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PEPPOL-EN16931-R120:Line amount calculation error

Line amount must equal quantity × price ± allowances/charges.

Fix this in your source system

MANUAL

Line amount calculations (quantity x price) must match your order/delivery documents. Discrepancies may indicate pricing or quantity errors.

See the step-by-step instructions below to fix this error manually.

Why This Error Matters

Invoice will be rejected by PEPPOL validation. Line calculations must be mathematically consistent.

How to Fix It

1

Calculate

Quantity × Price / BaseQuantity

2

Adjust

Add charges, subtract allowances

3

Update

Set LineExtensionAmount to result

Technical Details

XPath: /Invoice/cac:InvoiceLine/cbc:LineExtensionAmount

Common Causes

  • Line net amount does not match calculation formula
  • Rounding differences in multiplication
  • Base quantity not accounted for in calculation
  • Allowances or charges changed without updating net
  • Manual override of line net amount

Frequently Asked Questions

Line amount must equal quantity × price ± allowances/charges.
Recalculate: Quantity × (Price / BaseQuantity) ± adjustments. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, PEPPOL-EN16931-R120 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of PEPPOL-EN16931-R120 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including line amount calculation error.

Related Errors

BR-CO-18

Line extension amount calculation error

Last updated: 18 January 2026

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