5 VAT Mistakes UK E-Commerce Businesses Are Still Making in 2025

UVAT Is Still Catching E-Commerce Businesses Off Guard

The UK’s VAT rules can be complex enough — but for online sellers, marketplace traders, and DTC brands, they’re a constant source of frustration. In 2025, HMRC is more active than ever in reviewing VAT compliance, particularly for small businesses trading online.

Whether you’re using Shopify, Amazon, Etsy, or your own checkout system, here are five VAT mistakes e-commerce businesses are still making — and how to fix them.

1. Registering Too Late (or Not at All)

The VAT registration threshold is currently £90,000 in taxable turnover (2025 figure). Many e-commerce sellers don’t realise how quickly they cross this threshold, especially when combining multiple platforms.

What to do:
Track your rolling 12-month revenue across all platforms — not just per channel. Register before you breach the limit to avoid fines and backdated liabilities.

2. Using the Wrong VAT Scheme

Not all e-commerce businesses benefit from the standard scheme. The Flat Rate Scheme or Cash Accounting Scheme may offer advantages — but only if correctly applied.

What to do:
Review your product mix, margins, and transaction volume. A VAT review can identify whether you’re on the most cost-effective scheme.

3. Failing to Charge the Right Rate on Shipping

Yes, shipping can be VATable — but it depends on what’s being shipped, and how it’s invoiced. Many businesses charge 0% or miss it altogether.

What to do:
Check whether your delivery fees follow the same VAT treatment as the product. For most physical goods, shipping is VATable at 20%.

4. Overclaiming on Non-Business Expenses

It’s easy to overclaim VAT on purchases that aren’t strictly business-related — especially with mixed-use items or personal subscriptions like software.

What to do:
Keep clear records, separate business and personal purchases, and avoid claiming VAT on anything not wholly for business use.

5. Not Staying Compliant with Making Tax Digital (MTD)

All VAT-registered businesses must now follow MTD rules — using compatible software and digital links between systems. Some are still submitting manually or via spreadsheets.

What to do:
Ensure you’re using MTD-compliant software (like Xero or QuickBooks), with digital records and submission through HMRC’s API.

Don’t Let VAT Mistakes Hold Back Your Growth

With margins often tight and cashflow under pressure, getting VAT right is essential for e-commerce businesses in 2025. Small errors can lead to big bills — or unnecessary overpayments.

At SIA, we specialise in helping online businesses stay VAT compliant, efficient and stress-free.

Need a VAT health check?

Speak to our team today to get clear, professional advice tailored to your role or business.

📞 Call us or book a free initial consultation
📩 [email protected]