Latest / Pricing Power Podcast with Fexingo: How Businesses Set Prices, Raise Margins, and Win Customers / How Mastercard Sets Its Interchange Fees
Transcript
- Lucas: Every time you tap your credit card to buy a coffee, a silent pricing engine kicks in — one that touches almost every transaction in the modern economy, yet most people have never heard of it. Luna: You're talking about interchange fees, right? The cut that banks and card networks take from every swipe. Lucas: Exactly. Interchange is the fee that a merchant's bank pays to the cardholder's bank whenever a credit or debit card is used. It's set by the networks — Mastercard, Visa, Discover, Amex — and it's the single biggest component of what merchants pay to accept cards. On average, it's about 1.5 to 3.5 percent of the transaction value. Luna: So for a $4 latte that's anywhere from 6 to 14 cents. Doesn't sound huge per cup, but multiply that by all the coffee sold in a day and it adds up fast. Lucas: Right. And here's where the pricing power question gets interesting. Mastercard doesn't lend money or issue cards itself. It's a network — a platform that connects thousands of banks, millions of merchants, and hundreds of millions of cardholders. Its whole business is setting the rules for how those parties interact, including the interchange rates. Luna: It's a classic two-sided market. More cardholders attract more merchants, and more merchants attract more cardholders. The trick is keeping both sides happy while extracting a fee from each transaction. Lucas: And the way they balance it is by varying interchange rates based on the type of card and the type of transaction. A basic debit card swipe might cost the merchant 0.2 percent. But a premium rewards credit card — say, a Chase Sapphire Reserve used online — can cost 2.5 percent or more. The higher fee essentially pays for the rewards the cardholder gets. Luna: So merchants end up subsidizing airline miles and cashback bonuses. That's one reason some small businesses hate premium cards. Lucas: If these conversations have moved your work forward in some small way, one of the simplest things you can do is support the show directly. We keep it ad-free because listener support covers the hosting and production costs — it's just a way to keep this independent. Luna: Yeah, it really does make a difference. If you've gotten value from an episode like this, you can head to buy me a coffee dot com slash fexingo. Lucas: And any contribution goes straight into making more deep-dive episodes. Now, back to the interchange puzzle — because the real pricing power lies in the 'honor all cards' rule. Luna: Right — that's the rule that says if a merchant accepts Mastercard, they have to take every Mastercard, no matter how high the interchange fee. Lucas: Precisely. You can't say 'I accept debit and standard credit but not the ultra-premium World Elite card that costs me 3 percent.' It's all or nothing. That rule is the backbone of the network's pricing power. It forces merchants to accept the most expensive cards if they want to accept the cheapest ones. Luna: And that effectively raises the average interchange fee across the board. There's data showing that the average effective merchant discount rate — that's the total fee including interchange — has stayed stubbornly around 2 percent even as technology costs have fallen. Lucas: That's the pricing power in action. Mastercard and Visa collectively processed over $10 trillion in transactions globally last year. Even a tiny increase in the average interchange rate translates into billions in additional network revenue. And they've been able to keep rates high partly because of the network effect — no single merchant can walk away. Luna: But some have tried. Back in 2023, Amazon threatened to stop accepting Visa cards in the UK after a fee dispute. They eventually backed down, but it showed that even the biggest merchants feel trapped. Lucas: That was a revealing moment. Amazon has leverage that most merchants don't — they're one of the largest retailers in the world. And even they couldn't get better terms. For a small boutique, the fees are essentially non-negotiable. Luna: So where does regulation come in? I know the Durbin Amendment capped debit interchange for big banks at 0.05 percent plus 21 cents. That cut debit fees roughly in half. Lucas: Durbin was a huge deal — it saved merchants about $8 billion a year. But it only applies to debit cards. Credit card interchange remains largely unregulated in the US. In Europe, regulators capped both debit and credit interchange at 0.2 percent for debit and 0.3 percent for credit. That's crushed network revenues there. Luna: And that's why Mastercard and Visa have been pushing new products like 'tap to pay' and value-added services for banks. They need to offset the lost interchange income in regulated markets. Lucas: Exactly. In Europe, their average revenue per transaction dropped significantly after the caps, so they've diversified into fraud prevention, data analytics, and consulting services for merchants. The pricing power just shifted from interchange to those ancillary services. Luna: Let's talk about the most recent regulatory push here. The Fed proposed lowering the debit interchange cap further in 2023 — down to 0.04 percent plus 14.4 cents. Where does that stand? Lucas: As of mid-2026, the proposal is still being debated. Banks and networks have pushed back hard, arguing that lower interchange would force them to eliminate free checking and rewards on debit. Merchants say the current cap is still too high relative to processing costs. The outcome is uncertain, but it's the most significant threat to the network model since Durbin. Luna: If the cap goes through, it would cut debit interchange revenue for big banks by roughly 30 percent. Mastercard and Visa would lose some fee income, but they'd likely raise credit card fees to compensate — or push more volume to credit, where interchange is higher. Lucas: That's the wild card. The networks have an incentive to steer consumers toward credit cards if debit becomes less profitable. And merchants might actually end up paying more overall if credit card volume grows as a share of transactions. Luna: So the pricing power is resilient. Even when regulators cap one channel, the network finds another. It reminds me of how airlines responded to fee regulation by unbundling ancillaries. Lucas: Great parallel. The network's real asset isn't any particular fee structure — it's the installed base of terminals, the brand trust, and the rulebook that governs billions of transactions. That's hard to replicate. New entrants like PayPal and Square have tried to build alternative payment rails, but they mostly route over existing networks. Luna: There is one emerging threat though: real-time payment systems like FedNow and UPI in India. Those bypass card networks entirely and settle at near-zero cost. If they gain traction in the US, that could erode the network's pricing power over time. Lucas: That's the big question for the next decade. FedNow launched in 2023, but adoption is still slow — banks are hesitant to cannibalize their own interchange revenue. In India, UPI now handles over 10 billion transactions a month, and card networks have seen their share shrink. But the US is a different beast — credit is deeply embedded in consumer behavior. Luna: So the pricing power of Mastercard and Visa rests on a kind of inertia. Consumers love rewards, merchants can't afford to stop accepting cards, and the network effect protects the toll booth. Lucas: And that's why interchange fees are such a fascinating pricing story. It's not about a product with a clear cost — it's a platform setting a tax on every transaction, justified by the value of ubiquity. The fee is high because the alternative — not being in the network — is worse. Luna: I wonder if we'll look back at interchange fees in ten years the way we look at landline roaming charges today — a relic of a pre-digital era. Lucas: Maybe. But given the networks' track record of adapting, I'd bet they find a new toll to charge before the old one disappears.