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PEPPOL-EN16931-R051 - All amounts must carry the invoice currency

Every currencyID attribute in the document must repeat the invoice currency code (BT-5). The only exception is the total VAT amount expressed in the accounting currency (BT-111), which by definition uses another currency.

PEPPOL-EN16931-R051 - All amounts must carry the invoice currency

Every currencyID attribute in the document must repeat the invoice currency code (BT-5). The only exception is the total VAT amount expressed in the accounting currency (BT-111), which by definition uses another currency. This is a Peppol BIS Billing 3.0 rule. It applies on top of the EN 16931 core standard, on invoices exchanged over the Peppol network.

CalculationsPeppol BIS 3.0BT-5 Error
This is a Peppol BIS Billing 3.0 rule. It applies on top of the EN 16931 core standard, on invoices exchanged over the Peppol network.

What this rule checks

Every currencyID attribute in the document must repeat the invoice currency code (BT-5). The only exception is the total VAT amount expressed in the accounting currency (BT-111), which by definition uses another currency.

How to fix it

Align the currencyID attributes of the amount elements with cbc:DocumentCurrencyCode, leaving only the cbc:TaxAmount in the accounting currency untouched.

Validate against this rule

This rule is part of EN 16931. Check your invoice with the validator that matches your format:

UBL / PeppolXRechnungFactur-X / ZUGFeRD

Related rules

BR-CO-10Sum of line net amounts must equal the line totalBR-CO-13Total without VAT must reconcile lines, allowances and chargesBR-CO-15Total with VAT must equal total without VAT plus VATBR-CO-16Amount due must equal total with VAT minus prepaidBR-CO-11Sum of document-level allowancesBR-CO-12Sum of document-level charges

Source: OpenPeppol BIS Billing 3.0 · Last verified: 2026-07-10

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