What is PayFi? Payment finance and its yield explained

PayFi, short for payment finance, puts the money sitting inside payment flows to work onchain, either by financing payments before they settle or by earning yield on card, settlement and payroll balances until the moment they're spent.

PayFi (payment finance) is the use of stablecoins and smart contracts to earn a return on money while it moves through a payment system. It covers two jobs: financing a payment before it settles, such as advancing cash against an invoice or a cross-border transfer, and earning yield on the balances that payment companies hold between receiving money and paying it out. Both rest on the time value of money, and both have grown with stablecoins, which reached a supply of $312.8 billion on 24 September 2026, according to DefiLlama.

Most explanations of PayFi stop at receivables financing. The larger pool is float: card balances waiting for settlement, prefunded settlement accounts in payment corridors, and payroll money held between funding and payday. Visa said on 8 September 2026 that stablecoin settlement on its network had passed a $20 billion annualized run rate, with more than 160 stablecoin-linked card programs live (The Block), and each of those programs holds a balance that can earn until a cardholder spends it.

What does PayFi mean?

The term was popularised in 2024. CoinGecko credits Lily Liu, president of the Solana Foundation, with coining it, and Huma Finance, a payment-financing protocol, has written about the idea on its own blog. Liu describes PayFi as new financial markets built around the time value of money. Money that is available today can earn during the one to three days a card or bank payment takes to settle, and traditional payment rails leave that gap to banks and card networks.

In practice the label covers any product where payment activity and yield or credit meet onchain. That includes invoice and trade financing, prefunding for cross-border payouts, stablecoin cards that earn on the spending balance, and credit lines secured by card settlement receivables. What unites them is that the underlying cash flow comes from real payments, where most DeFi yield comes from trading, lending to other traders or staking.

How does PayFi work?

There are two flows, one for each job. The financing flow turns a future payment into something a lender can fund today:

1. A business is owed money. A merchant has an unpaid invoice, a payment company has a transfer to deliver, or a card program has settlement receivables from the network.
2. The claim is recorded onchain. The receivable is tokenized or registered in a smart contract, with payment data from the business or an oracle.
3. A lender funds it. A liquidity pool or vault advances stablecoins against the claim, usually at a discount or for a fee.
4. The business gets paid early. The merchant or payment company receives cash in minutes instead of waiting days or weeks.
5. The payment settles and the lender is repaid. When the end customer or network pays, the contract repays the lender with its return.

The float flow runs the other way. A payment company holds a balance it will owe out later, deposits it into a yield-bearing position, and withdraws the exact amount at the moment a payment goes out. The first flow earns from borrowers who need cash early, and the second earns from wherever the balance is deployed, such as lending markets or Treasury-backed assets.

Where do payment balances sit, and how long?

Float builds up in the gap between when money arrives and when it leaves, and each type behaves differently. Our explainer on how card programs earn yield on customer float sizes the card case in detail.

A treasury team can keep this money in a bank account or a money market fund, though both run on banking hours and take a day or more to move. Stablecoin balances earn around the clock, a difference that counts most for card programs, where a withdrawal has to clear before a purchase is approved.

How does a card balance earn yield until the moment of purchase?

The pattern is called atomic redemption: the yield-bearing position is redeemed and the merchant is paid in the same blockchain transaction, so the balance earns until the second it's spent. Upshift builds this as its Atomic Redemption Vault, an ERC-4626 vault with an instant-settlement module, used for PayFi products where deposits flow straight to a card. Its documentation sets out the redemption in five steps, all inside one transaction:

1. Request: the card program or payment app asks to redeem a set amount. No queue entry is created.
2. Price: the vault reads its oracle and calculates the amount owed at current value, rejecting a stale or out-of-bounds price.
3. Liquidity recall: if the vault's working reserve is short, it withdraws the difference from Aave and Morpho lending positions, which allow same-transaction withdrawal.
4. Risk checks: rate limits, fee caps and spread limits are checked, and a request that breaks them is rejected.
5. Settle: the shares are burned and the stablecoin is paid out. If any step fails, the whole transaction reverts.

For programs that need working capital on top, Visa and Credit Coop have built a stablecoin revolving credit line secured by card settlement receivables, sized from Visa's daily settlement files, which is the financing flow applied to cards. Through its parent August Digital, which has originated more than $800 million in loans, Upshift pairs its vaults with credit facilities for the same purpose.

Where does PayFi yield come from?

PayFi yield has to come from someone paying for money. Section 4(a)(11) of the GENIUS Act bars permitted stablecoin issuers from paying holders interest, so the payer is a borrower, a business or a fund further down the chain (Pub. L. 119-27).

For reference, tokenized Treasury funds averaged a 7-day yield of 3.52% on 24 September 2026 (rwa.xyz). Huma Finance lists cross-border payment financing, trade finance and marketplace payouts as its sources of yield and reports more than $18 billion in cumulative transaction volume on its homepage. Anything paying well above Treasury yields is taking credit, liquidity or strategy risk to get there.

What can go wrong with PayFi?

The risks follow the two flows. On the financing side, the main one is that the payment behind a receivable never arrives, and a lender's loss depends on how the pool is structured and who absorbs defaults first. Huma reports 0% credit default across more than three years, a figure the protocol publishes about itself.

On the float side, the main risk is a liquidity mismatch. A balance that must be available at the moment of a card tap can't sit in a position with a multi-day withdrawal queue, so a program that confuses a vault with a queue for cash can find itself short on a busy spending day. The balance also carries the stablecoin's own peg risk, covered in our guide to stablecoin depegs, plus smart contract and oracle risk in every contract the money passes through. Rules on who may pass yield to end users are still settling, which is why our explainer on the GENIUS and CLARITY Acts tracks the distributor question.

Always make sure to do your own research and be aware of the above and any other risks before depositing.

PayFi vs TradFi vs DeFi

Why use PayFi instead of PayPal or a bank?

The three reasons are speed, cost and the yield on idle money. Stablecoin payments settle around the clock, including weekends, while bank transfers wait for business hours. The World Bank put the average global remittance fee at about 6.5% in 2024, and Brookings estimates the on and off-ramp cost of stablecoin transfers at roughly 1% to 3% (Brookings, April 2026), a gap that is widest in corridors with little bank competition. A payment company that holds float in a bank usually earns what the bank chooses to pay, while the same float held as stablecoins can be deployed on the company's own terms.

PayPal and banks still win on reach and consumer protection. Most people are paid and billed in bank money, so every PayFi product needs reliable on and off-ramps to be useful.

Is PayFi only for companies, or can regular people use it?

Most PayFi volume is business to business, since receivables financing and payment float are corporate activities. Consumers reach it through products built on top: stablecoin cards that earn on the spending balance and neobank earn accounts. The consumer usually never deals with the vault or lending pool directly; the card program or app does, and the product's terms decide how much of the yield reaches the user.

How big is PayFi?

No agreed market size exists yet, because PayFi overlaps with stablecoin payments, card programs and onchain credit. The dated figures that do exist, as of 24 September 2026:

• Stablecoin supply: $312.8 billion (DefiLlama).
• Visa stablecoin settlement: above a $20 billion annualized run rate, more than 15 times a year earlier, with over 160 stablecoin-linked card programs live (Visa, 8 September 2026).
• Huma Finance: more than $18 billion in cumulative transaction volume, as reported by Huma.
• Forecast: EY-Parthenon estimates stablecoins could carry 5% to 10% of cross-border payments by 2030, or $2.1 to $4.2 trillion, cited by Brookings in April 2026.

Visa's own figures show how fast stablecoin settlement on card rails has grown. The network reported a stablecoin settlement run rate above $2.5 billion at the end of September 2025 in its annual report, above $3.5 billion at the end of November when it launched USDC settlement in the US, $7 billion in late April 2026 when it announced adding five blockchains, and above $20 billion in September.

Upshift provides the vault layer for these products, with more than 50 vaults across more than 30 chains, 10 smart contract audits by 6 independent firms and more than 66,000 users. Our guide to how neobanks and fintechs offer stablecoin yield covers the distribution side.

Frequently asked questions

What does PayFi stand for?

PayFi stands for payment finance. It describes financial products built on payment flows, such as financing receivables before they're paid or earning yield on balances that sit in payment systems.

Who coined the term PayFi?

Lily Liu, president of the Solana Foundation, is credited with coining PayFi in 2024. Huma Finance, a payment-financing protocol, helped spread it.

Can I use PayFi today?

Yes. Stablecoin cards that earn on the spending balance, receivables-financing pools and cross-border payout services using stablecoins are all live, though many consumer products aren't available in the US or EU yet.

Does PayFi use real money?

PayFi runs on stablecoins, which are redeemable one-for-one for dollars or euros, and connects to bank accounts through on and off-ramps. The yield comes from real payment activity and lending, and it varies over time.

Is PayFi yield guaranteed?

No. Returns depend on borrowers repaying, on lending rates and on Treasury yields, and the money is exposed to smart contract, stablecoin and liquidity risk.

What is an atomic redemption vault?

It's a vault that redeems a position and pays out in one blockchain transaction, with no withdrawal queue. Card programs use it so balances earn yield until the moment of purchase.

Keep reading

• How card programs earn yield on customer float. Sizing the buffer and the deployable balance.
• Best crypto cards that earn real yield on your balance. The consumer products using this pattern.
• How companies earn yield on treasury cash. The corporate side of idle balances.