Exhibit 99.1

Press Release

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For Immediate Release

Fiserv Reports First Quarter 2016 Results

Internal revenue growth of 4 percent and adjusted revenue growth of 5 percent;

Adjusted EPS increase of 19 percent to $1.06;

Free cash flow increase of 11 percent to $298 million;

Full year 2016 guidance affirmed

Brookfield, Wis., May 5, 2016 – Fiserv, Inc. (NASDAQ: FISV), a leading global provider of financial services technology solutions, today reported financial results for the first quarter of 2016.

GAAP revenue in the quarter was $1.33 billion compared with $1.28 billion in the first quarter of 2015. Adjusted revenue was $1.25 billion in the first quarter compared with $1.19 billion in the first quarter of 2015, an increase of 5 percent.

GAAP earnings per share in the first quarter was $1.27 compared with $0.73 in the first quarter of 2015. The first quarter 2016 GAAP earnings per share included a net investment gain of $0.39 per share driven by a sale of a business interest at StoneRiver Group, L.P. (“StoneRiver”), a joint venture in which the company owns a 49% interest. Adjusted earnings per share increased 19 percent to $1.06 compared with $0.89 in the first quarter of 2015.

“We are pleased with our start to the year including 7 percent internal revenue growth in the Payments segment and excellent operating performance,” said Jeffery Yabuki, President and Chief Executive Officer of Fiserv. “Our business model continues to produce high-quality revenue, strong adjusted earnings per share and outstanding free cash flow.”

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Press Release

First Quarter 2016

Outlook for 2016

Fiserv continues to expect 2016 internal revenue growth in a range of 5 to 6 percent and adjusted earnings per share in a range of $4.32 to $4.44, which represents growth of 12 to 15 percent over $3.87 in 2015.

“Our results in the quarter were ahead of plan and we are well on our way to meet our 2016 financial objectives,” said Yabuki.

Earnings Conference Call

The company will discuss its first quarter 2016 results on a conference call and webcast at 4 p.m. CT on Thursday, May 5, 2016. To register for the event, go to www.fiserv.com and click on the Q1 Earnings webcast link. Supplemental materials will be available in the “Investor Relations” section of the website.

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About Fiserv

Fiserv, Inc. (NASDAQ: FISV) enables clients to achieve best-in-class results by driving quality and innovation in payments, processing services, risk and compliance, customer and channel management, and business insights and optimization. For more than 30 years, Fiserv has been a global leader in financial services technology. This year, Fiserv was honored to be named a FORTUNE^® magazine’s World’s Most Admired Company for the third consecutive year; and in 2015 was recognized among Forbes magazine’s America’s Best Employers. For more information, visit www.fiserv.com.

Use of Non-GAAP Financial Measures

In this earnings release, we supplement our reporting of information determined in accordance with GAAP, such as revenue, operating income, operating margin, net income, earnings per share and net cash provided by operating activities, with “adjusted revenue,” “internal revenue growth,” “adjusted operating income,” “adjusted operating margin,” “adjusted net income,” “adjusted earnings per share” and “free cash flow.” Management believes that adjustments for certain non-cash or other items and the exclusion of certain pass-through revenue and expenses enhance our shareholders’ ability to evaluate our performance because such items do not reflect how we manage our operations. Therefore, we exclude these items from GAAP revenue, operating income, operating margin, net income, earnings per share and net cash provided by operating activities to calculate these non-GAAP measures.

Examples of non-cash or other items may include, but are not limited to, non-cash deferred revenue adjustments arising from acquisitions, non-cash intangible asset amortization expense associated with acquisitions, non-cash impairment charges, gains or losses from unconsolidated affiliates, severance costs, charges associated with early debt extinguishment, merger and integration costs related to acquisitions, and certain costs associated with the achievement of our operational effectiveness objectives. We exclude these items to more clearly focus on the factors we believe are pertinent to the management of our operations, and we use this information to allocate resources to our various businesses.

Free cash flow and internal revenue growth are non-GAAP financial measures and are described on page 10. We believe free cash flow is useful to measure the funds generated in a given period that are available for strategic capital decisions. We believe internal revenue growth is useful because it presents revenue growth excluding the impact of postage reimbursements in our Output Solutions business, acquisitions and dispositions, and including deferred revenue purchase accounting adjustments. We believe this supplemental information enhances our shareholders’ ability to evaluate and understand our core business performance.

These non-GAAP measures should be considered in addition to, and not as a substitute for, revenue, operating income, operating margin, net income, earnings per share and net cash provided by operating activities or any other amount determined in accordance with GAAP. These non-GAAP measures reflect management’s judgment of particular items and may not be comparable to similarly titled measures reported by other companies.

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Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements regarding anticipated internal revenue growth, adjusted earnings per share and adjusted earnings per share growth. Statements can generally be identified as forward-looking because they include words such as “believes,” “anticipates,” “expects,” “could,” “should” or words of similar meaning. Statements that describe the company’s future plans, objectives or goals are also forward-looking statements. Forward-looking statements are subject to assumptions, risks and uncertainties that may cause actual results to differ materially from those contemplated by such forward-looking statements. The factors that may affect the company’s results include, among others: pricing and other actions by competitors; the capacity of the company’s technology to keep pace with a rapidly evolving marketplace; the impact of market and economic conditions on the financial services industry; the impact of a security breach or operational failure on the company’s business; the effect of legislative and regulatory actions in the United States and internationally; the company’s ability to comply with government regulations; the company’s ability to successfully identify, complete and integrate acquisitions, and to realize the anticipated benefits associated with the same; the impact of the company’s strategic initiatives; and other factors included in the company’s filings with the SEC, including its Annual Report on Form 10-K for the year ended December 31, 2015 and in other documents that the company files with the SEC. You should consider these factors carefully in evaluating forward-looking statements and are cautioned not to place undue reliance on such statements. The company assumes no obligation to update any forward-looking statements, which speak only as of the date of this press release.

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Fiserv, Inc.

Condensed Consolidated Statements of Income

(In millions, except per share amounts, unaudited)

Earnings per share is calculated using actual, unrounded amounts.

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Fiserv, Inc.

Reconciliation of GAAP to

Adjusted Net Income and Adjusted Earnings Per Share

(In millions, except per share amounts, unaudited)

See page 3 for disclosures related to the use of non-GAAP financial measures.

Earnings per share is calculated using actual, unrounded amounts.

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Fiserv, Inc.

Financial Results by Segment

(In millions, unaudited)

See page 3 for disclosures related to the use of non-GAAP financial measures.

Operating margin percentages are calculated using actual, unrounded amounts.

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Fiserv, Inc.

Condensed Consolidated Statements of Cash Flows

(In millions, unaudited)

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Fiserv, Inc.

Condensed Consolidated Balance Sheets

(In millions, unaudited)

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Fiserv, Inc.

Selected Non-GAAP Financial Measures

($ in millions, unaudited)

See page 3 for disclosures related to the use of non-GAAP financial measures.

FISV-E

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