The answer
To compare two exchanges, keep the trade identical and calculate each venue’s buy fee and sell fee separately. Then compare total fees, or compare net profit after both fees. For the same trade, the difference in total fees is buy value × the difference in buy rates + sell value × the difference in sell rates. In a hypothetical example, a $1,000 purchase and a $1,500 sale cost $2.50 in fees at 0.1% on each side, versus $5.00 at 0.2% on each side. The second fee schedule costs $2.50 more on this round trip, so the modeled net result is $2.50 lower, all else equal. These rates are illustrative inputs, not published rates for any exchange.
Make the comparison like for like
A fee comparison is useful only when both calculations use the same trade assumptions. Hold constant the asset, quantity, buy price, sell price, order type and fee currency. Change only the fee rates you are comparing. If the trade size or prices differ between rows, the result mixes trading performance with fee differences and no longer isolates the fee effect.
Use the rate that would apply to your own order type and account tier. A maker rate and a taker rate may differ, and an exchange’s fee schedule can depend on conditions such as volume or account status. This page does not state what any named venue currently charges. Check the fee information shown for your account and the order you plan to place, then enter those values as separate buy and sell rates.
Also compare rates on the same basis. If one number is a percentage and another is a fixed charge, convert neither by guesswork: calculate the actual fee each venue would charge for this particular order using its own displayed terms.
Worked example: same trade, two fee schedules
Assume, for illustration only, a purchase of 0.02 BTC at $50,000 per BTC and a later full sale at $75,000 per BTC. The purchase value is 0.02 × $50,000 = $1,000. The sale value is 0.02 × $75,000 = $1,500. No market data is being used; these are hypothetical values to show the arithmetic.
Assume Exchange A charges 0.1% for the buy and 0.1% for the sale. Its buy fee is $1,000 × 0.001 = $1.00. Its sell fee is $1,500 × 0.001 = $1.50. Total fees are $2.50. Under the quote-currency fee assumption below, total investment cost is $1,001.00, sale proceeds after the fee are $1,498.50, and net profit is $497.50.
Assume Exchange B charges 0.2% on both sides. Its buy fee is $1,000 × 0.002 = $2.00, and its sell fee is $1,500 × 0.002 = $3.00. Total fees are $5.00. Investment cost becomes $1,002.00, after-fee sale proceeds are $1,497.00, and net profit is $495.00. With these inputs, Exchange B’s combined fee is $2.50 higher and its modeled net profit is $2.50 lower.
Why the fee difference uses two trade values
The buy fee applies to the purchase value, while the sell fee applies to the sale value. In the example, those bases are $1,000 and $1,500. The rates differ by 0.1 percentage point on each side, so the fee difference is $1,000 × 0.001 on the buy plus $1,500 × 0.001 on the sale: $1.00 + $1.50 = $2.50.
This is why multiplying the rate gap by only the original purchase amount can understate the difference for a completed round trip. When the sale value is larger, a percentage sell fee is calculated on that larger exit value. If the sale value is smaller, its fee difference will be smaller too. Keep the two sides separate until you have calculated their dollar amounts.
Separate fee cost from the trade outcome
The hypothetical trade’s gross price gain is $1,500 − $1,000 = $500 on either exchange because the quantity and prices are held constant. Fees change what remains: Exchange A leaves $497.50 net profit, while Exchange B leaves $495.00. The $2.50 gap between the net results is the fee difference for these inputs.
This comparison does not predict that either venue will produce those execution prices. It isolates fee arithmetic. Actual order fills may differ, and spread or slippage can change the result independently of the posted percentage fee. If you are comparing venues for a real order, use the prices and fee terms relevant to that order and label any other costs separately.
Formula for comparing the two schedules
Let Q be quantity, B the buy price, S the sell price, bA and sA the buy and sell rates at Exchange A, and bB and sB the rates at Exchange B. If percentage fees are charged in the quote currency, total modeled fees are:
Fees A = Q × B × bA + Q × S × sA
Fees B = Q × B × bB + Q × S × sB
Difference (B minus A) = Q × B × (bB − bA) + Q × S × (sB − sA)
A positive difference means B charges more total fees than A for these inputs; a negative difference means B charges less. Use decimal rates in the equations: 0.1% = 0.001. If the two venues use different fee currencies or fixed charges, calculate each actual charge in a common comparison currency before subtracting.
Check your own inputs
Enter the same buy price, sell price and quantity in a crypto profit calculator, then enter the first venue’s buy and sell rates to read its modeled fees and net result. Repeat with the second venue’s rates while keeping the trade values unchanged. The calculator uses the numbers you provide and does not fetch live prices or exchange fee schedules.
You can also use a crypto fee comparison calculator to compare the arithmetic one schedule at a time. Keep a note of which rate belongs to which order type and account tier so the two runs remain comparable.
Before relying on the result, check whether fees are charged in dollars, in the asset, or in another token; whether a minimum or fixed fee applies; and whether the rate shown is for your intended order type. If the actual fee is visible on a completed trade receipt, use that recorded amount to reconcile the calculation.
Scope and limits
This example assumes one purchase and one full sale, quote-currency percentage fees added to buy cost and deducted from sale proceeds, and no other charges. It excludes spread, slippage, network and withdrawal fees, taxes, partial fills, borrowing costs, rebates and changes to account fee tiers. It also assumes both exchanges can be compared using the same quantity and prices, which is a controlled calculation rather than a guarantee of execution.
The example percentages and prices are hypothetical; they are not current or historical fee claims about any exchange. Confirm the applicable terms directly in your account before trading. This page explains arithmetic and is not financial, legal or tax advice.