UBL Validator
Validator
🇮🇪 Validate UBL Invoices for Ireland
UBLPlannedPeppol
UBL 2.1 is planned in Ireland. Ireland announced a phased B2B e-invoicing mandate in October 2025.
Quick Facts
Format
UBL 2.1
Standard
EN 16931
Mandate
Planned
Peppol
Connected
What We Validate
UBL 2.1 XML schema validation
EN 16931 business rules
Namespace and element structure
Code list validation
Party and address structure
Tax calculation rules
Invoice line consistency
Common UBL Errors
Ireland E-Invoicing Requirements
Phase
Status
Scope
B2G receiving
Live (Jun 2019)
Public sector must receive EN 16931 e-invoices
B2B Phase 1
Nov 2028
Large VAT-registered corporates (domestic B2B)
B2B Phase 2
Nov 2029
All VAT-registered businesses (cross-border EU B2B)
B2B Phase 3 (ViDA)
Jul 2030
Full ViDA compliance
Required CIUSEN 16931 (Peppol BIS 3.0 primary)
Routing identifierVAT registration number (via ROS)
PeppolYes — Office of Government Procurement is the Peppol Authority
Peppol-based, phased approach. Ireland is building entirely on Peppol infrastructure with no national portal. The Office of Government Procurement serves as the Peppol Authority. PDFs will no longer qualify as e-invoices under the mandate — your pipeline must produce EN 16931 structured data. The first phase targets large corporates in November 2028, giving a long runway for implementation.
FAQ
What is UBL 2.1?
UBL (Universal Business Language) 2.1 is an open XML standard for business documents developed by OASIS. It defines schemas for invoices, orders, and 60+ other document types.
Is UBL the same as Peppol?
No. UBL is the document format; Peppol is the network. Peppol BIS Billing is built on UBL 2.1 with additional business rules.
Should I use UBL or CII for EN 16931?
Both are valid syntaxes for EN 16931. UBL is more common internationally (Peppol uses it), while CII is used in hybrid formats like ZUGFeRD.
What are cbc: and cac: prefixes?
These are UBL namespace prefixes. cbc: (Common Basic Components) contains simple values, cac: (Common Aggregate Components) contains complex structures.
Which standards are built on UBL?
Peppol BIS Billing 3.0, XRechnung (UBL variant), A-NZ PEPPOL (Australia/New Zealand), and Singapore InvoiceNow all use UBL 2.1 as their base syntax. Our validator checks generic UBL compliance—use format-specific validators for additional business rules.
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