E-Invoice ValidatorPEPPOL-EN16931-R120
MistakeUBLCII
What that means
The item net amount does not correspond to quantity × unit price (plus surcharges/discounts for the item).
Here's how to fix it
Check the position calculation - it is often due to a price base quantity (BT-149) or decimal places.
Official rules text
Invoice line net amount MUST equal (Invoiced quantity * (Item net price/item price base quantity) + Sum of invoice line charge amount - sum of invoice line allowance amount
Rules and regulations
- Peppol BIS Billing 3.0 (UBL) (v3.0.20)
- Peppol BIS Billing 3.0 (CII) (v3.0.20)
Related rules
- PEPPOL-EN16931-R101 Element Document reference can only be used for Invoice line object
- PEPPOL-EN16931-R110 Start date of line period MUST be within invoice period.
- PEPPOL-EN16931-R111 End date of line period MUST be within invoice period.
- PEPPOL-EN16931-R121 Base quantity MUST be a positive number above zero.
- PEPPOL-EN16931-R130 Unit code of price base quantity MUST be same as invoiced quantity.
Does this error appear in your invoice?
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Official rule sets up to date: EN 16931 1.3.17 · Peppol BIS 3.0.20 · XRechnung 3.0.2 (KoSIT 2.6.0). Last checked against the sources on 12.10.2026.