Amazon FBA Profit Calculator UK

Amazon FBA (Fulfillment by Amazon) means you send your products to Amazon's warehouses. Amazon stores, picks, packs, and ships orders for you. You pay referral fees (8–15% of sale price) plus FBA fulfillment fees (typically £2.50–£5.50 per unit) and monthly storage fees.

Amazon UK referral fees vary by category: Books (15%), Electronics (8%), Clothing (17%), Home & Kitchen (15%), Toys (15%), Beauty (8–15%), Grocery (8%). The minimum referral fee is typically £0.25. Check Amazon Seller Central for your specific category rate.

All Amazon business expenses are deductible: referral fees, FBA fulfillment fees, storage fees, advertising (PPC/Sponsored Products), sourcing/product costs, shipping to Amazon, photography/listing creation, software tools (Helium 10, Jungle Scout), and trademark/brand registration.

You must register for VAT when turnover exceeds £90,000/year, or immediately if selling goods through Amazon Pan-European FBA (which stores goods in EU countries). Many FBA sellers voluntarily register early to reclaim input VAT on purchases.

Target at least 30% gross margin after Amazon fees and COGS. Experienced FBA sellers typically aim for 25–40% gross margins. After advertising, storage, and other costs, net margins of 15–25% are considered healthy.

Most FBA sellers operating at scale run through a limited company to benefit from lower corporation tax rates (25% on profits over £50,000 vs. up to 47% for individuals) and limited liability protection. Consult an accountant once annual profits exceed £25,000.

Amazon's VAT Services on Seller Central (powered by Avalara) automates VAT registration and filing across multiple EU countries. Useful for Pan-European FBA but add monthly fees (~£19+/month per country). Evaluate carefully against your sales volume in each country.

ROI (Return on Investment) = (Profit per unit / Product cost) × 100. FBA sellers typically target 50%+ ROI. Higher ROI means faster capital recycling — critical for inventory-based businesses where cash is tied up in stock.

Break-even price = Product cost + All Amazon fees. Below this price, every sale is a loss. Use our calculator to find your minimum viable selling price, then check if market prices allow sufficient margin.

Amazon IP Accelerator connects UK sellers with law firms to fast-track trademark registration (typically 4–6 months vs. 12+ months standard). Brand Registry requires trademark registration and provides significant anti-counterfeit and listing protection.

Amazon FBA income is trading income. Register for Self Assessment if FBA profits exceed £1,000. Declare all income on your Self Assessment. Keep Amazon seller reports, purchase invoices, and expense records for HMRC audit defence.

The cost of inventory is deductible in the year it's sold (cost of goods sold), not when purchased. Unsold inventory at year-end is an asset, not an expense. This distinction matters for accurate tax calculations and year-end stock valuations.