Returns and refunds in your VAT return: what sellers get wrong

Almost no marketplace pays you what you invoiced. Amazon, Etsy and eBay settle net: sales, less fees, less refunds, less adjustments, in one transfer. If that transfer lands in Xero or QuickBooks as a single sales receipt, the refunds inside it have been quietly netted off your turnover and the output VAT on those original sales is still in the return.

Shopify gets there by a different route with the same ending. Orders sync one way, refunds are processed in the Shopify admin, and unless the refund posts as a credit against the original invoice, the books carry that sale at full value forever.

The patterns we find most often when we take over a set of e-commerce books:

• Refunds netted inside a payout and never posted as credits against sales
• Partial refunds and goodwill gestures coded to an expense account instead of reducing sales
• Refunded delivery charges left sitting in turnover
• Chargebacks coded to bank charges

None of it looks dramatic in a single month. The refund rate on a decent seller is steady, so the same error repeats every settlement, every quarter, and the overpayment grows with the business.

When you refund a customer you are reducing the price of the supply. HMRC set out in Revenue and Customs Brief 6 (2019) what that means in practice, and it has applied since 1 September 2019: the adjustment goes in the return for the period in which the refund happens. You do not go back and amend the original return.

So a sale made in one quarter and refunded in the next reduces your output tax in the next quarter’s return. People try to be tidy about this and restate the earlier period. Don’t. The adjustment follows the money, and the money has to actually reach the customer before you reduce the VAT. That was the whole point of the change, because some businesses were taking the VAT reduction without ever refunding anyone.

For a business customer, issue a credit note and they reduce their input tax by the same amount. For consumer sales on a marketplace, the platform’s refund record is your evidence, and it should flow into the books as a credit against the original sale rather than a fresh negative sale picking up whatever VAT code is set as the default.

Everything a marketplace takes off your payout gets lumped together in most people’s heads, and the VAT treatment of each one is different.

Selling and advertising fees charged by an overseas marketplace entity normally fall under the reverse charge, so they belong in your output and input boxes and in your purchases total. They are not refunds and they do not reduce your sales.

A chargeback is the card issuer taking money back. If the customer keeps the goods, you have lost cash on a sale that still happened, and your output tax does not change. If the chargeback is in substance a refund of the sale, treat it like any other refund.

Promotional discounts and coupon codes reduce the consideration at the point of sale, so the VAT follows the discounted price. That matters because platforms report gross sales with discounts on a separate line, and if the discount line is posted as a cost rather than against sales, your turnover and your box 6 figure are both overstated.

If you keep a restocking or handling charge out of a refund, the bit you keep is payment for something and usually carries VAT in its own right. Small item, easy to miss, and it shows up in a review.

A refund inherits the VAT treatment of the sale it reverses. Refund a zero rated export and your output tax does not move, though your total sales figure does. Refund a UK sale and output tax comes down. Bulk refunds posted against a default standard rated code quietly mix the two, which is how sellers end up reclaiming VAT they never charged or paying VAT on sales that were never UK sales in the first place.

If you charged UK VAT in error to a customer outside the UK, the fix runs in order: credit note, money back to the customer, then the adjustment in your own return. Not the other way round.

The flat rate scheme changes the arithmetic again, because you pay a percentage of gross takings, and refunds reduce those takings in the period you make them. One of our clients sells watches with roughly 70 per cent of her sales overseas and was on flat rate, paying VAT across the whole lot. Moving her onto the standard scheme meant VAT on the UK 30 per cent only, with her input VAT reclaimed properly, and refunds reversing the exact VAT the original sale carried.

Start by working out the net effect rather than the gross noise. Add up the VAT you under-declared, take off the VAT you over-declared, and see where you land. Most refund errors run in your favour once corrected, because you have been paying VAT on sales that no longer exist.

If the net error is below HMRC’s size tests, you correct it on your next return, with output tax adjustments in box 1 and input tax in box 4. There are two tests, one an absolute amount and one measured against your total sales, and above them you report the error to HMRC separately instead. Anything deliberate always goes separately. The current rules are set out in HMRC’s guidance on correcting errors in your VAT return, and corrections reach back four years. Keep a note of when you found the error, how it happened and the VAT involved, in your VAT account.

In practice the clean-up is rarely one journal. If refunds have been mapped wrongly, every settlement in the period carries the same fault, so we fix the A2X mapping first, rebuild the periods from the settlement data, then make a single adjustment that we can explain line by line if HMRC ever asks.