Scale Compresses Banking Stack Economics
Fintech Fastlane: The Unit Economics of the Banking-as-a-Service Toll Road
Compression at the bottom means scale shifts bargaining power to the company that owns the end customer, not the bank or middleware. In practice, once a fintech is pushing enough card volume, it can ask the sponsor bank and BaaS provider for a better split because replacing a few basis points is cheaper than losing the whole program. That is why bank economics can fall from roughly 20 to 30 basis points to 2 to 3, while the fintech keeps most of the upside.
-
The money flows upward because the fintech creates the spend. The merchant pays interchange, the network takes around 50 basis points, the bank starts around 20 basis points, and the remaining pool is negotiated between the BaaS layer and the fintech. At maturity, the fintech often takes the largest share because it owns customer acquisition, deposits, and transaction growth.
-
This is why Marqeta style economics can look strong on volume but weaker on rate. Marqeta's take rate fell from about 0.7% in 2019 to 0.5% in 2020 as large customers gained leverage, but revenue still grew with rising payment volume. Bigger customers squeeze margin per transaction while still making the processor larger in absolute dollars.
-
Fintech customers compress the stack more than embedded finance customers do. A company like Ramp or Klarna is built to monetize interchange directly, so every extra basis point matters in negotiation. An embedded finance user like Instacart cares more about issuing cards to make a workflow work, so pricing pressure is usually less intense even if the product is still mission critical.
Over time, the winning infrastructure providers are likely to be the ones that can survive lower take rates by owning more of the stack, automating compliance and support, and serving many mid sized programs before they become giants. The category keeps growing, but more of the economics will accrue to customer owning fintechs, while banks and pure infrastructure layers become higher volume and lower margin businesses.