E-commerce Tax Compliance: VAT, GST, and Sales Tax
Tax compliance is a significant operational complexity for e-commerce businesses selling across borders. VAT (EU, UK), GST (Australia, New Zealand, Canada), and Sales Tax (US) have different rules, thresholds, rates, and filing requirements. Getting tax wrong creates financial liability; automating it correctly is an operational efficiency and compliance necessity.
UK and EU VAT
UK VAT registration threshold: £85,000 turnover. Once registered, charge VAT on all applicable sales. EU VAT: One Stop Shop (OSS) enables single EU registration for reporting all EU distance sales. B2C digital services to EU customers require VAT at destination country rate (Mini One Stop Shop — MOSS). Import OSS (IOSS) handles VAT for goods under €150 shipped to EU from outside.
US Sales Tax
US Sales Tax operates at state level — 45 states plus DC have sales tax, with different rates and product taxability rules. Economic nexus rules (post-South Dakota v. Wayfair 2018) require collection once a threshold of sales in a state is reached — typically $100K revenue or 200 transactions. Managing compliance across 45+ jurisdictions manually is impractical; automation is essential.
Tax Automation Tools
Avalara and TaxJar are the leading tax automation platforms for e-commerce — automatically calculating the correct tax rate for each transaction based on location, product type, and nexus status. Both integrate natively with Shopify, Magento, and most major platforms. Essential for cross-border or multi-state selling.