Co-Brand: When the Client Is an AirlineNarrow moat

The largest consumer card portfolios in the world are co-brands — an airline, a hotel group or a retailer whose customers carry a card that earns its loyalty currency, issued by a bank, running on a network. Costco's American card programme is one of them, which is a useful reminder of how large a single such arrangement can be.

These deals matter because they invert the usual hierarchy. The commercial partner brings the customers and the loyalty economics. The bank brings the balance sheet and the underwriting. The network brings an incentive bid drawn from the $15,751 million Visa paid its clients in fiscal 2025¹. The network is chosen last, competes hardest, and contributes the part of the package that is most easily substituted — which is why the incentive bid is the element that moves most in a renewal negotiation.

They are also where the largest single blocks of volume sit. Visa cannot lose a client worth ten percent of revenue because no such client exists, but a major co-brand portfolio moving to the other network is large enough to be visible in a quarter's numbers, and those moves do happen.

The trend to watch is whether co-brand partners keep gaining share of the negotiation. Every year that loyalty currency matters more to the cardholder than the card network does, the party holding the currency holds more of the leverage.