PEPPOL-EN16931-R041: Allowance or charge percentage given without base amount

StandardPeppol BIS Billing 3.0 (OpenPeppol)SeverityError: the invoice is rejectedSyntaxUBL, CIIApplies toInvoices and credit notes sent over the Peppol network (UBL) and, because XRechnung embeds the Peppol rule set, every XRechnung as well.

Official rule text

[PEPPOL-EN16931-R041] Allowance/charge base amount MUST be provided when allowance/charge percentage is provided.

Why this error occurs

A percentage on an allowance or charge is only meaningful together with the base it applies to, so Peppol requires the base amount whenever a percentage is present. The rule flags cac:AllowanceCharge with cbc:MultiplierFactorNumeric but no cbc:BaseAmount at document and line level (UBL), or ram:SpecifiedTradeAllowanceCharge with ram:CalculationPercent but no ram:BasisAmount (CII). It typically comes from software that exports the discount percentage from the pricing condition but only the resulting amount, not the base.

How to fix it

Either add cbc:BaseAmount (UBL) / ram:BasisAmount (CII) with the amount the percentage was applied to, making sure Amount = BaseAmount x percentage / 100 (PEPPOL-EN16931-R040), or remove cbc:MultiplierFactorNumeric / ram:CalculationPercent and keep only the amount. The percentage can still be mentioned in cbc:AllowanceChargeReason text if you want it visible. Apply the same fix to line-level allowances inside cac:InvoiceLine.

Example (valid)

<cac:AllowanceCharge>
  <cbc:ChargeIndicator>false</cbc:ChargeIndicator>
  <cbc:AllowanceChargeReason>Discount</cbc:AllowanceChargeReason>
  <cbc:MultiplierFactorNumeric>5</cbc:MultiplierFactorNumeric>
  <cbc:Amount currencyID="EUR">12.50</cbc:Amount>
  <cbc:BaseAmount currencyID="EUR">250.00</cbc:BaseAmount>
  <cac:TaxCategory><cbc:ID>S</cbc:ID><cbc:Percent>19</cbc:Percent><cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme></cac:TaxCategory>
</cac:AllowanceCharge>

What the validator checks

Checked element (context):

UBL

ubl-invoice:Invoice/cac:AllowanceCharge[cbc:MultiplierFactorNumeric and not(cbc:BaseAmount)] | ubl-invoice:Invoice/cac:InvoiceLine/cac:AllowanceCharge[cbc:MultiplierFactorNumeric and not(cbc:BaseAmount)] | ubl-creditnote:CreditNote/cac:AllowanceCharge[cbc:MultiplierFactorNumeric and not(cbc:BaseAmount)] | ubl-creditnote:CreditNote/cac:CreditNoteLine/cac:AllowanceCharge[cbc:MultiplierFactorNumeric and not(cbc:BaseAmount)]

Test (XPath):

false()

CII

ram:SpecifiedTradeAllowanceCharge[ram:CalculationPercent and not(ram:BasisAmount)]

Test (XPath):

false()

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Same check via API:

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Related rules

PEPPOL-EN16931-R001 Business process identifier (BT-23) is missing
PEPPOL-EN16931-R002 No more than one note is allowed on document level, unless both the buyer and seller…
PEPPOL-EN16931-R003 Neither buyer reference nor purchase order reference given
PEPPOL-EN16931-R004 Specification identifier is not the Peppol BIS Billing 3.0 identifier
PEPPOL-EN16931-R005 VAT accounting currency equals the invoice currency
PEPPOL-EN16931-R006 Only one invoiced object is allowed on document level
PEPPOL-EN16931-R007 Business process identifier has the wrong format
PEPPOL-EN16931-R008 Document contains empty elements

Frequently asked questions

What does PEPPOL-EN16931-R041 mean?

PEPPOL-EN16931-R041 is a peppol bis billing 3.0 rule: Allowance/charge base amount MUST be provided when allowance/charge percentage is provided.

Will my invoice be rejected because of PEPPOL-EN16931-R041?

Yes. PEPPOL-EN16931-R041 is flagged "fatal"; validators (KoSIT, Peppol access points, the German ZRE/OZG-RE portals) reject the invoice until it is fixed.

Which formats does PEPPOL-EN16931-R041 apply to?

Invoices and credit notes sent over the Peppol network (UBL) and, because XRechnung embeds the Peppol rule set, every XRechnung as well. Syntax: UBL and CII.

Source: Peppol BIS Billing 3.0.20 (November 2025). Catalogue generated from the official schematron on 2026-10-14.