What it means
Every invoice must contain the amount due for payment (BT-115). It is what the buyer still has to pay: the total with VAT minus anything already paid.
Why it matters
EN 16931, the European e-invoicing standard, makes this field mandatory. Without it the recipient's system rejects the invoice before anyone reads it, and public bodies and Peppol access points refuse it outright.
How to fix it
Let your invoicing software calculate the amount due and export again. If you build the XML yourself, add cbc:PayableAmount (UBL) or ram:DuePayableAmount (CII), even when it is zero because the invoice is already paid.
The rule as published
An Invoice shall have the Amount due for payment (BT-115). Business terms: BT-115
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 MINIMUM | 1.0.9-2 |
| Factur-X 1.09 BASIC WL | 1.0.9-2 |
| Factur-X 1.09 BASIC | 1.0.9-2 |
| Factur-X 1.09 EN 16931 | 1.0.9-2 |
| Factur-X 1.09 EXTENDED | 1.0.9-2 |
| ZUGFeRD 2.5 MINIMUM | 2.5.2 |
| ZUGFeRD 2.5 BASIC WL | 2.5.2 |
| ZUGFeRD 2.5 BASIC | 2.5.2 |
| ZUGFeRD 2.5 EN 16931 | 2.5.2 |
| ZUGFeRD 2.5 EXTENDED | 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-15 still fails, and which other rules do.
Related rules
- BR-CO-16 Amount due must equal total with VAT minus paid plus rounding
- BR-CO-25 A positive amount due needs a due date or payment terms
- BR-DE-18 Early payment discount terms must follow the XRechnung format
- BR-DEC-18 Amount due for payment: at most two decimals
- BR-DEC-RO-18 Amount due for payment: two decimals at most
- BR-DEX-09 Amount due must add up, including third party payments