errorEN16931
BR-O-11:Mixed VAT categories with "Not subject to VAT". When using VAT category O (Not subject to VAT), no other VAT categories
Mixed VAT categories with "Not subject to VAT". When using VAT category O (Not subject to VAT), no other VAT categories are allowed on the invoice.
We can fix this automatically
AUTO-FIX1. Check VAT category consistency. 2. Ensure rates match categories. 3. Add missing identifiers.
No manual changes needed
Upload and Fix NowWhy This Error Matters
Invoice will be rejected. "Not subject to VAT" (category O) has strict rules: no VAT identifiers allowed, no other categories permitted, and exemption reason required. Non-compliance prevents validation.
Common Causes
- Invoice with O category contains other VAT categories
- "Not subject to VAT" must be the only category on invoice
- O breakdown found alongside S, E, or other categories
- Mixed VAT treatment incompatible with O category
- All items must be O when using out-of-scope category
Frequently Asked Questions
Mixed VAT categories with "Not subject to VAT". When using VAT category O (Not subject to VAT), no other VAT categories are allowed on the invoice.
Mixed VAT categories with "Not subject to VAT". When using VAT category O (Not subject to VAT), no other VAT categories are allowed on the invoice. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, BR-O-11 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted.
Many instances of BR-O-11 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues.
See Also
Last updated: 16 January 2026
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