Huma Finance is a blockchain-based payment financing protocol developing the PayFi concept: using on-chain liquidity to accelerate real-world payment settlements. Huma 2.0, launched on Solana in April 2025, introduced permissionless access to yield generated through payment financing, while the institutional version continued under the Huma Institutional brand. Liquidity is used for cross-border payments and other short-term settlements where businesses require capital before traditional settlement is completed. By 2026, Huma had evolved from a DeFi lending protocol into a broader PayFi infrastructure with the HUMA token, PST and mPST LP tokens, and integrations across the Solana ecosystem.
Contents
- What is Huma Finance and how does the PayFi model work?
- Huma 2.0: Classic, Maxi, PST and real yield mechanics
- HUMA token, rewards and protocol economics
- Solana, Arf and payment financing infrastructure
- Huma Finance development and the outlook for PayFi
1. What is Huma Finance and how does the PayFi model work?
Huma Finance launched in 2022 as a decentralized lending protocol focused on financing future cash flows. Unlike conventional DeFi loans that typically require overcollateralization with crypto assets, Huma's original model enabled credit products based on income, receivables and other expected future payments.
PayFi, or Payment Finance, later became the project's primary focus. Its purpose is to provide liquidity for real-world payment operations. For example, a company processing international transfers may need to pre-fund accounts in several countries. PayFi can finance these settlements for a short period using stablecoins, with the liquidity returning to the pool after the payment cycle is completed.
A key difference from long-term lending is the speed at which capital can be recycled. Under Huma's model, financing may be deployed for only a few days before the repaid funds become available for new payment transactions. LP yield is generated primarily from fees paid by businesses for access to this liquidity.
In 2024, Huma merged with Arf, a company providing on-demand liquidity for cross-border payments. The combination connected Huma's DeFi infrastructure with Arf's existing payment-financing activity. Following the merger, PayFi became the central positioning of the ecosystem, covering cross-border settlements and other short-duration real-world payment assets.
2. Huma 2.0: Classic, Maxi, PST and real yield mechanics
Huma 2.0 launched on Solana in April 2025 as the permissionless version of the protocol. Before this release, the main product was primarily designed for professional and institutional investors subject to KYC/KYB requirements. The newer version allows users from eligible jurisdictions to provide USDC without professional investor status, although wallets are screened for sanctions and other compliance risks.
After depositing USDC, users can choose between two modes. Classic is designed to combine base PayFi yield with HUMA rewards, while Maxi gives up the stable base yield in exchange for increased token incentives. APY parameters can change depending on market conditions and protocol activity.
| Component | Type | Role in Huma 2.0 |
|---|---|---|
| Classic Mode | LP Strategy | Combines PayFi yield with base HUMA rewards |
| Maxi Mode | LP Strategy | Gives up base APY in exchange for increased HUMA incentives |
| PST | Liquid LP Token | Represents a user's position in Classic Mode |
| mPST | Liquid LP Token | Represents a user's position in Maxi Mode |
| USDC | Stablecoin | Primary asset used to provide liquidity |
| HUMA | Utility / Governance Token | Used for incentives and the development of protocol governance |
PST stands for PayFi Strategy Token and represents an LP's position in Classic Mode. As a Solana SPL token, it can also be used outside Huma's primary interface. mPST performs a similar function for Maxi Mode. Users can switch between the two modes, with the existing LP token burned and the corresponding alternative token minted.
Huma also offers positions without a lockup as well as three- and six-month lockups. Longer lock periods increase the reward multiplier but restrict direct redemption until the term expires. To manage liquidity, the protocol uses a dynamic pool cap that connects the amount of accepted deposits with actual demand for capital from PayFi partners.
3. HUMA token, rewards and protocol economics
HUMA is the utility and governance token of the ecosystem. Its maximum supply is set at 10 billion tokens. The initial tokenomics allocated 31% of the supply to LP and ecosystem incentives, 20.6% to investors and 19.3% to the team and advisors, with the remaining tokens distributed across treasury, liquidity, marketing, airdrop and other categories.
The incentive system evolved from Huma Feathers, internal points awarded according to factors such as position size, selected mode and duration of participation. The protocol later began displaying accumulated HUMA rewards directly while retaining Feathers as part of the mechanism used to calculate token reward allocations.
Key elements of the Huma Finance economy:
- PayFi for financing real-world payment flows;
- USDC as the primary source of liquidity in Huma 2.0;
- Classic Mode combining base APY with HUMA rewards;
- Maxi Mode focused on increased token incentives;
- PST and mPST as liquid SPL tokens representing LP positions;
- optional three- or six-month lockups;
- HUMA as the utility and governance token;
- a dynamic pool cap linked to financing demand;
- DeFi integrations that expand the utility of LP tokens;
- separation between permissionless Huma and Huma Institutional.
HUMA is not intended to directly finance international transfers, as actual PayFi operations primarily use stablecoins. Instead, HUMA coordinates incentives and supports the development of protocol governance. Token holders are expected to participate in decisions involving protocol parameters, liquidity allocation and ecosystem incentives.
This structure creates two distinct sources of returns. The first comes from fees generated by the use of PayFi capital, while the second consists of HUMA incentives. The distinction is important: payment-financing yield depends on business demand and credit performance, while the value of token rewards also depends on the market price of HUMA and its emission schedule.
4. Solana, Arf and payment financing infrastructure
Solana became the primary blockchain for the permissionless version of Huma 2.0. Its high throughput and relatively low transaction costs allow the protocol to issue liquid LP tokens and integrate them with other DeFi applications. Huma Institutional has a broader infrastructure footprint, supporting solutions across Solana, EVM networks and Stellar.
Composability is an important feature of Huma 2.0. PST can be used in third-party DeFi protocols. Integrations with Jupiter and Meteora provide secondary PST/USDC liquidity, Kamino enables PST to be used in lending and liquidity strategies, while RateX supports structured positions that separate different components of yield.
Arf performs a different function. The company specializes in short-term liquidity for financial institutions handling international payments. Instead of permanently keeping proprietary capital in multiple countries, a payment company can access funding for a specific settlement and repay it after the transaction is completed. Huma connects these PayFi assets with on-chain liquidity.
The institutional layer uses additional risk-management mechanisms. Huma Institutional supports senior and junior tranches: senior positions have priority in the distribution of funds following a default, while junior positions accept greater risk in exchange for potentially higher returns. Institutional pools also use KYC/KYB, liquidity restrictions, first-loss protection and other controls.
Blockchain infrastructure does not eliminate credit risk. Returns depend on borrowers repaying the provided capital and on the performance of originators, payment companies, smart contracts and stablecoin infrastructure. Additional DeFi strategies involving PST can introduce separate liquidity, lending and smart contract risks.
5. Huma Finance development and the outlook for PayFi
In September 2024, Huma raised $38 million: $10 million in an equity round led by Distributed Global and another $28 million allocated to investments in real-world assets on the platform. Participants included HashKey Capital, Folius Ventures, Stellar Development Foundation and TIBAS Ventures.
The launch of Huma 2.0 in 2025 expanded access to PayFi through a permissionless model, while the institutional business became Huma Institutional. By 2026, the project reported more than $7 billion in cumulative on-chain transaction volume, with the PayFi network approaching approximately $1 billion in monthly volume.
The sustainability of the model depends primarily on real demand for short-term payment financing. Huma therefore adjusts its pool cap according to available PayFi opportunities, helping align deposited liquidity with the actual capital requirements of borrowers and payment partners.
Key risks include borrower defaults, originator failures, declining financing demand, stablecoin depegging, smart contract vulnerabilities and liquidity risks associated with PST and mPST. Classic Mode yields and the market value of HUMA are also variable rather than fixed.
Huma Finance combines elements of DeFi, RWA and global payments. Huma 2.0 provides permissionless access through Solana, while Huma Institutional serves the more regulated segment of the market. The long-term prospects of PayFi will depend on real payment volumes, effective credit-risk management and the ability to turn short-term global cash flows into a sustainable source of on-chain liquidity and yield.
