If you sell on TikTok Shop, returns aren't an edge case. They're a normal, predictable slice of your sales, and viral products can come back in waves weeks after the spike. The problem is that most sellers book the full sale as revenue on day one, then quietly absorb the refunds later. That overstates a good month and makes a bad one look like a crash.
The fix is a returns reserve: you hold back the revenue you don't realistically expect to keep, so your profit and your VAT both tell the truth.
This guide is for UK TikTok Shop sellers, whether you run as a sole trader or a limited company. We'll cover when you can actually reduce your VAT on a refund, how to estimate and post a returns reserve, what changes under the revised FRS 102 from 2026, and who accounts for VAT when TikTok is the one collecting it. We'll work through the numbers with an illustrative example.
Why do TikTok Shop returns need their own accounting treatment? {#why-returns}
Because a sale you'll refund next month isn't really income this month. A returns reserve estimates the refunds you expect on sales you've already made, so revenue and profit reflect what you'll keep rather than what briefly hit your TikTok balance.
TikTok Shop sales behave differently from a steady online store. A clip lands, orders surge, and a chunk of those buyers send the product back inside the returns window. If you recognise every order as final revenue at dispatch, your reported sales for the viral period are inflated, and the refunds land in a later period where they look like a sudden drop.
That mismatch matters for three reasons. It distorts the gross margin you use to make stocking and pricing decisions. It can push your VAT figures around if you don't adjust them correctly. And it makes your year-end accounts less reliable, which is exactly what your accountant, your lender, or a future buyer of the business will scrutinise.
A returns reserve smooths this out by matching the cost of returns to the period the sales were made in.
What is a returns reserve and how do you calculate it? {#what-is-reserve}
A returns reserve (sometimes called a returns provision or a refund liability) is an amount you set aside against sales already recorded, representing the refunds you expect to pay out on those sales.
The calculation has two parts, because a return reverses both a sale and a cost.
Step 1: estimate your return rate. Use your own TikTok Shop data, not a guess. Take refunds issued over a recent period and divide by gross sales in the matching period. If different product lines behave very differently (fashion returns far more than, say, phone cases), calculate a rate per category and blend them.
Step 2: apply the rate to the sales you still expect returns on. Returns mostly come from recent sales inside the returns window, so apply your rate to that exposed pool rather than to all-time sales.
Step 3: split the reserve into its two halves.
- A refund liability for the sales value you expect to give back. This reduces revenue.
- A refund asset, being the stock you expect to get back and resell, measured at its cost less any expected recovery costs (return shipping, repackaging, write-offs). This reduces cost of sales.
The net hit to profit is the lost margin on the expected returns, not the full sale value, because you get the goods back. We'll show this with figures in the illustrative example below.
In practice, the most common mistake we see is sellers reserving against the sale price only and forgetting the matching stock coming back. That overstates the cost of returns and makes the business look less profitable than it is.
How do returns and refunds affect your VAT? {#vat}
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When you refund a customer, you can reduce the output VAT you originally charged, but only once the refund is actually made and you've issued a credit note. You can't reduce VAT for refunds you merely expect.
This is the single most important VAT point for returns, and it's where the accounting and the VAT diverge. Your returns reserve is an accounting estimate of future refunds. VAT, by contrast, follows the actual event.
Since 1 September 2019, HMRC's rules on a decrease in price are strict. A decrease in price for VAT happens when you make a refund to the customer (or the person entitled to receive it). You then have 14 days to issue a credit note, and you account for the reduction in the VAT period in which the decrease takes place. The key limitation is that you can only reduce the VAT you pay to HMRC when a refund is actually made, so an expected or provisioned refund does not reduce your VAT.
On the VAT return itself (the standard 20% rate applies to most physical goods), a refund you've made reduces:
| VAT return box | What it shows | Effect of a refund you've made |
|---|---|---|
| Box 1 | VAT due on your sales (output tax) | Decreases by the VAT on the refunded amount |
| Box 6 | Total value of sales excluding VAT | Decreases by the net value of the refunded sale |
| Box 4 | VAT you reclaim on purchases (input tax) | Unchanged by a customer refund (this box handles credit notes from your suppliers) |
So the rule of thumb is simple. The returns reserve is an accounting entry that never touches your VAT return. The actual refund, evidenced by a credit note, is what reduces Box 1 and Box 6, in the period the refund is made.
One thing a refund is not: a bad debt. If a customer simply never pays, that's a separate VAT bad debt relief claim with its own conditions, including the debt being at least six months overdue and written off in your VAT accounts. You can't issue a credit note just because you weren't paid. For day-to-day returns, you're in refund-and-credit-note territory, not bad debt.
If keeping the reserve and the VAT adjustments straight feels fiddly, that's exactly the kind of thing our bookkeeping services are built to handle for high-volume sellers.
Who accounts for the VAT, you or TikTok Shop? {#who-accounts}
It depends on where your stock is and whether you're a UK or overseas business. For many sales, TikTok Shop is treated as the deemed supplier and accounts for the VAT itself, which changes how your refunds flow.
TikTok Shop is an online marketplace, so HMRC's marketplace VAT rules apply. There are two situations where the marketplace, not you, is liable for the UK VAT:
- Goods of any value located in the UK at the point of sale, sold by an overseas business through the marketplace. The marketplace is liable for the VAT. The overseas seller is treated as making a zero-rated "deemed supply" of the goods to the marketplace, which then accounts for VAT on the sale to the customer.
- Consignments of £135 or less located outside the UK, sold through the marketplace to customers in Great Britain. UK supply VAT is charged at the point of sale, and the marketplace is liable for it.
If you're a UK-established seller holding your own stock in the UK, those deemed-supplier rules for overseas sellers don't apply to you, so you account for VAT on your sales in the normal way once you're VAT registered (the registration threshold is £90,000 of taxable turnover on a rolling 12-month basis for 2025/26).
Why this matters for returns: where TikTok is the deemed supplier and collected the VAT, it's TikTok that adjusts that VAT on a refund, not you. Where you're the one accounting for VAT (the typical UK seller holding UK stock), the credit-note adjustment above is yours to make. Getting this wrong is one of the more expensive mistakes in this niche, so if your set-up is at all mixed, it's worth a proper review. Our guidance for TikTok Shop creators and sellers digs into where these lines fall.
How does the new FRS 102 revenue standard change returns accounting? {#frs102}
For limited companies, the revised FRS 102 brings in a clearer, more prescriptive model for sales with a right of return, effective for accounting periods beginning on or after 1 January 2026. In short: you recognise revenue only on the goods you expect to keep, and you book a refund liability and a refund asset for the goods you expect back.
The Financial Reporting Council completed its periodic review of FRS 102 in March 2024, with a principal effective date of 1 January 2026. The rewritten revenue section is closely aligned to the international five-step revenue model, with more detailed rules than the old version.
For sales with a right of return, the mechanics are:
- Recognise revenue for the products you do not expect to be returned, plus the matching cost of sales.
- Recognise a refund liability for the consideration you don't expect to be entitled to keep, in other words the sales value of the products you expect to come back.
- Recognise a refund asset representing your right to recover those products, measured at the former carrying amount of the stock (its cost) less any expected costs of recovering it.
That's the formal version of the returns reserve we described earlier. If you already operate a sensible reserve, you're most of the way there. The 2026 change mainly tightens up how you present and measure the two sides, the liability and the asset, rather than reinventing the idea.
Sole traders and partnerships preparing accounts on a simpler basis won't apply FRS 102 in the same way, but the underlying logic, don't bank revenue you'll refund, is just as relevant for an honest set of figures and a correct tax position.
Illustrative example: posting a returns reserve at month end {#example}
Illustrative example. Maya runs a UK limited company selling phone accessories on TikTok Shop. She holds her own stock in the UK and is VAT registered, so she accounts for her own VAT. One product goes viral.
In May 2026 she sells 100 units at £30 each including VAT. Each unit costs her £12. Her own data shows a 20% return rate on this product line, and on average it costs her £1 per returned unit to get the stock back and repackage it. The standard VAT rate of 20% applies.
First, strip out the VAT, because revenue is recorded net:
- Gross sales: 100 x £30 = £3,000
- VAT element: £3,000 / 6 = £500 (the 1/6 VAT fraction on a 20%-inclusive price)
- Net sales: £3,000 - £500 = £2,500
- Cost of sales: 100 x £12 = £1,200
Now apply the 20% return rate to estimate the reserve on the 20 units she expects back:
| Item | Calculation | Amount |
|---|---|---|
| Refund liability (net sales reversed) | 20 units x £25 net | £500 |
| Refund asset (stock coming back, at cost) | 20 units x £12 | £240 |
| Less expected recovery costs | 20 units x £1 | (£20) |
| Refund asset, net | £240 - £20 | £220 |
| Net profit impact of the reserve | £500 - £220 | £280 |
So at month end Maya reduces revenue by £500 and reduces cost of sales by £220, a net £280 hit to profit. That £280 is the lost margin on the units she expects to refund, which is the honest cost of those returns, not the full £600 of gross sales.
Crucially, she makes no VAT adjustment for this reserve. The £500 VAT she charged stays in Box 1 for now. Only when she actually refunds a customer and issues a credit note does she reduce her VAT: refund one £30 unit and she reduces Box 1 by £5 (the VAT) and Box 6 by £25 (the net), in the period she makes that refund.
If in June the actual returns come in at 18 units rather than 20, she trues up the reserve, releasing the small excess back to profit. The reserve is an estimate you revisit, not a one-off entry.
To sense-check the take-home effect of profits like these flowing through to you, our self-employed tax calculator and income tax calculator are a quick gut-check before the real return.
Do TikTok Shop returns affect what you report to HMRC? {#reporting}
Returns reduce your taxable profit, so they reduce the income you ultimately pay tax on, but they don't change your obligation to report. And separately, TikTok Shop now reports your sales data to HMRC regardless of returns.
Two things to keep straight.
First, on your own reporting: your taxable profit is sales less allowable costs, and genuine refunds reduce the income figure. If your total trading income for the year is more than the £1,000 trading allowance, you need to tell HMRC, even if returns later eat into your margin. Below £1,000 of gross trading income, the trading allowance generally makes it tax-free and you usually don't need to report it.
Second, on TikTok's reporting: under the digital platform reporting rules, platforms began collecting seller data from 1 January 2024 and report it to HMRC by 31 January each year. There's a light-touch exemption: your details aren't reported if you make fewer than 30 sales of goods in a calendar year and receive 2,000 euros or less (roughly £1,700) from them. Being reported does not automatically mean you owe tax, it just means HMRC can see the figures, so your own records need to reconcile to them. Returns you've processed are part of why your net position differs from the gross sales TikTok reports.
The practical takeaway: keep your returns reserve, your actual refunds, and your VAT credit notes all evidenced, so the story your accounts tell matches the data HMRC already holds.
Frequently asked questions {#faqs}
Can I reduce my VAT for returns I expect but haven't refunded yet?
No. You can only reduce output VAT once you've actually made the refund and issued a credit note, which you must do within 14 days of the decrease in price, accounting for it in the VAT period the refund falls in. A returns reserve is an accounting estimate of future refunds and never touches your VAT return.
Does a returns reserve reduce my profit by the full sale value?
No. It reduces profit only by the lost margin on the expected returns, because you also get the stock back. You book a refund liability for the net sales you expect to reverse and a refund asset for the returned stock at its cost less recovery costs. The net of those two is the real cost of the returns.
Who accounts for VAT on my TikTok Shop sales, me or TikTok?
If you're a UK-established seller holding your own stock in the UK and you're VAT registered, you account for the VAT yourself. TikTok Shop, as an online marketplace, is the deemed supplier liable for the VAT where an overseas business sells UK-located goods through it, or where consignments of £135 or less are sold from outside the UK. In those cases TikTok, not you, adjusts the VAT on a refund.
What's the difference between a return and a VAT bad debt?
A return is when the customer sends goods back and you refund them, which you handle with a credit note and a VAT adjustment once refunded. A bad debt is when a customer never pays at all. VAT bad debt relief is a separate claim with its own conditions, including the debt being at least six months overdue and written off in your VAT accounts. You can't raise a credit note simply because you weren't paid.
Do I have to use a returns reserve if I'm a sole trader?
The formal FRS 102 refund-liability rules apply to companies preparing accounts under that standard, with the revised version effective for periods beginning on or after 1 January 2026. As a sole trader you may prepare simpler accounts, but the principle still matters: don't treat revenue you'll refund as final income. A sensible reserve gives you a truer profit and a correct tax position.
Why does TikTok report my sales to HMRC, and does it mean I owe tax?
Under the digital platform reporting rules, online platforms collect and report seller data to HMRC, with data collected from 1 January 2024 reported by 31 January each year. Being reported does not automatically mean you owe tax. It simply means HMRC can see your figures, so your records, including returns and refunds, should reconcile to what the platform reports.
Talk to an accountant who knows TikTok Shop
Returns reserves, marketplace VAT, and the 2026 FRS 102 changes are exactly the sort of thing that's easy to get subtly wrong and expensive to unwind. If you'd like your TikTok Shop numbers set up properly the first time, book a free call with a Zmartly accountant through our support for TikTok Shop sellers. We'll get your reserve, your VAT, and your reporting all telling the same true story.
