Cross vs Isolated Margin: Which Should You Use?

Every crypto futures exchange asks you to pick a margin mode - cross or isolated - before you trade. The choice changes how much of your money is at risk and where you get liquidated. Here's the plain-English difference and how to decide.

Isolated margin

With isolated margin, only the margin you assign to a position can be lost. If the trade gets liquidated, that's the most you lose - the rest of your account is untouched. The trade-off is that your liquidation price sits closer to entry, because only that slice of money is backing the position.

Best for: beginners, high-conviction single trades, and anyone who wants a hard cap on the downside of one position.

Cross margin

With cross margin, your entire available balance backs the position. That pushes the liquidation price further away - a winning balance can absorb a bigger drawdown before liquidation. But the danger is real: a single runaway trade can drain your whole account, and multiple positions share the same collateral.

Best for: experienced traders hedging multiple positions, or those who actively manage margin and understand the account-wide risk.

How it affects liquidation

Margin mode directly moves your liquidation price. Our calculator uses the conservative isolated-margin estimate, which is the right default for risk planning. Whatever mode you choose, run the numbers first.

Quick rule of thumb

• Learning, or one big trade you want to contain → isolated.
• Hedging several positions and actively managing margin → cross.
• Either way, keep leverage modest and always know your liquidation price.

Side by side - the whole difference in one table

The same trade in both modes - worked example

Account: $1,000. You open a $100-margin long at 10× on BTC at $60,000 (position $1,000, liquidation math uses ~0.5% MMR).

• Isolated: liquidation sits near $54,300 (−9.5%). BTC drops 12% - you lose the $100 margin, and the remaining $900 in the account is untouched.
• Cross: the whole $1,000 backs the trade, so the SAME position survives the 12% drop - liquidation only comes near a ~99% effective drawdown of usable balance. Sounds safer, until the drop keeps going: at −25% you have silently lost $250 of account equity on a trade you "assigned" $100 to. Cross does not reduce risk - it defers the stop-out by pledging money you never consciously put at risk.

The trap in one sentence: isolated caps the damage per trade; cross quietly re-prices every open position against your whole account, and a single runaway loser can consume the margin your other positions were counting on - cascading liquidations across the book.

Which one should you use?

• Learning or trading directionally: isolated, always. The loss cap is the point. Every calculator on this site and the Paper Trade terminal models isolated for this reason.
• Hedging (long spot, short perp; or a pairs book): cross earns its keep - offsetting positions share margin efficiently and the netting is the feature.
• High leverage + cross is the account-killer combination. 50× with your whole balance as backstop means one wick decides everything at once. If you need cross, drop the leverage.

Model both with the cross-margin calculator and the isolated liquidation calculator before committing real margin.

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