A maker order rests on the order book and adds liquidity; a taker order executes against existing orders. Maker fees are often lower, but a missed fill, adverse selection or slower execution can cost more than the fee difference.
Transparent formula
Fee = filled notional × fee rate; execution cost = fee + spread + slippage + missed-fill cost
Worked example
On a
Use this sequence
- Check whether the order will rest on the book.
- Measure the fee difference in dollars.
- Compare fill probability and urgency.
- Review post-only and cancellation rules.
Common mistakes
- Assuming every limit order is a maker order.
- Ignoring partial fills and order queue position.
- Chasing maker rebates in a fast market.
Verify next
Frequently asked questions
Can a limit order be a taker order?
Yes. If its price crosses the book and executes immediately, it removes liquidity and is charged as taker.
What does post-only do?
It prevents the order from executing immediately as taker; the exchange cancels or reprices it according to platform rules.
Which is better for beginners?
Use the order type that matches the execution plan. A small fee saving should not replace a clear entry and risk rule.
This page provides calculation and research frameworks, not investment, legal or tax advice.