⚠ The Exclusive Deals the Other Network HoldsModerate threat

Mastercard (MA) — threat to the moat

The banks that have signed exclusive contracts with Visa are simply not available to Mastercard until those contracts end.

Mastercard's filing is candid that some of the best customers are not available. While Mastercard has exclusive or nearly exclusive relationships with certain customers, other customers have similar relationships with competitors, which may make it difficult or cost-prohibitive to do significant business with them1.

Share of Visa + Mastercard US purchase volume, 2025 (%)Visa70.38%Mastercard29.62%Nilson Report 2025; Mastercard share calculated
The portfolios locked to the larger network are most of the market.

Exclusivity is how the rebate war is settled for a period: a bank takes a large payment and commits most of its volume to one network. When the larger network holds more such contracts in a market, the smaller one competes for what remains. In the United States, Mastercard carried about 29.6% of the two networks' purchase volume in 20252.

These contracts rarely become public, so the risk is hard to size. What can be seen is the result: Mastercard's United States volume grew 6.3% in 2025, against 6.8% for Visa3.

The competition for exclusivity is fought portfolio by portfolio, and Mastercard's filing describes it that way: it competes for business on the basis of individual portfolios or programs, and continues to face intense competitive pressure on the prices it charges issuers and acquirers4. It also notes that some customers issue American Express-, China UnionPay- or Discover-branded cards alongside its own5. A bank can split its cards among several brands, but an exclusive commitment to a rival removes most of its volume from the auction for the length of the contract.

The indicator here is the gap between the two networks' American volume growth. A persistent shortfall would say exclusive deals are shutting Mastercard out of the portfolios that grow fastest.

References
  1. ReportedWhile Mastercard has exclusive or nearly exclusive relationships with certain customers, other customers have similar relationships with competitors, which may make it difficult or cost-prohibitive to do significant business with them.
    Mastercard Form 10-K for fiscal 2025 - Item 1 business: the network, competition, tokenization, account-based payments and human capital. — FY2025 · publ. 11 February 2026 · source ↗
  2. Moat Explorer calcIn the United States, Mastercard carried about 29.6% of the two networks' purchase volume in 2025.
    Moat Explorer calculation from Mastercard's reported figures ($ millions unless stated). Gross payment network assessments 2025: 11,029 + 12,021 + 15,930 + 1,018 = 39,998; rebates 20,522 / 39,998 = 51.3%; 2024: 10,245 + 10,181 + 13,602 + 936 = 34,964, 17,629 / 34,964 = 50.4%; 2023: 15,182 / (15,824 + 15,182) = 49.0%; 2022: 8,794 + 6,597 + 10,646 + 766 = 26,803, 12,445 / 26,803 = 46.4%; 2021: 10,476 / (11,943 + 10,476) = 46.7%. Q2 2026: 5,997 / (5,451 + 5,997) = 52.4%; gross assessments growth (5,451 + 5,997) / (4,945 + 5,997 / 1.22) - 1 = about 16%. Old basis: 3,980 / 13,647 = 29.2% (2015); 8,315 / 23,616 = 35.2% (2020). Rebates 20,522 / 3,980 = 5.2 times; net revenue 32,791 / 9,667 = 3.4 times. Rebates against gross revenue 2025: 20,522 / (32,791 + 20,522 = 53,313) = 38.5%; Visa 15,751 / (40,000 + 15,751 = 55,751) = 28.3%; difference 20,522 - 15,751 = 4,771. US share: 2,958 / (2,958 + 7,028) = 29.6%; four networks 2,958 / 11,463 = 25.8%; Amex and Discover 11,463 - 9,986 = 1,477, 1,477 / 11,463 = 12.9%. Outside the US 100% - 29% = 71%. Cross-border assessments 12,021 / 3,498 = 3.4 times; cross-border volume fees 3,512 / 5,606 - 1 = -37.4%; 12,021 x 0.37 = 4,448. Services share of net revenue: 5,404 / 15,301 = 35.3% (2020); 6,941 / 18,884 = 36.8%; 7,879 / 22,237 = 35.4%; 9,274 / 25,098 = 37.0%; 10,832 / 28,167 = 38.5%; 13,315 / 32,791 = 40.6% (2025); 3,826 / 9,277 = 41.2% (Q2 2026); payment network 19,476 / 32,791 = 59.4%. Growth: payment network 11,943 / 9,897 - 1 = 21%, 14,358 / 11,943 - 1 = 20%, 15,824 / 14,358 - 1 = 10%, 17,335 / 15,824 - 1 = 10%, 19,476 / 17,335 - 1 = 12%; 19,476 / 9,897 = 2.0 times; services 7,879 / 6,941 - 1 = 14% (2022), 13,315 / 5,404 = 2.5 times; growth gap Q2 2026 20% - 10% = 10 points; acquisitions 3 / 23 = 13%. Operating margin: 5,078 / 9,667 = 52.5% (2015); 6,622 / 12,497 = 53.0% (2017); 7,282 / 14,950 = 48.7% (2018); 9,664 / 16,883 = 57.2% (2019); 8,081 / 15,301 = 52.8% (2020); 12,264 / 22,237 = 55.2% (2022). Headcount 39,800 / 13,400 = 3.0 times; net revenue 32,791 / 12,497 = 2.6 times (2017-2025). Capital spending 489 + 726 = 1,215; 1,215 / 32,791 = 3.7%; free cash flow 17,648 - 1,215 = 16,433; returned 11,727 + 2,756 = 14,483, 14,483 / 16,433 = 88%. Net debt 30 June 2026: 2,459 + 22,184 - 11,291 = 13,352. Diluted shares 906 / 1,137 - 1 = -20.3%; EPS 16.52 / 3.35 = 4.9 times, (16.52 / 3.35)^(1/10) - 1 = 17.3% a year; net income 14,968 / 3,808 = 3.9 times; net revenue (32,791 / 9,667)^(1/10) - 1 = 13.0% a year. Year-end P/E (market value over net income): 109.31 / 3.808 = 28.7 (2015); 160.24 / 3.915 = 40.9 (2017); 301.24 / 8.118 = 37.1 (2019); 353.05 / 8.687 = 40.6 (2021); 334.33 / 9.930 = 33.7 (2022); 483.30 / 12.874 = 37.5 (2024); 512.65 / 14.968 = 34.2 (2025); earnings yield 1 / 31.13 = 3.2%. Litigation provision against net income: 504 / 14,968 = 3.4%; 539 / 11,195 = 4.8%; 680 / 12,874 = 5.3%. Tax: pre-tax income 2025 14,968 + 3,610 = 18,578; (19.4% - 15.6%) x 18,578 = about 706. Amortised incentives 2,098 / 19,476 = 10.8%. Five-customer net revenue 6.9 bn. BVNK 1,500 / 11,727 = 13% of 2025 buybacks; acquisitions since 2020 809 + 861 + 325 + 2,700 + 1,500 = 6,195, 1,500 / 6,195 = 24%. Recorded Future 2,700 / 14,968 = 18%. Commercial gross dollar volume 1,405 / 10,632 = 13.2%. Property, equipment and right-of-use assets 1,168 + 1,135 = 2,303 - revenue mix, margins, geography and competitors. — 2015-2026 · publ. September 2026 · source ↗
    Method: Arithmetic on figures reported in Mastercard's Forms 10-K, 10-Q, results releases, the Visa 10-K and the Nilson Report; operands shown in the source line.
  3. Third-party estimateWhat can be seen is the result: Mastercard's United States volume grew 6.3% in 2025, against 6.8% for Visa.
    The Nilson Report, Mastercard and Visa Cards in the US - 2025: purchase volume $7.028 trillion on Visa and $2.958 trillion on Mastercard. — 2025 · publ. 2026 · source ↗
  4. ReportedThe competition for exclusivity is fought portfolio by portfolio, and Mastercard's filing describes it that way: it competes for business on the basis of individual portfolios or programs, and continues to face intense competitive pressure on the prices it charges issuers and acquirers.
    Mastercard Form 10-K for fiscal 2025 - Item 1 business: the network, competition, tokenization, account-based payments and human capital. — FY2025 · publ. 11 February 2026 · source ↗
  5. ReportedIt also notes that some customers issue American Express-, China UnionPay- or Discover-branded cards alongside its own.
    Mastercard Form 10-K for fiscal 2025 - Item 7 MD&A: net revenue by category, key metrics, rebates, geography and the five largest customers. — FY2025 · publ. 11 February 2026 · source ↗
Sources
Generated September 25, 2026