Banking-as-a-service

Definition

Banking-as-a-service (BaaS) is a model where a software company embeds deposit accounts, money movement, and often cards inside its product without holding a bank charter. A chartered sponsor bank holds the deposits (or FBO structures) and the regulatory relationship. Middleware or the bank’s own APIs expose accounts, ACH, wires, and related rails. The customer-facing brand can be the software company’s. The bank is still the bank. This page does not invent a license you can buy. BaaS is a program structure, not a charter.

This page is the embedded-accounts model. Adjacent terms are Vertical Fintech’s. They are not this page. Sponsor bank (who holds the charter), BIN sponsor (who holds the card BIN), KYB (who you board), and card issuing sit next to this definition.

Why it matters

If you run vertical software and want to hold balances, not only take a card rate, BaaS is the usual path. You put accounts and payouts in the product your merchants already use. You do not become a bank. That is also the constraint. The sponsor bank underwrites the program, sets KYC and KYB bars, can pause rails, and is named on deposit disclosures. Some vendors are middleware in front of several banks. Some listings are the bank itself selling APIs. Ask which bank is on the account, whether production keys wait on bank diligence, and what happens to balances if you change vendors. There is no public self-serve charter on this page. If the job is only card checkout, you are still on payments, not BaaS.

Related on Vertical Fintech

• Banking: Embedded accounts, wallets, and treasury for platforms that want to hold balances, not only move card volume.
• Sponsor bank: The chartered bank every BaaS program still needs.
• Unit: Accounts and wallets inside the product without a charter. Partner banks. Not a bank and not a PayFac.
• Treasury Prime: Partner-bank deposit accounts and rails through one API, with a direct bank relationship. Treasury Prime does not hold the charter.
• Column: The national bank that owns the charter and offers accounts and rails through its own APIs. Bank, not middleware.

FAQ

Does banking-as-a-service make my company a bank?

No. The chartered sponsor bank is the bank. You are a software platform or program manager on that bank’s program. Deposit insurance, where it applies, sits with the bank. Confirm the named bank on contracts and customer disclosures.

Is every banking API banking-as-a-service?

No. Some listings are middleware in front of partner banks. Some are the bank selling its own APIs. Both can embed accounts in vertical software. The diligence path and who holds the charter are different. Read the listing for who is the bank.