KCEX futures fees explained: what 0% maker / 0.01% taker saves you, and what it doesn't (notional, post-only, funding)

Live KCEX BTC/USDT perpetual board, captured Oct 18 around 10:24 PM ET: last 82,366.9 (+0.91%), Index 82,393.4, Mark 82,366.9, funding +0.0092% with 05:35:02 on the countdown, 24h range 80,636.1 to 82,581.4, 15m chart with the order book on the right. Every resting bid and ask in that book is someone choosing to be a maker.

KCEX posts a 0% maker / 0.01% taker baseline for USDT-M futures placed manually on the website and app, with pair-specific exceptions possible. That is a strong starting number. It is also the number people misread most. Here is what it does and does not save you.

Fees are charged on notional, not margin

Say you put up $2,000 and run a $20,000 position at 10x. Fees are calculated on the $20,000 you actually traded:

• Open as taker at 0.01%: $2
• Close as taker at 0.01%: another $2
• Open or close as maker at 0%: $0 on that fill

Leverage changes how much collateral you need and how close liquidation sits. It does not shrink the fee base. Every fill is charged on its own notional at the rate that applied at that moment, and partial fills are charged separately.

Maker is cheaper, but you give up certainty

A maker order rests in the book and waits. You skip the taker fee, but you trade away the guarantee of execution:

1. The order may never fill while price runs away from you.
2. It tends to fill most often right before price moves against you. That is adverse selection, and on a bad fill it can cost far more than any fee saved.

Hypothetical: you bid at 100 and offer at 100.10. If both fill, you capture 0.10 per unit. If the bid fills and price then drops to 99.50, that spread is gone many times over. A tight book is not a guaranteed return.

Test how post-only behaves

A post-only instruction is meant to stop an intended maker order from crossing the spread and filling as taker. Venues handle a crossing post-only order differently (some reject it, some adjust it), so check with a small order on KCEX before you rely on it. If you assume every limit is a maker fill, aggressive limits that execute immediately will quietly cost you the 0.01%.

Funding is not a fee

Funding is the periodic payment between longs and shorts that keeps the perp near the index. It is separate from the maker/taker commission. On this capture funding was +0.0092%, so longs pay shorts at the next stamp if the rate holds. A zero maker fee does nothing about that.

• An 8h rate and a 1h rate are not directly comparable without adjusting for frequency.
• One extreme funding print annualized is not a yield. Rates flip sign and size.
• Short-lived orders can still leave you holding inventory through a stamp.

Inventory is the hidden cost

If you quote both sides, you do not control which side fills first. Bids fill in a selloff and you end up long; offers fill in a rally and you end up short. Sometimes the only safe exit is an aggressive taker order, so budget for some 0.01% fills and for slippage on those exits. Never use a fee discount as a reason to raise leverage.

Manual only for now

KCEX does not currently offer API trading access, so the 0% / 0.01% baseline applies to manual trading on web and app. If you were planning a bot that quotes all day, that is out of scope on KCEX right now.

Before you trade

1. Confirm the exact contract and its current fee on the order panel (pair exceptions exist).
2. Do the math on notional, open and close separately.
3. Decide in advance when you will cross the spread as taker.
4. Note the funding rate and countdown on the header.
5. Size for the worst-case move, not the fee you saved.

A zero maker fee removes one cost. It does not make passive trading free money.