EN 16931 Validator
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🇪🇪 Validate EN 16931 Invoices for Estonia
EN 16931B2G MandatoryPeppol
EN 16931 is required for B2G in Estonia. Estonia has mandatory B2G e-invoicing since July 2019 and introduced a "buyer's choice" model from July 2025 — buyers registered in the Commercial Register can demand e-invoices from any supplier, who must comply.
Quick Facts
Format
EN 16931
Standard
EN 16931
Mandate
B2G Only
Peppol
Connected
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
Estonia E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Jul 2019)
All public sector suppliers
Buyer's choice
Live (Jul 2025)
Registered buyers can demand e-invoices from any supplier
Full B2B mandate
2027
Expected — legislation being drafted
Required CIUSEN 16931 (default from Jul 2025); Estonian e-arve EVS 923 (legacy)
Routing identifierRegistrikood (registry code) in e-Business Register
PeppolYes — connected to Peppol for cross-border
Buyer's choice model. From July 2025, buyers registered as e-invoice recipients in the Estonian Commercial Register can legally demand e-invoices from any supplier. The default format is EN 16931 unless otherwise agreed. The legacy Estonian e-arve (EVS 923) format is still accepted but declining. Exchange occurs via private operators (Billberry, E-arveldaja, Finbite, Telema, Unifiedpost) with no central government platform.
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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