# Trading Fee
In order to reduce transaction fees, provide a better trading experience and reward active traders, MEXC Futures implemented a tiered fee rate starting at 16:00 (UTC+8) on October 14, 2020. The details are as follows: Note: Trading volume= opening + closing (all contract types). Trader level is updated every day at 16:00(UTC) according to the user's Futures account wallet balance or the user's 30-day trading volume. The update time may be slightly delayed. When the contract fee rate is 0 or negative, the contract fee discount will not be used. Market makers are not entitled to this discount. These rules form part of the platform user agreement and have the same legal effect as the user agreement.
MEXC offers two kinds of contracts: USDT-M and COIN-M contracts. The USDT-M contract is quoted in USDT and settled in USDT while the COIN-M contract is quoted in USDT and settled in BTC. The principle of calculation is similar but there are some slight differences. Please note that during the calculation, trading fee and other complex components will not be taken into account. The aim is to explain how margin is calculated to users. Margins Explained All MEXC perpetual contracts require a certain amount of margin to open a position. Successful margin trading requires an understanding of the following concepts: Starting Margin: This minimum margin required to open a position. Your starting margin is dependent on margin rate requirements. Maintenance Margin: The minimum margin requirement for maintaining a position below which additional funds will have to be deposited or forced liquidation may occur. Opening Cost: The total amount of funds required to open a position, including the initial margin for opening a position and transaction fees. Margin calculation In perpetual contracts, the order cost is the margin required to open a position. The actual cost is determined by whether the order is executed by a maker or taker because varying fees apply. COIN-M contract: Order cost (margin) = number of open positions * futures size / (leverage multiplier * avg. entry price) USDT-M contract: Order cost (margin) = avg. entry price * number of open positions * futures size / leverage multiplier Examples: COIN-M Contracts If a trader wants to purchase 100 BTC/USDT perpetual contracts at the price of 7,000USD with a leverage multiplier of 25, and the value of each contract is 100 USD, then the margin required = 100x100 / (7000x25 ) = 0.0571BTC. USDT-M Contracts If a trader wants to purchase 10,000 BTC/USDT perpetual contracts at the price of 7,000USDT with leverage multiplier of 25, and the value of each contract is 0.0001BTC, then the margin required = 10000x0.0001x7000/25 = 280 USDT. PNL Calculation PNL calculation includes fee income or expenditure, funding fee income or expenditure, and PNL upon closing a position. Fee The expenditure of the taker = Position value * Taker fee The expenditure of the maker = Position value * Maker fee Funding fee According to the negative or positive funding fee rate and the long or short position held, the trader will pay or receive funding fee. Funding fee = funding fee rate * position value Note: The position value is calculated from the fair price when the funding fee rate is settled. Closing PNL: USDT-M Contract Long position = (exit price - avg. entry price) * number of holding positions * futures size Short position = (avg. entry price - exit price) * number of holding positions * futures size COIN-M Contract Long position = (1/avg. entry price - 1/avg. exit price) * number of holding positions * futures size Short position = (1/avg. exit price - 1/avg. entry price) * number of holding positions * futures size Floating PNL USDT-M Contract Long position = (fair price - avg. entry price) * number of holding positions * futures size Short position = (avg. entry price - fair price) * number of holding positions * futures size COIN-M Contract Long position = (1/avg. entry price - 1/fair price) * number of holding positions * futures size Short position = (1/fair price - 1/avg. entry price) * number of holding positions * futures size For example, a trader purchases 10,000 cont. long for BTC/USDT perpetual contract at the price of 7,000USDT as a taker. If the taker fee is 0.06%, the maker fee is 0.02%, the funding fee rate is -0.025%, and the current fair price is 7000USDT, then the trader shall pay a taker fee of: 7000*10000*0.0001*0.06% = 4.2USDT and the trader pays a funding fee of: 7000*10000*0.0001*-0.025% = -1.75USDT In this situation, the negative value means that the trader receives the funding fee instead. When said trader closes 10,000 cont. BTC/USDT perpetual contract at 8,000USDT, then the closing PNL is: (8000-7000) *10000*0.0001 = 1000 USDT And the closing fee can be calculated as follows: 8000*10000*0.0001*0.02% = 1.6 USDT Hence, the realized PNL of the trader = 1000+1.75-4.2-1.6 = 995.95 USDT