How we calculate

Each platform has one rate file per country. It holds the rates, the fixed fees, the category exceptions, the address of the page the numbers came from and the date we last checked them. The calculators and the comparison tool all read those files through one shared fee engine, so a rate is corrected in exactly one place.

Where rates come from

From the platform's own fee page wherever possible. Some platforms block automated access or show different prices by country; when a figure could only be read through a search extract or a third-party summary, the calculator says so under "Still to confirm at the source" and the point stays open until someone has checked it on the platform's page.

How often rates are checked

At least once a month. The date is shown at the top of every calculator, and changes are listed on the fee changes page.

Rounding

Each fee line is rounded to the cent, the way it appears on a marketplace statement, and the lines are then added up.

What the result includes

The platform's standard selling and payment fees for the options you pick. Store subscriptions, seller-level discounts, taxes on fees and promotions are only included where the calculator lists them.

Where the calculation happens

In your browser. The page downloads the tool once and does the work on your device, so results appear as you type and your inputs are not sent to us.

What a tool page shows

The date the page was last updated.
How the result is produced.
On the tools rebuilt on our current template: the formula or rule, a worked example you can check by hand, and the sources the numbers come from, linked. Older tools are being brought up to that standard.

Sources we rely on

Limits

FeeCalc is an estimating tool, not accounting, tax or financial advice. Platforms change their fees and apply account-specific discounts and surcharges; the statement in your seller account is the final word.