📈 What Is Compound?
Compound is a decentralized, non-custodial lending protocol that enables users to supply and borrow crypto assets without intermediaries. Launched in 2018, Compound pioneered the algorithmic money market model that has become a cornerstone of the DeFi ecosystem. The protocol uses smart contracts to automate lending and borrowing, ensuring transparency, security, and efficiency.
Compound has evolved through multiple versions. Compound V2 introduced the core lending and borrowing functionality with multiple assets in a single pool. Compound V3 (Comet), the latest version, simplifies the borrowing experience by allowing users to only borrow a single base asset per market.[reference:0] Currently, there are three markets: the ETH market, the USDC market, and the USDT market. In each market, users can provide different assets as collateral and borrow the market's base asset (WETH, USDC, or USDT).[reference:1] This setup reduces protocol complexity and cross-asset risk, offering a simplified borrowing experience that's easier to manage and monitor.[reference:2]
Compound's native governance token, COMP, is distributed to users who interact with the protocol by lending or borrowing, incentivizing participation and aligning stakeholder interests.[reference:3] The protocol has been instrumental in driving USDT's growth within the DeFi ecosystem, providing a secure and liquid venue for stablecoin lending and borrowing.
Compound provides USDT holders with the ability to earn yield on idle stablecoin holdings and access liquidity without selling their assets. With the USDT market on Compound V3, users can supply USDT as the base asset to earn interest or use other collateral assets to borrow USDT.
💰 Lending USDT on Compound
Lending USDT on Compound is one of the simplest ways to earn passive income on stablecoin holdings. When you deposit USDT into Compound, you receive cUSDT (interest-bearing Compound USDT) tokens that represent your deposit and accrue yield over time.
How Lending Works
When you supply USDT to Compound, your funds are pooled with other lenders' deposits. Borrowers pay interest on the USDT they borrow, and that interest is distributed to suppliers proportionally. The interest rate (Supply APY) is dynamic and adjusts based on the utilization rate of the pool — higher borrowing demand leads to higher yields for lenders.[reference:4]
Step-by-Step Lending Guide
- Step 1: Connect Your Wallet — Visit app.compound.finance and connect a compatible wallet (MetaMask, WalletConnect, etc.).
- Step 2: Select the USDT Market — In the Compound interface, navigate to the USDT market.[reference:5]
- Step 3: Enter Amount — Click "Supply" and enter the amount of USDT you wish to lend.
- Step 4: Confirm Transaction — Review the transaction details and confirm in your wallet. You'll receive cUSDT tokens representing your deposit.
- Step 5: Earn Yield — Your USDT begins earning interest immediately. The yield accrues as the cUSDT exchange rate increases over time.
Your cUSDT balance remains constant, but the exchange rate between cUSDT and USDT increases over time as interest accrues. You can track your earnings on the Compound dashboard or via blockchain explorers like Etherscan.
🪙 Understanding cUSDT (Interest-Bearing USDT)
When you deposit USDT into Compound, you receive cUSDT tokens. These are interest-bearing tokens that represent your deposited USDT and the accrued interest.[reference:6]
- Exchange Rate Appreciation: Unlike aTokens on Aave where the balance increases, cUSDT works differently — the exchange rate between cUSDT and USDT increases over time as interest accrues. Your cUSDT balance stays constant, but each cUSDT is worth more USDT.
- Redeemable: You can redeem your cUSDT for the underlying USDT at any time at the current exchange rate.
- Transferable: cUSDT can be transferred to other wallets, allowing for composability with other DeFi protocols.
- Collateral Usage: cUSDT can be used as collateral in some DeFi strategies, though this is less common than using native assets directly.
The cUSDT token contract address on Ethereum is 0xf650C3d88D12dB855b8bf7D11Be6C55A4e07dCC9.[reference:7]
🏦 Borrowing USDT on Compound
Compound V3 introduces a unified borrowing market model where users can borrow the base asset (USDT) by supplying other assets as collateral.[reference:9] This simplifies the borrowing experience and reduces cross-asset risk.[reference:10]
How Borrowing Works on Compound V3
In the USDT market on Compound V3, users can provide different assets as collateral and borrow USDT.[reference:11] The Collateral Factor (CF) determines how much you can borrow against your collateral, while the Liquidation Factor (LF) and Liquidation Penalty determine when and how positions are liquidated.[reference:12]
Risk Parameters for USDT Market
Compound V3's USDT market on Ethereum Mainnet has the following risk parameters for key collateral assets[reference:13]:
| Collateral Asset | Borrow CF | Liquidation CF | Liquidation Penalty |
|---|---|---|---|
| cbBTC | 80.0% | 85.0% | 5.00% |
| COMP | 50.0% | 70.0% | 25.00% |
| LINK | 73.0% | 79.0% | 17.00% |
| mETH | 80.0% | 85.0% | 5.00% |
The Collateral Factor and Liquidation
The Collateral Factor determines the maximum borrowing capacity against collateral. If your debt exceeds the liquidation threshold, your position becomes eligible for liquidation.[reference:14] In Compound V2, the collateral factor serves both as the borrowing limit and the liquidation threshold, meaning positions can be liquidated almost immediately when crossing the borrow limit.[reference:15]
Compound V3 introduces a Liquidation Factor (LF) that is higher than the Borrow CF, creating a buffer between maximum borrowing and liquidation.[reference:16] The Liquidation Penalty typically ranges from 4% to 25% depending on the collateral asset.[reference:17]
If your collateral value drops below the liquidation threshold, your position can be liquidated. A liquidation fee of 5–25% is applied, and you lose a portion of your collateral. Always monitor your collateral ratio and maintain a conservative borrowing level.
📊 Interest Rates: Supply APY & Borrow APR
Compound uses an algorithmic interest rate model where rates adjust based on pool utilization.[reference:18] Here's what you need to know about USDT rates:
USDT Supply APY (Lending)
- Rates fluctuate with borrowing demand.
- On-chain analytics indicate average annualized yields on USDT lending pools range from 4% to 7% in 2025.[reference:19]
- COMP distribution incentives can boost total yields. The Net Rate blends the Supply APY with COMP Distribution APY based on the current price of COMP.[reference:20]
- During market stress or incentive periods, rates may temporarily reach higher levels.[reference:21]
USDT Borrow APR
- Borrow rates are also dynamic and increase with utilization.
- Borrowers also earn COMP rewards, effectively reducing the net borrowing cost.
- Gauntlet has recommended reducing supply incentives to 6 COMP daily (~0.88% APY) and borrow incentives to 2 COMP daily (~0.32% APY).[reference:22]
Compound's rates are generally more stable and predictable than some competitors, but may be less competitive during high demand. Always check the current rates on the Compound interface before depositing or borrowing, as rates change in real-time.
🏆 COMP Token Rewards
COMP is Compound's native governance token, distributed to users who interact with the protocol by lending or borrowing.[reference:24]
- Lenders earn COMP rewards in addition to supply interest.
- Borrowers earn COMP rewards, effectively reducing the net cost of borrowing.
- COMP holders can participate in Compound governance, proposing and voting on protocol changes.
- COMP distribution rates are subject to governance adjustments. In 2025, Gauntlet recommended reducing supply incentives to 6 COMP daily and borrow incentives to 2 COMP daily.[reference:26]
The Net Rate displayed on Compound's market page blends the Supply or Borrow APY with the COMP Distribution APY based on the current price of COMP.[reference:27]
🌐 Supported Networks
Compound is deployed on multiple blockchain networks, with USDT available on several of them:
| Network | USDT Market | Key Features |
|---|---|---|
| Ethereum Mainnet | Primary USDT market | Largest liquidity, V3 with USDT base |
| Arbitrum One | L2 scaling, low fees | ~19.79M cUSDTv3 supply |
| Polygon | L2 scaling, low fees | USDC & USDT markets available |
The initial deployment of Compound III was on Ethereum with USDC as the base asset.[reference:28] Since then, Compound has expanded to multiple networks and base assets, including USDT.[reference:29]
⚖️ Compound vs. Aave: Key Differences
Both Compound and Aave are leading DeFi lending protocols, but they have several key differences:
| Feature | Compound | Aave |
|---|---|---|
| Interest Rate Model | Stable variable rate model | Dynamic rate model with stable rates |
| Interest-Bearing Token | cToken (exchange rate increases) | aToken (balance increases) |
| Flash Loans | Not available | Yes |
| Asset Diversity | Limited | Wide range |
| Governance Token | COMP | AAVE |
| User Experience | Simple, beginner-friendly | More complex, feature-rich |
| Networks | Limited (Ethereum, Arbitrum, Polygon) | Wide (17+ networks) |
Compound is generally considered more user-friendly for beginners due to its simple interface and clear documentation. Aave offers more advanced features like flash loans and supports a wider range of assets.
⚠️ Risks of Using USDT on Compound
While Compound is one of the most battle-tested DeFi protocols, using USDT on the platform involves several risks:
Compound's smart contracts are extensively audited, but vulnerabilities can still exist. Exploits could lead to loss of funds.
If borrowing against collateral, a drop in collateral value could trigger liquidation with penalties of 5–25%.
In extreme market conditions, liquidity providers may face withdrawal delays if utilization is very high.
If USDT loses its dollar peg, the value of deposits could decline, affecting positions.
Borrow rates can increase significantly during high demand, affecting borrowing costs.
Changes in crypto regulation could impact the availability or legality of DeFi services.
To mitigate risks: (1) Monitor your collateral ratio regularly. (2) Use conservative borrowing levels (well below the maximum). (3) Diversify across multiple DeFi protocols. (4) Stay informed about Compound governance updates. (5) Only use amounts you can afford to lose.
✅ Best Practices for USDT on Compound
- Start Small: Begin with a small amount to understand the interface and transaction process before committing larger funds.
- Monitor Collateral Ratio: If borrowing, maintain a healthy collateral buffer to avoid liquidation.
- Choose the Right Network: Consider network fees (gas costs) when selecting which Compound deployment to use. Arbitrum and Polygon offer significantly lower fees than Ethereum mainnet.
- Stay Updated: Follow Compound governance proposals and risk parameter changes that may affect USDT positions.
- Understand cUSDT Mechanics: Remember that cUSDT works differently from aTokens — the exchange rate increases rather than the token balance.
- Diversify: Don't put all your USDT into a single DeFi protocol. Consider spreading across multiple platforms to reduce platform-specific risk.
- Claim COMP Rewards: Regularly claim your COMP rewards to maximize your total yield.
🔮 Future of USDT on Compound
The integration of USDT with Compound continues to evolve. Key developments include:
- Compound V3 (Comet) Expansion: The USDT market on Compound V3 continues to grow, with new collateral assets being added through governance proposals.[reference:33]
- Multi-Chain Deployment: Compound is expanding to more networks, including Arbitrum and Polygon, increasing USDT's reach.[reference:34]
- Risk Parameter Optimization: Gauntlet and other risk managers continuously refine USDT risk parameters to balance security and capital efficiency.[reference:35]
- Partial Liquidations: The Compound community is exploring partial liquidations to improve user experience and reduce liquidation penalties.[reference:36]
As DeFi matures, USDT's role on Compound is expected to grow, offering users increasingly sophisticated ways to earn yield, access liquidity, and manage their crypto portfolios.