Shopify VAT: Common UK Seller Mistakes to Fix

Shopify does not register you for VAT, file your VAT return, or decide when you must join the scheme. Shopify Tax can calculate and collect VAT at checkout once you enter your VAT number and the countries you are registered in, but the legal responsibility for registration, invoicing, and payment to HMRC sits with you as the seller. Get any of that wrong and the mistakes tend to be expensive rather than small, because HMRC can assess VAT retrospectively from the date you should have registered.

We work with specialist accountants for Shopify sellers who have crossed the threshold without noticing, invoiced customers incorrectly, or reconciled Shopify payouts instead of gross sales. This article covers the mistakes we see most often, the primary HMRC and Shopify rules behind them, and a worked example most guides skip.

Does Shopify collect and pay VAT for you?

No. Shopify Tax calculates VAT on UK and EU orders and adds it to the checkout total, but only once you have entered your VAT registration details in the Shopify admin under Settings and Taxes. Shopify never remits anything to HMRC on your behalf, and it will happily keep charging (or not charging) the wrong rate indefinitely if your settings are stale.

One nuance most guides skip: the marketplace facilitator rules that make Amazon or eBay collect and account for VAT on certain sales do not apply to your own Shopify store. Those rules only apply to marketplaces that connect independent third-party sellers with buyers. On your own domain, you are the merchant of record for VAT purposes, full stop, which is exactly why the mistakes below fall on you rather than on Shopify.

The five Shopify VAT mistakes we fix most often

1. Missing the £90,000 rolling 12-month threshold. As of 2025, UK VAT registration becomes compulsory once your taxable turnover exceeds £90,000 in any trailing 12-month window, not the tax year. This threshold rose from £85,000 on 1 April 2024, so older articles and forum threads quoting £85,000 are out of date. See gov.uk's VAT registration thresholds and our note on how the rolling 12-month threshold is calculated for the month-by-month check most sellers skip.
2. Assuming Shopify behaves like a marketplace. Sellers who also list on Amazon or eBay sometimes assume Shopify handles VAT collection the same way. It does not; your own store's VAT compliance is entirely on you.
3. Not switching on Postponed VAT Accounting (PVA). If you import stock into the UK, PVA lets you declare and recover import VAT on the same VAT return instead of paying it upfront at the border, which matters enormously for cash flow. See HMRC's PVA guidance.
4. Ignoring the £135 import VAT threshold. For consignments valued at £135 or less sent directly to UK customers, VAT is usually collected at the point of sale rather than at import; get this wrong on cross-border listings and you can end up double-charging or under-declaring. See gov.uk's guidance on VAT for imported goods.
5. Reconciling net payouts instead of gross sales. Shopify Payments settlements land net of fees, refunds, and currency conversion. Bookkeeping straight from the settlement report understates turnover, which can quietly hide a threshold breach and creates a genuine Cash Gap between what you think you have banked and what you actually owe HMRC.

Does Shopify declare to HMRC?

Shopify does not automatically report your own store's sales to HMRC under the OECD-based digital platform reporting rules. Those rules require reporting platform operators, such as Etsy, eBay, Amazon and Vinted, to send seller data to HMRC each January, but they target platforms that connect independent third-party sellers with buyers rather than your own branded store. See gov.uk's reporting rules for digital platforms.

That does not mean HMRC has no visibility of your turnover. Your own VAT returns, Shopify Payments settlement data, and card acquirer records are all available to HMRC on request, and discrepancies between reported turnover and payment processor data are a common trigger for enquiries.

How to get a VAT invoice from Shopify

VAT on your Shopify subscription and app fees

Shopify subscription and app charges are typically billed by a non-UK Shopify entity. If you are UK VAT registered, you self-account for VAT on these charges under the reverse charge on your own VAT return rather than being charged VAT directly by Shopify. Download the invoice itself from Settings, then Billing, in your Shopify admin. See Shopify's billing documentation.

VAT invoices for your customers

To have VAT itemised correctly on order receipts, enter your VAT registration number and business address under Settings, then Taxes and duties. For import VAT you have paid on stock, HMRC issues a monthly C79 certificate, which is the document you need to reclaim that VAT on your return. See gov.uk's C79 guidance.

Worked example: crossing the £90k threshold mid-year

Here is a case I see almost every quarter. A seller's rolling 12-month Shopify gross sales hit £91,200 at the end of August 2025, comfortably over the £90,000 threshold. Under the rules, they must notify HMRC by 30 September 2025, 30 days after the end of the month in which they crossed the threshold, and their effective VAT registration date is 1 October 2025 whether or not their VAT number has actually arrived by then.

The gap between the effective date and the VAT number arriving is where most sellers get stuck. Here is how we walk clients through it:

1. Work out the VAT-inclusive price from 1 October. A product that sold for £30 before registration is now treated as VAT-inclusive from the effective date: £25 net plus £5 VAT, using the standard 20 percent rate divided by six. Sellers who instead add 20 percent on top, making it £36, are overcharging customers and overstating the VAT they will owe HMRC.
2. Invoice without a VAT number, then reissue once it arrives. HMRC allows you to charge and collect VAT from your effective registration date even before the number itself is issued. You cannot show a VAT number on an invoice yet, so most sellers add checkout wording such as "price includes VAT, VAT number to follow" and keep a record of the uplift, then reissue formal VAT invoices, or send a VAT-only credit note, once HMRC confirms the number, typically four to six weeks later.
3. Decide what happens if a customer refuses to pay the VAT uplift. On a Shopify checkout most customers never notice, since the total simply reads higher. Where a B2B customer disputes it, the seller is still liable for output VAT on that sale regardless of what they actually collect, so the £5 in our example comes out of margin rather than off the customer, which is precisely the Cash Gap this article opened with.
4. Reconcile the backdated period on the first VAT return. For every order placed between 1 October and the VAT number finally arriving, the seller must account for output VAT on the full value of those sales using the divide-by-six method above, not the 20 percent addition method, because the checkout prices were not adjusted in real time while the number was pending.

On roughly £9,000 of sales sitting in that gap, that works out to £1,500 of output VAT the seller owes HMRC that was never separately itemised on customer receipts, a shortfall we see catch out sellers who wrongly assume compliance only starts once the VAT number physically arrives rather than from the effective registration date itself.

Final word

Most Shopify VAT mistakes are timing mistakes: missing the month the threshold was crossed, treating the VAT number's arrival as the start date rather than a formality, or reconciling from the wrong sales figure. None of them are unusual, and all of them are fixable if you catch them before HMRC does.

If you want SCA to check how this applies to your ecommerce accounts, book a discovery call and we will map the cleanest treatment before your next VAT return.