If you're weighing up selling on Amazon in the UK, "FBA" is the first acronym you'll hit — and the one that decides most of your costs. This guide explains what Fulfilment by Amazon actually is, how the process works end to end, what it costs in 2026, and how to check a product will make money before you commit stock to it.
What is Amazon FBA?
Amazon gives sellers two ways to fulfil orders:
- FBM (Fulfilled by Merchant) — you store, pack and ship every order yourself.
- FBA (Fulfilment by Amazon) — you send stock to Amazon in bulk and it does the rest.
With FBA, your products are eligible for Prime, which means faster delivery and, for many shoppers, more trust and more sales. Amazon handles picking, packing, shipping, most customer service and the bulk of returns. You're effectively renting Amazon's warehouse network, delivery fleet and support team instead of building your own.
For retail and online arbitrage sellers — people who buy discounted stock from shops or other websites and resell it on Amazon — FBA is usually the default, because it lets you scale without a garage full of boxes and daily trips to the Post Office.
How Amazon FBA works, step by step
- Find a product that sells. You identify a product already selling well on Amazon.co.uk (arbitrage) or your own product (private label). Demand and competition matter as much as price.
- Check the margin before you buy. This is the step beginners skip and regret. Work out the sale price minus referral fee, FBA fee, VAT and cost of goods to see real net profit and ROI. (More on this below.)
- Create the listing / match to an existing one. For arbitrage you usually add your offer to an existing product page; for private label you build the listing.
- Prep and label the stock. Items are labelled and packed to Amazon's requirements. Amazon can do some prep for a fee.
- Send it to a fulfilment centre. You create a shipment in Seller Central and send stock to the UK fulfilment network.
- Amazon stores your inventory. It sits in a fulfilment centre, accruing storage fees per cubic foot per month.
- A customer orders. Amazon picks, packs and ships it — usually with Prime speed.
- Amazon handles service and returns. Most customer questions and returns are managed for you.
- You get paid. Amazon deducts its fees and pays out your balance on a regular cycle.
The appeal is obvious: once stock is in, the day-to-day logistics are Amazon's problem. The catch is that every one of those services has a fee attached — so the whole game is knowing your numbers.
The fees: what FBA actually costs in 2026
There are three fees that matter on almost every sale, plus storage:
| Fee | What it is | Rough 2026 figure (UK) |
|---|---|---|
| Referral fee | A percentage of the total sale price, taken by Amazon for selling on its marketplace | Commonly 15%, but lower in several categories; £0.25 minimum per item |
| FBA fulfilment fee | A flat per-unit charge for pick, pack and delivery, based on size/weight | Varies by size tier; includes a 1.5% fuel and logistics surcharge applied from 17 April 2026 |
| VAT | 20% UK VAT, including VAT charged on Amazon's fees | 20% (recoverable if VAT-registered) |
| Storage fee | Monthly charge per cubic foot while stock is stored | Roughly £0.78–£2.40/cu ft standard size, higher Oct–Dec |
Two things changed the maths in 2026. Amazon made one of its largest-ever fee reductions — cutting fees by an average of about £0.15 per unit across European stores and reducing UK parcel fulfilment fees by an average of around £0.26 — while adding the 1.5% fuel and logistics surcharge to fulfilment fees. The net effect varies by product, so don't assume; check each item. We break the numbers down in depth in Amazon FBA fees in the UK, explained and cover the specific 2026 shifts in Amazon UK FBA fee changes in 2026.
Referral fees vary a lot by category — see Amazon UK referral fees by category — and slow-moving stock racks up extra costs, which we cover in Amazon FBA storage fees UK.
Is Amazon FBA worth it in the UK?
FBA is worth it when the convenience and Prime sales lift outweigh the fees — which is most of the time for products that sell reasonably quickly. It's not worth it when your margins are so thin that the fulfilment fee eats the profit, or when stock sells so slowly that storage and aged-inventory surcharges bleed you dry. That's why velocity matters as much as margin; see Amazon sell-through rate.
A sensible way in for most UK beginners is retail arbitrage — buying clearance and discounted stock in-store or online and reselling via FBA — because you can start small, learn the fees on real products, and avoid large upfront bets. If the concept is new to you, start with what retail arbitrage is. Our beginner's guide to UK retail arbitrage walks through it, and is retail arbitrage still worth it? gives the honest version.
How to check a product is profitable before you send it in
The single habit that separates profitable FBA sellers from the rest is running the numbers before buying. For any product you need four things: the likely sale price, the referral fee for that category, the FBA fulfilment fee for that size/weight, and your cost of goods (plus VAT if you're registered). Subtract the fees, VAT and cost from the sale price and you have net profit; divide net profit by cost for ROI. Pair that with a benchmark — our good ROI and BSR guide sets sensible 2026 UK targets.
Doing that by hand across Amazon's fee tables and a calculator, in a shop aisle, is slow. The free Axivelo FBA calculator does the fee, VAT, profit and ROI maths in seconds, and the Axivelo app turns an in-store barcode scan into net profit, ROI, your maximum buy price and the demand signals (BSR, estimated monthly sales, price history) on one screen — so you can decide before you reach the till. You decide; it does the maths.
Check any product before you send it in
The free UK Amazon FBA calculator applies the 2026 fees and VAT to show net profit, ROI and margin. Axivelo does the same from a barcode scan in the aisle — free to start.
Open the free FBA calculatorFAQ
How does Amazon FBA work for beginners in the UK?
You send stock to Amazon's UK fulfilment centres; Amazon stores it, then picks, packs and ships each order with Prime delivery and handles most service and returns. You pay a referral fee (a percentage of the sale) and a per-unit FBA fulfilment fee, plus storage. Your profit is the sale price minus those fees, VAT and what the product cost you — so always check the margin before buying.
How much does Amazon FBA cost in the UK?
On a typical sale you'll pay a referral fee (commonly around 15%, lower in some categories, £0.25 minimum), an FBA fulfilment fee based on size and weight (which includes a 1.5% fuel and logistics surcharge in 2026), 20% VAT, and monthly storage fees while stock is stored. Exact figures depend on the product — use a calculator to check each one.
Is Amazon FBA worth it in 2026?
It's worth it for products that sell reasonably quickly at a healthy margin, because Prime eligibility and Amazon's logistics lift sales and save you the fulfilment work. It's not worth it for very thin-margin or slow-moving stock, where fulfilment and storage fees can wipe out the profit. Check profit and sell-through before you commit.
What's the difference between FBA and FBM?
With FBA (Fulfilment by Amazon) you send stock to Amazon and it stores, ships and services orders, and your products get Prime. With FBM (Fulfilled by Merchant) you handle storage, packing and shipping yourself. FBA scales better and unlocks Prime; FBM gives you more control and can be cheaper for large, slow or unusual items.
UK Amazon FBA sellers — we built Axivelo after one too many trips juggling Keepa, a calculator and a spreadsheet halfway down a B&M aisle. Now it shows profit, ROI, MAX PAY and demand on every in-store scan.