Your position hasn’t changed, so why is there another fee on your bill?
When trading perpetual contracts, you may incur funding fees in addition to trading fees when orders are filled.
These are fees periodically paid between long and short positions. If your position meets the settlement requirements for a given period, you may receive or pay a funding fee even if you haven’t added to or reduced your position.
When the funding rate is positive, longs pay shorts; when it’s negative, shorts pay longs.

For example, with a USDT-margined perpetual contract, suppose your position is worth 10,000 USDT at settlement and the funding rate for that period is positive 0.01%. Longs would pay 1 USDT, and shorts would receive 1 USDT.
This is just a calculation example and does not represent the actual funding rate.
Note that funding fees are calculated based on the position value, not by multiplying your margin directly. Check the settlement interval and funding rate for the specific contract—don’t assume they’re always set every 8 hours.
Receiving a funding fee doesn’t necessarily mean the trade as a whole was profitable. Price movements and trading fees still affect the final result.