How it's calculated
Every unit sold through Fulfilment by Amazon carries two main fees: a referral fee, charged as a percentage of the total sales price, and a fulfilment fee that depends on the product's size tier and shipping weight. The calculator takes VAT out of the selling price, deducts both fees, storage and your own costs, and shows the profit per unit, the margin and the price at which you would break even.
Fees come from Amazon's published EU rate card effective 1 July 2026, which covers Amazon.co.uk and the EU stores.Amazon The German fees are those for sellers in the Central Europe Programme. From 17 April 2026 Amazon adds a 1.5% fuel and logistics surcharge to fulfilment fees, which the calculator adds on top.
The formula
- Revenue = price ÷ (1 + VAT rate) for a VAT-registered seller
- Referral fee = category rate × total sales price (tiered where the category has tiers), at least the minimum per item
- Fulfilment fee = rate-card fee for the size tier × 1.015
- Profit = revenue − referral fee − fulfilment fee − storage − product cost − shipping to Amazon − other costs
- Margin = profit ÷ revenue; return = profit ÷ (product cost + shipping to Amazon)
Worked example
A kitchen product selling for £24.99 on Amazon.co.uk, in the small parcel tier up to 400 g, costing £6 to make and £1 to ship to Amazon, pays £3.75 in referral fee and £3.05 for fulfilment. After VAT and £0.10 of storage it makes £6.93 per unit, a margin of 33.3%. Below £14.85 it would lose money.
| Line | Per unit |
|---|---|
| Price paid by the customer | £24.99 |
| VAT (20%) | -£4.16 |
| Referral fee (Kitchen) | -£3.75 |
| FBA fulfilment (Small parcel, up to 400 g, + 1.5% surcharge) | -£3.05 |
| Storage | -£0.10 |
| Product cost | -£6.00 |
| Shipping to Amazon | -£1.00 |
| Profit | £6.93 |
The same product on Amazon.de at €27.99 earns €9.05 per unit.
Assumptions and limitations
- Non-peak fulfilment fees (15 January–14 October); peak fees are higher.
- Standard-size tiers only. Oversize, low-price FBA, dangerous goods and clothing-specific rates are not included.
- Furniture, jewellery and clothing have tiered referral fees not listed here; use "Everything else" as an approximation or check the rate card.
- Advertising, returns and refunds belong in "other costs"; they often decide whether a product is profitable.