Validation rules

BR-DEC-23

An invoice line net amount (BT-131) uses more than 2 decimal places — EN 16931 allows at most 2.

Rule
BR-DEC-23official EN 16931 / XRechnung rule
Severity
error
Business term
BT-131 — Line net 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 each line net (qty × unit_price ± line allowances/charges) and rounds it to 2 decimals before serializing.

How to fix it

Round the line's cbc:LineExtensionAmount to 2 decimals. Only the item net price (BT-146) may carry more decimals.

BR-DEC-23 auf Deutsch — was bedeutet der Fehler?

Der Nettobetrag einer Rechnungsposition (BT-131) hat mehr als 2 Nachkommastellen. EN 16931 erlaubt höchstens 2 Dezimalstellen — nur der Netto-Einzelpreis (BT-146) darf mehr tragen. Der KoSIT-Validator lehnt die Rechnung ab.

So beheben Sie den Fehler

Runden Sie das cbc:LineExtensionAmount der Position auf 2 Nachkommastellen. normbill berechnet jeden Positionsnettobetrag (qty × unit_price ± Positionsnachlässe/-zuschläge) und rundet ihn vor der Serialisierung auf 2 Stellen.

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.

Spotted something?

Bug, missing feature, wrong validation result — tell us. The page you're on is attached automatically; email optional.