BR-Z-06:In a Document level allowance (BG-20) where the Document level allowance VAT...
Fix: Invoice Navigator automatically fixes this issue by correcting the `cac:AllowanceCharge` element in your Invoice (BR-Z-06). Upload your invoice to fix this automatically.
VAT amount for category Z must be zero.
Engine Classification
Set VAT rate to 0% for zero-rated document-level allowances per EN16931 BR-Z-06
Confidence: 95% · Applied automatically in pipeline
What is BR-Z-06?
BR-Z-06 is a fatal validation rule defined in the EN 16931 specification. It validates the Percent element under TaxCategory in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: //cac:AllowanceCharge[cbc:ChargeIndicator='false']/cac:TaxCategory[cbc:ID='Z']/cbc:Percent
Why This Error Matters
Invoice will be rejected. Zero rated VAT (category Z) requires seller VAT registration, 0% rate, and correct breakdown. Zero rate is different from exemption - it still requires tax compliance.
BR-Z-06 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-Z-06
- ·Specification: EN 16931
How to Fix It
Check Z tax amount
TaxAmount for category Z
Set to zero
Must be exactly 0.00
Before / After
<Invoice> <cac:AllowanceCharge>INVALID_CODE</cac:AllowanceCharge> </Invoice>
<Invoice> <cac:AllowanceCharge>VALID_CODE</cac:AllowanceCharge> </Invoice>
Technical Reference
//cac:AllowanceCharge[cbc:ChargeIndicator='false']/cac:TaxCategory[cbc:ID='Z']/cbc:PercentCommon Causes
- ·Zero rated allowance has non-zero VAT rate
- ·BT-96 must be 0 for category Z allowance
- ·Document allowance Z category has positive rate
- ·Zero rate allowance needs 0% VAT percentage
- ·Allowance rate field not zero for Z category
Seeing this in production? The API handles BR-Z-06 automatically. See the fix response →
Frequently Asked Questions
VAT amount for category Z must be zero.
Set TaxAmount to 0.00. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, BR-Z-06 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of BR-Z-06 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including zero rate vat must be zero.
Related Errors
Related Content
Last updated: 27 February 2026
Validate your invoice
Drop your XML here to check for BR-Z-06
Auto-fix BR-Z-06 in seconds
Upload your invoice and we fix this error automatically. Financial fields are never touched.