What Is Loan Liquidation in Crypto?

What Is Loan Liquidation in Crypto?

Liquidation is one of the most important concepts to understand before taking out a crypto loan. It is the mechanism by which a lending platform forcefully sells your collateral to repay your loan when the value of your collateral drops too low.

If you borrow stablecoins against your Bitcoin and the price of BTC falls significantly, the platform does not just wait and hope the price recovers. It acts to protect itself and its lenders by selling your Bitcoin. Understanding how, when, and why this happens is crucial for any borrower.

How Liquidation Works: The Basics

Every crypto loan is collateralized — you deposit an asset (like Bitcoin) worth more than what you borrow. This overcollateralization provides a safety buffer. But if the market moves against you, that buffer can shrink.

Here is the basic sequence:

1. You open a loan — You deposit $20,000 worth of BTC and borrow $10,000 in USDC. Your loan-to-value (LTV) ratio is 50%.
2. Bitcoin's price drops — As BTC falls, your collateral is worth less while your debt stays the same. Your LTV ratio rises.
3. You approach the threshold — The platform has a liquidation threshold — say 80% LTV. When your collateral value drops enough that your LTV exceeds this threshold, liquidation is triggered.
4. Liquidation executes — The platform sells some or all of your Bitcoin to repay the loan and any associated fees.

In this example, liquidation would trigger when your $20,000 collateral drops to approximately $12,500 (since $10,000 / $12,500 = 80% LTV). That represents a 37.5% decline in Bitcoin's price from when you opened the loan.

The Health Factor

Many DeFi protocols express your liquidation risk through a metric called the health factor. This is a number that indicates how safe your position is:

• Health factor above 1 — Your position is safe
• Health factor at 1 — You are at the liquidation threshold
• Health factor below 1 — Liquidation can be triggered

The health factor is calculated as:

Health Factor = (Collateral Value × Liquidation Threshold) / Total Debt

A higher health factor means a safer position. Most experienced borrowers aim for a health factor of at least 1.5 to 2.0, giving them substantial room before liquidation becomes a concern.

DeFi Liquidation: How It Works on Chain

In decentralized lending protocols, liquidation is not performed by the platform itself. Instead, it is carried out by third-party liquidators — bots and individuals who monitor the blockchain for undercollateralized positions.

The Liquidation Process

1. Monitoring — Liquidator bots constantly scan the blockchain for positions where the health factor has dropped below 1.
2. Calling the function — When a liquidatable position is found, the liquidator calls the protocol's liquidation function, repaying part of the borrower's debt.
3. Receiving collateral — In exchange for repaying the debt, the liquidator receives the borrower's collateral at a discount — this is the liquidation bonus (also called the liquidation incentive).
4. Position adjustment — The borrower's debt is reduced and their collateral is reduced by more than the debt amount (because of the bonus/penalty).

The Liquidation Penalty

When your position is liquidated, you do not just lose collateral equal to your debt. You also pay a liquidation penalty, which typically ranges from 5% to 15% of the liquidated amount.

For example, if $5,000 of your debt is liquidated and the penalty is 10%, the liquidator receives $5,500 worth of your Bitcoin ($5,000 to repay the debt plus $500 as the bonus). This penalty is what incentivizes liquidators to perform the liquidation quickly, keeping the protocol solvent.

Partial vs. Full Liquidation

Most DeFi protocols use partial liquidation. This means only enough collateral is sold to bring your position back above the health factor threshold — not your entire position. Typically, a liquidation closes 50% of the unhealthy debt.

However, in extreme market conditions (rapid price crashes), multiple partial liquidations can occur in quick succession, potentially liquidating a much larger portion of your collateral. In the worst case, your entire position could be liquidated.

CeFi Liquidation: How It Works with Centralized Lenders

Centralized lenders handle liquidation differently, and the process is often less transparent.

Margin Calls

Many CeFi lenders issue margin calls before liquidation. A margin call is a notification that your LTV ratio is approaching the danger zone, giving you time to either:

• Add more collateral
• Repay part of the loan
• Accept that liquidation will occur if you take no action

This warning system is a significant advantage of CeFi lending. DeFi protocols do not send notifications — liquidation happens automatically when the threshold is crossed.

CeFi Liquidation Mechanics

When a CeFi lender liquidates your position:

1. They may sell your collateral on the open market
2. They may use their own reserves to cover the loan and claim your collateral
3. The specific process depends on the lender's terms of service

Some CeFi lenders liquidate the entire position rather than doing partial liquidations. Others may give you a grace period after the margin call. Always read the fine print before choosing a CeFi lender.

What Triggers Liquidation?

Several events can push your position toward liquidation:

Price Drops in Your Collateral

This is the most common trigger. If you have deposited Bitcoin and BTC's price falls, your collateral value decreases while your debt remains the same.

Interest Accumulation

On variable-rate DeFi loans, accrued interest increases your total debt over time. If rates spike, your debt can grow faster than expected, gradually pushing your LTV higher even if the collateral price stays flat.

Oracle Price Updates

DeFi protocols rely on price oracles to determine asset values. Liquidation happens based on the oracle price, which may differ slightly from exchange prices. In rare cases, oracle manipulation or delays can trigger unexpected liquidations.

Calculating Your Liquidation Price

Knowing your liquidation price helps you manage risk proactively. Here is how to calculate it:

Liquidation Price = (Debt × Liquidation Threshold Factor) / Collateral Amount in BTC

For a practical example:

• You deposit 1 BTC (currently worth $60,000)
• You borrow $30,000 USDC (50% LTV)
• The liquidation threshold is 80%

Your liquidation price = $30,000 / (1 BTC × 0.80) = $37,500 per BTC

This means Bitcoin would need to fall from $60,000 to $37,500 — a 37.5% drop — before liquidation triggers. That is a meaningful buffer, but not impossible in crypto markets, which have historically experienced 30-50% corrections during bear markets.

Strategies to Avoid Liquidation

Prevention is far better than recovery when it comes to liquidation. Here are practical strategies:

1. Borrow Conservatively

The simplest way to avoid liquidation is to borrow well below the maximum LTV. If the platform allows up to 75% LTV, consider borrowing at 40-50% instead. This gives you a much larger buffer.

As you can see, the difference between 75% LTV and 50% LTV is dramatic. At 75%, a modest 7% price drop triggers liquidation. At 50%, Bitcoin would need to fall by nearly 38%.

2. Monitor Your Position

Set up price alerts for Bitcoin at key levels:

• Warning level — When BTC drops 15-20% below your entry price
• Action level — When BTC approaches 25-30% below your entry price
• Critical level — When BTC is within 10% of your liquidation price

Many portfolio trackers and exchange apps let you create custom alerts. Do not rely on memory — automate your monitoring.

3. Keep Reserve Collateral Ready

Have additional Bitcoin or stablecoins available in your wallet so you can quickly add collateral if your position deteriorates. Adding collateral reduces your LTV and pushes your liquidation price lower.

4. Partially Repay During Downturns

If the market is dropping and you are getting concerned, consider repaying a portion of your loan. This directly reduces your debt, improving your LTV ratio and lowering your liquidation price.

5. Use DeFi Automation Tools

Tools like DeFi Saver can automatically add collateral or repay debt when your health factor approaches dangerous levels. These automated safety nets can protect you even when you are not actively watching the market.

6. Choose the Right Platform

Different platforms have different liquidation thresholds, penalties, and mechanics. Using Borrow by Sats Terminal to compare these details across lenders helps you choose a platform with favorable liquidation terms.

Learn more in our detailed guide on how to reduce liquidation risk.

What Happens After Liquidation?

If your position gets liquidated, here is what typically happens:

In DeFi:

• A portion of your collateral is sold to repay part of your debt
• You pay a liquidation penalty (5-15% of the liquidated amount)
• Your remaining collateral stays in the protocol
• You still keep the borrowed stablecoins
• You can add more collateral and continue or close the remaining position

In CeFi:

• The lender sells your collateral according to their terms
• Any excess collateral above your debt and fees may be returned
• Your loan is marked as closed or restructured
• The specific process varies by lender

The Cost of Liquidation

Getting liquidated is expensive. Beyond the immediate loss of collateral, the costs include:

1. Liquidation penalty — 5-15% of the liquidated amount
2. Selling at the worst time — Your collateral is sold during a price drop, locking in losses
3. Lost position — If Bitcoin recovers after the crash, you have already lost your BTC
4. Gas fees — On Ethereum, liquidation transactions can involve high gas costs during network congestion (which often coincides with market crashes)

For example, on a $10,000 liquidation with a 10% penalty, you lose $1,000 just in the penalty alone — on top of losing your Bitcoin at a depressed price.

Liquidation in Market Crashes

Major market crashes create the highest liquidation risk. During the COVID crash of March 2020, Bitcoin dropped over 50% in a single day. During the May 2021 crash, BTC fell from $58,000 to $30,000 in weeks.

These events trigger cascading liquidations:

1. Price drops cause initial liquidations
2. Liquidated collateral is sold on the market, pushing prices down further
3. Lower prices trigger more liquidations
4. The cycle continues until selling pressure is exhausted

This cascading effect can make crashes more severe than they would otherwise be. Understanding this dynamic reinforces the importance of conservative borrowing.

Key Metrics to Know

Before taking out a crypto loan, make sure you understand these liquidation-related terms:

• Liquidation threshold — The LTV ratio at which liquidation can be triggered
• Health factor — A numeric indicator of position safety (above 1 is safe)
• Liquidation penalty — The extra cost you pay when liquidated
• Liquidation bonus — The discount liquidators receive (same as penalty, from their perspective)
• Close factor — The maximum percentage of debt that can be liquidated at once (typically 50% in DeFi)

Making Informed Decisions

Liquidation is a risk, not a certainty. With proper planning, most borrowers never experience it. The key principles are:

1. Borrow conservatively — Leave a significant buffer between your LTV and the liquidation threshold
2. Monitor actively — Know your liquidation price and watch the market
3. Have a plan — Know in advance what you will do if prices drop 20%, 30%, or 50%
4. Compare platforms — Use Borrow by Sats Terminal to understand the liquidation terms of different lenders before committing
5. Start small — If you are new to crypto borrowing, begin with a small loan to learn the mechanics before committing significant capital

Understanding liquidation is not about being scared of it — it is about being prepared. With the right approach, you can borrow against your Bitcoin confidently, knowing exactly where your risk boundaries are and how to stay well within them.