EN 16931 Validator
Validator
🇵🇹 Validate EN 16931 Invoices for Portugal
EN 16931B2G MandatoryPeppol
EN 16931 is required for B2G in Portugal. Portugal combines mandatory B2G e-invoicing with extensive reporting requirements for all taxpayers.
Quick Facts
What We Validate
EN 16931 semantic model compliance
Business rule validation (BR-xx rules)
VAT category rules (BR-S, BR-Z, BR-E, etc.)
Calculation rules (BR-CO-xx)
Code list validation
Party identification
Cross-border requirements
Common EN 16931 Errors
Portugal E-Invoicing Requirements
Phase
Status
Scope
SAF-T reporting
Live (Jan 2013)
All taxpayers (monthly)
B2G
Live (Jan 2025)
All suppliers to public entities
ATCUD + QR codes
Live (Jan 2023)
All invoices
QES for PDFs
Jan 2027
All PDF invoices
Required CIUSCIUS-PT (UBL 2.1 or CEFACT CII)
Government portalFE-AP (Fatura Eletrónica na Administração Pública)
Routing identifierNIF (tax identification number)
PeppolYes — Peppol accepted for B2G delivery
SAF-T and ATCUD. Portugal's primary compliance mechanism is the monthly SAF-T billing submission (due by the 5th of the following month) plus the ATCUD unique document code on every invoice. Your ERP integration must generate ATCUD codes from AT-certified software and include QR codes on paper/PDF output. This applies regardless of whether the invoice is electronic or paper.
FAQ
What is EN 16931?
EN 16931 is the European standard for electronic invoicing. It defines a semantic data model and business rules that all EU e-invoices must follow, regardless of syntax (UBL or CII).
Is EN 16931 mandatory?
For B2G invoices to EU public sector, yes. For B2B, it depends on the country. Under ViDA (VAT in the Digital Age), EN 16931 compliance will become essential across the EU.
What syntax should I use for EN 16931?
EN 16931 supports two syntaxes: UBL 2.1 and UN/CEFACT CII. UBL is more common for Peppol; CII is used in ZUGFeRD/Factur-X. Both express the same data.
What's a CIUS?
A CIUS (Core Invoice Usage Specification) is a national adaptation of EN 16931. Examples: XRechnung (Germany), Peppol BIS (international), CIUS-RO (Romania).
How do I prepare for ViDA?
Start by ensuring your invoices comply with EN 16931. Our validator checks all the business rules that will be required under the ViDA e-invoicing mandate.
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