BR-DEC-09:Sum of line amounts: max 2 decimals
Fix: Invoice Navigator automatically fixes this issue by correcting the `cbc:LineExtensionAmount` element in your Invoice (BR-DEC-09). Upload your invoice to fix this automatically.
Sum of Invoice line net amount (BT-106) allows max 2 decimal places. This is the LineExtensionAmount in LegalMonetaryTotal.
Engine Classification
Round sum of invoice line net amounts to 2 decimal places per EN16931
Confidence: 95% · Applied automatically in pipeline
What is BR-DEC-09?
BR-DEC-09 is a fatal validation rule defined in the EN 16931 specification. It validates the LineExtensionAmount element 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:LegalMonetaryTotal/cbc:LineExtensionAmount
Why This Error Matters
Invoice will be rejected by validation. Line totals must match expected precision for calculation verification.
BR-DEC-09 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-DEC-09
- ·Specification: EN 16931
How to Fix It
Locate total
Find LegalMonetaryTotal/LineExtensionAmount
Round amount
Round to 2 decimal places, ensure it matches sum of line amounts
Before / After
<Invoice> <cbc:LineExtensionAmount>999.99</cbc:LineExtensionAmount> <!-- Does not match expected calculation --> </Invoice>
<Invoice> <cbc:LineExtensionAmount>100.00</cbc:LineExtensionAmount> <!-- Matches expected calculation --> </Invoice>
Technical Reference
//cac:LegalMonetaryTotal/cbc:LineExtensionAmountCommon Causes
- ·Summing lines with different rounding produced extra decimals
- ·Individual line amounts not properly rounded before summing
- ·ERP calculates sum with full precision
- ·Rounding applied after sum instead of on each line
- ·Currency conversion affected sum precision
Seeing this in production? The API handles BR-DEC-09 automatically. See the fix response →
Frequently Asked Questions
Invoice line net amount (BT-131) allows max 2 decimal places.
Round line amount to 2 decimal places. Invoice Navigator can help identify and fix this issue.
Yes, BR-DEC-09 is a critical error that must be fixed.
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Last updated: 27 February 2026
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