How do I fix BR-AE-10?

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.

Is BR-AE-10 a critical error?

Yes, BR-AE-10 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can BR-AE-10 be automatically fixed?

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.

errorEN 16931

`BR-AE-10`:Reverse charge VAT breakdown must include exemption reason

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.

Severity

Fatal

Rule set

EN 16931

Country

All EU

Fix type

AUTO-FIX

Confidence

90%

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 non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.

Target path: //cac:TaxTotal/cac:TaxSubtotal[cac:TaxCategory/cbc:ID='AE']/cac:TaxCategory/cbc:TaxExemptionReasonCode

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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. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.

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

Failing XML

<cac:TaxTotal>
  <!-- cac:TaxSubtotal is missing -->
</cac:TaxTotal>

Corrected XML

<cac:TaxTotal>
  <cac:TaxSubtotal>valid-value</cac:TaxSubtotal>
</cac:TaxTotal>

Technical Reference

XPath//cac:TaxTotal/cac:TaxSubtotal[cac:TaxCategory/cbc:ID='AE']/cac:TaxCategory/cbc:TaxExemptionReasonCode

SpecEN 16931

Operationset_default

StrategyAdd VAT exemption reason code for reverse charge breakdown per EN16931 BR-AE-10

Common 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 →

Related Errors

BR-45

Each VAT breakdown (BG-23) shall have a VAT category taxable amount (BT-116).

BR-48

Document allowance tax category required

BR-AE-09

Reverse charge VAT breakdown tax amount must be zero

Last updated: 27 February 2026

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Handle BR-AE-10 Automatically in Your Pipeline

The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.

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BR-AE-10:Reverse charge VAT breakdown must include exemption reason