katlab tools/seller-fees

Seller Fee & Profit Calculator

See your real net profit after marketplace and payment fees — eBay, Etsy, Depop, Mercari, Poshmark and Vinted.

Runs in your browser. Nothing you type is uploaded or saved.
Your sale
$
$
$
$
$
Fees — editable
%
%
$
$
Net profit
$0.00
Buyer pays$0.00
Marketplace fee$0.00
Processing fee$0.00
Fixed / listing fees$0.00
Total fees$0.00
Item + shipping + other cost$0.00
Net profit$0.00
Profit margin
Return on cost
Break-even price
Rates are typical US figures as a starting point — every field is editable. Marketplaces change fees and rates vary by country, category and plan, so confirm the current rates for your account.

How to work out your profit on a sale

  1. Pick your marketplace to load its typical fees, or choose Custom.
  2. Enter your sale price, any shipping you charge the buyer, what the item cost you, your actual postage and any other costs.
  3. Adjust the fee fields if your category or plan differs. Your net profit, margin and return update instantly.

How marketplace fees usually work

Most selling platforms take a cut in up to three parts: a marketplace fee (a percentage of what the buyer pays), a payment processing fee (another percentage, sometimes bundled into the first), and a fixed fee per order or per listing. Many platforms charge their percentage on the total the buyer pays — including the shipping you charge — which is why the shipping toggle matters.

Which figures does each preset use?

Margin vs. return on cost

Profit margin is your net profit as a percentage of what the buyer pays — useful for comparing sales of different sizes. Return on cost is your net profit divided by what you spent (item, shipping and other costs) — useful when you buy to resell. The break-even price is the sale price at which profit would be zero, given your current costs and fees.

This tool is for estimates only and is not financial or tax advice. It does not account for sales tax, VAT, refunds, ad or promotion fees, or currency conversion unless you fold them into the cost fields.