Nine VAT Compliance Mistakes and How to Avoid Them

Expanding your ecommerce business internationally opens exciting growth opportunities, but it also introduces complex tax obligations. One of the most critical areas to get right is VAT compliance. Unfortunately, many businesses unknowingly make costly mistakes that can lead to penalties, audits, and reputational damage. 

This article explores the most common VAT pitfalls ecommerce sellers face and offers practical guidance on how to avoid them. 

Top VAT Compliance Mistakes Ecommerce Businesses Make 

1. Delaying VAT Registration 

Many sellers wait until they’ve already exceeded a country’s VAT threshold before registering. For sellers based in the EU, for example, the threshold for cross-border sales is just €10,000. Late registration can result in backdated VAT payments, interest charges, and fines. 

2. Misunderstanding VAT Obligations Across Jurisdictions 

Each country has its own VAT rules, filing deadlines, and documentation requirements. Assuming that one-size-fits-all can lead to non-compliance. For example, VAT treatment for digital services differs significantly between the EU, UK, and Canada

3. Incorrect VAT Rate Application 

Applying the wrong VAT rate, either due to outdated information or misclassification of goods, can result in underpayment or overcharging customers. This is especially risky for products like food, books, or children’s clothing, which may be subject to reduced or zero rates.

4. Overlooking Marketplace VAT Rules 

If you sell through platforms like Amazon or eBay, you may assume they handle all VAT obligations. While marketplaces may collect VAT on certain transactions, you’re still responsible for registration, reporting, and compliance in many cases. 

5. Ignoring VAT on Imports 

Importing goods into the EU or UK requires VAT to be paid at the border unless you’re registered for schemes like IOSS or Postponed VAT Accounting. Failing to account for import VAT can lead to delays and unexpected costs. 

6. Poor Record Keeping 

Accurate and organised records are essential for VAT reporting and audits. Missing invoices, inconsistent data, or a lack of transaction logs can make it difficult to file correctly and defend your position during an audit. 

7. Not Using Simplified VAT Schemes 

Schemes like the One Stop Shop (OSS) and Import One Stop Shop (IOSS) simplify VAT reporting across the EU. Many businesses miss out on these schemes due to a lack of awareness, resulting in unnecessary administrative burdens. 

8. Failing to Monitor Thresholds 

Sales thresholds for VAT registration vary by country and can change over time. Without automated tracking, businesses risk crossing thresholds without realising it, leading to late registration and penalties. 

9. Inadequate Internal Processes 

VAT compliance isn’t just about filing returns; it requires robust internal systems for invoicing, tax calculation, and reporting. Many businesses rely on manual processes that are prone to error and difficult to scale. 

How to Stay VAT Compliant 

While VAT compliance can be complex, it’s manageable with the right approach: 

  • Stay Informed: Regularly review VAT rules in your target markets.
  • Automate Where Possible: Use platforms that track thresholds and apply correct VAT rates.
  • Keep Accurate Records: Maintain detailed logs of all transactions, invoices, and filings.
  • Seek Expert Advice: Work with VAT specialists who understand ecommerce and international tax law. 

Supporting Your Compliance Journey 

At SimplyVAT, our mission is to help ecommerce businesses navigate international VAT with confidence.  

We offer: 

  • VAT registration and filing services across the UK, EU, and Canada
  • Guidance on VAT schemes like OSS and IOSS
  • Tools to automate compliance
  • Support during audits and assistance with VAT refunds 

Whether you're just starting to sell internationally or scaling into new markets, we’re here to help you stay compliant and avoid costly mistakes. 

Need help with VAT compliance?

Get in touch with our team for expert support tailored to your ecommerce business. 


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