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Aave Lending Tutorial: How to Lend and Borrow Crypto in DeFi

Aave is the largest decentralized lending protocol. Step-by-step guide to earning interest by depositing, borrowing against collateral, managing health factor, and avoiding liquidation.

Published: 2026-04-11
CryptoGuide

Bank loans require credit checks, waiting, and endless paperwork.

On Aave, you just click a few buttons and borrow in 30 seconds.

What Can Aave Do?

FeatureDescriptionYou Get
SupplyDeposit tokens for others to borrowInterest income
BorrowCollateralize assets, borrow other tokensAssets you need
Flash LoansUncollateralized loans (repaid in same tx)Arbitrage opportunities

Step-by-Step Guide

Step 1: Connect Wallet

  1. Go to app.aave.com
  2. Select network (recommend Arbitrum or Base for lower gas)
  3. Connect MetaMask

Step 2: Supply to Earn Interest

  1. Find your token in "Markets" (e.g., USDC)
  2. Click "Supply"
  3. Enter amount → Confirm transaction

Step 3: Borrow

  1. First supply collateral (e.g., ETH)
  2. Find desired token in "Borrow" (e.g., USDC)
  3. Enter borrow amount → Confirm

Health Factor

Health FactorRiskAction
> 3.0🟢 SafeRelax
2.0-3.0🟡 StableMonitor
1.5-2.0🟠 CautionConsider reducing debt
1.0-1.5🔴 DangerAdd collateral or repay immediately
= 1.0💀 LiquidationCollateral auto-sold

Warning

Don't Borrow Maximum!

Aave shows the max you can borrow, but borrowing maximum puts your Health Factor near 1.0. Any small price drop triggers liquidation. Borrow less than 50% of maximum.

Danger

Liquidation Incurs 5-10% Extra Penalty

Getting liquidated doesn't just sell your collateral — Aave charges an additional liquidation penalty (typically 5-10%). Manage your Health Factor proactively.

Conclusion

Aave makes lending something anyone can do in 30 seconds.

Supplying for interest is one of the simplest passive income methods. Borrowing is a leverage tool for DeFi power users. Whatever your use case, remember: always respect the liquidation line.

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