The Card Issuers Bidding for Citi's PartnersNarrow moat

Citigroup (C) — moat facet

Citi's card rivals compete for the partner rather than the cardholder, and each renewal is an auction.

In cards the competition is not for the cardholder but for the partner. Citi says its co-branding and private-label agreements "generally have a fixed term"1, and that "Competition among credit card issuers, including Citi, for these relationships is significant"2. It adds that it "may not be able to maintain such relationships on existing terms or at all"3.

U.S. credit card spend volume ($bn)159Q2 2025152Q1 2026176Q2 2026Citigroup Q2 2026 earnings release
Spend up 11% in a year.

A retailer or airline changing issuer takes its customers with it. The cards carry the partner's name; the cardholder may never think of Citi at all. So when a contract comes up, rival issuers bid with larger revenue shares and signing payments, and the winner pays for the portfolio.

Citi has been on the winning side recently. In April 2026 it completed the purchase of an additional American Airlines co-brand portfolio of about $6.6 billion of loans, and it is the airline's exclusive card-issuing partner4. The price shows in the segment's accounts: non-interest revenue fell to minus $659 million in the second quarter of 2026 on higher partner payment accruals and new account costs5.

The price of winning shows in the full year. Rewards and partner payments were $12,075 million in 2025 against interchange of $9,718 million6, about 1.24 times7.

Citi expects the field to consolidate. Its annual report says mergers "involving traditional financial services companies, such as regional banks or credit card issuers, as well as networks and merchant acquirers, may also increase competition"8. A larger rival can bid more for a partner.

Citi is bidding to keep and add partners. Its Investor Day plan is to "Consistently refresh and launch new Citi branded products and expand key co-brand partner relationships in USCC"9, and the chief executive said U.S. Personal Banking, the segment that held the cards before the April 2026 recast, "doubled its returns" in 202510.

This rivalry sets the economics of Citi's card business. If partner payments kept rising faster than card spending, the auctions would be transferring the profit to the partners.

Moat trajectory: Holding steady

Won the American Airlines portfolio in 2026; partner payments rising.

The number that tests this moat
Reported
U.S. credit card spend volume, latest quarter
$176bn (Q2 2026), up 11% year on year

The spending the partner contracts deliver; growth below that of partner payments would mean the auctions were moving the profit to the partners.

Source: Citigroup Q2 2026 earnings release, Wealth and Cards ↗
References
  1. ReportedCiti says its co-branding and private-label agreements "generally have a fixed term", and that "Competition among credit card issuers, including Citi, for these relationships is significant".
    Citigroup Form 10-K for fiscal 2025 - risk factors, competition, the 2020 consent orders, transformation spending and the card-partner concentration disclosure. — FY2025 · publ. 20 February 2026 · source ↗
  2. ReportedCiti says its co-branding and private-label agreements "generally have a fixed term", and that "Competition among credit card issuers, including Citi, for these relationships is significant".
    Citigroup Form 10-K for fiscal 2025 - risk factors, competition, the 2020 consent orders, transformation spending and the card-partner concentration disclosure. — FY2025 · publ. 20 February 2026 · source ↗
  3. ReportedIt adds that it "may not be able to maintain such relationships on existing terms or at all".
    Citigroup Form 10-K for fiscal 2025 - risk factors, competition, the 2020 consent orders, transformation spending and the card-partner concentration disclosure. — FY2025 · publ. 20 February 2026 · source ↗
  4. ReportedIn April 2026 it completed the purchase of an additional American Airlines co-brand portfolio of about $6.6 billion of loans, and it is the airline's exclusive card-issuing partner.
    Citigroup Form 10-Q for the quarter ended 30 June 2026 - results, capital, the $30 billion repurchase program, dividends, staff, U.S. Consumer Cards partners and the American Airlines portfolio. — Q2 2026 · publ. 6 August 2026 · source ↗
  5. ReportedThe price shows in the segment's accounts: non-interest revenue fell to minus $659 million in the second quarter of 2026 on higher partner payment accruals and new account costs.
    Citigroup second-quarter 2026 earnings release, Form 8-K exhibit 99.1 - Wealth and U.S. Consumer Cards results and key metrics. — Q2 2026 · publ. 14 July 2026 · source ↗
  6. ReportedRewards and partner payments were $12,075 million in 2025 against interchange of $9,718 million, about 1.24 times.
    Citigroup Historical Quarterly Financial Data Supplement 2021-2025 recast to the first-quarter 2026 segments - Wealth and U.S. Consumer Cards: revenue by line, client balances, net new investment assets, branches, loans, credit losses and returns. — FY2021-FY2025 · publ. 3 April 2026 · source ↗
  7. Moat Explorer calcRewards and partner payments were $12,075 million in 2025 against interchange of $9,718 million, about 1.24 times.
    Moat Explorer calculation from Citigroup segment figures ($ millions unless stated; calendar years; segments as restated in the 8-K of 3 April 2026). Services: cross-border transaction value 416.4 / 279.5 - 1 = 49.0%, about half; U.S. dollar clearing 177.1 / 146.2 - 1 = 21.1%; fee revenue 6,385 / 4,967 - 1 = 28.5%, about 29%; net interest income 15,001 / 6,866 = 2.18 times, about 2.2; NII share 15,001 / 22,636 = 66.3%, about 66%; revenue 22,636 / 12,539 - 1 = 80.5%, about 81%; TTS 16,646 / 9,187 - 1 = 81.2%; Securities Services 5,990 / 3,352 - 1 = 78.7%, about 79%; Securities Services revenue over assets under custody 5,990 / 31,400,000 = 0.019%, about 1.9 hundredths of a percent; international share 15,729 / 22,636 = 69.5%, about 69%; share of Citi revenue 22,636 / 85,225 = 26.6%, about 27% (2025), 12,539 / 71,574 = 17.5%, about 18% (2021). Deposits: year-end 1,308,681 / 1,365,954 - 1 = -4.2%, about 4%. U.S. Consumer Cards: revenue 18,258 / 13,209 - 1 = 38.2%, about 38%; net interest income over average loans 20,169 / 170,000 = 11.9%, about 12 cents per dollar; Q2 2026 net credit losses over net interest income 1,850 / 5,180 = 35.7%, about 36%, more than a third; share of Citi revenue 18,258 / 85,225 = 21.4%, about 21%. Markets: rates and currencies 11,749 / 22,409 = 52.4%, about 52%; fixed income 16,745 / 22,409 = 74.7%, about 75%; international 14,020 / 22,409 = 62.6%, about 63%; revenue 18,888 / 20,401 - 1 = -7.4%, about 7%; net income 4,059 / 6,148 - 1 = -34.0%, about a third; revenue 22,409 / 19,108 - 1 = 17.3%, about 17%; share of Citi revenue 22,409 / 85,225 = 26.3%, about 26%. Allocated average TCE 2025 ($bn): Services 33.0 + Markets 53.5 + Banking 9.2 + Wealth 15.4 + U.S. Consumer Cards 20.3 + All Other 39.2 = 170.6; Markets 53.5 / 170.6 = 31.4%, about 31%; All Other 39.2 / 170.6 = 23.0%, about 23%, nearly a quarter. Banking: corporate lending and other 6,384 - 4,618 = 1,766, about $1,766 million; share of Citi revenue 6,384 / 85,225 = 7.5%. Wealth: Citigold and Retail Banking 7,666 / 11,272 = 68.0%, about 68%; Wealth at Work 930 / 11,272 = 8.3%, about 8%; revenue 11,272 / 9,871 - 1 = 14.2%, about 14%; 11,272 / 9,733 - 1 = 15.8%, about 16%; share of Citi revenue 11,272 / 85,225 = 13.2%, about 13%. All Other: revenue on the chart basis 4,442 managed + (176) reconciling items = 4,266 (2025); 9,491 - 670 = 8,821 (2021); 8,841 + 854 = 9,695 (2022); 9,389 + 1,346 = 10,735 (2023); 7,521 + 26 = 7,547 (2024); Corporate/Other 4,442 - 5,512 Legacy Franchises = -1,070, about minus $1,070 million. Further: All Other chart basis 4,266 / 8,821 = 0.48, about half; Banking 2025 income new basis 935 / old basis 2,324 = 0.40, so 60% less, about three-fifths; Mexico consumer and small business 6,500 / 4,539 - 1 = 43.2%, about 43%; U.S. card loans 170 / 409 consumer loans = 41.6%, about two-fifths; card loans excluding the American Airlines purchase (177 - 168 - 6.6) / 168 = 1.4%; Q1 2026 card net credit losses over net interest income 1,742 / 5,116 = 34.0%, about 34%; Q2 2026 equities over fixed income 2,301 / 4,706 = 0.49, about half; investment banking fees 4,618 / 2,713 - 1 = 70.2%, about 70%; Citigold (old basis) 4,953 / 3,803 - 1 = 30.2%, about 30%; net new investment assets first half 2026 15 + 16 = 31 billion; Wealth Q2 2026 efficiency 2,377 / 3,177 = 74.8%, about 75%; Securities Services 5,990 / 5,165 - 1 = 16.0%, about 16%. More: commercial card spend 71.2 / 38.6 - 1 = 84.5%, about 84%; advisory share of investment banking fees 1,908 / 4,618 = 41.3%, about 41%; advisory share of Q2 2026 investment banking revenue 390 / 1,548 = 25.2%, about 25%; BlackRock mandate 80 / 670 investment assets = 11.9%, roughly 12%; rewards and partner payments over interchange 12,075 / 9,718 = 1.24 times; new card accounts 5,376 / 2,942 - 1 = 82.7%, about 83%. Five-business income from continuing operations 2025: 8,187 + 6,265 + 935 + 1,178 + 3,409 = 19,974; Services 8,187 / 19,974 = 41.0%, about 41%, more than two-fifths. — FY2021-Q2 2026 · publ. September 2026 · source ↗
    Method: Arithmetic on figures reported in Citigroup's recast historical supplement, Forms 10-K and 10-Q and its Q2 2026 earnings release; operands shown in the source line.
  8. ReportedIts annual report says mergers "involving traditional financial services companies, such as regional banks or credit card issuers, as well as networks and merchant acquirers, may also increase competition".
    Citigroup Form 10-K for fiscal 2025 - risk factors, competition, the 2020 consent orders, transformation spending and the card-partner concentration disclosure. — FY2025 · publ. 20 February 2026 · source ↗
  9. ReportedIts Investor Day plan is to "Consistently refresh and launch new Citi branded products and expand key co-brand partner relationships in USCC", and the chief executive said U.S. Personal Banking, the segment that held the cards before the April 2026 recast, "doubled its returns" in 2025.
    Citigroup 2026 Investor Day financial overview presentation - RoTCE targets, business targets for Services, Cards and Markets, efficiency ratio, transformation, liquidity and capital. — May 2026 · publ. May 2026 · source ↗
  10. ReportedIts Investor Day plan is to "Consistently refresh and launch new Citi branded products and expand key co-brand partner relationships in USCC", and the chief executive said U.S. Personal Banking, the segment that held the cards before the April 2026 recast, "doubled its returns" in 2025.
    Citigroup fourth-quarter and full-year 2025 earnings release, Form 8-K exhibit 99.1 - the 2025 payout ratio, the RoTCE commitment for 2026 and the chief executive's comments. — FY2025 · publ. 14 January 2026 · source ↗
Sources
Generated September 28, 2026