Liquidation Penalty
An additional fee charged to borrowers when their collateral is liquidated, typically 5-15%. This penalty incentivizes borrowers to maintain healthy collateral ratios and compensates liquidators.
When your collateral drops too far, the protocol doesn't send a warning email — it sells your collateral immediately, and charges you extra for the privilege. That extra charge is the liquidation penalty.
It exists for two reasons: to punish borrowers who let their positions get dangerous, and to reward the liquidators who step in to clean up the mess. Both matter for keeping the protocol solvent.
How It Works
Say you borrow $7,000 USDC against $10,000 of ETH — a 70% loan-to-value ratio. The protocol's liquidation threshold is 80% LTV. ETH drops, your collateral is now worth $8,500, and you've crossed that line. A liquidator repays part of your debt and seizes collateral at a discount.
That discount is the penalty — typically 5% to 15% depending on the protocol and asset. On Aave v3, ETH carries an 8.5% liquidation penalty. That means the liquidator buys your ETH at 8.5% below market price. You absorb that loss on top of the collateral already seized.
The penalty scales with perceived risk. Volatile assets like smaller-cap tokens carry higher penalties than stablecoins or blue-chip collateral. The protocol is pricing in the cost of moving that asset fast, in a bad market.
Why It Matters
The penalty isn't just a fee — it's a cliff. You don't lose 8.5% of your profit. You lose 8.5% of the collateral seized, on top of the debt repaid. A borrower who was already underwater gets hit twice: once by the price drop, once by the penalty.
What is Liquidation Threshold?
The LTV ratio at which a lending protocol will begin liquidating a borrower's collateral. For example, if the liquidation threshold is 80%, your collateral will be sold if your debt reaches 80% of its value.
Full glossary entryBill's Take
In 25 years of mortgage lending, I watched borrowers get foreclosed on — but that process took months, sometimes years. A judge was involved. There were notices, hearings, redemption periods. DeFi liquidation happens in a single block, sometimes under 15 seconds. No phone call. No workout plan. Just math, executed by a bot.
For lenders, the penalty is actually a feature. It ensures liquidators have a financial incentive to act fast, which keeps bad debt from accumulating in the protocol. A healthy liquidation mechanism protects depositors — the people on the other side of your loan.
What to Watch
The most common mistake is confusing the liquidation threshold with your safe borrowing limit. Borrowing right up to 79% LTV when the threshold is 80% leaves almost no buffer. A 2% price move wipes you out — and then the penalty takes another chunk on top.
What is Liquidation Penalty?
An additional fee charged to borrowers when their collateral is liquidated, typically 5-15%. This penalty incentivizes borrowers to maintain healthy collateral ratios and compensates liquidators.
Full glossary entryThe Cascade Risk
Partial liquidations can leave you in a worse position than a full one. Some protocols liquidate only enough collateral to bring your LTV back under the threshold. If the market keeps falling, you get liquidated again — and pay the penalty again. There is no limit to how many times this can happen in a single drawdown.
Keep your LTV well below the liquidation threshold — not 1-2% below, but 15-20% below. The penalty is avoidable. Getting close to the threshold is a choice, not bad luck.
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