted copyright interests in these data, and these assertions, if successful, could prevent us from using these data. Any interruption of our supply of data could seriously harm our business, financial condition or results of operations.

      Our success depends, in part, upon our proprietary technology and other intellectual property rights. To date, we have relied primarily on a combination of copyright, patent, trade secret, and trademark laws, and nondisclosure and other contractual restrictions on copying and distribution to protect our proprietary technology. This protection of our proprietary technology is limited, and our proprietary technology could be used by others without our consent. In addition, patents may not be issued with respect to our pending or future patent applications, and our patents may not be upheld as valid or may not prevent the development of competitive products. Any disclosure, loss, invalidity of, or failure to protect our intellectual property could negatively impact our competitive position, and ultimately, our business. There can be no assurance that our protection of our intellectual property rights in the United States or abroad will be adequate or that others, including our competitors, will not use our proprietary technology without our consent. Furthermore, litigation may be necessary to enforce our intellectual property rights, to protect our trade secrets, or to determine the validity and scope of the proprietary rights of others. Such litigation could result in substantial costs and diversion of resources and could harm our business, financial condition or results of operations.

      Some of our technologies were developed under research projects conducted under agreements with various U.S. government agencies or subcontractors. Although we have commercial rights to these technologies, the U.S. government typically retains ownership of intellectual property rights and licenses in the technologies developed by us under these contracts, and in some cases can terminate our rights in these technologies if we fail to commercialize them on a timely basis. Under these contracts with the U.S. government, the results of research may be made public by the government, limiting our competitive advantage with respect to future products based on our research.

      With recent developments in the law that permit patenting of business methods, we expect that products in the industry segments in which we compete, including software products, will increasingly be subject to claims of patent infringement as the number of products and competitors in our industry segments grow. We may need to defend claims that our products infringe patent, copyright or other rights, and as a result we may:

      Our business requires the appropriate and secure utilization of consumer and other sensitive information. Internet-based, electronic commerce requires the secure transmission of confidential information over public networks and several of our products are accessed through the Internet, including our consumer services

accessible through the www.myFICO.com website. Security breaches in connection with the delivery of our products and services, including products and services utilizing the Internet, or well-publicized security breaches and the trend toward broad consumer and general public notification of such incidents, could significantly harm our business, financial condition or results of operations. We cannot be certain that advances in criminal capabilities, discovery of new vulnerabilities, attempts to exploit vulnerabilities in our systems, data thefts, physical system or network break-ins or inappropriate access, or other developments will not compromise or breach the technology protecting the networks that access our net sourced products, consumer services and proprietary database information.

      Systems or network interruptions could delay and disrupt our ability to develop, deliver or maintain our products and services, causing harm to our business and reputation and resulting in loss of customers or revenue. These interruptions can include fires, floods, earthquakes, power losses, equipment failures and other events beyond our control.

Risks Related to Our Industry

      We have a significant share of the available market in portions of our Scoring Solutions segment and for certain services in our Strategy Machine Solutions segment (specifically, the markets for account management services at credit card processors and credit card fraud detection software). To increase our revenues, we must enhance and improve existing products and continue to introduce new products and new versions of existing products that keep pace with technological developments, satisfy increasingly sophisticated customer requirements and achieve market acceptance. We believe much of our future growth prospects will rest on our ability to continue to expand into newer markets for our products and services, such as direct marketing, healthcare, insurance, small business lending, retail, telecommunications, personal credit management, the design of business strategies using Strategy Science technology and Internet services. These areas are relatively new to our product development and sales and marketing personnel. Products that we plan to market in the future are in various stages of development. We cannot assure you that the marketplace will accept these products. If our current or potential customers are not willing to switch to or adopt our new products and services, our revenues will decrease.

      In our markets, technology changes rapidly, and there are continuous improvements in computer hardware, network operating systems, programming tools, programming languages, operating systems, database technology and the use of the Internet. If we fail to enhance our current products and develop new products in response to changes in technology or industry standards, our products could rapidly become less competitive or obsolete. For example, the rapid growth of the Internet environment creates new opportunities, risks and uncertainties for businesses, such as ours, which develop software that must also be designed to operate in Internet, intranet and other online environments. Our future success will depend, in part, upon our ability to:

      We may not be able to compete successfully against our competitors, and this inability could impair our capacity to sell our products. The market for business analytics is new, rapidly evolving and highly competitive, and we expect competition in this market to persist and intensify. Our competitors vary in size and in the scope of the products and services they offer, and include:

      We expect to experience additional competition from other established and emerging companies, as well as from other technologies. For example, certain of our fraud solutions products compete against other methods of preventing credit card fraud, such as credit cards that contain the cardholder’s photograph, smart cards, cardholder verification and authentication solutions and other card authorization techniques. Many of our anticipated competitors have greater financial, technical, marketing, professional services and other resources than we do. As a result, they may be able to respond more quickly to new or emerging technologies and changes in customer requirements. They may also be able to devote greater resources than we can to develop, promote and sell their products. Many of these companies have extensive customer relationships, including relationships with many of our current and potential customers. Furthermore, new competitors or alliances among competitors may emerge and rapidly gain significant market share. If we are unable to respond as quickly or effectively to changes in customer requirements as our competition, our ability to expand our business and sell our products will be negatively affected.

      Our competitors may be able to sell products competitive to ours at lower prices individually or as part of integrated suites of several related products. This ability may cause our customers to purchase products from our competitors that directly compete with our products. Price reductions by our competitors could negatively impact our margins, and could also harm our ability to obtain new long-term contracts and renewals of existing long-term contracts on favorable terms.

      Legislation and governmental regulation affects how our business is conducted and, in some cases, subject us to the possibility of future lawsuits arising from our products and services. Legislation and governmental regulation also influence our current and prospective customers’ activities, as well as their expectations and needs in relation to our products and services. Both our core businesses and our newer consumer initiatives are affected by regulation, including the following significant regulatory areas:

      In making credit evaluations of consumers, performing fraud screening or user authentication, our customers are subject to requirements of federal law, including FCRA, FACTA and ECOA, and regulations thereunder, as well as state laws which impose a variety of additional requirements. Privacy legislation such as GLBA and FSMA, or consumer data security standards, may also affect the nature and extent of the products or services that we can provide to customers as well as our ability to collect, monitor and disseminate information subject to privacy protection. In addition to existing regulation, changes in legislative, judicial, regulatory or consumer environments could harm our business, financial condition or results of operations. For example, the FACTA amendments to FCRA will result in new regulation. These regulations or the interpretation of these amendments could affect the demand for or profitability of some of our products, including scoring and consumer products. State regulation could cause financial institutions to pursue new strategies, reducing the demand for our products. In addition, legislative reforms of workers’ compensation laws that aim to simplify this area of regulation and curb abuses could diminish the need for, and the benefits provided by, certain of our insurance solutions products and services.

      During fiscal 2005, 75% of our revenues were derived from sales of products and services to the consumer credit, financial services and insurance industries. A downturn in the consumer credit, the financial services or the insurance industry, including a downturn caused by increases in interest rates or a tightening of credit, among other factors, could harm our business, financial condition or results of operations. While the rate of account growth in the U.S. bankcard industry has been slowing and many of our large institutional customers have merged and consolidated in recent years, we have generated most of our revenue growth from our bankcard-related scoring and account management businesses by selling and cross-selling our products and services to large banks and other credit issuers. As this industry continues to consolidate, we may have fewer opportunities for revenue growth due to changing demand for our products and services that support customer acquisition programs of our customers. In addition, industry consolidation could affect the base of recurring revenues derived from contracts in which we are paid on a per-transaction basis if consolidated customers combine their operations under one contract. There can be no assurance that we will be able effectively to promote future revenue growth in our businesses.

Risk Related to External Conditions

      During the economic slowdown in the United States and in Europe in recent years, companies in many industries delayed or reduced technology purchases, and we experienced softened demand for our decisioning solutions and other products and services. If the current improvement in economic conditions in the U.S. and Europe slows or reverses or if there is an escalation in regional or continued global conflicts or terrorism, we may experience reductions in capital expenditures by our customers, longer sales cycles, deferral or delay of purchase commitments for our products and increased price competition, which may adversely affect our business and results of operations.

      A growing portion of our revenues is derived from international sales. During fiscal 2005, 25% of our revenues were derived from business outside the United States. As part of our growth strategy, we plan to continue to pursue opportunities outside the United States. Accordingly, our future operating results could be negatively affected by a variety of factors arising out of international commerce, some of which are beyond our control. These factors include:

      There can be no assurance that we will be able to successfully address each of these challenges in the near term. Additionally, some of our business will be conducted in currencies other than the U.S. dollar. Foreign currency transaction gains and losses are not currently material to our cash flows, financial position or results of operations. However, an increase in our foreign revenues could subject us to increased foreign currency transaction risks in the future.

      Certain provisions of our Restated Certificate of Incorporation, as amended, could make a merger, tender offer or proxy contest involving us difficult, even if such events would be beneficial to the interests of our stockholders. These provisions include adoption of a Rights Agreement, commonly known as a “poison pill,” and giving our board the ability to issue preferred stock and determine the rights and designations of the preferred stock at any time without stockholder approval. The rights of the holders of our common stock will be subject to, and may be adversely affected by, the rights of the holders of any preferred stock that may be issued in the future. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could have the effect of making it more difficult for a third party to acquire, or of discouraging a third party from acquiring, a majority of our outstanding voting stock. These factors and certain provisions of the Delaware General Corporation Law may have the effect of deterring hostile takeovers or otherwise delaying or preventing changes in control or changes in our management, including transactions in which our stockholders might otherwise receive a premium over the fair market value of our common stock.

      In December 2004, the Financial Accounting Standards Board published Statement of Financial Accounting Standards No. 123(R), which will require us to measure all share-based payment awards, including stock options, using a fair-value method and record such expense. This change will first be reflected in the presentation of our consolidated financial statements for the first quarter of fiscal 2006. The adoption of this standard will have a significant negative impact on our consolidated net income and net income per share and may inhibit our use of stock option-based compensation in the future. There is uncertainty as to the ability of other forms of compensation to attract and retain employees, as well as the financial and other consequences of such forms of compensation.

      We are subject to income taxes in the United States and in certain foreign jurisdictions. Significant judgment is required in determining our worldwide provision for income taxes. Our future effective tax rates could be adversely affected by changes in tax laws, by our ability to generate taxable income in foreign jurisdictions in order to utilize foreign tax losses, and by the valuation of our deferred tax assets. In addition, we are subject to the examination of our income tax returns by the Internal Revenue Service and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of our provision for income taxes. There can be no assurance that the outcomes from such examinations will not have an adverse effect on our operating results and financial condition.

Market Risk Disclosures

      We are exposed to market risk related to changes in interest rates, equity market prices, and foreign currency exchange rates. We do not use derivative financial instruments for speculative or trading purposes.

Interest Rate Risk

      We maintain an investment portfolio consisting mainly of income securities with an average maturity of three years or less. These available-for-sale securities are subject to interest rate risk and will fall in value if market interest rates increase. We have the ability to hold our fixed income investments until maturity, and therefore we would not expect our operating results or cash flows to be affected to any significant degree by the effect of a sudden change in market interest rates on our securities portfolio. The following table presents the principal amounts and related weighted-average yields for our investments with interest rate risk at September 30, 2005 and 2004:

      We are the issuer of 1.5% Senior Convertible Notes (“Senior Notes”) that mature in August 2023. The fair value of our Senior Notes, including the New Notes issued in the exchange offer completed on March 31, 2005, as determined based on quoted market prices, may increase or decrease due to various factors, including fluctuations in the market price of our common stock, fluctuations in market interest rates and fluctuations in general economic conditions. See Management’s Discussion and Analysis of Financial Condition and Results of Operations — Capital Resources and Liquidity, above, for additional information on these notes. The following table presents the principal amounts, carrying amounts, and fair values for our Senior Notes at September 30, 2005 and 2004:

Forward Foreign Currency Contracts

      We maintain a program to manage our foreign currency exchange rate risk on existing foreign currency receivable and bank balances by entering into forward contracts to sell or buy foreign currency. At period end, foreign-denominated receivables and cash balances held by our U.S. reporting entities are remeasured into the U.S. dollar functional currency at current market rates. The change in value from this remeasurement is then reported as a foreign exchange gain or loss for that period in our accompanying consolidated statements of income and the resulting gain or loss on the forward contract mitigates the exchange rate risk of the associated assets. All of our forward foreign currency contracts have maturity periods of less than three months. Such derivative financial instruments are subject to market risk.

      The following table summarizes our outstanding forward foreign currency contracts, by currency at September 30, 2005:

      All forward foreign currency contracts were entered into on September 30, 2005, therefore, the fair value was $0 on that date.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of

Fair Isaac Corporation

Minneapolis, Minnesota

      We have audited the accompanying consolidated balance sheet of Fair Isaac Corporation and subsidiaries (the “Company”) as of September 30, 2005, and the related consolidated statements of income, stockholders’ equity and comprehensive income and cash flows for the year then ended. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audit. The consolidated financial statements of the Company for the years ended September 30, 2004 and 2003 were audited by other auditors whose report, dated November 10, 2004 (except as to the fifth paragraph of Note 1, which is as of February 24, 2005), on those statements included an explanatory paragraph that described (1) the adoption of Emerging Issues Task Force Issue No. 04-8, The Effect of Contingently Convertible Instruments on Diluted Earnings per Share, discussed in the fifth paragraph of Note 1 to the consolidated financial statements, and (2) the adoption of Statement of Financial Accounting Standards No. 142, Goodwill and Other Intangible Assets, discussed in Note 1 to the consolidated financial statements, expressed an unqualified opinion on those statements.

      We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

      In our opinion, such fiscal 2005 consolidated financial statements present fairly, in all material respects, the financial position of the Company as of September 30, 2005, and the results of its operations and its cash flows for the year then ended in conformity with accounting principles generally accepted in the United States of America.

      We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the effectiveness of the Company’s internal control over financial reporting as of September 30, 2005, based on the criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated December 12, 2005, expressed an unqualified opinion on management’s assessment of the effectiveness of the Company’s internal control over financial reporting and an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Minneapolis, Minnesota

December 12, 2005

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Fair Isaac Corporation:

      We have audited the accompanying consolidated balance sheet of Fair Isaac Corporation and subsidiaries (the “Company”) as of September 30, 2004, and the related consolidated statements of income, stockholders’ equity and comprehensive income, and cash flows for each of the years in the two-year period ended September 30, 2004. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

      We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

      In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Fair Isaac Corporation and subsidiaries as of September 30, 2004, and the results of their operations and their cash flows for each of the years in the two-year period ended September 30, 2004, in conformity with U.S. generally accepted accounting principles.

      As discussed in Note 1 to the consolidated financial statements, the Company adopted the Emerging Issues Task Force consensus with respect to Issue No. 04-8, The Effect of Contingently Convertible Instruments on Diluted Earnings per Share, during fiscal 2005 and accordingly, the Company has restated diluted earnings per share for the years ended September 30, 2004 and 2003. As discussed in Note 1 to the consolidated financial statements, the Company adopted Statement of Financial Accounting Standards No. 142, Goodwill and Other Intangible Assets, and accordingly, changed its method of accounting for goodwill effective October 1, 2002.

San Diego, California

November 10, 2004, except as to the fifth

paragraph of Note 1, which is as of

February 24, 2005

FAIR ISAAC CORPORATION

CONSOLIDATED BALANCE SHEETS

(In thousands, except par value data)

See accompanying notes to consolidated financial statements.