UK VAT is one of the most misunderstood areas of tax for international eCommerce sellers. Whether you're a UK-based seller or an international seller shipping goods to UK customers, VAT obligations can catch you off guard — and the penalties for non-compliance are significant.
This guide covers everything: registration thresholds, Making Tax Digital (MTD), how VAT works on Amazon and Shopify sales, cross-border rules, and practical steps to stay compliant in 2025.
🇬🇧 Who This Guide Is For
UK-based eCommerce sellers, international sellers shipping to UK customers, Amazon sellers storing goods in UK fulfilment centres, and Shopify/eBay/Etsy sellers with UK customer bases.
What Is VAT and How Does It Work for eCommerce?
Value Added Tax (VAT) is a consumption tax applied at each stage of the supply chain. For eCommerce sellers, the practical effect is: you charge VAT on your sales, you pay VAT on your purchases, and you remit the difference to HMRC. The standard UK VAT rate is 20%. Reduced rate (5%) applies to some goods like children's car seats and energy products. Zero rate (0%) applies to most food, children's clothing, and books.
UK VAT Registration Thresholds in 2025
Mandatory Registration
You must register for UK VAT if:
- Your UK taxable turnover exceeds £90,000 in any rolling 12-month period (threshold increased from £85,000 in April 2024)
- You expect your turnover to exceed £90,000 in the next 30 days alone
- You're a non-UK business making taxable sales in the UK (no threshold — registration required from the first sale)
- You store goods in the UK (including Amazon FBA inventory) — registration required from first sale, no threshold
⚠ International sellers using Amazon FBA UK: Storing inventory in Amazon's UK fulfilment centres means you have a supply of goods in the UK. This creates an immediate VAT obligation regardless of your sales volume. Many international sellers are unaware of this and are operating non-compliantly.
Voluntary Registration
Even below the threshold, you can voluntarily register for VAT. This is often beneficial if you buy a lot of VAT-rated goods or services for your business (you can reclaim that VAT), or if your customers are mainly VAT-registered businesses who prefer to receive VAT invoices.
Making Tax Digital (MTD) for VAT
Since April 2022, all VAT-registered businesses in the UK must comply with Making Tax Digital rules. This means:
- You must keep digital records of all VAT transactions
- You must submit VAT returns using MTD-compatible software (QuickBooks, Xero, or similar)
- You cannot file manually via the HMRC portal
At TSA & COO, all UK VAT clients are automatically set up on MTD-compliant systems as part of our onboarding. We handle returns via QuickBooks or Xero with direct HMRC API integration.
How VAT Works on Amazon UK Sales
Amazon as a Deemed Supplier (Post-Brexit)
Since January 2021, Amazon acts as the deemed supplier for:
- All sales by non-UK sellers to UK customers (regardless of order value)
- All sales by UK sellers where goods are outside the UK at the point of sale
In these cases, Amazon charges and collects VAT on the transaction and accounts for it to HMRC directly. Your VAT return may show reduced output tax as a result.
UK Seller Selling UK-Held Stock
If you're VAT-registered and your stock is in a UK warehouse or FBA centre:
- You charge and collect 20% VAT on each sale
- You include this in your quarterly VAT return
- You can reclaim VAT on eligible business purchases (Amazon fees, storage, prep services)
UK VAT Sorted — Without the Stress
Our VAT specialists handle registration, quarterly MTD-compliant returns, and all HMRC correspondence on your behalf. Never miss a filing deadline again.
Get Your VAT Sorted →EU VAT After Brexit: OSS and IOSS
If you sell to EU customers from the UK, you need to understand two additional regimes:
Import One Stop Shop (IOSS)
For goods shipped from outside the EU with a value under €150, you can register for IOSS and collect EU VAT at the point of sale, then file a single monthly return covering all EU member states. Without IOSS, import VAT is charged when the parcel is delivered, creating a poor customer experience and often abandoned deliveries.
One Stop Shop (OSS)
For goods already in the EU at the time of sale (e.g., held in an EU fulfilment centre), OSS allows you to file a single quarterly return covering all EU member states where you sell. Without OSS, you'd need individual VAT registrations in each EU country.
VAT on Shopify and Other Platform Sales
If you sell through your own Shopify store to UK customers, you must configure Shopify to add UK VAT correctly. Key settings:
- Enable UK taxes in Shopify Tax Settings
- Apply VAT at 20% to standard-rated goods
- Ensure zero-rated and exempt goods are correctly categorised
- Issue VAT invoices for all B2B sales
Shopify does not file your VAT return — it only helps you collect the tax. You are still responsible for the quarterly return to HMRC.
VAT Filing: Dates, Frequency and What to Include
Most UK VAT-registered businesses file quarterly. Your due date is typically one month and seven days after the end of your VAT quarter (e.g., if your quarter ends 31 March, your return is due 7 May). Your return must include:
- Total value of sales (Box 6)
- Output VAT on sales (Box 1)
- Input VAT on purchases (Box 4)
- Net VAT payable or reclaimable (Box 5)
- Total value of purchases (Box 7)
✓ Repayment returns: If your input VAT exceeds your output VAT (common when you have large purchases), HMRC will repay the difference. Most repayment claims are processed within 30 days — though HMRC may select you for a compliance check.
Penalties for Late Filing and Payment
HMRC introduced a new penalty regime in January 2023. Key points:
- Late filing: 1 penalty point per late return. Four points in one year triggers a £200 fine.
- Late payment: 2% of outstanding VAT after 15 days, 4% after 30 days, plus daily interest at 2.5% above Bank of England base rate.
These penalties compound quickly. A missed quarterly return and the associated late payment can easily cost £500–£2,000 for a £50K/quarter business.