The bottom line: Margin = Position Size / Leverage. Isolated mode only locks margin for a single position, so liquidation only affects that trade; Cross mode uses your entire futures wallet balance as shared margin, allowing profits and losses to offset each other, but liquidation will wipe out your entire account. Beginners should stick to Isolated mode for safety. Account Setup: Register on the Binance Official Website and install the Binance Official App; Apple users can refer to the iOS Installation Guide.
Basic Margin Formula
Calculating futures margin is straightforward:
Initial Margin = Position Size / Leverage
Example:
- Want a 1,000 USDT position with 10x leverage → Requires 100 USDT margin
- Want a 5,000 USDT position with 5x leverage → Requires 1,000 USDT margin
- Want a 100 USDT position with 20x leverage → Requires 5 USDT margin
The higher the leverage, the less margin is required, using the least amount of money to control the largest position. This is the root of high risk and high reward in futures.
Maintenance Margin Rate
Aside from the "Initial Margin" needed to open a trade, futures also have a "Maintenance Margin." When your floating losses cause your margin rate to drop to this level, liquidation is triggered:
| Leverage | Initial Margin Rate | Maintenance Margin Rate | Error Tolerance |
|---|---|---|---|
| 5x | 20% | 0.5% | 19.5% |
| 10x | 10% | 0.5% | 9.5% |
| 20x | 5% | 0.5% | 4.5% |
| 50x | 2% | 0.5% | 1.5% |
| 100x | 1% | 0.5% | 0.5% |
| 125x | 0.8% | 0.4% | 0.4% |
A larger error tolerance means it's harder to get liquidated. Beginners looking for a large margin of error must choose lower leverage.
Isolated Margin Mode
Core feature of Isolated margin: Margin is locked independently for each position.
Example: Your futures wallet has 1,000 USDT. You open an Isolated BTC long, 10x leverage, 1,000 USDT position size, requiring 100 USDT margin. This 100 USDT is "locked" into the trade, leaving 900 USDT free.
If this long position gets liquidated, you only lose that 100 USDT, and the remaining 900 USDT is perfectly safe.
Advantages of Isolated Margin:
- Isolates single-trade risk.
- One liquidation won't wipe out everything.
- Lower psychological pressure.
- Suitable for running multiple strategies simultaneously.
Disadvantages of Isolated Margin:
- Liquidation threshold for a single trade is closer (cannot be saved by floating profits from other positions).
- Lower capital efficiency.
Cross Margin Mode
Core feature of Cross margin: The entire futures wallet balance acts as a shared margin pool.
Example: Your futures wallet has 1,000 USDT. You open a Cross BTC long, 10x leverage, 1,000 USDT position size, taking up 100 USDT initial margin. However, this 100 USDT isn't "locked"; the entire 1,000 USDT is a shared margin pool.
If BTC drops, the floating loss is deducted from the entire 1,000 USDT pool. The liquidation threshold is hit only when the entire 1,000 USDT is lost, making it further away than Isolated.
But once liquidation happens, all 1,000 USDT is gone.
Advantages of Cross Margin:
- Large error tolerance.
- Profits and losses from multiple trades can offset each other.
- High capital efficiency.
Disadvantages of Cross Margin:
- A problem with a single trade can affect the whole account.
- Risk is highly concentrated.
- A black swan event can cause an overnight wipeout.
Direct Comparison
| Aspect | Isolated | Cross |
|---|---|---|
| Margin Locking | Independent per trade | Shared across account |
| Liquidation Impact | Only the specific trade | Entire futures wallet |
| Error Tolerance | Smaller | Larger |
| Risk Isolation | Strong | Weak |
| Best For | Multiple strategies, beginners | Single strategy, veterans |
| Psychological Pressure | Low | High |
Why Beginners Should Use Isolated Margin
The most common beginner mistake: opening a futures position, refusing to stop loss as it drops, thinking "it has to bounce," until all capital is sucked in.
Isolated margin exists to limit this disaster to a single trade. Even if one trade is fully wiped out, your other positions and remaining wallet funds are safe.
Specific scenarios:
- A beginner uses 100 USDT to test futures → Uses Isolated, max loss is 100.
- Monitoring both BTC and ETH → Uses Isolated to manage them separately.
- Fear of black swans → Isolated limits the loss per trade.
Veterans use Cross margin mostly for:
- Short-term hedging (long BTC while shorting ETH).
- Using floating profits to hedge risky positions.
- Having large capital but needing to save on margin usage.
Practical Steps: Switching Margin Modes
How to switch:
- Enter a futures trading pair page (e.g., BTCUSDT).
- Find the "Isolated" or "Cross" button at the top (defaults to Isolated).
- Tap it → A window pops up.
- Select "Cross" or "Isolated" → Confirm.
Switching modes while holding an open position may be restricted; it is recommended to close the position before switching.
Each trading pair is set independently: using Cross for BTC and Isolated for ETH won't conflict.
Adding/Removing Margin (Isolated Only)
In Isolated mode, you can manually add margin to save a position. When close to liquidation:
- Open the position details.
- Select "Add Margin".
- Enter the amount (drawn from your futures wallet balance).
- Confirm.
Adding margin increases your maintenance margin rate and pushes the liquidation price further away from the current price.
However, do not make a habit of rescuing liquidated positions—the market will force you to do it a hundred times until you're wiped out. Cut your losses when necessary.
The Cross Margin Liquidation Threshold
Liquidation in Cross mode is determined by the account margin ratio:
Account Margin Ratio = Account Equity / Sum of Maintenance Margin for All Positions
As long as this ratio is ≥ 100%, you won't be liquidated. Once it drops below 100%, it triggers simultaneous forced liquidation for all positions, zeroing your account.
This is why Cross margin liquidations are devastating—it's not just one trade, it's everything.
Common Misconceptions
Myth 1: Cross is safer. False. The liquidation point for a single trade is further away, but if it hits, the whole account blows. Isolated hits its threshold sooner but only affects that trade.
Myth 2: Isolated margin locks your funds. False. The margin is "logically locked" for that trade and doesn't affect your ability to use the rest of your futures wallet.
Myth 3: Margin = Leverage. False. Margin is the monetary amount; leverage is a multiplier. They are connected by the position size.
Myth 4: Modes can be switched frequently. You can switch, but doing so with open positions is restricted and risky. Stick to one mode per trading pair.
A Complete Comparison Example
Assume an account has 1,000 USDT, opening two futures positions:
Case A: Cross + Cross
- Position 1: BTC Long 5,000 USDT, 10x, margin 500.
- Position 2: ETH Long 5,000 USDT, 10x, margin 500.
- The entire account shares the 1,000 USDT margin.
- BTC drops 8% (floating loss 400), ETH rises 5% (floating profit 250).
- Net floating loss is 150, account balance is 850.
- Overall margin ratio is still healthy, no liquidation.
Case B: Isolated + Isolated
- Position 1 (BTC): 100 USDT margin, 1,000 USDT size.
- Position 2 (ETH): 100 USDT margin, 1,000 USDT size.
- BTC drops 8% → Floating loss 80, only 20 USDT left (near liquidation).
- ETH rises 5% → Floating profit 50, but it cannot save BTC (they are independent).
- If BTC drops slightly more, it liquidates, losing only that 100.
Conclusion: Cross provides capital mutual aid; Isolated provides risk isolation. They are two different philosophies.
FAQ
Q: Which mode has cheaper fees? A: Fees are identical. They are charged based on position size (maker 0.02% / taker 0.05%). Margin mode doesn't affect rates.
Q: Can I go long and short simultaneously? A: Yes. Binance supports "Hedge Mode," though the default is "One-Way Mode." Change this in "Preference" settings.
Q: What if I don't have enough margin to open a new trade? A: Transfer funds from your spot wallet to futures, or reduce the position size, or increase the leverage.
Q: Can I keep adding margin to an Isolated position? A: Yes. In the Isolated position details, there's an "Add Margin" button to pull funds from your futures wallet.
Q: Why do different leverages have different margin rates? A: Binance adjusts maintenance margin rates dynamically based on a "position tier system." Larger positions require higher maintenance thresholds.
Q: Will multiple Cross positions affect each other? A: Yes. All Cross positions share margin, so a massive profit on one can offset a massive loss on another.
Q: What if I wake up to find I've been liquidated? A: Check the time and price of liquidation, look at funding fees, and review whether you used high leverage + long holding times. It's irreversible; learn to control leverage next time.
Q: Are the margin modes the same in Mock Trading? A: Exactly the same. Mock trading replicates real trading rules flawlessly, just using test funds.
For beginners, Isolated mode + 5x leverage + strict single-trade stop-loss is the safest entry setup. Always consider the "worst-case scenario" before opening an order.