How perps trading fees are calculated
Trading fees on perpetual futures are charged as a percentage of your position's notional value — the full size of your position including leverage — not the margin you posted.
Example: You open a position with $50 of margin at 5x leverage. Your notional position size is $250, and the fee is calculated on $250 — not on your $50. This is why the fee can look larger than you expected: higher leverage means a larger notional position, which means a larger fee in dollar terms.
Maker vs. taker fees
Taker fees apply when your order fills immediately against an existing order (for example, a market order).
Maker fees apply when your order rests on the book and is later filled by someone else. Maker fees are lower than taker fees.
Fee rates are tiered by trading volume. Full fee schedule is here.
Fees are charged on open and close
A round trip involves two fees: one when you open the position and one when you close it. When reviewing your P&L, remember that both legs' fees are deducted.
Funding payments are not fees
Separately from trading fees, open positions pay or receive small funding payments on a regular schedule to keep the contract price anchored to the spot price. Depending on market conditions, funding can be a cost or income for your position. See How Funding Works.
Where to see the fees you paid
Each trade's fee is shown in your trade details and account activity.