The Toll Nobody Who Pays It ChoseWide moat

This is the part of the model that explains the margin, and it is not the network effect.

Follow the money on a single card payment. The merchant pays a merchant discount fee. The great majority of that goes to the bank that issued the card, as interchange. A smaller portion goes to the acquiring bank. A very small portion — a few basis points — goes to Visa. On $13.9 trillion of payments volume Visa kept $40.0 billion¹, about twenty-nine basis points, while the interchange flowing to issuers over the same volume was several times larger and never appeared on Visa's income statement at all.

Now look at who decided. The cardholder chose which card to present and paid nothing; frequently they were rewarded for choosing, out of the fee the merchant is objecting to. The merchant paid and had no say — under long-standing network rules it generally had to accept the card if it accepted the brand, and its freedom to steer the customer somewhere cheaper has been the subject of four decades of litigation. The issuer, which receives the largest share, is Visa's actual customer and is being paid to prefer it.

A price set by a party who does not pay it, charged to a party who cannot refuse it, and mostly remitted to a party being courted for its loyalty. Every unusual feature of this business descends from that sentence, including the ones that look like virtues. The fee is stable because nobody who could negotiate it has any interest in lowering it. The margin is high because the cost of collection is trivial. And the litigation is permanent because the party paying has no other lever.

It also explains why two enormous networks have competed for fifty years without a price war. Cutting the merchant fee would win Visa no cardholders, because cardholders never see it. It would however reduce the interchange that issuers receive — and issuers decide whose logo goes on the card. Price competition in this market runs backwards: the way to win is to pay the distributor more. That is precisely what client incentives are.

So the fee to merchants holds and the payments to banks rise. Client incentives grew 14% in fiscal 2025 against 11% net revenue growth, and have outgrown revenue in most of the past decade. That is the price of the arrangement, and it is the honest measure of whether the network's power belongs to Visa or is being rented from the banks that distribute it.

The reason this facet is rated wide despite being the most attacked is that the attacks have consistently failed to change the shape. Europe capped interchange in 2015 and the networks adapted and grew. The United States capped debit interchange and mandated routing choice, and Visa's revenue compounded through it. What both did was compress the *issuers'* economics, which is a slower and more indirect route to the same place — and it is the route to watch, because a bank that earns less per swipe has less reason to market the card and more reason to demand a bigger incentive.