VAT Leak CheckFind VAT leaks in your Shopify order history
A free audit of cross-border order VAT. Upload your orders CSV and see which orders look wrong against current thresholds.
The problem
Tax rules at checkout can change without notice. VAT thresholds for IOSS (EUR 150), the UK (GBP 135), Australia (A$1,000) and New Zealand (NZ$1,000) apply at checkout, but when rules shift, merchants usually find out weeks later during bookkeeping or VAT filing.
Nobody rechecks historical orders against current rules, so leaked VAT and overcharges build up unnoticed.
The solution
Upload your Shopify order CSV export. VAT Leak Check will:
- Check every order against the current VAT threshold for its destination country
- List leaked and overcharged orders with the reason
- Show month by month when the rule behaviour changed
- Export the results for your accountant
100% browser-based. Your data never leaves your computer. Delete personal columns before uploading if you prefer.
How it works
- Export. Download the orders CSV from Shopify (Taxes, Shipping Country and Lines columns required).
- Upload. Drag and drop or select the file. Optional: remove customer name and address columns first.
- Analyze. The rules engine compares each order value with EUR 150 (EU), GBP 135 (UK), A$1,000 (AU) and NZ$1,000 (NZ).
- Review. See flagged orders, tax differences and the trend chart.
- Export. Download a results CSV: order ID, destination, value, tax charged, tax expected and reason.
Key features
Multi-country
EU IOSS, UK, Australia and New Zealand thresholds, each with source and date.
Drift detection
A monthly trend chart shows when VAT behaviour changed.
Privacy-first
Processed in your browser. No data storage, no server transmission, no tracking.
Free
No subscription, no upsell. Auditing should be accessible.
Accountant-ready
Export a detailed CSV for reconciliation or professional review.
Informational
Every rule cites its source (HMRC, EU, ATO, IRD) and effective date.
Free to use
Free
No subscription. No data tracking. No premium tiers.
Legal and privacy
Informational tool only, not tax advice. Each VAT rule cites its source and effective date. Consult a tax professional before acting on these results.
Browser-only. Your CSV is processed entirely in your browser. Nothing is sent to our servers, stored remotely or shared.
No Shopify affiliation. Built for Shopify order exports. Not endorsed by or affiliated with Shopify, Inc.