What is liquidation threshold?

Liquidation threshold = max LTV at liquidation trigger. Usually 10-15% above standard LTV. Example: 50% LTV, 60% threshold. Borrowing at 50% is safe; liquidation triggers at 60% threshold when collateral falls.

How do I avoid liquidation?

Monitor health factor daily. Maintain HF >1.5. Use diversified collateral. Keep borrow low relative to collateral (40-50% max LTV). Set price alerts ($5K drops on ETH, etc.). Repay debt or add collateral when HF approaches 1.2. Never borrow max LTV.

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Overcollateralized Loans Guide 2026

Q: How does liquidation work?

When collateral value falls, health factor drops. At health factor 1.0, liquidators can repay your debt and buy collateral at 5-10% discount. You lose both the collateral and the debt repayment, resulting in capital loss. Example: $1000 ETH → $600 ETH + liquidation = ~$500 net loss.

Q: What is health factor?

Health Factor = (collateral value × LTV) / total debt. >2.0 = safe. 1.5-2.0 = caution zone. 1.0-1.5 = danger zone. <1.0 = liquidation active. Monitor daily for leveraged positions. Automated tools can trigger liquidation alerts.

Q: Can I get liquidated?

Yes, if health factor 1.5. Use price alerts to monitor collateral value.

Overcollateralized lending is DeFi's safest borrowing model. This guide explains LTV (Loan-to-Value) mechanics, health factor calculations, liquidation triggers, and how to borrow safely on Aave, Compound, and Morpho. Master these concepts to avoid liquidation and maximize leverage without ruin.

Updated: April 11, 2026Reading time: 13 min

SatoshiGhost·Lead Researcher

Apr 11, 2026

13 min read

1. Overcollateralization: The Core Concept

You deposit collateral (ETH, BTC, USDC). You borrow less value than deposited. Example: deposit $10,000 ETH, borrow $5,000 USDC. The $5,000 gap is the safety margin. If ETH drops 40%, you're still solvent. If ETH drops 60%, you get liquidated. This model protects lenders (their funds are safe) and borrowers (you keep excess collateral).

⚠️Risk Assessment

APY is the bait, but smart contract risk is the hook. We prioritize protocols with multiple independent audits and active bug bounty programs.

Overcollateralization is fundamental to DeFi lending. It prevents bad debt and cascade failures. The tradeoff: you must lock up capital to borrow. Borrow $100, lock $200-250. This is inefficient vs traditional banking (where you borrow 100% of asset value) but necessary for trustlessness.

2. LTV Explained: Loan-to-Value Ratio

LTV = borrow amount / collateral value. 50% LTV means borrow $50 per $100 collateral. Each asset has different max LTV based on volatility. Stable assets (USDC, USDT) have higher LTV (100%, meaning borrow up to face value). Volatile assets (ETH, BTC) have lower LTV (75-83% max).

LTV by Asset Type (Aave April 2026)

ETH: 83% max LTV (low volatility for major assets)
wBTC: 75% max LTV
Stablecoin (USDC, USDT): 100% max LTV
Altcoins (SOL, MATIC): 50-60% max LTV (higher volatility)
Risky assets: 0% LTV (cannot borrow against, only collateral)

Safe LTV Tiers

Conservative: Borrow 30-40% of collateral value. HF stays >3.0 even in 50% crash.
Moderate: Borrow 50-60% (standard). HF drops to ~1.5 in 50% crash.
Aggressive: Borrow 70-80% (high risk). HF <1.5 in 50% crash, liquidation likely.

LTV Rule of Thumb

Max safe LTV ≤ 60% for most portfolios. Leave 40% safety margin. In a 30% crash, health factor stays >1.5. You have time to react. Never borrow at max LTV (>80%); one market move liquidates you instantly.

3. Health Factor: The Key Metric

Health Factor (HF) = (collateral value × LTV) / total debt. This single number indicates liquidation risk. Monitor it obsessively. Every 1% collateral drop reduces HF proportionally. When HF reaches 1.0, liquidation becomes active.

Health Factor Zones

HF >2.0: Safe. Collateral can drop 50%+ before liquidation risk. Most conservative positions.
HF 1.5-2.0: Caution. Moderate risk. Watch for market moves. Add collateral if HF approaches 1.2.
HF 1.0-1.5: Danger. High liquidation risk. Market drop triggers liquidation. Not recommended for sleep.
HF <1.0: Liquidation active. Liquidators repay debt, capture collateral discount. You lose capital.

Example Calculation

Deposit $10,000 ETH (83% max LTV). Borrow $6,000 USDC (60% LTV). HF = ($10,000 × 0.83) / $6,000 = 1.38. If ETH drops to $7,000: HF = ($7,000 × 0.83) / $6,000 = 0.97 (liquidation!). If ETH drops to $7,250: HF = 1.0 (liquidation threshold). Safe drop: ETH can go to $7,229 before HF <1.0.

Monitoring Tools

Dashboard alerts: Aave UI shows HF in red/yellow/green. Set phone alerts at HF 1.5. Use Telegram bots (Aave alerts) for real-time notifications. Check portfolio daily during market volatility.

4. Liquidation Mechanics

When HF drops below 1.0, liquidators spring into action. Liquidators are bots and traders monitoring undercollateralized positions. They profit from your misfortune: they repay your debt (paying USDC) and receive collateral at 5-10% discount (taking ETH). You lose both capital and the discount spread.

Liquidation Example

You: $10,000 ETH collateral, $6,000 USDC debt, 50% HF at ETH=$7,000. Liquidator sees HF <1.0. Liquidator repays $6,000 USDC debt. Liquidator receives ETH worth $6,600 (10% discount). You lose: $6,600 ETH (original $10,000) + $6,000 debt = net -$6,000 (30% portfolio loss). Liquidator profit: $600 (10% discount).

Protection: Liquidation Threshold

Liquidation threshold = max LTV at which liquidation triggers. Usually 10-15% above standard LTV. Example: ETH max LTV 83%, liquidation threshold 86%. Borrowing at 50% LTV safe; if collateral falls, liquidation triggers at 60% threshold (not 50%). This grace period gives you time to react.

5. Safe Borrowing Strategies

Conservative: Stablecoin Lending

Borrow USDC against USDC at 100% LTV. Earns 5-6% on borrowed capital. Zero liquidation risk (same asset). Best for predictable returns. Example: $10,000 USDC, borrow $10,000 USDC, earn 5% = $500/year. Net zero leverage risk.

Moderate: Collateralized Stablecoin Borrow

Supply $10,000 ETH, borrow $5,000 USDC (50% LTV). Earn yield on ETH + borrow stablecoins for yield farming. Example: earn 3% on ETH = $300, earn 8% on $5K USDC in Morpho = $400. Total: $700/year on $10K = 7% blended. HF stays >2.0 in 50% crash (safe).

Aggressive: Leverage Farming

Supply $10,000 ETH, borrow $7,000 USDC (70% LTV). Use USDC to buy $7,000 more ETH. Deposit ETH, borrow more USDC (loop). 2-3x leverage possible. Earn amplified ETH yield but face liquidation risk. HF <1.5 in 30% crash. Only for experienced traders with hedges.

Recommended Starting Point

Start with conservative stablecoin borrow. Once comfortable with mechanics, graduate to moderate collateralized borrow (50% LTV). Only attempt leverage farming (70%+ LTV) after 6+ months DeFi experience and with hedges (short positions, stop-loss orders).

6. Frequently Asked Questions

What is LTV?+

LTV = borrow amount / collateral value. 50% LTV means borrow $50 per $100 collateral. Higher LTV increases leverage and risk. ETH max: 83% LTV. USDC max: 100%. Safe: 40-60% LTV.

How does liquidation work?+

Health factor drops below 1.0 → liquidators repay debt and buy collateral at 5-10% discount. You lose both debt amount and collateral difference. Example: $10K ETH, $6K debt → liquidated at HF <1.0 → lose ~$6K.

What is health factor?+

HF = (collateral value × LTV) / total debt. >2.0 safe, 1.5-2.0 caution, 1.0-1.5 danger, <1.0 liquidation. Monitor daily for leveraged positions. Automated alerts recommended.

Can I get liquidated?+

Yes, if health factor <1.0. Avoid by maintaining HF >1.5. Monitor price alerts. Repay debt or add collateral if HF approaches 1.2. Never borrow max LTV.

How to avoid liquidation?+

Monitor HF daily. Maintain >1.5. Use diversified collateral. Keep borrow low (40-50% max LTV). Set price alerts. Repay debt when HF approaches 1.2. Never borrow at max LTV. Sleep soundly.