Free calculator · Amazon, Etsy, eBay · no signup
Not the headline fee — the all-in number. Amazon has eight fee categories and most sellers track two. Put in your own figures and see every line, including the ones that never make it onto the spreadsheet.
Your inputs stay in your browser. Nothing is sent unless you save the result.
Amazon
Referral and fulfilment get tracked. Storage, inbound placement, inbound defects, aged inventory, low inventory and returns processing often don’t — reporting puts them at $0.30 to $4.00 or more per unit. Since April 17, 2026 a 3.5% fuel and logistics surcharge sits on top of every FBA fulfilment fee (Amazon’s notice).
Etsy
So is payment processing, which also applies to the sales tax Etsy collects. A multi-quantity listing renews for $0.20 every time it sells. And from June 22, 2026 Regulatory Operating Fees changed in seven markets, including France at 1.14% and Hungary at 1.97% (Etsy’s fee policy).
eBay
Sellers report that after eBay changed how it attributes sales to Promoted Listings, the share of their sales counted as ad-driven went from roughly 30–40% to 80–90%, with no matching lift in return. The calculator shows what that shift costs at your ad rate (eBay’s fee page).
Changes that moved sellers’ costs or obligations this year, in our words. Each links to the marketplace’s own page.
In-house prep service ended; inbound defect fees went up. Source
Seller Policy updated. Source
New base rates for referral and FBA fees, with fulfilment now priced by sale-price band. Source
Payments Policy updated. Source
3.5% fuel and logistics surcharge added to FBA fulfilment fees. Source
Regulatory Operating Fees changed across seven markets. Source
Rules on animal products updated. Source
Change alerts · $39 for 6 months
A dated alert for each fee or policy change that affects you, with the monthly cost at your volume and what to do by when.
Policy audit · $79 once
A written review of up to 25 live listings against current policy, with the fix for each problem found.