Interchange: The Invisible Two Percent Tax That Funds Your Credit Card Points

The Fee in Every Price Tag

Tap a credit card for 100 dollars and the merchant does not receive 100 dollars. Roughly 2 to 3 dollars evaporates into the payment system, and the largest slice, interchange, flows to the bank that issued your card, typically about 1.5 to 2.5 percent on credit cards depending on the card\'s tier and the merchant\'s category. The fee schedule is set by the networks, Visa and Mastercard, though they keep none of interchange itself, earning separate, smaller assessment fees for routing the transaction. Because merchants price their goods to cover all costs, interchange lives inside every price tag in the economy, unnoticed by the customers who ultimately fund it, which is precisely the design.

Why the Fee Exists, and Why It Grew

The system\'s defenders can point at real costs. The issuing bank fronts the money instantly, eats the fraud under zero liability rules, funds an interest free loan until your statement settles, and runs the underwriting and servicing machinery. Interchange compensates that stack, and in its absence card acceptance might cost merchants through other channels. But the fee\'s size is set by a strange competition that runs upward. Networks compete for banks to issue their cards, and the recruiting pitch is higher interchange, which is why premium rewards cards carry the highest fees, the points are financed directly out of the interchange the card generates. The result is the industry\'s open secret, the rewards arms race and the merchant fee burden are the same phenomenon viewed from opposite ends of the transaction.

The Regulatory and Legal Battlefield

Fees this large attract law, and the map matters for any payments analyst. US debit interchange has been capped since the Durbin Amendment, at roughly 21 cents plus a sliver, which is why debit rewards died a decade ago and why banks under the cap pushed customers toward credit. Credit interchange remains uncapped federally, defended by the banks and networks against perennial legislation, most prominently the repeatedly reintroduced Credit Card Competition Act, which would force large banks to enable a second, cheaper network on each card. Merchants meanwhile fight through litigation, the decades long antitrust war against the networks has produced multibillion dollar settlements and, more practically, the right to surcharge credit transactions, which is why checkout screens increasingly quote a card price and a cash discount. Europe simply capped credit interchange outright years ago, at 0.3 percent, and the region\'s thinner rewards cards show exactly what American cards would become under similar rules.

Why Fintech Circles This Pool

Interchange is also the quiet revenue engine of consumer fintech. The neobanks this site profiles separately earn much of their income from debit interchange, exempted from the Durbin cap by a carve out for small banks, which is why every fintech card is issued by a small partner bank you have never heard of. The BNPL providers covered in our installment economics article exist partly to route around interchange with their own merchant fee. And the embedded finance platforms this site describes upstream all take their cut from the same river. When you model any consumer payments company, the first question is always the same, whose interchange, at what rate, through which regulatory carve out, and what happens to the model if the carve out closes.

The Bottom Line

Interchange is a one and a half to two and a half percent private tax on card commerce, set by networks competing to recruit banks, rebated to consumers as points, embedded invisibly in retail prices, and litigated perpetually by the merchants who remit it. It funds the rewards ecosystem, much of consumer fintech, and a river of bank fee income, while quietly taxing cash customers to pay for lounge access they will never use. Every payments business you will ever analyze is, at bottom, an argument about who keeps a slice of that river.