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- SoFi Bank has started using SoFiUSD to settle Mastercard debit and credit card transactions, moving the system from a March agreement into live use.
- More than $25 billion refers to expected annualized card-processing volume, not the amount of SoFiUSD in circulation or direct consumer stablecoin spending.
- The structure puts a bank-issued stablecoin behind familiar card payments while leaving the checkout experience largely unchanged.
SoFi has put its own stablecoin behind a card program expected to process more than $25 billion annually, giving one of the clearest examples yet of blockchain moving into traditional payment infrastructure without requiring consumers to change how they pay.
SoFi Bank has begun settling debit and credit card transactions with SoFiUSD across Mastercard’s global payments network and is migrating its full card program to the new system. The companies describe SoFi as the first U.S. national bank to go live with stablecoin settlement across Mastercard.
The distinction between payments and settlement is crucial. Customers still use ordinary cards, while merchants do not need to accept a cryptocurrency at checkout. SoFiUSD operates deeper in the payment stack, changing how value moves after card transactions rather than replacing the card itself.
That also puts the headline number in context: $25 billion is expected annualized card volume, not $25 billion of stablecoins moving onchain.
What Actually Changes When a Card Payment Settles in SoFiUSD
A card transaction involves more than the moment a customer taps or swipes a card. Funds ultimately have to move between the financial institutions participating in the payment network.
SoFiUSD introduces a blockchain-based asset into that settlement process.
The token is issued by SoFi Bank, N.A., a U.S. national bank regulated by the Office of the Comptroller of the Currency. SoFi says it is designed to be redeemable 1:1 for dollars and is primarily backed by cash. The stablecoin itself is not a bank deposit, is not FDIC-insured and is not legal tender, an important distinction from the deposits held by customers at the bank.
That structure differs from the model used by many major stablecoins. SoFi is both a regulated national bank and the institution issuing the token used in its settlement infrastructure, rather than relying on an unrelated stablecoin issuer to provide the digital settlement asset.
SoFi’s broader business-banking infrastructure supports 24/7 movement in fiat and SoFiUSD, as well as minting and burning the stablecoin when funds move between conventional dollars and the blockchain environment.
For merchants and other businesses, the practical benefit is therefore less about “accepting crypto” and more about gaining access to settlement outside conventional banking windows.
The $25 Billion Number Needs a Different Denominator
The scale of the card portfolio makes the launch notable, but annual transaction volume cannot be compared directly with stablecoin supply.
A dollar of SoFiUSD does not have to be created for every dollar of annual card spending. Settlement assets can be transferred, redeemed and reused, allowing the same pool of liquidity to support repeated transactions.
That means SoFiUSD supply, settlement turnover and card volume measure different things.
If the program processes $25 billion over a year, the average is roughly $68.5 million of card volume per day.
That calculation does not tell us how much SoFiUSD must be outstanding because actual liquidity requirements depend on settlement frequency, netting, transaction timing and how quickly tokens are redeemed or recycled.
This is where the next layer of evidence becomes important. A genuine measure of adoption would combine the card volume with observable SoFiUSD supply and onchain settlement activity rather than treating the $25 billion headline as stablecoin transaction volume.
A National Bank Is Controlling Both Sides of the Conversion
SoFiUSD was launched in December 2025 as a stablecoin intended for payment and financial infrastructure. SoFi said at launch that the reserves would be maintained 1:1, primarily in cash, while the bank would provide the infrastructure for institutional partners to integrate the token into their own settlement flows.
The model has since expanded beyond the token itself.
SoFi launched Big Business Banking in April, combining regulated business deposit accounts with API-based payments and digital-asset functionality. The platform is expected to leverage Solana alongside other blockchain networks, although the companies have not publicly identified a specific blockchain in the September announcement as the exclusive rail for the live Mastercard card settlement.
That limitation matters. It would be premature to describe the $25 billion program itself as running specifically on Ethereum, Solana or another named network without transaction-level evidence or confirmation from the companies.
What is documented is the architecture around it: SoFi can connect bank deposits with the minting and burning of SoFiUSD while operating the banking relationship and stablecoin infrastructure inside the same broader institution.
Mastercard Is Building for More Than One Stablecoin
The SoFi deployment also sits inside a larger change to Mastercard’s settlement model.
The card network has been expanding settlement beyond traditional business-day cycles to include stablecoins and additional intraday, weekend and holiday options. Its strategy is not tied exclusively to SoFiUSD, making the SoFi program an implementation of a broader multi-asset settlement architecture rather than a proprietary Mastercard digital currency.
The relationship also has room to expand beyond SoFi’s own cards.
When the companies announced their partnership in March, they said Galileo, SoFi’s financial technology platform, was expected to offer card clients and their issuing banks the option to settle with SoFiUSD. They also identified cross-border remittances, B2B transfers and other money-movement applications as potential uses.
SoFi has since expanded SoFiUSD’s reach elsewhere. Earlier in September, Payward agreed to list the token on Kraken and join SoFi’s real-time settlement network, adding another institutional route for the stablecoin beyond Mastercard.
The Next Test Is Usage, Not Announced Volume
Moving a card portfolio with more than $25 billion in expected annualized processing volume onto stablecoin settlement gives SoFiUSD a substantial potential use case. It does not yet show how intensively the token itself will be used.
The next useful measurements are different: circulating SoFiUSD supply, observable settlement activity, turnover of that supply and adoption outside SoFi’s own card portfolio.
Galileo will be particularly important. If other issuing banks and payment clients begin choosing SoFiUSD for settlement, the token would move beyond an internal banking rail and start functioning as infrastructure distributed through SoFi’s technology business.
That is the more consequential test of the September launch. The card volume establishes scale. What happens to SoFiUSD supply and third-party adoption will show whether a bank-issued stablecoin can turn that scale into a broader settlement network.
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