About This Launch
What Profit is a free suite of UK marketplace fee calculators for eBay, Vinted, Amazon FBA/FBM, Depop, Etsy, Shopify, TikTok Shop, Facebook Marketplace and Whatnot. Enter price, costs, postage and ads to see take-home after fees, with VAT toggles and an eBay buyer-protection calculator. No account required. Built for UK private and business sellers. Contact: hello@whatprofit.co.uk
Why I Built This
Built after UK sellers kept losing money to opaque fee stacks, especially eBay buyer protection vs seller FVF, and Amazon FBA quotes that don't match take-home. One free tool per platform so the maths never gets mixed.
Launch Details
CategoryProductivity
StageLive
ListedSeptember 26, 2026