Amazon FBA Fees UK Explained (2026): What You Actually Pay

The single biggest reason retail-arbitrage sellers lose money is misjudging Amazon's fees. A product can look like a great flip until you subtract everything Amazon takes, and then the margin is gone. Here's a plain-English breakdown of the fees you actually pay as a UK FBA seller, and how to work out your true profit before you buy.

The two fees that always apply

• Referral fee - Amazon's commission on the sale, taken as a percentage of the total price (usually around 15 percent, though it varies by category). This is charged on every sale, FBA or not.
• Fulfilment fee (FBA) - What Amazon charges to pick, pack and ship the item to the customer. It's based on the packaged size and weight, so a small light item costs far less to fulfil than a large or heavy one.

Between them, these two often add up to 25 to 40 percent of the sale price, which is why guessing them is so dangerous. The fulfilment fee in particular trips people up, because it depends on the exact size tier and many tools only estimate it.

The fees that sometimes apply

• Monthly storage fee - A small charge per cubic metre for holding your stock in Amazon's warehouses. It's cheap for fast-moving stock and rises sharply in the October to December peak, so slow sellers cost you more.
• Digital Services Fee - A percentage added on top of your selling and fulfilment fees. Small per item, but it's real and belongs in your calculation.
• Long-term storage fee - An extra charge on stock that sits for a long time. Another reason to avoid overbuying items that don't sell.
• Returns and removals - Customer returns can carry a processing cost, and removing unsold stock isn't free. Factor a little slack for this on higher-return categories like clothing.

Don't forget VAT

If you're VAT-registered, VAT changes the picture in two directions: you owe output VAT on your sales, but you can reclaim the VAT on Amazon's fees and, if you bought the goods VAT-inclusive, on your cost too. If you're not VAT-registered, you can't reclaim the VAT Amazon adds to its fees, so your effective fees are higher. Either way, VAT has to be in your profit calculation, not an afterthought.

How to work out your real profit

The honest sum for any product is:

Sale price, minus referral fee, minus fulfilment fee, minus other Amazon fees, minus your cost and prep, minus VAT (if registered), equals profit.

Doing that by hand for every item in a shop is slow and error-prone, which is exactly why sellers use a deal analyser. retailscout works all of this out for you: scan a barcode and it pulls Amazon's live fees for that product (so the fulfilment figure matches Amazon's own calculator rather than a size-tier guess), applies your VAT and prep settings, and shows your profit and ROI on the price you'd pay.

A worked example

Say an item sells for £20 on Amazon. A 15 percent referral fee is £3, and the FBA fulfilment fee is £3, plus a small digital services fee. That's roughly £6.50 to Amazon before you've counted your cost. If you paid £6 for it, your profit is around £7.50 and your ROI is strong. If you paid £11 for the same item, you're barely breaking even. Same product, very different deal, and the only way to know is to run the fees.

The takeaway

Amazon's fees aren't complicated once you see them laid out, but they're big enough that guessing them turns winners into losers. Always deduct the referral fee, the fulfilment fee, the smaller fees and VAT before you decide, and use the live fee for the product rather than an estimate wherever you can. Get that right and every buy is a deliberate decision, not a gamble.