Debit sponsorship drove modern BaaS
Anthony Peculic, Head of Cards at Cross River Bank, on building a fintech one-stop shop
This point matters because debit sponsorship was the original template for modern BaaS. Long before fintechs talked about embedded finance, sponsor banks were already letting nonbanks launch prepaid and debit programs by renting access to a bank charter, BIN sponsorship, compliance, and network connections. What changed later was not the core structure, but the number of products layered on top, from credit to lending to real time money movement.
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In practice, the old debit model meant a fintech could avoid becoming a bank, plug into a sponsor bank, and issue cards through processors and card networks. That setup made prepaid and debit the easiest place for sponsorship to take hold first, because the economics were straightforward and the product was simpler than credit.
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The money engine was interchange. Small sponsor banks under the $10B asset threshold could earn higher debit interchange under the Durbin exemption, then share that economics with program managers, processors, and fintech partners. That made debit programs especially attractive and explains why early BaaS concentrated there.
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The newer wave extends the same skeleton into a broader stack. Cross River describes the market moving from prepaid debit and fragmented vendors toward a one stop shop that combines cards, accounts, payments, lending, and compliance. That is why companies like Marqeta, Unit, Bond, and Synctera sit adjacent to sponsor banks rather than replacing them.
The next phase is sponsor banks capturing more of the stack instead of just supplying the charter in the background. As fintech products converge around debit, credit, lending, and instant payouts, the winners will be the banks and platforms that can package compliance, money movement, and card issuing into one system that is faster to launch and harder to leave.