Validator

🇸🇰 Validate EN 16931 Invoices for Slovakia

EN 16931PlannedPeppol

EN 16931 is planned in Slovakia. Slovakia approved mandatory B2B e-invoicing in December 2025, effective January 1, 2027.

Quick Facts

Format

EN 16931

Standard

EN 16931

Mandate

Planned

Peppol

Connected

Portal

IS EFA ↗

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

#1BR-CO-10Sum of VAT category amounts incorrectFix guide

#2BR-S-08Standard rate VAT amount missingFix guide

#3BR-E-01Exempt reason requiredFix guide

#4BR-CO-11Line amount calculation errorFix guide

#5BR-CO-13Invoice total mismatchFix guide

Slovakia E-Invoicing Requirements

Phase

Status

Scope

B2G

Live (Apr 2023)

Public procurement >€5,000

B2B mandatory

Jan 2027

All VAT-registered businesses (incl. freelancers)

Cross-border

Jul 2030

Intra-EU B2B (ViDA alignment)

Validation engineFinancial Administration (5th corner in Peppol model)

Required CIUSEN 16931 (UBL 2.1, CII D16B, Peppol BIS 3.0)

Government portalIS EFA (B2G platform, transitioning to Peppol by 2027)

Routing identifierIČ DPH (VAT ID) mapped to Peppol Participant ID

PeppolMandatory — Financial Administration becomes Slovak Peppol Authority

Slovakia's Peppol 5-corner model adds a reporting layer that Peppol-only integrations don't have.

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.

Validate your Slovakia EN 16931 invoices

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