Regular Mastercard cards have begun to be settled via a digital dollar: a US bank is transitioning over $25 billion a year in flows to a stablecoin

American SoFi Bank has begun settling its Mastercard debit and credit cards through its own digital dollar, SoFiUSD. For the cardholder, nothing changes on the outside: they still pay with a regular Mastercard in stores or online. But after a purchase, part of the money movement between financial participants now happens via blockchain.

SoFi has already launched such transactions in a production environment and is gradually transitioning the bank's entire card program to the new scheme. Its expected annual volume exceeds $25 billion.

This is one of the most telling examples of how stablecoin technologies are moving beyond crypto exchanges and being integrated into familiar banking infrastructure so seamlessly that the customer may not even notice their use.

What exactly SoFi did

On September 22, SoFi and Mastercard announced that SoFiUSD settlements are already working for SoFi Bank's debit and credit card program.

SoFi calls itself the first nationally licensed US bank to launch stablecoin settlements within Mastercard's global payment network.

It's important to fully grasp the scale of the news. More than $25 billion is not the amount that has already passed through blockchain. It is the expected annual volume of SoFi's entire card program after its transition to the new settlement model.

Individual transactions are already going through blockchain, and the migration of the entire program continues.

The buyer pays in dollars — the stablecoin appears later

The new system does not turn a regular Mastercard into a cryptocurrency card.

Imagine a SoFi customer buys groceries and pays with a card. The terminal confirms the operation in the usual way, the merchant sees the payment in dollars, and the buyer is not required to purchase SoFiUSD or open a crypto wallet.

Changes happen at the next stage — during final settlement between participants in the payment system.

This is where SoFi can use SoFiUSD instead of exclusively traditional banking mechanisms for moving money.

Therefore, for the mass user this technology is almost invisible. The stablecoin works not instead of the card, but inside the infrastructure that moves money after the purchase is made.

Why change a system that already works

The buyer sees the money move instantly. In practice, the message about successful payment and the final financial settlement are different processes.

After a purchase, banks, the payment network and other participants must finally settle mutual obligations.

The traditional settlement system can depend on banking operating hours, weekends and existing payment infrastructure.

Blockchain allows a digital equivalent of dollars to be transferred around the clock, so the main potential advantage is not a new function for the buyer, but faster money management for banks and businesses.

SoFi says that through its Big Business Banking platform, merchants can receive funds directly into a SoFi Bank account and convert them to regular dollars around the clock, without building their own infrastructure for holding stablecoins.

What is SoFiUSD

SoFiUSD is a stablecoin whose value is pegged to the US dollar.

It is issued by SoFi Bank, N.A. — a nationally licensed American bank regulated by the Office of the Comptroller of the Currency.

According to the company, SoFiUSD can be redeemed 1:1 for dollars, and its reserves consist primarily of cash.

But there is an important nuance here: the very fact that the token is issued by a regulated bank does not make SoFiUSD an ordinary bank deposit.

SoFi explicitly warns that SoFiUSD is not a deposit, is not insured by the FDIC or SIPC, is not guaranteed by the bank or the government, is not legal tender and could theoretically lose value.

For an ordinary cardholder, these features may remain unnoticeable since they do not need to buy or hold SoFiUSD themselves to pay with Mastercard.

Why $25 billion changes the scale of the experiment

Stablecoin settlements have been tested in the payment industry for several years. But many early projects were limited to individual companies, pilot operations or special crypto products.

SoFi has a different scale: the bank is moving its entire debit and credit card program to blockchain settlement.

It is the expected volume of over $25 billion per year that turns the project from a small technology demonstration into a working part of the card business.

For Mastercard, this is also an important test. If the model proves convenient for banks and companies, stablecoins could become an additional settlement layer within the existing global payment system.

This is not the same as paying with Bitcoin

Crypto cards have been around for a long time, but they usually work differently.

In the classic model, the customer holds Bitcoin, Ethereum or another digital currency, and at the time of purchase the asset is converted into regular money that the merchant receives.

SoFi's system does not require the customer to own cryptocurrency.

The consumer can hold dollars, make a regular card purchase and not even know that a stablecoin was used in subsequent settlements between financial institutions.

That is why the current launch may prove more significant in terms of mass adoption of the technology: blockchain is being embedded into an already familiar financial product instead of persuading millions of people to switch to a new payment method.

Mastercard is preparing infrastructure for several stablecoins at once

SoFiUSD is just one element of Mastercard's broader strategy.

This summer, the payment company announced expanded settlement capabilities using regulated stablecoins.

The list includes Circle's USDC, PYUSD, USDG and USDP issued by Paxos, Ripple's RLUSD and SoFiUSD.

Mastercard plans to support such settlements on multiple blockchains, including Ethereum, Solana, Polygon, Base, Arbitrum and XRP Ledger.

For payment networks, this is a potentially important change. If banks begin to move settlements ever more actively to blockchain infrastructure, Mastercard needs to maintain its role as the link between banks, merchants and various digital assets.

Back in spring, this was only a plan

SoFi and Mastercard announced their partnership back in March 2026.

At that time, the companies talked about the intention to use SoFiUSD for card settlements, international transfers and business-to-business payments.

The difference is that the system is already working now.

SoFi reports that real transactions are going through blockchain, and the entire card portfolio is being transitioned to the new scheme.

Thus, in a few months the project went from a statement of intent to a working banking product.

Settlements for large companies may be the next step

SoFi does not intend to limit the use of SoFiUSD to its own bank cards.

The company says it is already discussing stablecoin settlements with major American enterprises — from international retail chains to technology platforms. Their names have not been disclosed as of yet.

Together with Mastercard, the bank is also exploring the use of SoFiUSD for cross-border payments, remittances and other operations.

International settlements are considered one of the most obvious directions for stablecoin technology, since blockchain networks can operate around the clock and allow a different organization of money movement between countries.

What will change for the ordinary Mastercard holder

For now — practically nothing.

A SoFi cardholder does not need to understand blockchain, buy digital tokens or choose a special payment method. They continue to use their Mastercard debit or credit card as before.

The main changes happen in the part of the payment system invisible to the buyer.

And that is what makes the SoFi launch especially interesting. A stablecoin ceases to be a separate crypto product and becomes a technology that can work inside an everyday bank payment.

If this approach spreads, digital dollars may arrive in everyday settlements not through new wallets and crypto cards, but unnoticeably — via the same bank cards that people already use every day.

Based on materials from: SoFi Technologies, Mastercard, Mastercard — stablecoin settlement.