BR-AE-10:Reverse charge VAT breakdown must include exemption reason
Fix: Invoice Navigator automatically fixes this issue by correcting the `cac:TaxSubtotal` element in your Invoice (BR-AE-10). Upload your invoice to fix this automatically.
A reverse charge VAT breakdown must include either a VAT exemption reason code meaning "Reverse charge" or exemption text stating "Reverse charge" (or equivalent). This explains why no VAT is charged.
Engine Classification
Add VAT exemption reason code for reverse charge breakdown per EN16931 BR-AE-10
Confidence: 90% · Applied automatically in pipeline
What is BR-AE-10?
BR-AE-10 is a fatal validation rule defined in the EN 16931 specification. It validates the TaxExemptionReasonCode element under ID='AE'] > 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:TaxTotal/cac:TaxSubtotal[cac:TaxCategory/cbc:ID='AE']/cac:TaxCategory/cbc:TaxExemptionReasonCode
Why This Error Matters
Invoice will be rejected by validation. Reverse charge requires explicit justification via exemption reason for tax compliance.
BR-AE-10 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-10
- ·Specification: EN 16931
How to Fix It
Locate reverse charge VAT breakdown
Check for exemption reason
Add exemption reason code
Or add exemption reason text
Validate the result
Before / After
<cac:TaxTotal> <!-- cac:TaxSubtotal is missing --> </cac:TaxTotal>
<cac:TaxTotal> <cac:TaxSubtotal>valid-value</cac:TaxSubtotal> </cac:TaxTotal>
Technical Reference
//cac:TaxTotal/cac:TaxSubtotal[cac:TaxCategory/cbc:ID='AE']/cac:TaxCategory/cbc:TaxExemptionReasonCodeCommon Causes
- ·Reverse charge breakdown missing exemption reason code
- ·Exemption reason text not provided
- ·ERP does not auto-populate exemption reason for reverse charge
- ·Standard exemption code used instead of reverse charge specific code
- ·Exemption reason field left empty
Seeing this in production? The API handles BR-AE-10 automatically. See the fix response →
Frequently Asked Questions
A reverse charge VAT breakdown must include either a VAT exemption reason code meaning "Reverse charge" or exemption text stating "Reverse charge" (or equivalent). This explains why no VAT is charged.
Invoice Navigator automatically fixes this issue by correcting the `cac:TaxSubtotal` element in your Invoice (BR-AE-10). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, BR-AE-10 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of BR-AE-10 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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