Maker fee

Maker fee is what the venue charges on a limit order that lands in the book and waits to be filled. Makers contribute liquidity, so the venue charges them less — or actively pays them via a rebate.

The logic

A venue’s book is alive only as long as limit orders sit on it. Without them, markets thin out: spreads widen, taker executions get worse, and volume falls. So venues are economically motivated to pay makers — either with a low fee or a negative one.

Maker rebate

At top VIP tiers some venues (Bybit, OKX, dYdX) offer negative maker fees:

• You post a 1-BTC limit order.
• On fill, the exchange does not deduct — it credits 0.01% (≈10 USDT).

That is the staple business model for professional market makers: spread + rebate × volume = repeatable profit.

A limit order is not always a maker

If your limit order is priced such that it fills immediately against an existing book entry (crosses), the venue treats it as a taker fill — even though the type is “limit”. To be a maker:

• The order must rest in the book before filling.
• In post-only mode the venue guarantees rejection if the order would cross — preventing accidental taker conversions.

On AMM DEXs

A pure AMM has no maker/taker split. Still:

• Limit orders on STON.fi and Storm are implemented via keeper contracts — there the split returns, but the user pays a keeper fee rather than a classic maker fee.
• Concentrated liquidity (CLMM) — an active LP inside a range behaves like a maker, and the protocol can offer different fee tiers per pair.

Practical advice

• Trade often and at size? Compute fee savings over a year. Shifting from 100% taker to 70% maker on 100k USDT/day can save thousands.
• Maker rebates are real but require volume and discipline (limits aren’t markets).
• At small size the maker/taker gap rarely justifies the workflow overhead.

Maker fee is the price of patience and leaving liquidity in the book. For some passive traders it ends up cheaper than poking the market with takers.