Grid Bot Fee Math: When Is Your Grid Actually Profitable?
A grid bot's edge is the spacing between levels; its cost is the round-trip fee on every completed cycle. Because it cycles constantly, no strategy is more sensitive to fees — a spacing that backtests green at one fee rate is a slow leak at another. Here is the break-even math, worked through, and where a rebate changes the verdict. To run your own numbers, use the grid fee calculator.
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The short answer
Each completed grid cycle earns the step and pays two fees — one on the buy leg, one on the sell. So the rule is simple: your grid step must clear the round-trip fee, and comfortably. With maker fills on Bybit, OKX or Bitget futures (0.02% per side), the round trip is 0.04%. A common rule of thumb is to keep the step at 2–3× the round trip — below that, one missed fill or a little slippage eats the cycle.
A fee rebate moves this line directly: at 40% back the effective round trip drops to 0.024%, and at the 50% tier to 0.02%. Every spacing between the old and new break-even flips from losing to viable.
The math, in one paragraph
Per side, your fee rate is maker × (1 − t) + taker × t, where t is the share of fills that cross the spread as taker. The round trip is twice that. Net per cycle is step − round trip; with a rebate at rate r it is step − round trip × (1 − r). The break-even step is the round trip itself — round trip × (1 − r) once the rebate is in. That last multiplication is the entire argument: it is the only variable in the formula you can change without changing how the bot trades.
A worked example
Say the bot runs $500 per level on Bybit futures with a 0.25% step, and 10% of fills end up taker. Per side that is 0.0235%, so the round trip is 0.047%. Each cycle grosses $1.25 and pays $0.235 in fees — $1.015 net. With a 40% rebate the fee cost drops to $0.141 and the cycle nets $1.109, about 9% more per cycle for the identical trades.
Now tighten the step to 0.10%: each cycle grosses $0.50 against the same $0.235 of fees — $0.265 net, with fees taking nearly half the gross. The rebate brings that cycle to $0.359, about 35% more. The tighter the grid, the larger the share of the outcome the rebate decides — which is why it matters most in exactly the ranging, tight-spacing conditions grids are built for.
Why taker fills quietly kill grids
Grid orders rest on the book, so the strategy is maker by construction — 0.02% a side. But everything the bot does outside the grid crosses the spread: stop triggers, rebalancing after a breakout, closing the range manually. Those legs pay 0.05–0.06%, roughly three times the maker rate, and a handful of them can undo dozens of clean cycles. Before widening the grid to fix a leak, check the fill log — the leak is often the taker share, not the spacing.
Fees are the input you control
You cannot control whether the market stays in range. You can control what each cycle costs. Signing up with the code REBATLY links your account to Rebatly's registered affiliate program: the exchange pays its usual commission, most of it is passed back to you, and your fee rate at the exchange is unchanged. The rebate is up to 50% on Bybit and up to 40% on OKX and Bitget, tiered on monthly volume — which grid bots accumulate quickly — calculated daily and paid the next day in USDT. Check your own spacing in the grid fee calculator.
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$10M+ rebates paid · Paid daily in USDT · No password or API keys, ever
Already signed up? Message @rebatly and we'll confirm you're linked.
August 15, 2026 — published. Fee rates follow the exchange fee schedules as verified June 11, 2026.
FAQ
What grid step do I need to break even?
At minimum the round-trip fee: with all-maker fills that is 0.04% on Bybit, OKX or Bitget futures, and 0.024% with a 40% rebate. In practice keep the step at 2–3× the round trip so slippage and missed fills don't erase the margin.
Do grid bot fills qualify for the fee rebate?
Yes — every fee-bearing trade qualifies, maker and taker alike. A grid bot's fills are ordinary limit and market orders as far as the exchange is concerned.
Does the rebate require API keys or access to my bot?
No. The link is your public UID through the referral program — no API keys, no passwords, no access to funds or positions. The bot runs exactly as before.
Which exchange has the lowest effective fees for grids?
Maker rates are identical (0.02%), so the rebate ceiling decides it: up to 50% on Bybit against up to 40% on OKX and Bitget gives Bybit the lowest effective round trip for most setups. Run your own mix in the guides and the calculator before committing.
How and when is the rebate paid?
Calculated daily from the fees you actually paid and sent in USDT to your exchange account the next day, usually between 04:00 and 12:00 UTC. The minimum payout is 1 USDT; smaller days accumulate and go out once the total reaches it.