Online Seller Profit & ROI Calculator
Before you buy stock, check whether a product is worth it. Enter the buy price, sell price and fulfilment fee, and the sheet works out the referral fee, a returns reserve, net profit, ROI, margin, the break-even price and the most you can pay for your target ROI, then shows BUY or SKIP.
Features
- Room for 200 products
- All fee rates editable (check current fees in Seller Central)
- Works in Excel and Google Sheets, no macros
Estimates only; planning aid, not financial or tax advice. Example fee rates are illustrative as at Oct 2026 and can change — always check Amazon's current fee pages. No profit result is promised. Created with AI assistance. Price includes VAT where applicable (collected by Lemon Squeezy, our merchant of record). Refunds: email teamaijjgroup@gmail.com within 14 days of purchase for a full refund; if a file is faulty, we fix it, replace it or refund you; your legal rights are not affected. Amazon and FBA are trademarks of Amazon.com, Inc. or its affiliates; Excel is a trademark of Microsoft; Google Sheets is a trademark of Google LLC. Fernbrook Guides is not affiliated with, endorsed or sponsored by Amazon, Microsoft or Google.