BR-AF-08:For each IGIC VAT rate, the taxable amount must equal the sum of line net...
Fix: Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per EN 16931 (BR-AF-08).
For each IGIC VAT rate, the taxable amount must equal the sum of line net amounts plus charges minus allowances where all use IGIC with that same rate. This is a calculation consistency check.
Engine Classification
Financial or legal field · Modification blocked by policy
Reason: VAT taxable amount calculation requires verification against source documents. Incorrect amounts could result in tax filing errors and penalties.
What is BR-AF-08?
BR-AF-08 is a fatal validation rule defined in the EN 16931 specification.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Why This Error Matters
Invoice will be rejected by validation. IGIC VAT breakdown must mathematically reconcile with line items.
BR-AF-08 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-AF-08
- ·Specification: EN 16931
How to Fix It
Identify the issue in your invoice
For each IGIC VAT rate, the taxable amount must equal the sum of line net amounts plus charges minus allowances where all use IGIC with that same rate. This is a calculation consistency check.
Correct this in your invoicing software
Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per EN 16931 (BR-AF-08).
Re-export and validate
Generate a new invoice export from your accounting system and re-validate to confirm BR-AF-08 is resolved.
Before / After
<Invoice> <!-- Issue: For each IGIC rate, the VAT category taxable amount must equ --> </Invoice>
<Invoice> <!-- Issue resolved per EN 16931 --> </Invoice>
Technical Reference
Common Causes
- ·Taxable amount does not match sum of IGIC components at same rate
- ·Components have different rates but grouped incorrectly
- ·Manual taxable amount does not match calculated sum
- ·ERP calculation error in IGIC VAT breakdown
- ·Rounding differences between components and total
Seeing this in production? The API handles BR-AF-08 automatically. See the fix response →
Frequently Asked Questions
For each IGIC VAT rate, the taxable amount must equal the sum of line net amounts plus charges minus allowances where all use IGIC with that same rate. This is a calculation consistency check.
Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per EN 16931 (BR-AF-08). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, BR-AF-08 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of BR-AF-08 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
Related Content
Last updated: 14 April 2026
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