Reference
Markdown exportBR-CO-10 Sum of invoice line net amounts (BT-106) must equal the sum of all line net amounts (BT-131)
The document-level Sum of invoice line net amounts (BT-106) must equal the arithmetic sum of every Invoice line net amount (BT-131).
Problem Description
ERROR
EN 16931 calculation and consistency rule (BR-CO)
Interactive pipeline
Where BR-CO-10 is checked
Click a stage to see what it checks, or type a rule ID to light up the stage that reports it.
BR-CO-10 EN 16931 calculation rule
Reported in stage 2: EN 16931 rules.
Level error: the report recommends rejecting the invoice.
Stage 2 · What it checks
EN 16931 rules
- The core business terms are present (BR-01 to BR-65).
- Totals add up and related fields agree (BR-CO); codes and decimals are valid (BR-CL, BR-DEC).
- Each VAT category is consistent: S, Z, E, AE, K, G, O, L, M (BR-S, BR-Z, BR-AE, BR-IC …).
Example codes
Typical fix
Recalculate totals and VAT from the line data, and correct the VAT category in the source data.
Context and Significance
The validator adds up all BT-131 values and compares the result with BT-106 exactly, without tolerance. A difference usually comes from rounding: the ERP calculates the total from unrounded quantity × price values, while each line amount in the XML is rounded to two decimals. Another cause is a line that was deleted or added after the totals were calculated.
Solution
Round each invoice line net amount (BT-131) to two decimals first, then write their exact sum into BT-106 in the totals block (UBL: cac:LegalMonetaryTotal/cbc:LineExtensionAmount; CII: ram:SpecifiedTradeSettlementHeaderMonetarySummation/ram:LineTotalAmount).
Quick actions
Valid Examples
- Lines 100.00 + 50.00 + 25.00 yield BT-106 = 175.00
- Single line of 99.99 yields BT-106 = 99.99
Invalid Examples
- Three lines of 10.005 are each rounded to 10.01 (sum 30.03), but BT-106 = 30.02 was calculated from the unrounded sum 30.015
- BT-106 left at 0.00 while lines exist