Forward-Looking Statements

This report contains forward-looking statements based on current expectations that involve a number of risks and uncertainties. Generally, forward-looking statements do not relate strictly to historical or current facts and may include words or phrases such as "believes," "will," "expects," "anticipates," "intends," and words and phrases of similar impact. The forward-looking statements are made pursuant to safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended.

Forward-looking statements in this report include, but are not limited to, statements regarding future operations, business strategy, business environment, key trends, and, in each case, statements related to expected financial and other benefits. Many of these factors will be important in determining our actual future results. Any or all of the forward-looking statements in this report may turn out to be incorrect. They may be based on inaccurate assumptions or may not account for known or unknown risks and uncertainties. Consequently, no forward-looking statement can be guaranteed. Actual future results may vary materially from those expressed or implied in any forward-looking statements, and our business, financial condition and results of operations could be materially and adversely affected. In addition, we disclaim any obligation to update any forward-looking statements after the date of this report, except as required by law.

All of the forward-looking statements in this report are expressly qualified by the risk factors discussed in our filings with the Securities and Exchange Commission ("SEC"). Such factors include, but are not limited to, risks related to:

• the global financial crisis and the continuing decline in the global economy;

• volatility and disruption of the capital and credit markets and adverse changes in the global economy;

• consolidations and failures in the financial services industry;

• increased competition;

• restrictions and other financial covenants in our credit facility;

• the restatement of our financial statements;

• the accuracy of management's backlog estimates;

• impairment of our goodwill or intangible assets;

• exposure to unknown tax liabilities;

• risks from operating internationally;

• our offshore software development activities;

• customer reluctance to switch to a new vendor;

• the performance of our strategic product, BASE24-eps;

• our strategy to migrate customers to our next generation products;

• ratable or deferred recognition of certain revenue associated with customer migrations and the maturity of certain of our products;

• demand for our products;

• failure to obtain renewals of customer contracts or to obtain such renewals on favorable terms;

• delay or cancellation of customer projects or inaccurate project completion estimates;

• business interruptions or failure of our information technology and communication systems;

• our alliance with International Business Machines Corporation ("IBM");

• the complexity of our products and services and the risk that they may contain hidden defects or be subjected to security breaches or viruses;

• compliance of our products with applicable legislation, governmental regulations and industry standards;

• our compliance with privacy regulations;

• the protection of our intellectual property in intellectual property litigation;

• future acquisitions, strategic partnerships and investments and litigation;

• the risk that expected synergies, operational efficiencies and cost savings from our recent acquisition of S1 Corporation ("S1") may not be fully realized or realized within the expected timeframe;

• the cyclical nature of our revenue and earnings and the accuracy of forecasts due to the concentration of revenue generating activity during the final weeks of each quarter; and

• volatility in our stock price.

The cautionary statements in this report expressly qualify all of our forward-looking statements.

The following discussion should be read together with our financial statements and related notes contained in this report and with the financial statements and related notes and Management's Discussion & Analysis in our Annual Report on Form 10-K for the fiscal year ended December 31, 2011, filed February 22, 2012. Results for the three months ended March, 2012, are not necessarily indicative of results that may be attained in the future.

Overview

We develop, market, install and support a broad line of software products and services primarily focused on facilitating electronic payments. In addition to our own products, we distribute, or act as a sales agent for, software developed by third parties. Our products are sold and supported through distribution networks covering three geographic regions - the Americas, EMEA and Asia/Pacific. Each distribution network has its own sales force and supplements its sales force with independent reseller and/or distributor networks. Our products and services are used principally by financial institutions, retailers and electronic payment processors, both in domestic and international markets. Accordingly, our business and operating results are influenced by trends such as information technology spending levels, the growth rate of the electronic payments industry, mandated regulatory changes, and changes in the number and type of customers in the financial services industry. Our products are marketed under the ACI Worldwide and ACI brands.

We derive a majority of our revenues from non-domestic operations and believe our greatest opportunities for growth exist largely in international markets. Refining our global infrastructure is a critical component of driving our growth. We have launched a globalization strategy which includes elements intended to streamline our supply chain and provide low-cost centers of expertise to support a growing international customer base. We utilize our Irish subsidiaries to manage certain of our intellectual property rights and to oversee and manage certain international product development and commercialization efforts. We also continue to grow low-cost centers of expertise in Romania and India.

Key trends that currently impact our strategies and operations include:

• Global Financial Markets Uncertainty. The continuing uncertainty in the global financial markets has negatively impacted general business conditions. It is possible that a weakening economy could adversely affect our customers, their purchasing plans, or even their solvency, but we cannot predict whether or to what extent this will occur. We have diversified counterparties and customers, but we continue to monitor our counterparty and customer risks closely. While the effects of the economic conditions in the future are not predictable, we believe our global presence, the breadth and diversity of our service offerings and our enhanced expense management capabilities position us well in a slower economic climate. Market analysts, such as Boston Consulting Group, indicate that banks now recognize the importance of payments to their business, so providing services for that aspect of the business is of less risk than for other aspects of their business.

• Availability of Credit. There were significant disruptions in the capital and credit markets and many lenders and financial institutions have reduced or ceased to provide funding to borrowers. The availability of credit, confidence in the entire financial sector, and volatility in financial markets have been adversely affected. These disruptions are likely to have some impact on all institutions in the U.S. banking and financial industries, including our lenders and the lenders of our customers. The Federal Reserve Bank has been providing vast amounts of liquidity into the banking system to compensate for weaknesses in short-term borrowing markets and other capital markets. A reduction in the Federal Reserve's activities or capacity could reduce liquidity in the markets, thereby increasing funding costs or reducing the availability of funds to finance our existing operations as well as those of our customers. We are not currently dependent upon short-term funding, and the limited availability of credit in the market has not affected our revolving credit facility or our liquidity or materially impacted our funding costs.

• Increasing electronic payment transaction volumes. Electronic payment volumes continue to increase around the world, taking market share from traditional cash and check transactions. In February 2011 Boston Consulting Group predicted that noncash payment transactions would grow in volume at an annual rate of 9% from $309 billion in 2010 to $740 billion in 2020, with varying growth rates based on the type of payment and part of the world. We leverage the growth in transaction volumes through the licensing of new systems to customers whose older systems cannot handle increased volume and through the licensing of capacity upgrades to existing customers.

• Adoption of real time delivery. Customer expectations, from both consumers and corporate, are driving the payments world to more real time delivery. In the UK, payments sent through the traditional ACH multi day batch service can now be sent through the Faster Payments service giving almost immediate access to the funds and this is being considered in several countries including Singapore and the US. Corporate customers expect real time information on the status of their payments instead of waiting for an end of day report. Regulators expect banks to be monitoring key measures like liquidity in real time. ACI's focus has always been on the real time execution of transactions and delivery of information through real time tools such as dashboards so our experience will be valuable in addressing this trend.

• Adoption of cloud technology. In an effort to leverage lower-cost computing technologies, some financial institutions, retailers and electronic payment processors are seeking to transition their systems to make use of cloud technology. Currently this is impacting areas such as customer relationship management systems rather than payment services. Our investment in ACI On Demand provides us the grounding to deliver cloud capabilities in the future.

• Electronic payments fraud and compliance. As electronic payment transaction volumes increase, criminal elements continue to find ways to commit a growing volume of fraudulent transactions using a wide range of techniques. Financial institutions, retailers and electronic payment processors continue to seek ways to leverage new technologies to identify and prevent fraudulent transactions. Due to concerns with international terrorism and money laundering, financial institutions in particular are being faced with increasing scrutiny and regulatory pressures. We continue to see opportunity to offer our fraud detection solutions to help customers manage the growing levels of electronic payment fraud and compliance activity.

• Adoption of smartcard technology. In many markets, card issuers are being required to issue new cards with embedded chip technology. Chip-based cards are more secure, harder to copy and offer the opportunity for multiple functions on one card (e.g. debit, credit, electronic purse, identification, health records, etc.). The EMV standard for issuing and processing debit and credit card transactions has emerged as the global standard, with many regions throughout the world working on EMV rollouts. The primary benefit of EMV deployment is a reduction in electronic payment fraud, with the additional benefit that the core infrastructure necessary for multi-function chip cards is being put in place (e.g., chip card readers in ATMs and POS devices) allowing the deployment of other technologies like contactless. We are working with many customers around the world to facilitate EMV deployments, leveraging several of our solutions.

• Single Euro Payments Area ("SEPA"). The SEPA, primarily focused on the European Economic Community and the United Kingdom, is designed to facilitate lower costs for cross-border payments and reduce timeframes for settling electronic payment transactions. Recent moves to set an end date for the transition to SEPA payment mechanisms will drive more volume to these systems with the potential to cause banks to review the capabilities of the systems supporting these payments. Our retail and wholesale banking solutions facilitate key functions that help financial institutions address these mandated regulations. However, current uncertainty over the future of the Euro currency may delay further take up of the SEPA payment mechanisms.

• Financial institution consolidation. Consolidation continues on a national and international basis, as financial institutions seek to add market share and increase overall efficiency. Such consolidations have increased, and may continue to increase, in their number, size and market impact as a result of the global economic crisis and the financial crisis affecting the banking and financial industries. There are several potential negative effects of increased consolidation activity. Continuing consolidation of financial institutions may result in a smaller number of existing and potential customers for our products and services. Consolidation of two of our customers could result in reduced revenues if the combined entity were to negotiate greater volume discounts or discontinue use of certain of our products. Additionally, if a non-customer and a customer combine and the combined entity decides to forego future use of our products, our revenue would decline. Conversely, we could benefit from the combination of a non-customer and a customer when the combined entity continues use of our products and, as a larger combined entity, increases its demand for our products and services. We tend to focus on larger financial institutions as customers, often resulting in our solutions being the solutions that survive in the consolidated entity.

• Electronic payments convergence. As electronic payment volumes grow and pressures to lower overall cost per transaction increase, financial institutions are seeking methods to consolidate their payment processing across the enterprise. We believe that the strategy of using service-oriented-architectures to allow for re-use of common electronic payment functions such as authentication, authorization, routing and settlement will become more common. Using these techniques, financial institutions will be able to reduce costs, increase overall service levels, enable one-to-one marketing in multiple bank channels, leverage volumes for improved pricing and liquidity, and manage enterprise risk. Our Agile Payments Solution strategy is, in part, focused on this trend, by creating integrated payment functions that can be re-used by multiple bank channels, across both the consumer and wholesale bank. While this trend presents an opportunity for us, it may also expand the competition from third-party electronic payment technology and service providers specializing in other forms of electronic payments. Many of these providers are larger than us and have significantly greater financial, technical and marketing resources.

• Mobile banking and payments. There is a growing demand for the ability to carry out banking services or make payments using a mobile phone. Our customers have been making use of existing products to deploy mobile banking, mobile payment and mobile commerce and mobile payment solutions for their customers in many countries. As the market continues to develop, we expect to extend our product sets as appropriate to support mobile functionality.

The banking, financial services and payments industries have come under increased scrutiny from federal, state and foreign lawmakers and regulators in response to the crises in the financial markets and the global recession. In particular, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act"), which was signed into law July 21, 2010, represents a comprehensive overhaul of the U.S. financial services industry and requires the implementation of many new regulations that will have a direct impact on our customers and potential customers. These regulatory changes may create both opportunities and challenges for us. The application of the new regulations on our customers could create an opportunity for us to market our product capabilities and the flexibility of our solutions to assist our customers in addressing these regulations. At the same time, these regulatory changes may have an adverse impact on our operations and our financial results as we adjust our activities in light of increased compliance costs and customer requirements. It is currently too difficult to predict the actual extent to which the Dodd-Frank Act or the resulting regulations will impact our business and the businesses of our current and potential customers.

Several other factors related to our business may have a significant impact on our operating results from year to year. For example, the accounting rules governing the timing of revenue recognition in the software industry are complex and it can be difficult to estimate when we will recognize revenue generated by a given transaction. Factors such as maturity of the software product licensed, payment terms, creditworthiness of the customer, and timing of delivery or acceptance of our products often cause revenues related to sales generated in one period to be deferred and recognized in later periods. For arrangements in which services revenue is deferred, related direct and incremental costs may also be deferred. Additionally, while the majority of our contracts are denominated in the United States dollar, a substantial portion of our sales are made, and some of our expenses are incurred, in the local currency of countries other than the United States. Fluctuations in currency exchange rates in a given period may result in the recognition of gains or losses for that period.

We continue to seek ways to grow, through organic sources, partnerships, alliances, and acquisitions. We continually look for potential acquisitions designed to improve our solutions' breadth or provide access to new markets. As part of our acquisition strategy, we seek acquisition candidates that are strategic, capable of being integrated into our operating environment, and financially accretive to our financial performance.

Acquisition

On February 10, 2012, we completed the exchange offer for S1 Corporation and all its subsidiaries. The acquisition was effectively closed on February 13, 2012 for approximately $368.7 million in cash and 5.9 million shares of our stock, including 95,500 shares reissued from Treasury stock, resulting in a total purchase price of $587.3 million (the "Merger"). The combination of the Company and S1 will create a leader in the global enterprise payments industry. The combined company will have enhanced scale, breadth and additional capabilities, as well as a complementary suite of products that will better serve the entire spectrum of financial institutions, processors and retailers.

The Merger was accounted for using the acquisition method of accounting with the Company identified as the acquirer. Under the acquisition method of accounting, we recorded all assets acquired and liabilities assumed at their respective acquisition-date fair values.

We used $73.7 million of our cash balance for the acquisition in addition to $295.0 million of senior bank financing arranged through Wells Fargo Securities,
LLC. See Note 3, Debt, for terms of the financing arrangement.

The acquisition of S1 positions us as a full-service global leader of financial and payment solutions, with the ability to deliver the broadest suite of payment offerings globally targeting financial organizations, processors and retailers-supported by a global team of expert, local employees. S1 brings to the Company a highly complementary set of products, strong global capabilities and success with a range of financial institutions and retailers. Together, the combined company will provide a rich set of capabilities across the broadest payment solutions to serve retail banking, wholesale banking, processors and retailers, and is well positioned to address both emerging and developed payments markets.

We anticipate that with S1 the Company will achieve annual cost synergies of approximately $33 million. In addition, the increased global scale and expected cost savings are expected to generate margin expansion.

Restructuring

During the three months ended March 31, 2012, we reduced our headcount by 179 employees as a part of our integration with newly acquired S1. In connection with these actions, during the three months ended March 31, 2012, approximately $6.2 million of termination costs were recognized in general and administrative expense in the condensed consolidated statements of operations. Approximately $0.9 million of these termination costs were paid during the three months ended March 31, 2012. The remaining liability is expected to be paid over the next 12 months.

Subsequent Events

On April 1, 2012, we provided notice of termination for the Master Services Agreement with International Business Machines to outsource our internal information technology environment. The effective date of the termination will be January 31, 2013. We will incur a $3.0 million termination fee that will be paid at the termination date of January 31, 2013, in addition to additional fees related to the transition in accordance with the terms of the agreement.

Backlog

Included in backlog estimates are all software license fees, maintenance fees and services fees specified in executed contracts, as well as revenues from assumed contract renewals to the extent that we believe recognition of the related revenue will occur within the corresponding backlog period. We have historically included assumed renewals in backlog estimates based upon automatic renewal provisions in the executed contract and our historic experience with customer renewal rates.

Our 60-month backlog estimate represents expected revenues from existing customers using the following key assumptions:

• Maintenance fees are assumed to exist for the duration of the license term for those contracts in which the committed maintenance term is less than the committed license term.

• License and facilities management arrangements are assumed to renew at the end of their committed term at a rate consistent with our historical experiences.

• Non-recurring license arrangements are assumed to renew as recurring revenue streams.

• Foreign currency exchange rates are assumed to remain constant over the 60-month backlog period for those contracts stated in currencies other than the U.S. dollar.

• Our pricing policies and practices are assumed to remain constant over the 60-month backlog period.

In computing our 60-month backlog estimate, the following items are specifically not taken into account:

• Anticipated increases in transaction volumes in customer systems.

• Optional annual uplifts or inflationary increases in recurring fees.

• Services engagements, other than facilities management, are not assumed to renew over the 60-month backlog period.

• The potential impact of merger activity within our markets and/or customers.

We review our customer renewal experience on an annual basis. The impact of this review and subsequent update may result in a revision to the renewal assumptions used in computing the 60-month and 12-month backlog estimates. In the event a revision to renewal assumptions is determined to be necessary, prior periods will be adjusted for comparability purposes. Based on our annual review of customer renewal experience completed during the three months ended December 31, 2011, backlog results for all reported periods have been updated to reflect our most current customer renewal experience.

The following table sets forth our 60-month backlog estimate, by geographic region, as of March 31, 2012 and December 31, 2011 (in millions). The March 31, 2012 60-month backlog estimate includes approximately $705 million as a result of the acquisition of S1. Dollar amounts reflect foreign currency exchange rates as of each period end.

                                     March 31,      December 31,
                                       2012             2011
                     Americas       $     1,405     $         912
                     EMEA                   669               514
                     Asia/Pacific           243               191

                     Total          $     2,317     $       1,617

Included in our 60-month backlog estimates are amounts expected to be recognized during the initial license term of customer contracts ("Committed Backlog") and amounts expected to be recognized from assumed renewals of existing customer contracts ("Renewal Backlog"). Amounts expected to be recognized from assumed contract renewals are based on our historical renewal experience.

The following table sets forth our 60-month Committed Backlog and Renewal Backlog estimates as of March 31, 2012 and December 31, 2011 (in millions). Dollar amounts reflect foreign currency exchange rates as of each period end.

                                   March 31,      December 31,
                                     2012             2011
                      Committed   $     1,117     $         952
                      Renewal           1,200               665

                      Total       $     2,317     $       1,617

We also estimate 12-month backlog, segregated between monthly recurring and non-recurring revenues, using a methodology consistent with the 60-month backlog estimate. Monthly recurring revenues include all monthly license fees, . . .