Amazon FBA Returns Accounting: Refunds & a Returns Reserve

Returns are part of selling on Amazon, not a sign that something has gone wrong. The problem is what they do to your books. A refund is not just "minus one sale". It claws back your revenue, it pulls stock back into your warehouse (or writes it off), it triggers an Amazon refund admin fee, and it changes the VAT you owe.

Get the bookkeeping wrong and your profit looks healthier than it is, your VAT return overstates what you owe, and your stock figure drifts away from reality.

This guide shows you how to record Amazon FBA refunds and returns properly, how to handle the VAT, and how to set up a returns reserve so a busy December does not flatter your numbers. It is written for UK sellers on the accruals (traditional) basis and on the cash basis, and every tax figure is dated and sourced.

What is the right way to do Amazon FBA returns accounting?

Record the refund as a reduction of sales (not an expense), reverse the related VAT only when you have actually refunded the customer, bring returned sellable stock back into inventory at cost, write off the rest, and book the Amazon refund admin fee as a cost. If returns are material, accrue a returns reserve at the period end so revenue and stock reflect goods you expect to come back.

How does an Amazon FBA refund actually work?

Before you can book it, you need to know what Amazon does behind the scenes. A single FBA refund usually has four moving parts:

1. The sale is reversed. Amazon refunds the customer the price they paid, including the VAT you charged.
2. The referral fee is partly returned to you. Amazon gives back most of the original selling fee.
3. A refund administration fee is charged. Amazon keeps a slice to cover processing the refund. Under Amazon's published policy this is a percentage of the original referral fee, subject to a cap per item. Treat this as an Amazon commercial charge, not a tax, and check the current figure in your Seller Central fee schedule, because Amazon sets and changes it.
4. The unit goes somewhere. It either comes back to a fulfilment centre as sellable stock, comes back as unsellable (damaged or used), or never arrives and is later reimbursed by Amazon.

So one refund touches sales, fees and stock at the same time. That is why a refund is never just a negative line on your sales report.

A practical tip: your Amazon settlement report is the source of truth. It nets refunds, fee reversals and the admin fee into your payout. If you only look at the payout figure, you lose the detail your accounts need.

How do you record a single FBA refund in your books?

The golden rule is that a refund reduces revenue, it is not a cost of sale. If you book refunds as an expense, your turnover is overstated, which matters for your VAT registration position, for the cash basis turnover test, and for anyone reading your accounts.

Here is the structure of the journal for one standard-rated refund of a UK sale. The figures are illustrative.

Illustrative example: refunding a £60 (inc VAT) standard-rated sale

You originally sold an item for £60 including VAT at the standard rate of 20% (the UK standard rate is 20% for 2025/26). That is £50 net plus £10 VAT. Your original referral fee was £9, and on the refund Amazon returns most of it but keeps a refund admin fee. Assume the item comes back as sellable stock that cost you £22.

The first two lines undo the sale and its VAT. The middle lines handle the fee movements. The last two lines move the returned unit back from cost of sales into stock, so your inventory and your gross margin both correct themselves.

If you sell through linked software, this is usually automated per settlement. The point of knowing the journal is so you can sanity-check what the software posts, especially the VAT line and the stock line, which are the two it most often gets wrong.

For most growing FBA businesses, the real win is getting clean monthly numbers without doing this by hand every day. That is exactly the kind of routine our bookkeeping service for ecommerce sellers is built to take off your plate.

How do you handle the VAT on an Amazon refund?

This is where sellers most often slip up, so it is worth being precise.

When you refund a customer for a standard-rated or reduced-rated UK sale, you reduce the output VAT you owe. But there is a timing rule that changed in 2019 and still catches people out.

Following Revenue and Customs Brief 6 (2019), you can only reduce your output VAT once you have actually refunded the customer. Issuing a credit note on its own is no longer enough. The decrease in price happens when the money goes back, and the credit note must follow within 14 days of that refund.

For FBA sellers this is rarely a problem, because Amazon refunds the customer at the point of the return, so the cash movement and the VAT adjustment line up naturally. The lesson is the principle: never reduce VAT for refunds you have promised but not paid.

Which VAT return boxes change?

On a standard UK VAT return (VAT Notice 700/12):

• Box 1 (VAT due on sales): you deduct the VAT on credit notes and refunds you have issued, which reduces your output tax.
• Box 6 (total value of sales excluding VAT): you take off the net value of refunds and credit notes you have issued, so Box 6 shows sales net of returns.

Boxes 4 and 7 are not affected by a customer refund, because those boxes deal with your purchases and input tax. They do come into play for Amazon's fees and for imports, which we cover below.

Zero-rated goods, the margin scheme and overseas sales

Not every refund moves VAT. If you sell zero-rated goods (for example most children's clothing or books, where the rate is 0% per VAT rates), there is no output VAT to reverse, so only the revenue and stock lines change.

If you sell second-hand goods under a margin scheme, the VAT you owe is based on your margin, so a refund adjusts the margin rather than reversing a flat 20%. And if the sale was to an overseas customer outside the UK VAT net, the refund usually carries no UK output VAT to begin with. Match the VAT treatment of the refund to the VAT treatment of the original sale, every time.

What is a returns reserve and when do you need one?

A returns reserve (also called a returns provision or, under the latest accounting rules, a refund liability) is an estimate, made at your period end, of the refunds you expect to give on sales you have already recorded but where the goods can still come back.

Picture a strong run-up to Christmas. You ship thousands of units in December, recognise all that revenue, then watch a wave of January returns roll in. Without a reserve, your December (or year-end) accounts look fantastic and your January looks grim. Neither is true. A reserve smooths this by recognising the expected returns in the period the sale was made.

You need a reserve when returns are material to your numbers. A seller with a 2% return rate on steady sales can often ignore it. A fashion or electronics seller running 20% to 30% returns around peak season usually cannot.

How the accounting standards treat it

For UK companies reporting under FRS 102, the revised FRS 102 Section 23 brings in a model aligned with IFRS 15 for sales with a right of return. These amendments apply to accounting periods beginning on or after 1 January 2026. Under the new approach you recognise:

• a refund liability for the consideration you expect to repay, and
• a refund asset for the stock you expect to get back, measured at its former carrying amount.

In plainer terms, you hold back the revenue you expect to refund and you keep the cost of the goods you expect to recover on your balance sheet rather than in cost of sales. The older guidance achieved a similar end through a returns provision, but the new framework is more explicit about splitting the liability from the asset.

The principle is the same whichever framework applies to you: do not bank revenue you expect to hand back, and do not expense stock you expect to get back.

Worked example: a returns reserve at the year end

Illustrative example: estimating a year-end returns reserve

Meadowgate Goods Ltd, a hypothetical FBA seller, finishes its year on 31 December. In the final two weeks it makes £40,000 of standard-rated UK sales (net of VAT) that customers can still return. Its historic return rate on this product line is 15%, and the goods that come back are normally resold, so the stock is recovered. The cost of those goods is 45% of the net selling price.

Expected refunds (revenue to defer):

• £40,000 x 15% = £6,000 of net sales expected to be refunded.

Stock expected back (refund asset / reduce cost of sales):

• Cost of the £6,000 of sales = £6,000 x 45% = £2,700.

Year-end adjustment:

The net effect on profit is a £3,300 reduction (£6,000 less £2,700), which is the gross margin Meadowgate is choosing not to recognise on sales it expects to reverse. When the January returns actually happen, they are matched against the reserve rather than hitting January's profit and loss.

Two practical points. First, base the percentage on your own data, not a guess. Your Amazon returns reports give you a real return rate by product. Second, the VAT on those expected refunds is not adjusted in the reserve. You only reduce output VAT when you actually refund a customer, as set out above. The reserve is an accounts estimate, not a VAT filing.

Does the cash basis change any of this?

Yes, quite a lot, and it matters because the cash basis is now the default for many sole traders.

From the 2024/25 tax year, the cash basis is the standard way for sole traders and eligible partnerships to work out taxable profits, unless you elect for traditional accruals accounting. On the cash basis you record income when the money comes in and expenses when you pay them.

The knock-on effects for returns:

• A refund reduces your recorded income when the cash actually goes back to the customer, which for FBA is when Amazon processes it. There is no separate timing judgement.
• You do not book a returns reserve. A reserve is an accruals concept. On the cash basis, future expected refunds simply are not in your numbers until they happen.
• Your stock is not carried as a year-end asset in the same way, because the cash basis does not require the formal opening and closing stock adjustments that accruals accounting does.

So if you are a sole trader on the cash basis, your job is mainly to make sure refunds reduce income (not get buried as a cost) and that you are reading the Amazon settlement net of fees correctly. If you trade through a limited company, you are on the accruals basis and the reserve discussion above is live for you. Not sure which camp you are in? Our accountants for Amazon FBA sellers help sellers pick the right basis and set the books up to match.

What about returned stock, reimbursements and write-offs?

The cash side of a refund is only half the story. The unit has to be accounted for too.

Sellable returns. If the item comes back in resaleable condition, move it from cost of sales back into inventory at its cost, exactly as in the single-refund journal above. Your stock figure goes back up and your gross profit corrects.

Unsellable returns. If the item comes back damaged or used and cannot be resold, you do not restore it to stock. The cost stays in cost of sales (or moves to a stock write-off line), because the value is genuinely gone. Be honest here. Capitalising stock you cannot sell overstates both assets and profit.

Amazon reimbursements. Where a unit is lost, damaged in the fulfilment centre, or not returned by the customer within Amazon's window, Amazon may reimburse you. Treat a reimbursement as other income, not as a sale, and keep the evidence from your reimbursement reports. It is taxable income, but it is not turnover for VAT or for your sales analysis.

Imports and VAT. Many FBA sellers import stock. If you bring goods into Great Britain and use postponed VAT accounting, you account for import VAT in Box 1 and reclaim it in Box 4 of the same return, using your monthly postponed import VAT statement. That is separate from returns, but it is the other half of getting an importer-seller's VAT return right, so it is worth keeping the two reports filed together.

Common Amazon FBA returns mistakes we see

In practice, the same handful of errors come up again and again:

• Booking refunds as an expense. This inflates turnover and can push sellers over the VAT registration threshold of £90,000 (current threshold from 1 April 2024, per VAT registration thresholds) on paper when their real net sales are lower.
• Reversing VAT on refunds before the customer is actually paid. Against RCB 6 (2019).
• Never bringing returned stock back into inventory, so the stock figure quietly drifts wrong all year.
• Restoring unsellable stock to inventory, which overstates assets and profit.
• Ignoring a returns reserve through a heavy peak, so the year-end accounts overstate profit.
• Treating reimbursements as sales, which distorts both turnover and margin.

None of these is hard to fix once the structure is right. The trick is having a consistent monthly process so the errors never build up.

Want your Amazon books reconciled properly every month, with refunds, fees and a sensible returns reserve handled for you? Book a free call with a Zmartly accountant through our Amazon FBA accounting service, and we will get your numbers telling the truth.

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