Rules / PEPPOL-EN16931-R121 · Markdown
PEPPOL-EN16931-R121
PEPPOL BIS Billing 3.0 layer: peppol
Checked against Peppol BIS Billing 3.0 2026.5
What does PEPPOL-EN16931-R121 mean? Base quantity MUST be a positive number above zero.
Why did my invoice fail PEPPOL-EN16931-R121?
The item price base quantity (BT-149) must be a positive number strictly greater than zero, because it is the denominator that relates the net price (BT-146) to the invoiced quantity. A zero or negative base quantity would make the per-unit price calculation invalid or a division by zero.
Official rule text
Base quantity MUST be a positive number above zero.
Common causes
- BaseQuantity is set to 0, often from an uninitialised or defaulted field.
- A negative BaseQuantity was produced by a mapping or sign error.
- The element was emitted empty and interpreted as zero by the validator.
How do I fix it?
Provide a positive base quantity: <cbc:BaseQuantity unitCode="C62">1</cbc:BaseQuantity> (never 0 or negative).
Related rules
PEPPOL-EN16931-R001 · PEPPOL-EN16931-R002 · PEPPOL-EN16931-R003 · PEPPOL-EN16931-R004 · PEPPOL-EN16931-R005 · PEPPOL-EN16931-R007 · PEPPOL-EN16931-R008 · PEPPOL-EN16931-R010
Check your invoice against this rule
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