How Is the Liquidation Price Calculated? What to Do When Your Margin Runs Low
The liquidation price is the trigger price at which Binance's futures system forcibly closes your position — determined by position size, margin, leverage, and the maintenance margin rate. This note uses a real 1,000 USDT BTC position to test liquidation price calculations under both Cross and Isolated margin modes, and explains what to do when your margin runs low.
The one number that scares futures beginners the most is the "liquidation price." This time we ran a live test on the Binance official site using a 1,000 USDT BTC perpetual futures position, calculating the liquidation price under both Cross and Isolated margin modes, and comparing the numbers Binance actually displayed against what we worked out by hand to verify the formula. Short version up front: liquidation price and "getting blown up" are the same thing — Binance's interface calls it the liquidation price, traders informally call it getting liquidated. The core logic is "force-close the position once account equity drops to the maintenance margin level," and the calculated result varies dramatically depending on leverage and mode (Cross vs. Isolated).
What the liquidation price actually is
The liquidation price is the price at which Binance's system forcibly closes your futures position. The moment the market price touches this number, the system doesn't ask for your consent — it closes the position at market price immediately.
Why does this mechanism exist? Because futures trading is leveraged — with just 100 USDT in margin, you might be holding a position worth 1,000 USDT. If the price moves 10% against you, your margin would theoretically hit zero. If positions weren't force-closed, further price movement would leave you owing the exchange money — something Binance, and every exchange, disallows. Liquidation exists specifically to prevent that kind of negative balance.
Maintenance Margin Rate (MMR)
To calculate the liquidation price, you first need to understand the "maintenance margin rate" (MMR). This is the minimum margin ratio Binance requires — once a position's margin ratio drops below this number, liquidation is triggered.
The maintenance margin rate isn't fixed — it's tiered by position size. Some of the tiers for the BTC USDT perpetual contract look like this:
| Position notional value | Max leverage | Maintenance margin rate | Maintenance margin amount |
|---|---|---|---|
| 0 - 50,000 USDT | 125x | 0.40% | 0 |
| 50,000 - 250,000 | 100x | 0.50% | 50 USDT |
| 250,000 - 1,000,000 | 50x | 1.00% | 1,300 USDT |
| 1,000,000 - 5,000,000 | 20x | 2.50% | 16,300 USDT |
| 5,000,000 - 20,000,000 | 10x | 5.00% | 141,300 USDT |
You can see that the larger the position, the higher the maintenance margin rate and the lower the max leverage. This is designed to control liquidation risk on large positions.
Most retail traders fall into the first tier (0-50,000 USDT), with a maintenance margin rate of 0.40% — simple and clean.
Calculating the liquidation price in Isolated margin
Isolated Margin is the more intuitive mode: you allocate a separate chunk of margin to a single position, and if it's wiped out, only that position gets liquidated — the rest of your account balance is untouched.
The formula
Long liquidation price = entry price × (1 - 1/leverage + maintenance margin rate)
Short liquidation price = entry price × (1 + 1/leverage - maintenance margin rate)
Real test data
We opened a BTC USDT perpetual long this time, entry price 95,200, 10x leverage, using Isolated margin:
- Liquidation price = 95,200 × (1 - 1/10 + 0.004) = 95,200 × 0.904 = 86,060.8 USDT
The liquidation price Binance's interface displayed was 86,063 (the small difference comes from a small liquidation fee that also gets deducted) — essentially matching our calculation.
What about 50x leverage instead?
- Liquidation price = 95,200 × (1 - 1/50 + 0.004) = 95,200 × 0.984 = 93,676.8 USDT
Going from 10x to 50x leverage pushes the liquidation price up from 86,060 to 93,677 — meaning the price only needs to drop 1.6% to trigger liquidation. This is why high leverage is dangerous.
What happens after an Isolated position is liquidated
The moment liquidation happens, Binance closes the position at market price. The position's margin is handled as "deduct the maintenance margin plus the liquidation fee, then return whatever's left to the account." If extreme market volatility causes the actual closing price to be worse than the liquidation price, the shortfall is covered by Binance's "insurance fund" — which is why Binance skims a small amount from every liquidation into that fund.
Under normal conditions, an Isolated position getting liquidated costs you, at most, the margin allocated to that position — the rest of your account balance is unaffected.
Calculating the liquidation price in Cross margin
In Cross Margin mode, your entire futures account balance acts as margin for the position. The liquidation price isn't fixed — it moves dynamically with your account balance and other open positions.
The formula (simplified)
Liquidation price = entry price × (1 - (account equity - maintenance margin amount) / position notional value) (for longs)
Real test data
Same setup — a BTC USDT perpetual long with 1,000 USDT notional value, entry price 95,200, 10x leverage. But this time using Cross margin, with a total futures wallet balance of 5,000 USDT.
The liquidation price Binance's interface displayed was 56,173 USDT.
Why so low? Because the entire 5,000 USDT balance in the account is available as margin for this position. Even if BTC drops to 56,173, the account's equity can still cover the maintenance margin required for this 1,000 USDT notional position.
But Cross margin has a hidden risk: if you have multiple positions open at once, a large loss on one can drag the liquidation prices of the others closer to the market. In an extreme scenario, one position getting liquidated first causes account equity to drop sharply, immediately pushing the liquidation prices of the remaining positions higher — potentially triggering a chain of liquidations.
Cross vs. Isolated margin comparison
| Comparison | Isolated | Cross |
|---|---|---|
| Margin | Allocated independently per position | Shared across the whole account balance |
| Liquidation price | Fixed, tied only to this position | Floating, affected by other open positions |
| Maximum loss | The margin on this position | The entire futures account balance |
| Flexibility | Can add margin to a single position | Automatically covered by account balance |
| Best suited for | Beginners, controlling per-trade risk | Experienced traders, portfolios of positions |
| Chain-liquidation risk | None | High |
Beginners are strongly advised to use Isolated margin — the liquidation price is clear and the maximum loss is controlled. Consider Cross margin only once you're comfortable managing the hedging relationships between multiple positions.
What to do when your margin runs low
Insufficient margin comes with a few warning signals, in increasing order of severity:
Signal 1: margin ratio warning
Binance sends an App notification and email when the margin ratio drops to a certain threshold (usually 2-3x the maintenance margin rate). At this point you still have plenty of room before liquidation — this is the best time to act.
Signal 2: margin ratio crosses the danger line
Once the margin ratio approaches 100% (nearing the maintenance margin rate), you're very close to liquidation. Binance's interface highlights this in red. If you don't act, the next bit of volatility could trigger liquidation.
Signal 3: already liquidated
You receive a "position force-closed" notification — the position has already been liquidated and the margin settled according to the rules.
Fix 1: add margin (Isolated mode)
In Isolated mode, you can add margin to a single position specifically. Here's how:
- Go to the "Positions" tab on the futures page
- Find the position and tap the "Adjust" button next to the margin amount
- Enter the amount you want to add
- Once confirmed, the liquidation price shifts immediately
We tested this: a 1,000 USDT BTC long with 10x leverage had an initial liquidation price of 86,063. After adding 500 USDT of margin, the liquidation price moved to 81,250 — giving us an extra 4,813 USDT of downside room.
Fix 2: reduce your position
Reducing position size also lowers liquidation risk. Closing half the position keeps the margin the same while halving the notional value, giving the liquidation price more room to move.
Fix 3: transfer from your spot account
If your futures account balance is insufficient, transfer USDT in from your spot or funding account. For the specific transfer steps, see our note What's the Difference Between Transfer and Internal Transfer.
Fix 4: switch to Cross margin
If an Isolated position is about to be liquidated, you can switch it to Cross margin so the rest of your account balance can help absorb the pressure. But this puts your entire account balance on the table, so proceed carefully.
A real timeline from opening a position to getting liquidated
We deliberately opened a small position (10 USDT margin, BTC 100x leverage, long) and tracked the entire liquidation process:
| Time | BTC price | Account equity | Margin ratio | Status |
|---|---|---|---|---|
| T+0 opened | 95,200 | 10.00 USDT | 1000% | Safe |
| T+12min | 94,800 | 5.79 USDT | 580% | Unrealized loss |
| T+45min | 94,500 | 2.64 USDT | 264% | Warning |
| T+58min | 94,300 | 0.55 USDT | 55% | Red zone |
| T+62min | 94,250 | 0.02 USDT | < maintenance line | Liquidation triggered |
| T+62min10sec | 94,248 | 0 | - | Liquidation complete |
A few things happened in that final second: the system closed the position at market price, deducted roughly 0.05 USDT in liquidation fees, and left almost nothing remaining. If the market happens to be moving violently at that moment and the close price ends up worse than the liquidation price, the shortfall is covered by the insurance fund.
The whole process took 62 minutes, the price only dropped 1%, and the 10 USDT margin went to zero. That's the real cost of 100x leverage.
Liquidation uses "Mark Price," not "Last Price"
When Binance triggers a liquidation, it uses the "Mark Price," not the "Last Price."
- Last Price: the price of the most recent trade executed on the futures market
- Mark Price: a weighted calculation based on index prices from multiple spot exchanges plus the perpetual contract's fair price
Why use Mark Price? Because Last Price is easy to manipulate with a "wick" — a large trader can slam the price down for a few seconds and trigger liquidations across leveraged positions. If liquidations were based on Last Price, small traders would get wiped out constantly. Using Mark Price filters out brief, extreme spikes and is fairer.
In practice, you'll notice the Last Price and Mark Price on the futures chart sometimes differ by tens of dollars — whether liquidation triggers depends on the Mark Price. You can switch between displaying Mark Price or Last Price in the settings in the top-right corner of the Binance App's futures page.
How to estimate your liquidation price before opening a position
The Binance order panel has an "Est. Liquidation Price" display. The moment you enter your position size, leverage, and margin, it shows in real time what the liquidation price would be if you opened the position right now at the current price.
We'd recommend glancing at this estimate every time before opening a position, and asking yourself one question: "If the price moves against me all the way to this liquidation price, can I live with that?"
If the answer is no, reduce your leverage or position size. This 5-second check can prevent 80% of liquidation incidents.
If you're just getting started with futures, run a few complete open-hold-close cycles with a small amount (10-50 USDT) first, using a real account to get hands-on familiarity with concepts like maintenance margin rate, liquidation price, and adding margin. The official Binance App's futures page has a "Demo Trading" feature you can practice with at zero cost. For more on setting up futures trading, see the beginner notes in the Glossary category.
FAQ
Q: Does all your margin get wiped out after liquidation? A: Usually not. The system calculates it as "margin - maintenance margin - liquidation fee = actual loss," and returns whatever small amount remains to your account. But if extreme market volatility causes the closing price to come in far below the liquidation price, there may not even be enough left to cover the maintenance margin — leaving zero or a negative amount (a negative amount is covered by the insurance fund).
Q: What does it mean if the liquidation price shows "-"? A: It means the current position is far from being liquidated — your account equity is more than enough to support the position, so it can't realistically be liquidated at any reasonable price. This usually happens with low leverage plus ample balance, such as 2x leverage combined with Cross margin and a large amount of margin.
Q: Can I stop the system from liquidating me? A: Yes — by adding margin, reducing your position, or closing it yourself before liquidation triggers. But once the mark price touches the liquidation price, the liquidation process begins automatically, completes within seconds, and cannot be stopped.
Q: Can I still open positions after being liquidated? A: Yes. Liquidation doesn't freeze your account — any remaining futures balance can still be used to trade. But if your futures account balance has hit zero, you'll need to transfer funds in from your spot or funding account. See What's the Difference Between Transfer and Internal Transfer for the specific rules.
Q: Is the liquidation calculation different between USDⓈ-margined and coin-margined futures? A: Yes. USDⓈ-margined futures use USDT as margin, so the liquidation price, quoted in USDT, is intuitive. Coin-margined futures use crypto like BTC as margin, making the liquidation logic more complex because the value of the margin itself is also fluctuating. See What's the Difference Between USDⓈ-Margined and Coin-Margined Futures for more detail.
Q: How much is the liquidation fee? A: The liquidation fee on BTC USDT perpetuals is roughly 0.5% of the position's notional value — about 10 times higher than the normal Taker fee (0.05%). This is meant to discourage getting liquidated and encourage traders to close positions proactively instead of waiting to be wiped out.
Q: Is liquidation on Demo Trading the same as on a real account? A: Essentially, yes. Binance's Demo Trading uses real market data and the same liquidation rules — the only difference is you're trading with virtual USDT. We'd recommend beginners run through 5-10 full liquidation cycles on Demo Trading before going live.
Q: Does the liquidation price change over time? A: Yes. Funding rate deductions reduce account equity over time, which in turn pushes the liquidation price closer to the market (for longs). So the liquidation risk on a long-held position increases over time — which is exactly why it's not a good idea to hold futures positions long-term.