BR-DEC-15:Accounting currency VAT amount: max 2 decimals
When a tax/accounting currency is specified (BT-6), the Invoice total VAT amount in accounting currency (BT-111) must have a maximum of 2 decimal places.
Engine Classification
Round invoice total VAT in accounting currency to 2 decimal places per EN16931
Confidence: 95% · Applied automatically in pipeline
What is BR-DEC-15?
BR-DEC-15 is a fatal validation rule defined in the EN 16931 specification. It validates the TaxAmount element 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[2]/cbc:TaxAmount
Why This Error Matters
Invoice will be rejected by validation. Accounting currency amounts must have proper precision for multi-currency reporting.
BR-DEC-15 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-DEC-15
- ·Specification: EN 16931
How to Fix It
Identify accounting currency TaxTotal
Locate the second cac:TaxTotal element (BT-111) which contains the VAT amount in accounting currency
Check decimal places
Count the decimal places in cbc:TaxAmount
Round if needed
If more than 2 decimals, round using standard rounding (half up)
Before / After
<cac:LegalMonetaryTotal> <cbc:PrepaidAmount>999.99</cbc:PrepaidAmount> <!-- Does not match expected calculation --> </cac:LegalMonetaryTotal>
<cac:LegalMonetaryTotal> <cbc:PrepaidAmount>100.00</cbc:PrepaidAmount> <!-- Matches expected calculation --> </cac:LegalMonetaryTotal>
Technical Reference
//cac:TaxTotal[2]/cbc:TaxAmountCommon Causes
- ·Currency conversion introduced extra decimals
- ·Exchange rate calculation produced excess precision
- ·Accounting currency VAT not rounded after conversion
- ·ERP exports converted amounts with full precision
- ·Rounding applied inconsistently between currencies
Seeing this in production? The API handles BR-DEC-15 automatically. See the fix response →
Frequently Asked Questions
BR-DEC-15 occurs when the Invoice total VAT amount in accounting currency (BT-111) has more than 2 decimal places. This typically happens during currency conversion when the exchange rate calculation produces excess precision.
Round the accounting currency VAT amount in the second TaxTotal element to 2 decimal places. Invoice Navigator's automatic Fixer tool can correct this instantly.
Yes, BR-DEC-15 is a critical error that will cause invoice rejection. Multi-currency invoices must have properly rounded amounts in both currencies.
Yes, BR-DEC-15 can be automatically fixed using Invoice Navigator's Fixer tool. The tool will round the accounting currency VAT amount to 2 decimal places.
See Also
Related Errors
Last updated: 27 February 2026
Handle BR-DEC-15 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.