BR-AE-05:Reverse charge invoice line must have 0% VAT rate
Fix: Invoice Navigator automatically fixes this issue by correcting the `cac:InvoiceLine` element in your Invoice. Upload your invoice to fix this automatically.
When an invoice line uses the reverse charge VAT category, the VAT rate must be 0%. Reverse charge means the buyer accounts for VAT, so seller charges zero VAT.
Engine Classification
Set VAT rate to 0% for reverse charge invoice lines per EN16931 BR-AE-05
Confidence: 95% · Applied automatically in pipeline
What is BR-AE-05?
BR-AE-05 is a fatal validation rule defined in the EN 16931 specification. It validates the Percent element under Item > ClassifiedTaxCategory 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:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory[cbc:ID='AE']/cbc:Percent
Why This Error Matters
Invoice will be rejected by validation. Reverse charge mechanism requires 0% VAT rate - any other rate is logically incorrect.
BR-AE-05 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-AE-05
- ·Specification: EN 16931
How to Fix It
Identify reverse charge lines
Check VAT rate values
Set rate to zero
Verify consistency
Validate the result
Before / After
<Invoice> <cac:InvoiceLine>INVALID_CODE</cac:InvoiceLine> </Invoice>
<Invoice> <cac:InvoiceLine>VALID_CODE</cac:InvoiceLine> </Invoice>
Technical Reference
//cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory[cbc:ID='AE']/cbc:PercentCommon Causes
- ·Non-zero VAT rate applied to reverse charge line
- ·Standard VAT rate left on line when changing to reverse charge
- ·ERP did not automatically set rate to zero
- ·Manual error when setting up reverse charge item
- ·VAT rate field not cleared when category changed
Seeing this in production? The API handles BR-AE-05 automatically. See the fix response →
Frequently Asked Questions
When an invoice line uses the reverse charge VAT category, the VAT rate must be 0%. Reverse charge means the buyer accounts for VAT, so seller charges zero VAT.
Invoice Navigator automatically fixes this issue by correcting the `cac:InvoiceLine` element in your Invoice. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, BR-AE-05 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of BR-AE-05 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
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Last updated: 27 February 2026
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