What it means
The invoice states a sum of line net amounts (BT-106) that is not exactly the total of the individual line net amounts (BT-131).
Why it matters
The recipient adds up the lines and compares. A difference of even one cent means the totals cannot be trusted, and the invoice is rejected.
How to fix it
Check each line's net amount and add them up again. The usual cause is rounding: round each line to two decimals first, then add the rounded lines, and use that sum. Your invoicing software should do this when it creates the file.
The rule as published
Sum of Invoice line net amount (BT-106) = Σ Invoice line net amount (BT-131). Business terms: BT-106, BT-131
Where this rule applies
| Rule set | Version |
|---|---|
| EN 16931 (UBL) | 1.3.17 |
| EN 16931 (UBL credit note) | 1.3.17 |
| EN 16931 (CII) | 1.3.17 |
| XRechnung 3.0 (UBL) | 3.0.2 |
| XRechnung 3.0 (UBL credit note) | 3.0.2 |
| XRechnung 3.0 (CII) | 3.0.2 |
| Peppol BIS Billing 3.0 (invoice) | 2026.5 |
| Peppol BIS Billing 3.0 (credit note) | 2026.5 |
| Factur-X 1.09 BASIC | 1.0.9-2 |
| Factur-X 1.09 EN 16931 | 1.0.9-2 |
| ZUGFeRD 2.5 BASIC | 2.5.2 |
| ZUGFeRD 2.5 EN 16931 | 2.5.2 |
| SI-UBL 2.0 / NLCIUS (invoice) | 2.0.3.13 |
| SI-UBL 2.0 / NLCIUS (credit note) | 2.0.3.13 |
| NLCIUS (CII) | 1.0.3.13 |
| France CTC (UBL invoice) | 1.4.0-04 |
| France CTC (UBL credit note) | 1.4.0-04 |
| France CTC (CII) | 1.4.0-04 |
| CIUS-RO UBL Invoice 1.0.9 | 1.0.9 |
| CIUS-RO UBL Credit Note 1.0.9 | 1.0.9 |
Check your file
Drop your e-invoice to see whether BR-CO-10 still fails, and which other rules do.
Related rules
- BR-FXEXT-CO-10 The line total must equal the sum of the individual lines
- BR-12 Sum of line net amounts is required
- BR-24 Line net amount is required
- BR-AE-08 The AE taxable amount must match the lines
- BR-AF-08 IGIC taxable amount must match the lines, charges and discounts
- BR-AG-08 IPSI taxable amount must equal lines plus charges minus discounts