BR-CO-15

The invoice total with VAT (BT-112) must equal the total without VAT (BT-109) plus the total VAT amount (BT-110), exactly.

Severity: Error
Applies to: CII, UBL
Rule set: v2026-01-31

Official rule text

Invoice total amount with VAT (BT-112) = Invoice total amount without VAT (BT-109) + Invoice total VAT amount (BT-110).

Why it happens

BT-112 is often copied from the internal system while BT-109 and BT-110 are recalculated — a single cent of rounding difference between the two worlds triggers the error.

How to fix it

Always derive BT-112 as BT-109 + BT-110 from the two document values instead of writing an independently calculated gross amount. Use decimal arithmetic, never float.

NormAPI provides technical validation, not tax or legal advice.