Money in cross-border transfers is almost always sitting somewhere waiting. The sender has already parted with the funds, the recipient has not yet received them, and between them are prefunded accounts held with correspondent banks. The easiest way to understand what PayFi is is through this very gap: it finances a payment while that payment is in transit. The abbreviation is straightforward: Payment Finance, or PayFi.

What is PayFi in simple terms

PayFi in simple terms is a short-term loan for a specific payment, issued by a smart contract rather than a bank. A provider that needs to make a payout in another country does not keep capital there in advance. It takes liquidity from a pool, makes the payout today, and repays the debt when the sender's funds reach it. PayFi is not a separate payment method: the transfer continues to go through a local partner as before; only the source of the money funding it changes.

Two developments contributed to the emergence of PayFi as a distinct category: stablecoins provided a unit of settlement without a banking intermediary, while the RWA market accustomed investors to yields generated by the real economy. The term was introduced by Lily Liu, president of the Solana Foundation, who expanded on it in a keynote at the EthCC conference in July 2024. CoinGecko quotes her description: a new financial market built around the time value of money.

How PayFi works

The mechanics are repeated from one protocol to another.

1. A payment company receives an instruction to send $100,000 to another jurisdiction.
2. Instead of prefunding a local account, it borrows USDC from a pool.
3. The recipient is paid today, with the money provided by a local partner.
4. One to five days later, the company repays the debt together with a fee.
5. The fee is distributed among liquidity providers.

Liquidity is supplied to the pool by external depositors, institutional or retail, depending on the protocol's model. What matters here is not the rate but turnover: a short cycle allows the same dollar to finance several payments over the course of a month, and it is this frequency that generates the overall yield.

Key principles and features of PayFi

At its core is a principle from corporate finance: a dollar today is worth more than a dollar a week from now. PayFi turns this gap into a product.

This is where the model's distinctive features come from. A loan is issued against future cash flow rather than against overcollateralised crypto assets. Terms are short, usually up to a week, so the portfolio is revalued almost continuously. Settlement and financing operate within the same framework: the same contract that provides the liquidity also records the repayment.

How PayFi differs from traditional payment systems

The traditional model relies on correspondent accounts and capital placed in advance. This is where the cost comes from. According to World Bank data for the third quarter of 2025, the average global cost of sending $200 was 6.36%, rising to 14.99% for banks, while digital services remained at 4.59%.

PayFi removes not so much the intermediary's fee as the need to keep capital in every corridor. The second difference is timing: a bank payment operates according to the business day and often arrives on T+1 or T+2, while settlement on the network takes place around the clock, including weekends and local holidays when correspondent banking lines are closed.

How PayFi differs from DeFi

The difference lies in the source of yield. In traditional DeFi, rates rise when someone is willing to pay for leverage and fall as interest in speculation declines. In PayFi, income comes from a fee for a real payment, making it less closely tied to the market cycle.

The risk is also different. A liquidation mechanism does not work here: if a payment company fails to repay the money, there is nothing to sell. Instead, underwriting, credit limits, and tranche structures are used, while some pools are restricted by KYC and KYB requirements.

What role blockchain and smart contracts play in PayFi

PayFi on the blockchain relies on two properties of the network: settlement is finalised within seconds and does not observe weekends. Solana offers a block time of around 400 ms and a fee below $0.01, while Stellar is used in corridors involving local providers.

A smart contract handles what a back office does in a bank: it records the terms of the loan, distributes repayments among liquidity providers, and stops lending when a limit is exhausted. Data on payment status and the borrower's credit quality is supplied by oracles.

Main PayFi use cases

• Cross-border payouts without prefunding, which account for the majority of market volume.
• Accounts receivable financing: an invoice is tokenised and becomes collateral.
• Card settlements, where the issuer covers the gap between authorisation and receipt of funds.
• Advances to creators and contractors against future platform payouts.
• The Buy Now Pay Never model: a purchase is paid for by the yield generated by a deposit rather than by the deposit itself.

The order of these use cases is not accidental. The first two provide a predictable short-term cash flow and an identifiable licensed borrower, which is why volumes are concentrated there, while consumer-facing showcase mechanisms remain primarily demonstrations of what is possible.

Advantages of PayFi

For a payments business, the benefit is measured not by the interest rate but by the capital that is freed up: money that was sitting in ten countries just in case returns to circulation. For a depositor, PayFi payment financing provides income linked to companies' transaction volumes rather than market sentiment. The pool is visible on the blockchain, so its portfolio structure and overdue payments can be checked independently without waiting for a quarterly report.

Risks and limitations of PayFi

Credit risk does not disappear; it moves from the bank to the liquidity provider. Reports of zero defaults among young protocols mean only that the sector has not yet gone through a serious period of stress.

Next comes regulatory fragmentation. The US GENIUS Act and the European MiCA operate in parallel and do not recognise each other's licences, so the same stablecoin requires different arrangements on opposite sides of the Atlantic. Added to this are depegging, the possibility of addresses being frozen by the issuer, and errors in contracts and oracles. Concentration is another issue: a significant share of turnover is accounted for by several protocols and two stablecoins. There is also a market limitation. Yields in pools are compressed as capital flows in because the upper limit is determined not by depositor demand but by how much a payment company is willing to pay for five days of liquidity.

Which cryptocurrencies and stablecoins are used in PayFi

The unit of settlement here is almost always a stablecoin, most commonly USDC: it passes compliance checks more easily and has a regulated issuer. USDT is found in Asian corridors, while PYUSD and yield-bearing stablecoins appear in certain products. The segment's total market capitalisation exceeded $313 billion at the end of June 2026, according to DefiLlama.

Tokens in the sector that aggregators label as PayFi Crypto have nothing to do with the settlements themselves: they are utility and governance assets of the protocols. Volatile coins are not used for payments.

Examples of PayFi projects and solutions

Huma Finance occupies the financing layer and remains the largest by transaction volume. Messari records $9.0 billion in cumulative volume at the end of 2025, of which $2.2 billion came in the fourth quarter alone, while the protocol passed the $10 billion mark in February 2026.

Arf operates one layer above and provides cross-border liquidity for licensed payment institutions. Zeebu handles settlements for telecom operators in roaming, PolyFlow builds identity and compliance infrastructure, while Zoth and BSOS focus on trade finance. The six-layer PayFi Stack architecture itself was described by the Huma team back in July 2024.

Prospects for PayFi development

The sector has encountered two constraints. First, demand for short-term capital is limited by the actual transaction volume of payment corridors; it cannot be inflated through token issuance. Second, institutional capital follows clear licensing frameworks, while licensing regimes still differ across jurisdictions.

Its potential, however, is not measured by the size of the crypto market. CoinGecko, citing an industry estimate, puts the global payment finance market at $2.85 trillion at the end of 2024, with growth forecast to $4.78 trillion by 2029, while blockchain's share of that market is still measured in fractions of a percent.

That is why the focus should be not on TVL but on the share of payments that have actually passed through financing and on how portfolios behave during the first liquidity crisis.

Conclusion

PayFi does not replace a payment; it finances it. The value of the sector rests on settlement speed and on the fact that capital no longer sits idle in reserves.

For the owner of an exchange service, the practical conclusion is that working liquidity and the storefront are handled by different tools. The BoxExchanger platform is responsible for rates, exchange directions, and the operation of the exchange service itself, while the question of where to obtain working capital for payouts is addressed separately, and PayFi is gradually becoming one possible answer.

The information presented in this article is for informational purposes only and does not constitute a guide to action, financial recommendation, or investment advice. Investing in cryptocurrency involves a high level of risk, and every investor should conduct their own analysis, assess their financial capabilities, and consult professional financial advisers before making investment decisions.