DISCOVER FINANCIAL SERVICES (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 26, 2017 DISCOVER FINANCIAL SERVICES (Exact name of registrant as specified in its charter) Commission File Number: 001-33378 Delaware 36-2517428 (State or other jurisdiction of incorporation) 2500 Lake Cook Road, Riverwoods, Illinois 60015 (Address of principal executive offices, including zip code) (224) 405-0900 (Registrant's telephone number, including area code) N/A (Former name or former address, if changed since last report) (IRS Employer Identification No.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 ( 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 ( 240.12b-2 of this chapter). o Emerging growth company o If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act

Item 2.02. Results of Operations and Financial Condition. On July 26, 2017, Discover Financial Services (the Company ) released financial information with respect to the quarter ended June 30, 2017. Copies of the press release, financial data supplement and financial results presentation containing this information are attached hereto as exhibits and incorporated herein by reference. The information contained in this Item 2.02 of this Current Report on Form 8-K, including the exhibits, is furnished pursuant to Item 2.02 of Form 8-K and shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as shall be expressly stated by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 99.1 Press Release of the Company dated July 26, 2017 containing financial information for the quarter ended June 30, 2017 99.2 Financial Data Supplement of the Company for the quarter and the six months ended June 30, 2017 99.3 Financial Results Presentation of the Company for the quarter ended June 30, 2017

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. DISCOVER FINANCIAL SERVICES Dated: July 26, 2017 By: /s/ D. Christopher Greene Name: D. Christopher Greene Title: Vice President, Deputy General Counsel and Assistant Secretary

EXHIBIT INDEX Exhibit No. Description 99.1 Press Release of the Company dated July 26, 2017 containing financial information for the quarter ended June 30, 2017 99.2 Financial Data Supplement of the Company for the quarter and the six months ended June 30, 2017 99.3 Financial Results Presentation of the Company for the quarter ended June 30, 2017

Exhibit 99.1 DISCOVER FINANCIAL SERVICES REPORTS SECOND QUARTER NET INCOME OF $546 MILLION OR $1.40 PER DILUTED SHARE Riverwoods, IL, July 26, 2017 - Discover Financial Services (NYSE: DFS) today reported net income of $546 million or $1.40 per diluted share for the second quarter of 2017, as compared to $616 million or $1.47 per diluted share for the second quarter of 2016. The company s return on equity for the second quarter of 2017 was 19%. Second Quarter Highlights Total loans grew $6.1 billion ( 8% ) from the prior year to $78.0 billion. Credit card loans grew $4.6 billion ( 8% ) to $61.8 billion and Discover card sales volume increased 5% from the prior year. Total net charge-off rate excluding PCI loans increased 52 basis points from the prior year to 2.79% and the total delinquency rate over 30 days past due excluding PCI loans increased 33 basis points from the prior year to 1.93%. Consumer deposits grew $3.6 billion ( 11% ) from the prior year to $37.7 billion. Payment Services transaction dollar volume was $50.1 billion, up 12% from the prior year. We delivered profitable loan growth, strong revenue growth and positive operating leverage, which helped to offset normalizing credit costs, said David Nelms, chairman and CEO of Discover. Our new capital plan includes higher dividends and planned share repurchases, and we expect to continue to deliver a leading yield to our shareholders." Segment Results: Direct Banking Direct Banking pretax income of $831 million in the quarter declined $37 million ( 4% ) from the prior year as higher provision for loan losses more than offset higher net interest income. Total loans ended the quarter at $ 78.0 billion, up 8% compared to the prior year. Credit card loans ended the quarter at $61.8 billion, up 8% from the prior year. Personal loans increased $1.2 billion ( 22% ) from the prior year. Private student loans increased $191 million ( 2% ) year-over-year, and grew $703 million ( 12% ) excluding purchased student loans. Net interest income increased $187 million ( 11% ) from the prior year, driven by loan growth and a higher net interest margin. Net interest margin was 10.11%, up 16 basis points from the prior year. Card yield was 12.66%, an increase of 24 basis points from the prior year because of increases in the prime rate, partially offset by higher interest charge-offs. Interest expense as a percent of total loans increased 16 basis points from the prior year, primarily because of higher market rates and a change in funding mix. Other income increased $12 million ( 3% ) from the prior year, driven by higher discount and interchange revenue. The delinquency rate for credit card loans over 30 days past due was 2.00%, up 37 basis points from the prior year and down 6 basis points from the prior quarter. The credit card net charge-off rate for the second quarter was 2.94%, up 55 basis points from the prior year and 10 basis points from the prior quarter. The student loan net charge-off rate excluding purchased credit-impaired ("PCI") loans was 1.15%, up 5 basis points from the prior year. The personal loans net charge-off rate of 3.18% increased by 80 basis points from the prior year. Net charge-off rates were generally higher because of supply-driven credit normalization and the seasoning of loan growth from the last few years. Provision for loan losses of $639 million increased $228 million from the prior year primarily because of higher net charge-offs. The reserve build for the second quarter of 2017 was $ 119 million, compared to a reserve build of $ 27 million in the second quarter of 2016. Expenses increased $8 million from the prior year as higher employee compensation was partially offset by a decline in information processing, mainly due to infrastructure efficiencies. Employee compensation increased mostly because of higher staffing levels, as well as higher average salaries.

Payment Services Payment Services pretax income was $36 million in the quarter, up $6 million from the prior year, primarily driven by higher transaction processing revenue and lower operating expense. Payment Services transaction dollar volume was $50.1 billion, up 12% versus the prior year. PULSE transaction dollar volume was up 15% year-over-year. Diners Club International volume increased 8% from the prior year, driven by growth across all regions. Share Repurchases During the second quarter of 2017, the company repurchased approximately 7.2 million shares of common stock for $450 million. Shares of common stock outstanding declined by 1.9% from the prior quarter. Conference Call and Webcast Information The company will host a conference call to discuss its fourth quarter results on Wednesday, July 26, 2017, at 4:00 p.m. Central time. Interested parties can listen to the conference call via a live audio webcast at https://investorrelations.discover.com. About Discover Discover Financial Services (NYSE: DFS) is a direct banking and payment services company with one of the most recognized brands in U.S. financial services. Since its inception in 1986, the company has become one of the largest card issuers in the United States. The company issues the Discover card, America's cash rewards pioneer, and offers private student loans, personal loans, home equity loans, checking and savings accounts and certificates of deposit through its direct banking business. It operates the Discover Network, with millions of retail and cash access locations; PULSE, one of the nation's leading ATM/debit networks; and Diners Club International, a global payments network with acceptance in more than 185 countries and territories. For more information, visit www.discover.com/company. Contacts: Investors: Tim Schmidt, 224-405-4996 timothyschmidt@discover.com Media: Jon Drummond, 224-405-1888 jondrummond@discover.com

A financial summary follows. Financial, statistical, and business related information, as well as information regarding business and segment trends, is included in the financial supplement filed as Exhibit 99.2 to the company's Current Report on Form 8-K filed today with the Securities and Exchange Commission ( SEC ). Both the earnings release and the financial supplement are available online at the SEC's website (http://www.sec.gov) and the company's website (https://investorrelations.discover.com). This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements, which speak to our expected business and financial performance, among other matters, contain words such as believe, expect, anticipate, intend, plan, aim, will, may, should, could, would, likely, and similar expressions. Such statements are based upon the current beliefs and expectations of the company's management and are subject to significant risks and uncertainties. Actual results may differ materially from those set forth in the forward-looking statements. These forward-looking statements speak only as of the date of this press release, and there is no undertaking to update or revise them as more information becomes available. The following factors, among others, could cause actual results to differ materially from those set forth in the forward-looking statements: changes in economic variables, such as the availability of consumer credit, the housing market, energy costs, the number and size of personal bankruptcy filings, the rate of unemployment, the levels of consumer confidence and consumer debt, and investor sentiment; the impact of current, pending and future legislation, regulation, supervisory guidance, and regulatory and legal actions, including, but not limited to, those related to financial regulatory reform, consumer financial services practices, anti-corruption, and funding, capital and liquidity; the actions and initiatives of current and potential competitors; the company's ability to manage its expenses; the company's ability to successfully achieve card acceptance across its networks and maintain relationships with network participants; the company's ability to sustain and grow its non-card products; difficulty obtaining regulatory approval for, financing, closing, transitioning, integrating or managing the expenses of acquisitions of or investments in new businesses, products or technologies; the company's ability to manage its credit risk, market risk, liquidity risk, operational risk, compliance and legal risk, and strategic risk; the availability and cost of funding and capital; access to deposit, securitization, equity, debt and credit markets; the impact of rating agency actions; the level and volatility of equity prices, commodity prices and interest rates, currency values, investments, other market fluctuations and other market indices; losses in the company's investment portfolio; limits on the company's ability to pay dividends and repurchase its common stock; limits on the company's ability to receive payments from its subsidiaries; fraudulent activities or material security breaches of key systems; the company's ability to remain organizationally effective; the company's ability to increase or sustain Discover card usage or attract new customers; the company's ability to maintain relationships with merchants; the effect of political, economic and market conditions, geopolitical events and unforeseen or catastrophic events; the company's ability to introduce new products or services; the company's ability to manage its relationships with third-party vendors; the company's ability to maintain current technology and integrate new and acquired systems; the company's ability to collect amounts for disputed transactions from merchants and merchant acquirers; the company's ability to attract and retain employees; the company's ability to protect its reputation and its intellectual property; and new lawsuits, investigations or similar matters or unanticipated developments related to current matters. The company routinely evaluates and may pursue acquisitions of or investments in businesses, products, technologies, loan portfolios or deposits, which may involve payment in cash or the company's debt or equity securities. Additional factors that could cause the company's results to differ materially from those described in the forward-looking statements can be found under Risk Factors, Business - Competition, Business - Supervision and Regulation and Management's Discussion and Analysis of Financial Condition and Results of Operations in the company's Annual Report on Form 10-K for the year ended December 31, 2016, and "Management's Discussion & Analysis of Financial Condition and Results of Operations" in the company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2017, which are filed with the SEC and available at the SEC's internet site (http://www.sec.gov).

DISCOVER FINANCIAL SERVICES Exhibit 99.2 EARNINGS SUMMARY (unaudited, in millions, except per share statistics) EARNINGS SUMMARY Quarter Ended Six Months Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 Jun 30, 2017 Jun 30, 2016 2017 vs. 2016 Interest Income $2,338 $2,278 $2,258 $2,184 $2,090 $248 12% $4,616 $4,174 $442 11% Interest Expense 400 386 366 359 339 61 18% 786 673 113 17% Net Interest Income 1,938 1,892 1,892 1,825 1,751 187 11% 3,830 3,501 329 9% Discount/Interchange Revenue 666 596 665 631 636 30 5% 1,262 1,201 61 5% Rewards Cost 388 363 411 368 371 17 5% 751 663 88 13% Discount and Interchange Revenue, net 278 233 254 263 265 13 5% 511 538 (27) (5%) Protection Products Revenue 56 58 59 60 59 (3) (5%) 114 120 (6) (5%) Loan Fee Income 83 89 93 91 79 4 5% 172 159 13 8% Transaction Processing Revenue 42 39 40 40 39 3 8% 81 75 6 8% Other Income 22 28 20 22 23 (1) (4%) 50 47 3 6% Total Other Income 481 447 466 476 465 16 3% 928 939 (11) (1%) Revenue Net of Interest Expense 2,419 2,339 2,358 2,301 2,216 203 9% 4,758 4,440 318 7% Provision for Loan Losses 640 586 578 445 412 228 55% 1,226 836 390 47% Employee Compensation and Benefits 367 363 352 342 340 27 8% 730 685 45 7% Marketing and Business Development 192 168 176 195 198 (6) (3%) 360 360 % Information Processing & Communications 77 80 81 81 89 (12) (13%) 157 177 (20) (11%) Professional Fees 156 147 152 143 150 6 4% 303 310 (7) (2%) Premises and Equipment 23 25 23 25 23 % 48 47 1 2% Other Expense 97 102 113 109 106 (9) (8%) 199 213 (14) (7%) Total Other Expense 912 885 897 895 906 6 1% 1,797 1,792 5 % Income Before Income Taxes 867 868 883 961 898 (31) (3%) 1,735 1,812 (77) (4%) Tax Expense 321 304 320 322 282 39 14% 625 621 4 1% Net Income $546 $564 $563 $639 $616 ($70) (11%) $1,110 $1,191 ($81) (7%) Net Income Allocated to Common Stockholders $532 $551 $550 $625 $602 ($70) (12%) $1,083 $1,164 ($81) (7%) Effective Tax Rate 37.1% 35.0% 36.3% 33.5% 31.4% 36.0% 34.3% Net Interest Margin 10.11% 10.07% 10.07% 9.99% 9.94% 17 bps 10.09% 9.94% 15 bps Operating Efficiency 37.7% 37.9% 38.0% 38.9% 40.9% (320) bps 37.8% 40.4% (260) bps ROE 19% 20% 20% 23% 22% 20% 21% Capital Returned to Common Stockholders $547 $620 $581 $689 $523 $24 5% $1,167 $1,036 $131 13% Payout Ratio 103% 113% 106% 110% 87% 108% 89% 1,900 bps Ending Common Shares Outstanding 375 382 389 396 407 (32) (8%) 375 407 (32) (8%) Weighted Average Common Shares Outstanding 379 386 392 402 410 (31) (8%) 382 414 (32) (8%) Weighted Average Common Shares Outstanding (fully diluted) 379 386 393 402 411 (32) (8%) 382 414 (32) (8%) PER SHARE STATISTICS Basic EPS $1.41 $1.43 $1.40 $1.56 $1.47 ($0.06) (4%) $2.83 $2.81 $0.02 1% Diluted EPS $1.40 $1.43 $1.40 $1.56 $1.47 ($0.07) (5%) $2.83 $2.81 $0.02 1% Common Stock Price (period end) $62.19 $68.39 $72.09 $56.55 $53.59 $8.60 16% $62.19 $53.59 $8.60 16% Book Value per share $30.01 $29.46 $29.13 $28.62 $28.03 $1.98 7% $30.01 $28.03 $1.98 7% Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES EARNINGS SUMMARY (unaudited, in millions) Quarter Ended Six Months Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 Jun 30, 2017 Jun 30, 2016 2017 vs. 2016 SEGMENT- INCOME BEFORE INCOME TAXES Direct Banking $831 $824 $868 $931 $868 ($37) (4%) $1,655 $1,750 ($95) (5%) Payment Services 36 44 15 30 30 6 20% 80 62 18 29% Total $867 $868 $883 $961 $898 ($31) (3%) $1,735 $1,812 ($77) (4%) TRANSACTIONS PROCESSED ON NETWORKS Discover Network 551 503 566 535 538 13 2% 1,054 1,024 30 3% PULSE Network 961 870 891 871 853 108 13% 1,831 1,694 137 8% Total 1,512 1,373 1,457 1,406 1,391 121 9% 2,885 2,718 167 6% NETWORK VOLUME PULSE Network $38,848 $36,066 $35,554 $33,913 $33,856 $4,992 15% $74,914 $68,536 $6,378 9% Network Partners 3,461 3,661 3,235 3,313 3,713 (252) (7%) 7,122 7,285 (163) (2%) Diners Club International 1 7,800 7,382 7,334 7,331 7,198 602 8% 15,182 13,936 1,246 9% Total Payment Services 50,109 47,109 46,123 44,557 44,767 5,342 12% 97,218 89,757 7,461 8% Discover Network - Proprietary 33,342 29,859 34,029 31,759 31,780 1,562 5% 63,201 60,356 2,845 5% Total $83,451 $76,968 $80,152 $76,316 $76,547 $6,904 9% $160,419 $150,113 $10,306 7% 1 Volume is derived from data provided by licensees for Diners Club branded cards issued outside of North America and is subject to subsequent revision or amendment Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES BALANCE SHEET SUMMARY (unaudited, in millions) Quarter Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 BALANCE SHEET SUMMARY Assets Cash and Investment Securities $14,722 $17,981 $13,766 $15,728 $14,236 $486 3% Total Loan Receivables 77,997 75,853 77,254 73,551 71,924 6,073 8% Allowance for Loan Losses (2,384) (2,264) (2,167) (2,024) (1,949) (435) (22%) Net Loan Receivables 75,613 73,589 75,087 71,527 69,975 5,638 8% Premises and Equipment, net 774 750 734 722 708 66 9% Goodwill and Intangible Assets, net 419 420 421 421 422 (3) (1%) Other Assets 2,229 2,055 2,300 2,143 2,170 59 3% Total Assets $93,757 $94,795 $92,308 $90,541 $87,511 $6,246 7% Liabilities & Stockholders' Equity Direct to Consumer and Affinity Deposits $37,709 $37,094 $36,002 $35,323 $34,101 $3,608 11% Brokered Deposits and Other Deposits 15,155 16,428 15,990 13,922 14,426 729 5% Deposits 52,864 53,522 51,992 49,245 48,527 4,337 9% Borrowings 26,438 26,823 25,443 26,830 24,681 1,757 7% Accrued Expenses and Other Liabilities 3,196 3,185 3,550 3,119 2,906 290 10% Total Liabilities 82,498 83,530 80,985 79,194 76,114 6,384 8% Total Equity 11,259 11,265 11,323 11,347 11,397 (138) (1%) Total Liabilities and Stockholders' Equity $93,757 $94,795 $92,308 $90,541 $87,511 $6,246 7% LIQUIDITY Liquidity Portfolio $13,865 $16,213 $12,635 $14,017 $13,455 410 3% Undrawn Credit Facilities 1 31,877 30,823 30,194 29,048 30,777 1,100 4% Total Liquidity $45,742 $47,036 $42,829 $43,065 $44,232 1,510 3% 1 Excludes investments pledged to the Federal Reserve, which is included within the liquidity portfolio Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES BALANCE SHEET STATISTICS (unaudited, in millions) Quarter Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 BALANCE SHEET STATISTICS Total Common Equity $10,699 $10,705 $10,763 $10,787 $10,837 ($138) (1%) Total Common Equity/Total Assets 11.4% 11.3% 11.7% 11.9% 12.4% Total Common Equity/Net Loans 14.2% 14.5% 14.3% 15.1% 15.5% Tangible Assets $93,338 $94,375 $91,887 $90,120 $87,089 $6,249 7% Tangible Common Equity 1 $10,280 $10,285 $10,342 $10,366 $10,415 ($135) (1%) Tangible Common Equity/Tangible Assets 1 11.0% 10.9% 11.3% 11.5% 12.0% Tangible Common Equity/Net Loans 1 13.6% 14.0% 13.8% 14.5% 14.9% Tangible Common Equity per share 1 $27.40 $26.90 $26.60 $26.15 $25.62 $1.78 7% REGULATORY CAPITAL RATIOS Basel III Transition Total Risk Based Capital Ratio 15.2% 15.7% 15.5% 16.3% 16.7% Tier 1 Risk Based Capital Ratio 13.7% 14.1% 13.9% 14.6% 15.0% Tier 1 Leverage Ratio 11.8% 11.8% 12.3% 12.6% 12.8% Common Equity Tier 1 Capital Ratio 13.0% 13.4% 13.2% 13.9% 14.3% Basel III Fully Phased-in Common Equity Tier 1 Capital Ratio 2 13.0% 13.4% 13.2% 13.8% 14.2% RATIO OF EARNINGS TO FIXED CHARGES Ratio of Earnings to Fixed Charges 3, 4 3.2 3.3 3.6 3.7 3.7 1 Tangible Common Equity ("TCE") is a non-gaap measure. The Company believes TCE is a more meaningful measure to investors of the net asset value of the Company. For corresponding reconciliation of TCE to a GAAP financial measure see Reconciliation of GAAP to non-gaap Data schedule 2 Common Equity Tier 1 Capital Ratio (Basel III Fully Phased-in) is calculated using Basel III Fully Phased-in Common Equity Tier 1 Capital, a non-gaap measure. The Company believes that the Common Equity Tier 1 Capital Ratio based on Fully Phased-in Basel III rules is an important complement to the existing capital ratios and for comparability to other financial institutions. For the corresponding reconciliation of Common Equity Tier 1 Capital and Risk Weighted Assets calculated under Fully Phased-in Basel III rules to Common Equity Tier 1 Capital and Risk Weighted Assets calculated under Basel III transition rules see the Reconciliation of GAAP to non-gaap data schedule 3 Fixed charges are the sum of interest expense, amortized premiums, discounts and capitalized expenses related to indebtedness and an estimate of interest within rental expense 4 The Ratio of Earnings to Fixed Charges is a year-to-date statistic. The periods reported reflect the six months ended June 30, 2017, the three months ended March 31, 2017, the twelve months ended December 31, 2016, the nine months ended September 30, 2016 and the six months ended June 30, 2016 Note: See Glossary of Financial Terms for definitions of financial terms.

DISCOVER FINANCIAL SERVICES AVERAGE BALANCE SHEET (unaudited, in millions) Quarter Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 AVERAGE BALANCES Assets Cash and Investment Securities $14,616 $15,424 $13,567 $13,761 $14,299 $317 2% Restricted Cash 559 819 473 621 263 296 113% Credit Card Loans 60,700 60,122 59,121 57,561 56,124 4,576 8% Private Student Loans 9,020 9,197 8,954 8,795 8,816 204 2% Personal Loans 6,820 6,582 6,425 6,036 5,608 1,212 22% Other Loans 314 284 275 276 262 52 20% Total Loans 76,854 76,185 74,775 72,668 70,810 6,044 9% Total Interest Earning Assets 92,029 92,428 88,815 87,050 85,372 6,657 8% Allowance for Loan Losses (2,262) (2,166) (2,021) (1,947) (1,918) (344) (18%) Other Assets 4,147 4,166 4,162 4,282 4,502 (355) (8%) Total Assets $93,914 $94,428 $90,956 $89,385 $87,956 $5,958 7% Liabilities and Stockholders' Equity Direct to Consumer and Affinity Deposits $36,956 $36,316 $35,396 $34,488 $33,215 $3,741 11% Brokered Deposits and Other Deposits 15,600 16,242 14,355 14,267 14,740 860 6% Total Interest-bearing Deposits 52,556 52,558 49,751 48,755 47,955 4,601 10% Short-term Borrowings 2 1 1 2 2 % Securitized Borrowings 16,141 16,960 16,817 16,736 16,635 (494) (3%) Other Long-term Borrowings 9,979 9,600 9,042 8,746 7,984 1,995 25% Total Interest-bearing Liabilities 78,678 79,119 75,611 74,239 72,576 6,102 8% Other Liabilities & Stockholders' Equity 15,236 15,309 15,345 15,146 15,380 (144) (1%) Total Liabilities and Stockholders' Equity $93,914 $94,428 $90,956 $89,385 $87,956 $5,958 7% AVERAGE RATES Assets Cash and Investment Securities 1.12% 0.90% 0.72% 0.70% 0.71% 41 bps Restricted Cash 0.89% 0.70% 0.37% 0.32% 0.41% 48 bps Credit Card Loans 12.66% 12.65% 12.62% 12.53% 12.42% 24 bps Private Student Loans 7.45% 7.29% 7.06% 7.13% 7.13% 32 bps Personal Loans 12.22% 12.18% 12.09% 12.23% 12.25% (3) bps Other Loans 5.59% 5.39% 4.88% 4.96% 5.04% 55 bps Total Loans 11.98% 11.94% 11.88% 11.82% 11.72% 26 bps Total Interest Earning Assets 10.19% 9.99% 10.12% 9.98% 9.84% 35 bps Liabilities and Stockholders' Equity Direct to Consumer and Affinity Deposits 1.29% 1.25% 1.26% 1.26% 1.22% 7 bps Brokered Deposits and Other Deposits 2.07% 1.98% 1.93% 1.90% 1.78% 29 bps Total Interest-bearing Deposits 1.52% 1.48% 1.45% 1.45% 1.39% 13 bps Short-term Borrowings 1.06% 0.67% 0.60% 0.62% 0.64% 42 bps Securitized Borrowings 2.31% 2.17% 2.09% 2.07% 2.06% 25 bps Other Long-term Borrowings 4.36% 4.38% 4.26% 4.27% 4.40% (4) bps Total Interest-bearing Liabilities 2.04% 1.98% 1.93% 1.92% 1.88% 16 bps Net Interest Margin 10.11% 10.07% 10.07% 9.99% 9.94% 17 bps Net Yield on Interest-earning Assets 8.44% 8.30% 8.47% 8.34% 8.25% 19 bps Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES LOAN STATISTICS (unaudited, in millions) Quarter Ended Six Months Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 Jun 30, 2017 Jun 30, 2016 2017 vs. 2016 TOTAL LOAN RECEIVABLES Ending Loans 1, 2 $77,997 $75,853 $77,254 $73,551 $71,924 $6,073 8% $77,997 $71,924 $6,073 8% Average Loans 1, 2 $76,854 $76,185 $74,775 $72,668 $70,810 $6,044 9% $76,521 $70,823 $5,698 8% Interest Yield 11.98% 11.94% 11.88% 11.82% 11.72% 26 bps 11.96% 11.71% 25 bps Gross Principal Charge-off Rate 3.36% 3.25% 2.91% 2.66% 2.87% 49 bps 3.31% 2.83% 48 bps Gross Principal Charge-off Rate excluding PCI Loans 3 3.47% 3.37% 3.02% 2.77% 2.99% 48 bps 3.42% 2.96% 46 bps Net Principal Charge-off Rate 2.71% 2.60% 2.31% 2.02% 2.18% 53 bps 2.65% 2.15% 50 bps Net Principal Charge-off Rate excluding PCI Loans 3 2.79% 2.69% 2.39% 2.10% 2.27% 52 bps 2.74% 2.24% 50 bps Delinquency Rate (over 30 days) excluding PCI Loans 3 1.93% 1.97% 1.97% 1.79% 1.60% 33 bps 1.93% 1.60% 33 bps Delinquency Rate (over 90 days) excluding PCI Loans 3 0.88% 0.92% 0.87% 0.77% 0.71% 17 bps 0.88% 0.71% 17 bps Gross Principal Charge-off Dollars $645 $611 $548 $488 $505 $140 28% $1,256 $998 $258 26% Net Principal Charge-off Dollars $520 $489 $435 $370 $384 $136 35% $1,009 $756 $253 33% Net Interest and Fee Charge-off Dollars $110 $106 $94 $80 $84 $26 31% $216 $170 $46 27% Loans Delinquent Over 30 Days 3 $1,457 $1,445 $1,469 $1,269 $1,104 $353 32% $1,457 $1,104 $353 32% Loans Delinquent Over 90 Days 3 $667 $675 $652 $545 $491 $176 36% $667 $491 $176 36% Allowance for Loan Loss (period end) $2,384 $2,264 $2,167 $2,024 $1,949 $435 22% $2,384 $1,949 $435 22% Change in Loan Loss Reserves $120 $97 $143 $75 $28 $92 $217 $80 $137 Reserve Rate 3.06% 2.98% 2.80% 2.75% 2.71% 35 bps 3.06% 2.71% 35 bps Reserve Rate Excluding PCI Loans 3 3.11% 3.04% 2.86% 2.81% 2.77% 34 bps 3.11% 2.77% 34 bps CREDIT CARD LOANS Ending Loans $61,797 $59,757 $61,522 $58,006 $57,219 $4,578 8% $61,797 $57,219 $4,578 8% Average Loans $60,700 $60,122 $59,121 $57,561 $56,124 $4,576 8% $60,413 $56,124 $4,289 8% Interest Yield 12.66% 12.65% 12.62% 12.53% 12.42% 24 bps 12.66% 12.42% 24 bps Gross Principal Charge-off Rate 3.71% 3.61% 3.19% 2.93% 3.21% 50 bps 3.66% 3.18% 48 bps Net Principal Charge-off Rate 2.94% 2.84% 2.47% 2.17% 2.39% 55 bps 2.89% 2.37% 52 bps Delinquency Rate (over 30 days) 2.00% 2.06% 2.04% 1.87% 1.63% 37 bps 2.00% 1.63% 37 bps Delinquency Rate (over 90 days) 0.98% 1.03% 0.97% 0.86% 0.78% 20 bps 0.98% 0.78% 20 bps Gross Principal Charge-off Dollars $561 $535 $474 $425 $448 $113 25% $1,096 $887 $209 24% Net Principal Charge-off Dollars $445 $422 $369 $314 $334 $111 33% $867 $660 $207 31% Loans Delinquent Over 30 Days $1,237 $1,233 $1,252 $1,086 $933 $304 33% $1,237 $933 $304 33% Loans Delinquent Over 90 Days $603 $616 $597 $500 $444 $159 36% $603 $444 $159 36% Allowance for Loan Loss (period end) $1,980 $1,892 $1,790 $1,661 $1,603 $377 24% $1,980 $1,603 $377 24% Change in Loan Loss Reserves $88 $102 $129 $58 $13 $75 $190 $49 $141 Reserve Rate 3.21% 3.17% 2.91% 2.86% 2.80% 41 bps 3.21% 2.80% 41 bps Total Discover Card Volume $35,297 $32,406 $35,440 $33,471 $33,409 $1,888 6% $67,703 $63,413 $4,290 7% Discover Card Sales Volume $32,172 $29,134 $32,486 $30,683 $30,702 $1,470 5% $61,306 $58,254 $3,052 5% Rewards Rate 1.20% 1.25% 1.26% 1.20% 1.21% (1) bps 1.22% 1.14% 8 bps 1 Total Loans includes Home Equity and other loans 2 Purchased Credit Impaired ("PCI") loans are loans that were acquired in which a deterioration in credit quality occurred between the origination date and the acquisition date. These loans were initially recorded at fair value and accrete interest income over the estimated lives of the loans as long as cash flows are reasonably estimable, even if the loans are contractually past due. PCI loans are private student loans and are included in total loan receivables 3 Excludes PCI loans (described above) which are accounted for on a pooled basis. Since a pool is accounted for as a single asset with a single composite interest rate and aggregate expectation of cash flows, the past-due status of a pool, or that of the individual loans within a pool, is not meaningful. Because the Company is recognizing interest income on a pool of loans, it is all considered to be performing Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES LOAN STATISTICS (unaudited, in millions) Quarter Ended Six Months Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 Jun 30, 2017 Jun 30, 2016 2017 vs. 2016 PRIVATE STUDENT LOANS Ending Loans $8,916 $9,138 $8,977 $8,995 $8,725 $191 2% $8,916 $8,725 $191 2% Ending PCI Loans 1 $2,322 $2,449 $2,584 $2,708 $2,834 ($512) (18%) $2,322 $2,834 ($512) (18%) Interest Yield 7.45% 7.29% 7.06% 7.13% 7.13% 32 bps 7.37% 7.08% 29 bps Net Principal Charge-off Rate 0.85% 0.60% 1.00% 0.70% 0.74% 11 bps 0.72% 0.65% 7 bps Net Principal Charge-off Rate excluding PCI Loans 2 1.15% 0.83% 1.42% 1.02% 1.10% 5 bps 0.99% 0.98% 1 bps Delinquency Rate (over 30 days) excluding PCI Loans 2 2.12% 2.04% 2.22% 1.87% 1.88% 24 bps 2.12% 1.88% 24 bps Reserve Rate 1.78% 1.70% 1.74% 1.74% 1.73% 5 bps 1.78% 1.73% 5 bps Reserve Rate excluding PCI Loans 2 1.91% 1.80% 1.91% 1.92% 1.95% (4) bps 1.91% 1.95% (4) bps PERSONAL LOANS Ending Loans $6,955 $6,663 $6,481 $6,273 $5,708 $1,247 22% $6,955 $5,708 $1,247 22% Interest Yield 12.22% 12.18% 12.09% 12.23% 12.25% (3) bps 12.20% 12.23% (3) bps Net Principal Charge-off Rate 3.18% 3.16% 2.70% 2.63% 2.38% 80 bps 3.17% 2.41% 76 bps Delinquency Rate (over 30 days) 1.14% 1.12% 1.12% 0.98% 1.02% 12 bps 1.14% 1.02% 12 bps Reserve Rate 3.38% 3.10% 3.09% 2.98% 3.07% 31 bps 3.38% 3.07% 31 bps 1 Purchased Credit Impaired ("PCI") loans are loans that were acquired in which a deterioration in credit quality occurred between the origination date and the acquisition date. These loans were initially recorded at fair value and accrete interest income over the estimated lives of the loans as long as cash flows are reasonably estimable, even if the loans are contractually past due. PCI loans are private student loans and are included in total loan receivables 2 Excludes PCI loans (described above) which are accounted for on a pooled basis. Since a pool is accounted for as a single asset with a single composite interest rate and aggregate expectation of cash flows, the past-due status of a pool, or that of the individual loans within a pool, is not meaningful. Because the Company is recognizing interest income on a pool of loans, it is all considered to be performing Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES SEGMENT RESULTS (unaudited, in millions) Quarter Ended Six Months Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 Jun 30, 2017 vs. Jun 30, 2016 Jun 30, 2017 Jun 30, 2016 2017 vs. 2016 DIRECT BANKING Interest Income $2,338 $2,278 $2,258 $2,184 $2,090 $248 12% $4,616 $4,174 $442 11% Interest Expense 400 386 366 359 339 61 18% 786 673 113 17% Net Interest Income 1,938 1,892 1,892 1,825 1,751 187 11% 3,830 3,501 329 9% Other Income 408 375 401 408 396 12 3% 783 802 (19) (2%) Revenue Net of Interest Expense 2,346 2,267 2,293 2,233 2,147 199 9% 4,613 4,303 310 7% Provision for Loan Losses 639 594 579 445 411 228 55% 1,233 834 399 48% Total Other Expense 876 849 846 857 868 8 1% 1,725 1,719 6 % Income Before Income Taxes $831 $824 $868 $931 $868 ($37) (4%) $1,655 $1,750 ($95) (5%) Net Interest Margin 10.11% 10.07% 10.07% 10.00% 9.95% 16 bps 10.09% 9.94% 15 bps Pretax Return on Loan Receivables 4.34% 4.39% 4.62% 5.10% 4.93% (59) bps 4.36% 4.97% (61) bps Allowance for Loan Loss (period end) $2,377 $2,258 $2,151 $2,007 $1,932 $445 23% $2,377 $1,932 $445 23% Change in Loan Loss Reserves $119 $107 $144 $75 $27 $92 $226 $78 $148 PAYMENT SERVICES Interest Income $ $ $ $ $ $ NM $ $ $ NM Interest Expense NM NM Net Interest Income NM NM Other Income 73 72 65 68 69 4 6% 145 137 8 6% Revenue Net of Interest Expense 73 72 65 68 69 4 6% 145 137 8 6% Provision for Loan Losses 1 (8) (1) 1 -% (7) 2 (9) NM Total Other Expense 36 36 51 38 38 (2) (5%) 72 73 (1) (1%) Income Before Income Taxes $36 $44 $15 $30 $30 $6 20% $80 $62 $18 29% Note: See Glossary of Financial Terms for definitions of financial terms

DISCOVER FINANCIAL SERVICES GLOSSARY OF FINANCIAL TERMS Book Value per share represents total equity divided by ending common shares outstanding Capital Returned to Common Stockholders represents common stock dividends declared plus treasury share repurchases minus common stock issued under employee benefit plans and stock based compensation Common Equity Tier 1 Capital Ratio (Basel III transition) represents common equity tier 1 capital divided by risk weighted assets calculated under Basel III rules subject to transition provisions Common Equity Tier 1 Capital Ratio (Basel III fully phased-in) represents fully phased-in common equity tier 1 capital divided by risk weighted assets under fully phased-in Basel III rules. The Common Equity Tier 1 Capital Ratio (Basel III fully phasedin) is calculated using Basel III fully phased-in common equity tier 1 capital, a non-gaap measure. The Company believes that the common equity tier 1 capital ratio based on fully phased-in Basel III rules is an important complement to the existing capital ratios and for comparability to other financial institutions. For the corresponding reconciliation of common equity tier 1 capital and risk weighted assets calculated under fully phased-in Basel III rules to common equity tier 1 capital and risk weighted assets calculated under Basel III transition rules see the Reconciliation of GAAP to non-gaap data schedule Delinquency Rate (Over 30 Days) represents loans delinquent over thirty days divided by ending loans (total or respective loans, as appropriate) Delinquency Rate (Over 90 Days) represents loans delinquent over ninety days divided by ending loans (total or respective loans, as appropriate) Discover Card Sales Volume represents Discover card activity related to net sales Discover Card Volume represents Discover card activity related to net sales, balance transfers, cash advances and other activity Discover Network Proprietary Volume represents gross proprietary sales volume on the Discover Network Earnings Per Share represents net income allocated to common stockholders divided by the weighted average common shares outstanding Effective Tax Rate represents tax expense divided by income before income taxes Gross Principal Charge-off Rate represents gross principal charge-off dollars (annualized) divided by average loans for the reporting period Interest Yield represents interest income on loan receivables (annualized) divided by average loans for the reporting period Liquidity Portfolio represents cash and cash equivalents (excluding cash-in-process) and other investments Net Income Allocated to Common Stockholders represents net income less (i) dividends and accretion of discount on shares of preferred stock and (ii) income allocated to participating securities Net Interest Margin represents net interest income (annualized) divided by average total loans for the period. Net Principal Charge-off Rate represents net principal charge-off dollars (annualized) divided by average loans for the reporting period Operating Efficiency represents total other expense divided by revenue net of interest expense Payout Ratio represents capital returned to common stockholders divided by net income allocated to common stockholders Pretax Return on Loan Receivables represents income before income taxes (annualized) divided by total average loans for the period Proprietary Network Volume represents gross proprietary sales volume on the Discover Network Ratio of Earnings to Fixed Charges is a year-to-date statistic and represents income before income tax expense and fixed charges divided by fixed charges for the reporting period. Fixed charges are the sum of interest expense, amortized premiums, discounts and capitalized expenses related to indebtedness and an estimate of interest within rental expense for the reporting period Regulatory Capital Ratios are regulatory measures used to evaluate capital adequacy. Under Basel III, for a Bank Holding Company to be considered "well-capitalized," total risk-based and tier 1 risk-based capital ratios of 10% and 6% respectively must be maintained. Under Basel III, to meet the regulatory minimum a Bank Holding Company must maintain total risk-based, tier 1 risk-based, tier 1 leverage, and common equity tier 1 ratios of 8%, 6%, 4%, and 4.5% respectively. As of January 1, 2015 regulatory capital ratios are calculated under Basel III rules subject to transition provisions. Total Risk Based Capital Ratio represents total capital divided by risk-weighted assets. Tier 1 Capital Ratio represents tier 1 capital divided by risk-weighted assets. Tier 1 Leverage Ratio represents tier 1 capital divided by average total assets. The Tier 1 Common Capital Ratio has been replaced by the Common Equity Tier 1 Ratio under Basel III Reserve Rate represents the allowance for loan losses divided by total loans Return on Equity represents net income (annualized) divided by average total equity for the reporting period Rewards Rate represents rewards cost divided by Discover Card sales volume Tangible Assets represents total assets less goodwill and intangibles Tangible Common Equity ("TCE"), a non-gaap financial measure, represents total common equity less goodwill and intangibles. The Company believes TCE is a more meaningful measure to investors of the net asset value of the Company. For corresponding reconciliation of TCE to a GAAP financial measure, see Reconciliation of GAAP to Non-GAAP Data schedule Tangible Common Equity/Net Loans, a non-gaap measure, represents total common equity less goodwill and intangibles divided by total loans less the allowance for loan loss (period end) Tangible Common Equity per Share, a non-gaap measure, represents total common equity less goodwill and intangibles divided by ending common shares outstanding Tangible Common Equity/Tangible Assets, a non-gaap measure, represents total common equity less goodwill and intangibles divided by total assets less goodwill and intangibles Total Volume represents the transaction dollar volume from the PULSE network, Network Partners, Diners Club and proprietary Discover Network Undrawn Credit Facilities represents asset-backed conduit funding facilities and Federal Reserve discount window (excluding investments pledged to the Federal Reserve, which are included within the liquidity investment portfolio)

DISCOVER FINANCIAL SERVICES RECONCILIATION OF GAAP TO NON-GAAP DATA (unaudited, in millions) Quarter Ended Jun 30, 2017 Mar 31, 2017 Dec 31, 2016 Sep 30, 2016 Jun 30, 2016 GAAP Total Common Equity $10,699 $10,705 $10,763 $10,787 $10,837 Less: Goodwill (255) (255) (255) (255) (255) Less: Intangibles (164) (165) (166) (166) (167) Tangible Common Equity 1 $10,280 $10,285 $10,342 $10,366 $10,415 Common Equity Tier 1 Capital (Basel III Transition) $10,492 $10,501 $10,592 $10,618 $10,677 Adjustments Related To Capital Components During Transition 2 (25) (26) (52) (52) (53) Common Equity Tier 1 Capital (Basel III Fully Phased-in) $10,467 $10,475 $10,540 $10,566 $10,624 Common Equity Tier 1 Capital Ratio (Basel III Transition) 13.0% 13.4% 13.2% 13.9% 14.3% Common Equity Tier 1 Capital Ratio (Basel III Fully Phased-in) 3 13.0% 13.4% 13.2% 13.8% 14.2% GAAP Book Value Per Share $30.01 $29.46 $29.13 $28.62 $28.03 Less: Goodwill (0.68) (0.67) (0.67) (0.64) (0.62) Less: Intangibles (0.44) (0.43) (0.42) (0.42) (0.41) Less: Preferred Stock (1.49) (1.46) (1.44) (1.41) (1.38) Tangible Common Equity Per Share $27.40 $26.90 $26.60 $26.15 $25.62 1 Tangible Common Equity ("TCE"), a non-gaap financial measure, represents common equity less goodwill and intangibles. A reconciliation of TCE to common equity, a GAAP financial measure, is shown above. Other financial services companies may also use TCE and definitions may vary, so users of this information are advised to exercise caution in comparing TCE of different companies. TCE is included because management believes that common equity excluding goodwill and intangibles is a more meaningful measure to investors of the true net asset value of the Company 2 Adjustments related to capital components for fully phased-in Basel III include the phase-in of the intangible asset exclusion 3 Common Equity Tier 1 Capital Ratio (Basel III Fully Phased-in) is calculated using Common Equity Tier 1 Capital (Basel III Fully Phased-in), a non-gaap measure, divided by Risk Weighted Assets (Basel III Fully Phased-in) Note: See Glossary of Financial Terms for definitions of financial terms

2Q17 Financial Results July 26, 2017 1 2017 DISCOVER FINANCIAL SERVICES

The following slides are part of a presentation by Discover Financial Services (the "Company") in connection with reporting quarterly financial results and are intended to be viewed as part of that presentation. No representation is made that the information in these slides is complete. For additional financial, statistical, and business related information, as well as information regarding business and segment trends, see the earnings release and financial supplement included as exhibits to the Company s Current Report on Form 8-K filed today and available on the Company s website (www.discover.com) and the SEC s website (www.sec.gov). The information provided herein includes certain non-gaap financial measures. The reconciliations of such measures to the comparable GAAP figures are included at the end of this presentation, which is available on the Company s website and the SEC s website. The presentation contains forward-looking statements. You are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date on which they are made, which reflect management s estimates, projections, expectations or beliefs at that time, and which are subject to risks and uncertainties that may cause actual results to differ materially. For a discussion of certain risks and uncertainties that may affect the future results of the Company, please see "Special Note Regarding Forward-Looking Statements," "Risk Factors," "Business Competition," "Business Supervision and Regulation" and "Management s Discussion and Analysis of Financial Condition and Results of Operations" in the Company s Annual Report on Form 10-K for the year ended December 31, 2016, and under Management s Discussion and Analysis of Financial Condition and Results of Operations in the company s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017, which are filed with the SEC and available at the SEC's website (www.sec.gov). The Company does not undertake to update or revise forward-looking statements as more information becomes available. Notice 2

Vision Goal Focus areas and strategic objectives Invest for the future Build awareness and consideration Enhance capabilities and operating model Achieve profitable, disciplined growth Excel at serving our customers; simple, secure experience with deep relationships Offer differentiated products Leverage payments network Be the leading direct bank and payments partner Create long-term shareholder value Vision, Strategic Objectives and Goal Manage risk prudently 3

Delivered net income of $546MM, diluted EPS of $1.40 and 9% revenue growth YOY Achieved 8% total loan growth YOY with good momentum across all primary lending products (credit cards, private student and personal loans) Held the line on operating expenses, despite strong loan growth Remained disciplined on risk-adjusted returns with 19% return on equity Managed rewards rate lower (-1 bp YOY and -5 bps QOQ) Increased Payment Services volume rate of growth (up 12% YOY) Announced 2017-2018 capital plan, raising quarterly common dividend $0.05 to $0.35 per share and planning to purchase $2.23Bn of common shares over four quarters 2Q17 Highlights 4

Note(s) 1. Pre-tax, pre-provision income, which is derived by adding provision for loan losses to pre-tax income, is a non-gaap financial measure which should be viewed in addition to, and not as a substitute for, the Company s reported results. Management believes this information helps investors understand the effect of provision for loan losses on reported results and provides an alternate presentation of the Company s performance; see appendix for a reconciliation Highlights Diluted EPS of $1.40, down 5% YOY (2Q16 included a non- recurring tax benefit of $0.11 per share) Revenue net of interest expense of $2.4Bn, up 9% YOY, driven by higher net interest income Provision for loan losses increased $228MM YOY (55%) on higher net charge-offs and a reserve build Expenses rose just 1%, primarily from higher compensation and benefits 2Q17 Summary Financial Results B / (W) ($MM, except per share data) 2Q17 2Q16 $ Δ % Δ Revenue Net of Interest Expense $2,419 $2,216 $203 9% Net Principal Charge-off 520 384 (136) (35%) Reserve Changes build/(release) 120 28 (92) (329%) Provision for Loan Losses 640 412 (228) (55%) Operating Expense 912 906 (6) (1%) Direct Banking 831 868 (37) (4%) Payment Services 36 30 6 20% Total Pre-Tax Income 867 898 (31) (3%) Income Tax Expense 321 282 (39) (14%) Net Income $546 $616 ($70) (11%) ROE 19% 22% Diluted EPS $1.40 $1.47 ($0.07) (5%) Pre-Tax, Pre-Provision Income (1) $1,507 $1,310 $197 15% 5

Payment Services 2Q16 2Q17 $71.9 $57.2 $8.7 $5.7 $78.0 $61.8 $8.9 $7.0 +8% +8% +2% +22% Note(s) 1. Volume is derived from data provided by licensees for Diners Club branded cards issued outside of North America and is subject to subsequent revision or amendment Total Network Volume up 9% YOY Ending Loans ($Bn) Volume ($Bn) 2Q16 2Q17 $31.8 $33.9 $7.2 $3.7 $33.3 $38.8 $7.8 $3.5 Total Card Student Personal +5% +15% +8% (7%) Proprietary PULSE Network PartnersDiners (1) 2Q17 Loan and Volume Growth 6

Note(s) 1. Rewards cost divided by Discover card sales volume Highlights Net interest income of $1.9Bn, up 11% YOY on higher loan growth and modest NIM expansion Net discount and interchange revenue increased $13MM (5%) on increased card sales Rewards rate decreased 1 bp YOY, driven by lower promotional rewards 2Q17 Revenue Detail B / (W) ($MM) 2Q17 2Q16 $ Δ % Δ Interest Income $2,338 $2,090 $248 12% Interest Expense 400 339 (61) (18%) Net Interest Income 1,938 1,751 187 11% Discount/Interchange Revenue 666 636 30 5% Rewards Cost 388 371 (17) (5%) Net Discount/Interchange Revenue 278 265 13 5% Protection Products Revenue 56 59 (3) (5%) Loan Fee Income 83 79 4 5% Transaction Processing Revenue 42 39 3 8% Other Income 22 23 (1) (4%) Total Non-Interest Income 481 465 16 3% Revenue Net of Interest Expense $2,419 $2,216 $203 9% Direct Banking $2,346 $2,147 $199 9% Payment Services 73 69 4 6% Revenue Net of Interest Expense $2,419 $2,216 $203 9% Change ($MM) 2Q17 2Q16 QOQ YOY Discover Card Sales Volume $32,172 $30,702 10% 5 % Rewards Rate (1) 1.20% 1.21% -5 bps -1 bp 7

Highlights Net interest margin on receivables increased 17bps YOY on higher card yield and portfolio mix, partially offset by higher charge-offs and funding costs Credit card yield increased 24bps YOY as the prime rate increased, partially offset by higher interest charge-offs Average consumer deposits grew 11% YOY and composed 47% of total average funding Funding costs on interest-bearing liabilities increased 16bps YOY, driven by higher market rates and funding mix 2Q17 Net Interest Margin 2Q17 2Q16 ($MM) Average Balance Rate Average Balance Rate Credit Card $60,700 12.66% $56,124 12.42% Private Student 9,020 7.45% 8,816 7.13% Personal 6,820 12.22% 5,608 12.25% Other 314 5.59% 262 5.04% Total Loans 76,854 11.98% 70,810 11.72% Other Interest-Earnings Assets 15,175 1.11% 14,562 0.71% Total Interest-Earnings Assets $92,029 10.19% $85,372 9.84% Direct to Consumer and Affinity $36,956 1.29% $33,215 1.22% Brokered Deposits and Other 15,600 2.07% 14,740 1.78% Interest Bearing Deposits 52,556 1.52% 47,955 1.39% Borrowings 26,122 3.09% 24,621 2.82% Total Interest-Bearing Liabilities $78,678 2.04% $72,576 1.88% Change (%) 2Q17 QOQ YOY Total Interest Yield 11.98% 4bps 26bps NIM on Receivables 10.11% 4bps 17bps NIM on Interest-Earning Assets 8.44% 14bps 19bps 8

Note(s) 1. Defined as reported total operating expense divided by revenue net of interest expense 2. 2Q16 operating efficiency ratio adjusted for $12 million in look back related anti-money laundering remediation expenses. Management believes adjusted operating efficiency, which is a non-gaap measure, helps investors understand the effect of activities that are not expected to continue and provides investors with a useful metric to evaluate the company s ongoing operating performance; see appendix for a reconciliation Highlights Employee compensation and benefits up 8% YOY, primarily on higher staffing levels driven by increased compliance headcount Information processing down 13% YOY, primarily from infrastructure efficiencies Operating efficiency improved 320 bps on expense discipline and completion of certain AML projects 2Q17 Operating Expense Detail B / (W) ($MM) 2Q17 2Q16 $ Δ % Δ Employee Compensation and Benefits $367 $340 ($27) (8%) Marketing and Business Development 192 198 6 3% Information Processing & Communications 77 89 12 13% Professional Fees 156 150 (6) (4%) Premises and Equipment 23 23 0 % Other Expense 97 106 9 8% Total Operating Expense $912 $906 ($6) (1%) Direct Banking 876 868 ($8) (1%) Payment Services 36 38 2 5% Total Operating Expense $912 $906 ($6) (1%) Operating Efficiency(1) 37.7% 40.9% 320 bps Adjusted Operating Efficiency(2) 37.7% 40.3% 260 bps 9

Total Company Loans Credit Card Loans Private Student Loans Personal Loans NCO rate (%) 30+ day DQ rate ex-pci (%) 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 2.14 2.05 1.85 2.02 2.11 2.18 2.02 2.31 2.60 2.71 1.57 1.49 1.60 1.67 1.64 1.60 1.79 1.97 1.97 1.93 NCO rate (%) 30+ day DQ rate (%) 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 2.40 2.28 2.04 2.18 2.34 2.39 2.17 2.47 2.84 2.94 1.64 1.55 1.65 1.72 1.68 1.63 1.87 2.04 2.06 2.00 NCO rate (%) 30+ day DQ rate (%) 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 2.22 2.10 1.99 2.28 2.45 2.38 2.63 2.70 3.16 3.18 0.76 0.71 0.80 0.89 0.97 1.02 0.98 1.12 1.12 1.14 NCO rate (%) 30+ day DQ rate ex-pci (%) 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 0.61 0.61 0.57 0.82 0.56 0.74 0.70 1.00 0.60 0.85 1.66 1.78 1.88 1.91 1.92 1.88 1.87 2.22 2.04 2.12 Credit Performance Trends Revised 2017 NCO guidance: 2.7-2.8% 10

2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 102 95 93 95 94 99 99 104 108 14.5 14.4 13.9 14.3 14.3 13.9 13.2 13.4 13.0 Capital Trends Note(s) 1. Common Equity Tier 1 Capital Ratio (Basel III Transition) 2. Payout Ratio is displayed on a trailing twelve month basis. This represents the trailing twelve months Capital Return to Common Stockholders divided by the trailing twelve months Net Income Allocated to Common Stockholders Common Equity Tier 1 Capital Ratio(1) (%) Payout Ratio(2) (%) 11

Profitability Net income of $546MM and diluted EPS of $1.40 Revenue growth of 9% on higher net interest income NIM of 10.11%, up 17bps YOY Return on equity remains strong at 19% Efficiency ratio improved 3pp YOY to 38% 2Q17 Financial Summary 12 Total loans grew 8% ($6.1Bn) YOY with strong contributions from all primary lending products Credit card loans grew 8% ($4.6Bn) YOY as sales volume increased 5% Average consumer deposits grew 11% ($3.7Bn) YOY as deposit rates increased slightly Total NCO rate of 2.71%, up 53 bps YOY Driven by supply- induced credit normalization and loan seasoning Revised 2017 guidance to 2.7-2.8% Capital plan announced for 3Q17-2Q18: Raised quarterly common dividend $0.05 to $0.35/share Planned gross share repurchases of $2.23Bn Balance Sheet Credit and Capital

Appendix 13

Note(s) 1. Pre-tax, pre-provision income, which is derived by adding provision for loan losses to pre-tax income, is a non-gaap financial measure which should be viewed in addition to, and not as a substitute for, the Company's reported results. Management believes this information helps investors understand the effect of provision for loan losses on reported results and provides an alternate presentation of the Company's performance 2. Adjusted operating efficiency, which is a non-gaap measure, helps investors understand the effect of activities that are not expected to continue and provides investors with a useful metric to evaluate the company s ongoing operating performance Reconciliation of GAAP to Non-GAAP Data (unaudited, $MM) 2Q17 2Q16 Provision for loan losses $640 $412 Income before income taxes 867 898 Pre-tax, pre-provision income(1) $1,507 $1,310 Revenue net of interest expense $2,419 $2,216 Total operating expense 912 906 Excluding anti-money laundering and related compliance program expenses 12 Adjusted operating expense $912 $894 Adjusted Operating Efficiency(2) 37.7% 40.3% 14