How crypto liquidation works: the margin-ratio trigger behind forced unwinds

How crypto liquidation works is closer to a solvency test than a single “price touch” event: when your assets can’t cover liabilities plus accrued interest at the platform’s threshold, the exchange forces a unwind. What gets sold, in what order, and what you lose depends on margin mode, collateral haircuts, index pricing, and liquidation fees—not just the candle on the chart.

Key Takeaways

• Liquidation triggers when a platform-defined margin level or risk ratio falls to a liquidation threshold, not when last-traded price hits a single line.
• On Binance Margin, margin level is calculated as Asset ÷ (Total Liabilities + Outstanding Interest), and liquidation thresholds differ by cross vs isolated mode and by leverage.
• “Liquidation price” is an estimate that can drift as interest accrues and as index price inputs and position updates change the account’s solvency math.
• During forced liquidation, exchanges can apply token-specific haircuts and liquidate collateral in a priority order, then charge a liquidation fee from what remains.

How crypto liquidations happen

Liquidation begins the moment a leveraged account fails the platform’s coverage test. The user has taken on leverage by borrowing against collateral, so the account is effectively a small balance sheet: assets on one side, liabilities on the other. When the asset side shrinks relative to debt plus interest, the platform steps in and forcibly sells collateral to repay what is owed.

On Binance Margin, the trigger is explicitly threshold-based: when the liquidation threshold is reached, the margin position is liquidated and collateral is sold to repay liabilities and interest owed. That framing matters because it shifts attention away from a single “liquidation price crypto” line and toward the ratio the exchange is actually monitoring.

This is also why liquidation is not limited to one product type. The same logic shows up in spot margin, in perpetual futures, and in on-chain lending. The mechanics differ, but the intent is consistent: prevent bad debt by closing positions before the account goes negative. In DeFi, the equivalent event is a defi liquidation, where a protocol sells collateral via an auction or a liquidator transaction when a health factor breaches a threshold.

The output of liquidation is not just “position closed.” It is a forced settlement waterfall: collateral is valued using the platform’s pricing inputs, liabilities are netted, interest is included, collateral may be haircut, and a liquidation fee can be taken. That is why “getting liquidated” can look surprising on the screen even when the chart wick never printed at the user’s displayed number.

Margin level, risk ratio, and thresholds

Binance’s documentation is unusually direct about the trigger math. In its liquidation price examples, it defines margin level as:

Margin Level = Asset / (Total Liabilities + Outstanding Interest).

It also presents a closely related measure, the risk ratio:

Risk Ratio = Total Assets / (Total Amount Borrowed + Interest Payable), with liquidation triggered when the risk ratio reaches the liquidation risk ratio.

The key point is that the denominator is not static. Liabilities grow with interest, and the platform can use index price inputs rather than last-traded price for calculations. That makes liquidation a moving test of solvency, not a fixed tripwire.

Thresholds are not universal across modes. On Binance Margin, liquidation thresholds vary by margin mode and leverage multiplier. The platform lists Cross Margin Classic Mode (3x and 5x) liquidating at Margin Level ≤ 1.1. In Isolated Margin Mode, the thresholds differ: 3x liquidates at Margin Level ≤ 1.18, 5x at ≤ 1.15, and 10x at ≤ 1.05.

That difference is why “same position size” can carry very different liquidation risk depending on whether collateral is shared across the account (cross) or ring-fenced to a single pair (isolated). It also ties directly into maintenance margin as traders use the term on derivatives venues: the account must stay above a minimum coverage threshold, and that threshold is product- and leverage-dependent.

Binance also publishes margin call ratios that sit above liquidation, which is the platform’s way of warning that the account is approaching the cliff. It explicitly warns that extreme moves can jump from margin call to liquidation fast enough that Auto Top-Up may not execute in time.

How liquidation price is estimated

The liquidation price shown on a venue is best treated as a derived reference number, not a promise. Binance explicitly positions it as an estimate and points users to its margin calculator for an estimated liquidation price.

A concrete example from Binance’s cross margin illustration shows how the estimate is built from the ratio, not from the entry price. With 10,000 USDT posted as collateral and 20,000 USDT borrowed to buy 1 BTC at $30,000, Binance’s example uses a 1.1 cross-margin liquidation ratio assumption and produces an estimated BTC liquidation price of $22,000.

Two things make that estimate drift.

1. Interest accrual moves the denominator. Binance’s ETH example assumes interest of 0.01% per hour. After 4 hours, interest accrues on the borrowed ETH, changing liabilities and shifting the liquidation price. After 72 hours, additional interest accrues again and the liquidation price shifts again. 2. Position and order updates change the asset mix. In the same ETH example, the liquidation price calculation changes after a sell order fills and the account’s positions update. The displayed liquidation price is conditional on the current snapshot.

Binance also explains why a liquidation price can display as “/” or “--” for a token. The platform calculates each token’s liquidation price assuming other positions’ values remain constant. If that token going to zero would still not cause liquidation because other collateral covers the debt, the platform may not display a liquidation price for that token.

This is the practical reason the liquidation price anchor text matters. The liquidation price is a useful dashboard number, but the trigger is the ratio, and the ratio moves with time, interest, and index pricing.

What exchanges do during liquidation

Once the threshold is breached, the exchange runs a forced liquidation process that looks more like settlement than discretionary trading. Binance describes a single forced liquidation process used for both Cross Margin and Isolated Margin, and it includes two mechanics that most retail explanations skip.

1. Netting and fee calculation. Binance’s steps start by calculating total net asset and net debt before liquidation by netting same-asset collateral against same-asset debt. It then calculates the total amount pending settlement as net debt plus applicable fees. 2. Risk-based haircuts. Binance applies a Risk-Based Liquidation Adjustment, where each token has a risk-based liquidation ratio applied to net collateral values. This is a haircut mechanism: two accounts with the same mark-to-market value can have different liquidation outcomes if their collateral mixes have different risk ratios. 3. Collateral liquidation priority. Binance states that more liquid assets are prioritized for liquidation first to minimize market impact and user costs. It also specifies ordering logic: tokens are prioritized by lower risk-based liquidation ratio first, then by collateral ratio, with Binance determining order when ratios match. 4. Liquidation fee. Binance states liquidation fees are charged on both regular liquidation and takeover liquidation. The fee rate shown is 2% for Cross Margin Classic Mode and 2% for Isolated Margin Mode, deducted from remaining assets in the margin account.

This is why “the exchange sells the losing coin first” is often wrong. The platform is optimizing for settlement certainty and liquidity, not for the user’s narrative of which position “caused” the problem.

On derivatives venues, similar logic exists one layer up. When the system is stressed, some venues use adl auto deleveraging to reduce opposing traders’ positions if the platform can’t safely close liquidations into the market. Many venues also maintain an insurance fund to absorb losses from bankrupt accounts and reduce the need for ADL. The labels differ by venue, but the goal is the same: keep the system solvent when liquidations are happening faster than the order book can absorb.

Liquidation cascades and risk controls

Liquidations become market-moving when they cluster. A liquidation cascade forms when forced selling (or forced buying to cover shorts) pushes price into the next band of leveraged positions, triggering more liquidations, which pushes price again. The cascade is not mysterious. It is a positioning problem that shows up when leverage is crowded on one side.

PatentPC claims that during 2021 bull market peaks, average daily crypto liquidations exceeded $250 million, and that in major crash events daily liquidations can spike beyond $1 billion. It also claims over 90% of liquidations are typically longs during sudden drops, and that leverage of 20x or higher is involved in over 60% of liquidated positions. Those market-wide figures are not corroborated by the Binance mechanics docs, but they match the basic cascade intuition: one-way leverage makes the unwind reflexive.

A community-reported example of cascade dynamics appears in a Reddit post dated 2025-09-22, which claims an ETH liquidation cascade with $1.53 billion wiped out in leveraged positions, including $900 million in ETH, affecting 404,386 traders. Those figures are not independently verified in the provided source set, but the pattern described is consistent with how cascades propagate.

Risk control on a venue like Binance is mostly about managing the ratio, not predicting the wick. Binance’s own guidance emphasizes monitoring margin levels and collateral values, paying attention to margin call notifications, and adding margin early. It also warns that extreme moves can liquidate positions before Auto Top-Up can be performed, which is a timing problem traders routinely underestimate.

This is where the broader perpetual futures market ties back in. Perps concentrate leverage and can turn a small spot move into a liquidation cascade when positioning is one-sided and forced unwinds hit thin liquidity.

The Take

I’ve watched traders obsess over a single liquidation price line like it’s a stop order sitting on the book. On Binance Margin, the trigger is the margin level or risk ratio, and the denominator quietly grows with interest. That is how a position that looked “fine” in the morning gets clipped at night without a dramatic spot move.

The expensive surprise is the settlement waterfall. When liquidation hits, the venue can haircut collateral, sell the most liquid stuff first, and take a liquidation fee. The screen tells a story that feels personal, but the system is doing solvency math. Treat the margin level like the actual trigger, and treat collateral mix like P&L, especially when perpetual futures positioning is already crowded and a liquidation cascade is one headline away.

Sources

• Binance Support
• Binance Support
• PatentPC
• Reddit r/CryptoCurrency