What it means
An invoice whose VAT breakdown (BG-23) contains category O (not subject to VAT) must not contain any other VAT breakdown entries.
Why it matters
An invoice is either outside the VAT system or it is not. Mixing O with VAT categories makes the seller's VAT status unclear, so EN 16931 does not allow it and the invoice is rejected.
How to fix it
Split the invoice: put everything outside VAT on one invoice and the rest on another. If you are registered for VAT, the O items probably belong in another category, such as E (exempt), and can then stay on the same invoice.
The rule as published
An Invoice that contains a VAT breakdown group (BG-23) with a VAT category code (BT-118) "Not subject to VAT" shall not contain other VAT breakdown groups (BG-23). Business terms: BG-23, BT-118
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 WL | 1.0.9-2 |
| Factur-X 1.09 BASIC | 1.0.9-2 |
| Factur-X 1.09 EN 16931 | 1.0.9-2 |
| ZUGFeRD 2.5 BASIC WL | 2.5.2 |
| 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-O-11 still fails, and which other rules do.
Related rules
- BR-47 VAT category code is required
- BR-AE-01 Reverse-charge items need a matching VAT breakdown entry
- BR-AE-08 The AE taxable amount must match the lines
- BR-AE-09 VAT in category AE must be 0
- BR-AE-10 Reverse charge needs the reverse charge note
- BR-AF-01 IGIC on the invoice needs an IGIC entry in the VAT breakdown