Founder, Aftermarket Arbitrage
Free tools for UK Amazon sellers, running the same 2026 fee tables my sourcing engine prices every deal with — audited against Amazon’s published rate cards. No signup, no email gate, just the numbers.
Amazon FBA Profit Calculator
Full deal maths: referral fee by category, FBA fulfilment with the fuel surcharge, the 2% Digital Services Fee most calculators forget, and VAT both registered and not.
FBA Size Tier & Fee Checker
Enter dimensions and weight, get your 2026 tier and fee – including the dimensional weight rule (L × W × H ÷ 5,000) that quietly overcharges boxy products.
Seller VAT Calculator
Your runway to the £90,000 registration threshold at your current run rate, and exactly what registering does to per-deal profit – the 5/6 rule.
Want the thinking behind the numbers? Start with my Online Arbitrage UK guide or the Retail Arbitrage UK guide. And if you’d rather have deals found, verified and priced for you every day – that’s what the membership is.
About the author
Jack Bayliss is the founder of Aftermarket Arbitrage, where a team and a purpose-built sourcing engine find and verify Amazon UK deals for members every day. Meet the community on the community page or book a free call.
