Validation rules

BR-DEC-20 — EN 16931 rule

A VAT category tax amount (BT-117) uses more than 2 decimal places — EN 16931 allows at most 2.

Rule: BR-DEC-20 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-117 — VAT category tax amount
Field in your JSON: invoice.lines
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

normbill computes every VAT breakdown itself and formats the tax amount with exactly 2 decimals.

How to fix it

Round the cbc:TaxAmount of the VAT breakdown (cac:TaxSubtotal) to 2 decimals.

BR-DEC-20 auf Deutsch — was bedeutet der Fehler?

Der Steuerbetrag einer Umsatzsteuerkategorie (BT-117) hat mehr als 2 Nachkommastellen. EN 16931 erlaubt höchstens 2 Dezimalstellen — der KoSIT-Validator lehnt die Rechnung ab.

So beheben Sie den Fehler

Runden Sie das cbc:TaxAmount des betroffenen cac:TaxSubtotal auf 2 Nachkommastellen. normbill berechnet jede Steueraufschlüsselung selbst und formatiert sie mit exakt 2 Stellen.

Related rules

BR-46 — A VAT breakdown (BG-23) has no tax amount (BT-117).
BR-CO-17 — A VAT breakdown's tax amount (BT-117) does not equal its taxable amount (BT-116) multiplied by the category…
BR-AE-09 — The tax amount (BT-117) of the reverse-charge (AE) breakdown must be 0.
BR-AF-09 — The tax amount (BT-117) of an IGIC (L) breakdown must equal its taxable amount (BT-116) multiplied by its…
BR-AG-09 — The tax amount (BT-117) of an IPSI (M) breakdown must equal its taxable amount (BT-116) multiplied by its…
BR-E-09 — The tax amount (BT-117) of the exempt (E) breakdown must be 0.

Official sources

Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.

Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.