Visa and Mastercard interchange fees cost U.S. merchants $111 billion in 2024 at an average swipe fee of 2.35%, which exceeds most retailers' net profit margins -- and the 20-year lawsuit settlement only caps rates for 8 years before they can rise again

U.S. merchants paid over $111 billion in credit card interchange fees to Visa and Mastercard in 2024, with the average swipe fee at 2.35% per transaction. For most retailers operating on net margins of 1-3%, credit card processing fees represent their second or third largest operating expense after labor and rent. A November 2025 settlement would reduce average interchange fees by only 0.10 percentage points and cap certain standard consumer credit card rates at 1.25% -- but only for 8 years. Why it matters: a 2.35% average swipe fee on a business with 2% net margins means the payment processing cost alone nearly equals total profit, so small and mid-size retailers who lack negotiating leverage pay the highest effective rates (often 2.5-3.5%), so these merchants cannot practically refuse cards because 80%+ of consumer transactions are now card-based, so the settlement's 0.10% reduction is marginal relief that still leaves fees far above the 0.2-0.3% interchange caps mandated in the EU, so the 8-year rate cap creates a regulatory cliff after which Visa and Mastercard can raise rates again, so merchants face permanent structural extraction with no long-term resolution. The structural root cause is a two-sided market failure: Visa and Mastercard compete for issuing banks by offering higher interchange fees (which fund cardholder rewards), not for merchants. Merchants cannot refuse cards without losing customers, creating inelastic demand that the networks exploit. The duopoly controls ~80% of U.S. card transaction volume, and the 'honor all cards' rule (only partially relaxed in the settlement) prevents merchants from steering customers to lower-cost payment methods.