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Who we are

Numford builds useful digital products: fee calculators and guides for online sellers, and Android apps.

Report a fee that looks wrong

Every rate on this site links to the marketplace page we checked. If a number does not match what you were charged, tell us and we will recheck it. Please include:

• The platform, for example Etsy or eBay.
• Your country or shop country.
• The link from the Copy link button on the calculator, so we can see your exact inputs.
• What the marketplace charged you, if you can share it.

Start a fee error report

When to expect a reply

We usually reply within 2 business days. There is no contact form on this site, because it stores nothing about you. Your email goes straight to our inbox.