Clearer estimates before you list
FeeFinderMate helps UK marketplace sellers review the costs behind a sale. The tools bring fee calculations, VAT assumptions and product costs into one readable breakdown.
How the calculators are maintained
Published fee schedules are reviewed against official marketplace pages. The tools identify the supported seller type and fulfilment method, show the date of the rate review, and provide adjustments for account-specific charges. The calculation code is tested at size, weight and price boundaries.
Fee rates are stored separately from page content. A source review is required when marketplace schedules change; the “reviewed” date is not an automatic promise that every future rate has been checked.
What an estimate includes
The Amazon tool models domestic UK FBA. The eBay tool models a single-item order for a UK-registered business seller. The TikTok tool models a completed UK sale without a refund. Extra costs should include your own realistic assumptions for packaging, advertising and other expenses.
What an estimate cannot know
Your account may have fee promotions, negotiated rates, returns, programme benefits or adjustments. Amazon’s recorded dimensions may differ from yours. These tools do not connect to a marketplace account and cannot read those details. Use overrides where appropriate and confirm important decisions with the official marketplace calculator or statement.
Privacy by design
Calculator inputs are processed in your browser. They are not submitted to FeeFinderMate as a form or sent as analytics events. Optional analytics and advertising are controlled through cookie preferences.
Found something that looks wrong?
Please report it with the marketplace, category, input values and expected result. Include an official fee reference if available, but remove account identifiers and customer details.