Disclaimer

1. Reference information only

The calculators, fee tables and guides on sellmath (sellmath.com) are general reference information. They do not replace advice from an accountant, tax adviser, customs broker or lawyer, and they are not tailored to any individual seller or business.

2. Limits of accuracy

• Marketplace fees are reference values compiled from each platform's public fee pages as of the date shown. Promotions, account status, product attributes, category assignments and policy changes can make the fee on a specific order differ.
• Some rates — for example Shopify Payments card rates — are shown as published for the United States and vary by country, card type and sales channel.
• Values you enter (costs, weights, tax rates, exchange rates) are your responsibility; the result is only as accurate as the inputs.
• Fees that depend on inventory behaviour rather than a single unit (low-inventory fees, aged-inventory surcharges, returns processing, chargebacks, refunds) are not modelled unless the tool says so.

3. Limitation of liability

To the extent permitted by law, the operator accepts no liability for decisions made in reliance on the site — pricing, channel selection, inventory purchases, advertising budgets, tax or customs filings — or for their consequences, including losses, penalties or account actions.

4. Trademarks and independence

Amazon, FBA, Seller Central, Etsy, eBay, Shopify and other names on this site are trademarks of their respective owners, used solely to describe those companies' published fees and policies. sellmath is an independent site and is not affiliated with, endorsed by, certified by or sponsored by any of them. Statements about how a platform's fees work are summaries of public documentation, not statements on behalf of the platform.

5. External links and affiliate links

Links to external sites are provided for convenience; the operator is not responsible for their content or policies. Where a page contains affiliate links, it is labelled as such; affiliate relationships do not affect the data or calculations.

6. Check before you act

Before an important decision, confirm the figures in your own seller account, the platform's official fee pages, or with a professional. If you find an error, please tell us — reports are checked and corrections are published with an updated date.