How much does a guaranteed stop-loss cost on crypto futures?

What you are paying for

A normal stop-loss becomes a market order when it triggers, so in a fast market it can fill well beyond the trigger price — that gap is slippage, and you carry it (see slippage vs trading fee). A guaranteed stop-loss moves that risk to the exchange. BingX says that with Guaranteed Price it bears the risk of slippage for you, and the close happens at the preset stop-loss price. MEXC describes its guaranteed stop-loss as a paid risk-management feature that guarantees a fill at the trigger price you set.

How the fee is calculated

• Charged only when it triggers. BingX does not charge upfront; a fee applies only when the protection is actually used. MEXC likewise charges only when the order triggers and fills.
• Based on the filled value. BingX's formula is filled amount × filled price × Guaranteed Price fee rate — the same base as a trading fee, at a separate rate.
• Rate set by the exchange. MEXC says the rate differs by trading pair and is shown on the trading page; BingX reserves the right to adjust the fee or suspend the feature for specific pairs. Read the rate on the order screen before you enable it — announcements age quickly.
• Discounts. BingX gives VIP users a number of free uses per day, rising with VIP level; regular users pay the fee.

The close is still a trade, so check your trade history for both the trading fee on the closing fill and the guaranteed-price charge.

Limits to know before you rely on it

• Perpetual futures only on BingX, and only some pairs on both exchanges — availability shows on the trading page.
• Stop-loss direction only. Since November 2023, BingX applies Guaranteed SL only to genuine stop-losses: below the average open price for a long, above it for a short.
• Order type. On MEXC it works only with a market stop-loss and only with the last price as the trigger — not the fair, mark or index price.
• Editing. BingX says Guaranteed SL parameters cannot be changed after the order is placed; MEXC lets you modify or cancel it from the TP/SL settings.
• Misuse. BingX may restrict or suspend accounts that use the feature for arbitrage.

When it is worth it

The fee is a known cost; the slippage it removes is not. Compare the two in the same unit — basis points of the position value. On a small position in a liquid pair, a normal stop often fills close to the trigger and the fee buys little. On a large position, a thin pair, or around scheduled news, slippage on a market stop can be many times the fee. A slippage limit on a normal stop is the free alternative, but it protects the price, not the exit: if the market jumps past the limit, the stop waits as a limit order and the position stays open. Liquidation is not covered by any of these — see liquidation fees.

Does a fee rebate cover it?

A fee rebate is calculated from the trading-fee commission the exchange reports. The guaranteed-price fee is a separate charge for price protection, so don't count on it being rebated; the trading fee on the closing fill is the part a rebate is built on. When you plan a trade's break-even, add the guaranteed-price fee to your exit costs — see break-even price with fees.