Seller Fee & Profit Margin Calculator
Subtract marketplace fees, shipping and cost from your price to see real profit and margin, or work back to the price you need.
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Seller Fee & Profit Margin Calculator: complete guide
Walk through the steps and examples, or jump straight to the topic you need.
At a glance
- Formula
- Profit = (money paid by the customer − fees) − (cost + shipping + packaging + advertising)
- Fees
- You can enter a percentage and a fixed amount together. No fee rate is filled in by default.
- Fee basis
- Choose whether the fee is charged on the item price only or on the item price plus the customer's shipping.
- Shipping
- Shipping paid by the customer is counted once in revenue, and shipping you paid is counted once in costs.
- Margin
- Profit ÷ money paid by the customer × 100
- Markup
- Profit ÷ cost that went in × 100
- Target backward calculation
- The selling price found backward is run forward again and verified before it is shown.
- Not included
- VAT, income tax, card fees, return costs, warehouse and labor costs are not in the calculation.
How to use Seller Fee & Profit Margin Calculator
Enter the selling price and cost
Enter the price the customer sees and what it cost you to get the product. If there is a discount, enter it as an amount or a percentage and the tool also shows the actual selling price.
Choose the fee rate and what it is charged on
Enter the fee rate your marketplace publishes. If there is a per-order flat fee, put it in the fixed fee field. To match your real settlement, choose whether the fee is charged on the item price only or on the item price plus the customer's shipping.
Expand and fill in shipping, packaging and advertising
These are collapsed at first so they do not get in the way of the basic calculation. For free shipping, leave the customer's shipping at 0 and enter only the courier fee you paid.
Check the profit and the cost breakdown
A bar and a table show how fees and costs come out of the money the customer paid. Enter a target amount to see the selling price you need, and turn on the A/B comparison to place two prices side by side.
What it’s good for
What you keep depends on what the fee is charged on
Even at the same fee rate, the result differs depending on whether the fee is charged on the item price only or on the item price plus the shipping the customer paid. This calculator lets you pick either basis so you can match it to your actual settlement statement. No marketplace's current fee is filled in by default, so enter the figures your marketplace publishes.
Margin and markup use different denominators
Margin uses the money the customer paid as its denominator, while markup uses the cost that went in. So the same profit gives two different values. For example, if you sell for KRW 10,000 and keep KRW 5,000, the margin is 50% and the markup is 100%. Enter a target amount and the tool works backward to the selling price you need, then runs that price forward again to check it, and only shows it if it matches.
Worked examples
The difference between fee bases
Selling price KRW 10,000 · customer shipping KRW 3,000
Fee 10%On the item price only → fee KRW 1,000
On item price plus shipping → fee KRW 1,300
Difference in profit KRW 300Margin and markup
Selling price KRW 10,000 · cost KRW 5,000
No feesProfit KRW 5,000
Margin 50%
Markup 100%The denominators of the two ratios
Swipe the table sideways to see the rest.
| Value | Denominator | How to read it |
|---|---|---|
| Margin | All the money the customer paid | How many won out of every 100 of revenue you keep |
| Markup | All the cost that went in | What percentage you add on top of cost |
| Break-even selling price | — | The selling price at which profit is exactly 0 |
When the result isn’t what you expected
My settlement amount differs from the calculation
First check what the fee is charged on. Many marketplaces take the fee on the item price plus the customer's shipping. Then check whether there are separate fixed fees and payment processing fees, and try entering them in the fixed fee field.
I entered a target amount but no value appears
If the fee rate or the discount rate is 100%, raising the price cannot reach the target, so the reason is shown. If the price found backward does not match the target when recalculated, the value is not shown.
The margin is negative
Your costs are higher than the amount you are settled, so you are losing money. You need to raise the selling price or cut costs, and the break-even selling price tells you the price from which you start to keep something.
Can I file this amount as it is?
No. It does not include VAT, income tax, card fees, return or exchange costs, or warehouse and labor costs. It is meant to give a rough idea of what you keep from a single sale.
Key terms
- Settlement amount
- The money the customer paid minus the marketplace's fee.
- Fixed fee
- A flat fee charged per order regardless of the amount.
- Break-even
- The point where profit is exactly 0.
Seller Fee & Profit Margin Calculator FAQ
Is shipping deducted twice?
No. Shipping paid by the customer is added to revenue only once, and shipping you paid is subtracted from costs only once. In the cost breakdown of the result, you can see each item counted exactly once.
It says there is no solution for my target amount
If the fee rate is 100%, raising the price does not increase what you keep, so the target can never be reached. The same is true when the discount rate is 100%. In these cases the tool does not force a number and shows the reason instead.
Can I use these figures for tax filing?
No. It calculates only the cost, fees, shipping, packaging and advertising you enter. It does not include VAT, income tax, card processing fees, return or exchange costs, or warehouse and labor costs.
Are marketplace fee rates built in?
No. Fees change often with policy and category, so no arbitrary number is filled in as if it were a current fee. Please enter the figures your marketplace publishes.
Can I calculate several products at once?
For now, one at a time. For two cases with different prices or costs, you can place them side by side with the A/B comparison.
Are my inputs saved?
No. The calculation happens only inside this browser, and refreshing the page returns it to the starting state.