FBA Calculator UK 2026
Instantly estimate your Amazon UK referral fee, FBA fulfilment fee, net profit, margin and ROI. Built for sellers who want a clear, honest picture before they list.
Profit Calculator
Enter your product details to estimate FBA fees and profit
Freight or courier cost to get one unit into an Amazon UK fulfilment centre.
Amazon referral fee as a percentage of your selling price.
Estimated FBA fulfilment fee (pick, pack & delivery) based on parcel size and weight.
Optional. Leave as 0 to exclude storage costs from the calculation.
Used to estimate your total monthly net profit.
Your FBA Profit Breakdown
Fees, net profit, margin, ROI and monthly totals
Enter your product details above and click Calculate FBA Profit to reveal your Amazon fee breakdown and profit estimate.
Amazon UK FBA Size Tiers
Approximate FBA fulfilment fees by size tier for Amazon.co.uk. Actual fees vary by exact weight and dimensions, so always confirm against Seller Central before pricing.
| Size Tier | Max Weight | Approx. Fee | Typical Products |
|---|---|---|---|
| Small Standard | 460g | £2.50 | Phone cases, small accessories, jewellery |
| Standard | 900g | £3.20 | Books, kitchen gadgets, cosmetics sets |
| Large Standard | 5.9kg | £4.60 | Toys, small appliances, clothing multipacks |
| Small Oversize | 12kg | £7.90 | Desk lamps, small furniture, monitors |
| Standard Oversize | 22kg | £14.50 | Office chairs, large toys, patio items |
| Large Oversize | 30kg | £25.00 | Large furniture, exercise equipment |
FBA Calculator UK FAQ
Everything you need to know about Amazon FBA fees, profit margins, and calculating ROI for products sold on Amazon.co.uk.
To calculate Amazon FBA fees in the UK, add together the referral fee (a percentage of your selling price that varies by category) and the FBA fulfilment fee (based on your product’s size tier and weight). Subtract these fees, plus your product cost and any shipping-to-Amazon costs, from your selling price to find your net profit.
Most experienced Amazon UK sellers aim for a net profit margin of at least 15-20% after all fees and costs. Margins below 10% leave little room for advertising spend, returns, or price fluctuations, while margins above 25% are considered strong for a competitive category.
The Amazon UK referral fee is a percentage of the total selling price charged on every sale, and it varies by product category. Most categories fall between 7% and 15%, though some categories such as jewellery or Amazon device accessories can be significantly higher.
The FBA fulfilment fee is based on your product’s size tier (small standard, standard, large, or oversize) and its weight. Amazon picks, packs, and ships the order on your behalf, and the fee increases as the parcel gets bigger and heavier.
Yes, you can enter an optional monthly storage fee per unit to see how it affects your overall profit and margin. Storage fees vary seasonally and by size tier, with higher rates typically charged during the October to December peak period.
ROI, or return on investment, measures your net profit as a percentage of what you spent to acquire the product. It is calculated as net profit divided by product cost, multiplied by 100, and helps sellers compare how efficiently different products use their capital.