Shopify Tax Setup for UK Stores: VAT, OSS, and International Rules

Tax Configuration Is the Least Exciting but Most Important Setup Step

Getting Shopify tax configuration wrong has real consequences: undercharging VAT (you pay the difference), overcharging VAT (customers pay more than required, harming conversion), or non-compliance with international tax rules. This guide covers UK-specific tax configuration for Shopify stores.

Disclaimer: This is educational guidance, not professional tax advice. Consult a qualified accountant for your specific business circumstances.

UK VAT: When Do You Need to Register?

UK VAT registration is required when your taxable turnover exceeds £90,000 in any 12-month rolling period (the threshold as of the 2024/25 tax year — verify current threshold with HMRC). You can voluntarily register below this threshold, which allows you to reclaim input VAT on business purchases.

Once registered, you must charge VAT on taxable supplies at the appropriate rate:

• Standard rate (20%): Most goods and services
• Reduced rate (5%): Children’s car seats, energy-saving products, some health products
• Zero rate (0%): Children’s clothing (under 14), most food, printed books, prescription drugs
• Exempt: Financial services, education, health services (no VAT charged, no VAT reclaimed)

Configuring VAT in Shopify (UK)

• Go to Settings > Taxes and Duties
• Set United Kingdom as your primary tax region
• Enter your VAT registration number
• Check “Charge VAT” for UK orders
• Review tax rates per product — most products default to 20%. Products with reduced or zero rates need to be manually configured.
• Configure whether prices in your store are tax-inclusive or tax-exclusive (UK consumer stores typically show VAT-inclusive prices)

EU Tax Post-Brexit: OSS and IOSS

Since 1 July 2021, UK sellers shipping goods to EU consumers face new VAT rules:

IOSS (Import One-Stop Shop)

For goods under €150 shipped to EU consumers from outside the EU (including UK): you can register for IOSS, collect VAT at the point of sale in the customer’s EU country rate, and report/pay via a single monthly IOSS return in one EU member state.

Without IOSS: customs charges VAT on delivery. The customer receives an unexpected bill, which leads to refused deliveries and negative experiences.

Shopify Markets handles IOSS if you register and enter your IOSS number in Settings > Taxes > EU Tax.

Over €150 to EU

For goods over €150, normal customs duties and import VAT apply. IOSS doesn’t cover this. The customer pays import VAT on delivery unless you use a DDP (Delivered Duty Paid) shipping arrangement.

US Sales Tax

US sales tax is complex — each state has different rates and rules, and post-South Dakota v. Wayfair (2018), many states require out-of-state sellers to collect sales tax above certain economic nexus thresholds (typically $100,000 sales or 200 transactions in a state per year).

Shopify Tax (available on Shopify plans) automates US sales tax collection, calculation, and reporting. It tracks your economic nexus status by state automatically and applies the correct rates. For UK stores with significant US sales ($100K+), Shopify Tax or TaxJar/Avalara integration is essential.

Shopify Tax (Shopify’s Native Tax Tool)

Shopify Tax is included in all Shopify plans for US tax automation. It:

• Automatically calculates sales tax for all US states
• Tracks economic nexus thresholds by state and alerts when you’re approaching registration requirements
• Provides liability reports for filing with each state tax authority
• Integrates with your A2X/Xero accounting sync for accurate tax accounting

For non-US international tax (EU VAT, Canadian GST/HST, Australian GST), consult a tax advisor — these vary by country and depend on your specific sales volumes and customer locations.