📖 What is Maintenance Margin?
Maintenance margin is the minimum amount of equity you must maintain in your margin account to keep a leveraged position open on an exchange. It is expressed as a percentage of the total position value and is set by the exchange based on the volatility and risk profile of the traded asset.
In simple terms, maintenance margin is the safety buffer that the exchange requires to ensure that your borrowed funds are covered in case the market moves against you. If your account equity falls below this threshold, the exchange will issue a margin call and may liquidate your position to recover the loan.
Understanding maintenance margin is crucial for anyone using leverage. It's the metric that determines how close you are to losing your collateral. By keeping your equity well above the maintenance margin level, you can avoid forced liquidations and trade with greater confidence.
Think of maintenance margin as the "red line" for your margin account. As long as your equity stays above this line, your positions are safe. The moment your equity dips below this line, your positions are at immediate risk of being liquidated by the exchange.
⚖️ Initial Margin vs. Maintenance Margin: What's the Difference?
These two types of margin are often confused. Understanding the difference is essential for proper risk management.
| Feature | Initial Margin | Maintenance Margin |
|---|---|---|
| Definition | Collateral required to open a position | Collateral required to keep a position open |
| Percentage of Position | Typically 5–50% (depends on leverage) | Typically 2.5–20% (lower than initial) |
| When It Applies | At the time of opening the trade | Throughout the life of the position |
| What Happens If Not Met | You cannot open the position | Margin call → Liquidation |
| Relationship | Higher than maintenance margin | Lower threshold (risk buffer) |
| Example | $10,000 position, 10% initial = $1,000 | 5% maintenance = $500 (liquidation at $500 equity) |
Example Illustration
You open a $10,000 position with 10x leverage:
Initial Margin Required: $1,000 (10% of position)
Maintenance Margin: 5% of position = $500
Scenario: The position moves against you, and your equity drops from $1,000 to $400.
Since $400 is below the $500 maintenance margin, your position is now at risk. The exchange will issue a margin call and may liquidate your position if you don't add more collateral or close the trade.
Initial margin is what you need to start a trade. Maintenance margin is what you need to stay in the trade. The maintenance margin is always lower than the initial margin, but if your equity falls below it, liquidation is triggered.
⚙️ How Maintenance Margin Works on an Exchange
When you open a leveraged position, the exchange locks a portion of your funds as initial margin. As the market moves, your equity changes — it increases when the price moves in your favor and decreases when it moves against you.
Your margin level (equity / used margin × 100%) is continuously monitored. The exchange compares your margin level against the required maintenance margin. If your margin level falls below the maintenance margin requirement, the exchange initiates a margin call.
The Maintenance Margin Formula
Variable Maintenance Margin
Some exchanges use a tiered maintenance margin system. This means the maintenance margin percentage increases as your position size grows. For very large positions, the maintenance margin can be significantly higher to account for reduced liquidity and higher risk.
| Position Size (BTC) | Maintenance Margin | Initial Margin |
|---|---|---|
| 0 – 100 BTC | 5% | 10% |
| 100 – 500 BTC | 6.5% | 12% |
| 500 – 1,000 BTC | 8% | 15% |
| 1,000 – 2,000 BTC | 10% | 18% |
| > 2,000 BTC | 12% | 20% |
⛔ What Triggers Liquidation?
Liquidation is triggered when your account equity falls below the maintenance margin requirement. Here's a step-by-step breakdown:
Step-by-Step Liquidation Process
- Step 1: You open a leveraged position with initial margin.
- Step 2: The market moves against your position, reducing your equity.
- Step 3: Your equity approaches the maintenance margin threshold.
- Step 4: The exchange sends a margin call notification, asking you to add funds or close the position.
- Step 5: If you don't act, and your equity falls below maintenance margin, the exchange begins the liquidation process.
- Step 6: The exchange closes your position at the best available market price to recover the borrowed funds.
- Step 7: Any remaining collateral (if any) is returned to you. In many cases, the entire collateral is lost.
Maintenance margin is not the same as liquidation price. Maintenance margin is the equity threshold (in dollars), while liquidation price is the price level of the asset that would cause your equity to fall below maintenance margin. Your liquidation price depends on your entry price, position size, and leverage. Always monitor both.
Maintenance Margin vs. Liquidation Price
Most exchanges display your liquidation price alongside your position details. Use this information to set your stop-loss at a level significantly above the liquidation price. This gives you time to react and close the position manually before the exchange does it for you.
📈 Factors That Affect Maintenance Margin Requirements
Maintenance margin is not a fixed number. Several factors influence the percentage that exchanges require:
Highly volatile assets (like altcoins) have higher maintenance margin requirements to protect the exchange from sudden price swings. Major assets like BTC and ETH have lower requirements.
Larger positions often face higher maintenance margin percentages as exchanges manage liquidity risk. This is common in tiered margin systems.
During extreme volatility or low liquidity, exchanges may temporarily increase maintenance margin requirements to reduce systemic risk.
Cross margin and isolated margin have the same maintenance margin requirements per position, but cross margin pools collateral, making it harder to track individual position risk.
Higher leverage means a smaller initial margin, but the maintenance margin percentage stays the same. However, higher leverage makes it easier to fall below maintenance margin because the position is larger relative to your equity.
Each exchange sets its own maintenance margin requirements. Always check your exchange's margin documentation before trading.
Maintenance margin requirements vary significantly between exchanges. For example, Binance might require 5% maintenance on a BTC position, while Bybit might require 4.5%. These small differences can affect your liquidation price. Always check your specific exchange's rates.
🛡️ How to Manage Maintenance Margin Effectively
Managing your maintenance margin is key to avoiding liquidation. Here are proven strategies:
-
1
Always Know Your Maintenance Margin Level
Before opening a position, check the maintenance margin requirement for that asset on your exchange. Calculate the minimum equity you need to keep the position open.
-
2
Maintain a Healthy Buffer
Don't just meet the minimum — aim to keep your equity at least 2x to 3x above the maintenance margin requirement. This gives you room to withstand normal market fluctuations.
-
3
Add Margin Proactively
If you see a position moving against you, add additional funds to your margin wallet before it reaches the maintenance margin level. This increases your equity and lowers your liquidation price.
-
4
Set Stop-Loss Orders
Place stop-loss orders at a level that limits your loss to an acceptable amount — but always above your liquidation price. This ensures you exit before the exchange forces a liquidation.
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5
Use Lower Leverage
Lower leverage means a smaller position relative to your capital, making it harder to fall below maintenance margin. For example, 2x leverage gives you 50% price drop tolerance, while 10x gives only 10%.
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6
Close Positions Early
If a trade isn't working, close it manually before it hits maintenance margin. This protects your capital and allows you to reevaluate your strategy.
"Never let your position reach the maintenance margin level." Treat it as a hard stop. If you're approaching it, take action — add margin, reduce position, or close the trade. Waiting for the exchange to act is a losing strategy.
❌ Common Mistakes with Maintenance Margin
Even experienced traders make these mistakes. Avoid them to protect your capital:
- Ignoring the maintenance margin percentage. Some traders focus only on leverage and initial margin, forgetting that maintenance margin is the level that actually triggers liquidation.
- Assuming maintenance margin is the same across all assets. Different assets have different maintenance margin requirements. Altcoins typically have higher requirements than major coins.
- Not accounting for interest and fees. Interest and fees reduce your equity over time, slowly lowering your margin level and bringing you closer to maintenance margin.
- Using cross margin without monitoring total risk. In cross margin, a losing position can quickly consume equity from other positions, pushing your entire account toward maintenance margin.
- Waiting for the margin call. A margin call is a warning, not a suggestion. If you wait until you receive a margin call, you may already be too close to liquidation to act effectively.
- Not checking maintenance margin requirements before trading. Always check the requirements for the specific asset and exchange you're using. They can change over time.
Set your own "personal maintenance margin" higher than the exchange's. For example, if the exchange requires 5%, treat 10% as your personal limit. This gives you an early warning and prevents you from ever reaching the exchange's threshold.
📊 Maintenance Margin vs. Margin Level vs. Free Margin
These three concepts are closely related but distinct. Understanding each helps you manage your account effectively.
| Metric | Definition | Indicates | Action |
|---|---|---|---|
| Maintenance Margin | Minimum equity required (dollar amount) | Threshold for liquidation | Keep equity above this level |
| Margin Level | (Equity / Used Margin) × 100% | Overall health of account | Keep above 300% for safety |
| Free Margin | Equity - Used Margin | Available collateral for new positions | Monitor to avoid over-leverage |
In practice, you should monitor all three. Maintenance margin tells you the absolute minimum equity you need to stay in a trade. Margin level gives you a percentage view of your overall account health. Free margin tells you how much capital you have available to open new positions or to absorb losses.
Focus on margin level as your primary dashboard metric. When your margin level drops below 300%, check your free margin and maintenance margin to understand your exact position. This gives you the most complete picture of your risk.