Current trading fees are published on the Platform Specification page.
Takers and Makers
If you place a limit order that is not executed immediately (e.g., the limit buy is below the best ask or the limit sell is above the best bid), you add liquidity to the order book. If another trader hits your limit order in the order book, the resulting trade will be a maker's trade for you, and you will get a 0.03% rebate.
All market and stop orders remove liquidity from the market and hence incur a taker's fee. The same applies for limit orders that hit the market immediately.
If you send a limit order that executes partially upon hitting the book and then rests in the book, its first part will be treated as a taker order and the remaining part as a maker order.
Fees are paid immediately once your order is filled. The fee currency is always the settlement currency of the Listed Perpetual that you trade. You can always see the exact amounts you’ve paid in fees in your Trade History in the Terminal or Account (check the "Comm." column).
*Note: Maker's rebates are not shown in the Trade History.