Coin-Margined vs USDT-Margined Futures

Coin-margined vs USDT-margined futures differ in what you post as collateral and what you get paid in. On a USDT-margined contract, margin and profit are both in USDT, so a win or loss is a fixed dollar amount per price move. On a coin-margined contract, margin and profit are in the coin itself, such as BTC, so the dollar value of your collateral moves with the market.

This guide compares the two designs using each exchange's own contract data, fetched on 18 Oct 2026. It covers how the maths changes, what the contracts look like on Binance and Bybit, and what to check before you pick one. It does not recommend either.

Coin-margined vs USDT-margined futures: the core difference

A USDT-margined contract is a linear contract. Bybit's help center describes it as a futures contract where USDT is the margin and all profit and loss is calculated and settled in USDT. A coin-margined contract is an inverse contract. It uses the underlying cryptocurrency, such as BTC or ETH, as margin, and profit and loss is settled in that same coin.

Binance uses the names USD-M and COIN-M for the two families. Bybit calls them linear and inverse. The exchange data agrees with the definitions: Binance's BTCUSDT perpetual has USDT as its margin asset, while its BTCUSD_PERP has BTC. On Bybit, BTCUSDT settles in USDT and BTCUSD settles in BTC.

What the table shows:

• Margin and PnL currency: USDT on one side, the coin on the other.
• Size: USDT-margined positions are sized in coin units. Coin-margined positions are sized in contracts with a fixed dollar value.
• Payoff shape: USDT PnL is a straight line in price. Coin-margined PnL is measured in coin, so it follows the reciprocal of price.
• Collateral value: USDT margin keeps its dollar value. Coin margin gains and loses dollar value with the coin.

What the contracts look like on Binance and Bybit

The exchanges publish contract data through their public APIs. This is what we read on 18 Oct 2026.

• Binance COIN-M: BTCUSD_PERP lists BTC as the margin asset and a contract size of 100. ETHUSD_PERP lists ETH and a contract size of 10. These are dollar values per contract, so a 100 USD contract on BTC is sized in dollars while its margin is paid in BTC.
• Binance USD-M: BTCUSDT and ETHUSDT list USDT as the margin asset. Binance also lists BTCUSDC, margined in USDC.
• Bybit inverse: BTCUSD is an inverse perpetual that settles in BTC. Its API shows a minimum order quantity of 1 and maximum leverage of 100x.
• Bybit linear: BTCUSDT is a linear perpetual that settles in USDT, with a minimum order quantity of 0.001 and maximum leverage of 150x.
• Funding: the Bybit API lists a funding interval of 480 minutes (8 hours) for both contracts.

Maximum leverage, limits and listed symbols change, and the real limit on your account depends on position size. Read them from the exchange before you trade.

Worked example: the same long on both contracts

Take a long worth 50,000 USD, opened at a made-up price of 50,000 per BTC. On the USDT-margined contract that is 1 BTC. On a coin-margined contract it is 50,000 USD of contracts.

1. Price rises 10% to 55,000. USDT-margined: 1 BTC x 5,000 = +5,000 USDT. Coin-margined: 50,000 x (1/50,000 - 1/55,000) = +0.0909 BTC, worth 5,000 USD at 55,000.
2. Price falls 10% to 45,000. USDT-margined: -5,000 USDT. Coin-margined: 50,000 x (1/50,000 - 1/45,000) = -0.1111 BTC, worth 5,000 USD at 45,000.

Measured in dollars at the exit price, the results match. Measured in coin, the loss (0.1111 BTC) is bigger than the gain (0.0909 BTC) for the same 10% move either way. That is the curve in the payoff. If you hold BTC and use it as margin on a long, a falling price also cuts the dollar value of the collateral behind that long, so the margin shrinks as the loss grows. A USDT-margined long keeps its collateral value fixed.

For a short on a coin-margined contract the effect works the other way: the position gains coin as price falls, and the BTC you hold as margin is worth less in dollars.

Which one fits which job

• USDT-margined fits traders who think and keep their books in dollars. Position size, risk per trade and PnL are all straightforward, and the position size calculator works directly in those terms.
• Coin-margined fits traders who already hold the coin and want exposure that is denominated in it. It adds a second variable, the coin's own price, to your margin.

Neither design removes risk. Both are liquidated when losses eat the margin, so the margin currency changes how that level moves, not whether it exists. Estimate it with the liquidation price calculator and choose isolated or cross margin deliberately; our guide to isolated vs cross margin explains the trade-off, and our Bybit vs OKX comparison covers account setup on two exchanges.

What to check before you trade

• The margin asset and settle coin of the exact symbol. BTCUSDT, BTCUSDC and BTCUSD are three different contracts.
• The size unit. Coin-margined quantity is in contracts, so convert to dollars before sizing.
• Your collateral. If you hold BTC as margin, a drop in BTC lowers your margin in dollars while your position is losing.
• The fees and funding on your own account tier. This guide does not compare fees, because they depend on your tier and region.
• Whether the product is available in your country.

More explainers are in the Trader's Handbook.

FAQ

What is the difference between coin-margined and USDT-margined futures? A USDT-margined contract uses USDT as margin and settles profit and loss in USDT. A coin-margined contract uses the underlying coin, such as BTC, as margin and settles in that coin.

Is COIN-M the same as an inverse contract? Yes, in practice. Binance calls its coin-margined family COIN-M and Bybit calls its version inverse. Both are margined and settled in the coin.

Which has lower liquidation risk? Neither is safer by design. With coin margin, the dollar value of your collateral also moves with price, which can shift your liquidation level. Check the figure on your exchange for your exact position.

Do coin-margined contracts pay funding? Perpetual contracts pay funding on both designs. Bybit's API lists an 8-hour funding interval for both its inverse and linear BTC perpetuals. Check the contract page for the funding currency and for how expiry contracts work.

Sources: Bybit FAQ on USDT perpetual and expiry contracts, Bybit v5 instruments info, Binance COIN-M futures API docs, Binance COIN-M exchange information, Binance USD-M exchange information.