BIN Sponsorship
BIN (Bank Identification Number) sponsorship is the arrangement by which a sponsor bank provides a non-bank entity access to card network BINs, enabling the non-bank to issue cards under the bank's BIN registration with Visa or Mastercard.
Every payment card has a BIN — the first 6–8 digits that identify the issuing bank. To issue cards, a non-bank needs access to a BIN sponsored by a bank that is a member of Visa or Mastercard. BIN sponsorship is the mechanism that makes non-bank card issuing possible.
How it works: the sponsor bank maintains the card network membership and BIN registration; the fintech or platform issues cards under the bank's BIN through a card issuing processor (Marqeta, Galileo, Lithic); the economics (interchange) flow to the platform based on the program agreement.
BIN economics: the BIN structure determines the interchange rate category for cards issued under it. Commercial card BINs typically carry higher interchange than consumer BINs. B2B virtual card BINs are specifically designed to maximize interchange on business-to-business payments.
BIN selection is an important but often overlooked architecture decision — the BIN determines interchange economics, card program capabilities, and international acceptance.