Work out your Amazon FBA revenue, profit, ROI and margin per unit, plus projected monthly revenue, before you commit to stock. No Amazon account or ASIN lookup needed.
Don't know your FBA fee? Find it under your product's pricing details in Seller Central, or use Amazon's official fee schedule.
Enter your sale price and product cost, pick a category (or type in your own referral fee percentage), and choose FBA or FBM. The calculator works out Amazon's referral fee, the FBA fulfilment fee (if applicable), and UK VAT and Digital Services Tax where relevant, then shows your profit per unit, ROI, margin and break-even sale price. Add expected units sold per month to see projected monthly revenue and profit.
Two fees make up most of what Amazon takes from a sale: the referral fee, a percentage of the sale price that varies by category, and (if you use Fulfilment by Amazon) the FBA fulfilment fee, a flat per-unit charge for picking, packing and shipping based on the product's size and weight. UK sellers also pay VAT on top of both fees, plus a small Digital Services Tax Amazon applies to its own fees.
| Fee | What it covers |
|---|---|
| Referral fee | A percentage of the sale price, set by category (typically 8-20% in the UK) |
| FBA fulfilment fee | Flat per-unit fee for Amazon picking, packing and shipping the order (FBA only) |
| VAT | 20% UK VAT, applied to the sale price, cost and fees for VAT-registered sellers |
| Digital Services Tax | A small tax Amazon applies to its own referral and fulfilment fees |
These terms get used interchangeably but answer different questions. Revenue is simply units sold × sale price, and it says nothing about whether the product is worth selling. Profit is what's left after product cost and Amazon's fees. ROI (return on investment) is profit as a percentage of what you spent on stock, the number that tells you how hard your cash is working. Margin is profit as a percentage of the sale price, useful for comparing pricing strategy across products.
It uses the same fee formula (referral fee, FBA fulfilment fee, UK VAT and Digital Services Tax) as SourceSheets' own product-level calculator. The referral fee percentages are standard Amazon UK category rates. Some categories have price-banded exceptions, so check Amazon's official fee schedule if you need an exact figure for a specific product.
Most FBA sellers aim for at least 20-30% ROI and a margin above 15-20% once fees are accounted for, though thresholds vary by category and how much cash you're willing to tie up in stock.
Yes. Toggle "VAT" if you're VAT registered, and the calculator strips VAT from your sale price, cost and fees before working out profit, matching how Amazon actually settles VAT-registered UK sellers.
Amazon shows both in Seller Central under your product's pricing details, or you can look up the category rate on Amazon's official Selling on Amazon fee schedule.
This calculator is a manual, per-product snapshot. If you're evaluating products regularly, SourceSheets' ASIN Monitor pulls a product's real referral fee, FBA fee and price history straight from Amazon data and runs the same profit math automatically, with no manual fee lookups required.
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