The European standards organization (CEN) has approved updates to the EN 16931-1 semantic standard to align with upcoming legislative changes, including the VAT in the Digital Age (ViDA).
Background
CEN TC 434 was established in 2014 to create a common standard for electronic invoicing. The European standard is composed of six parts, including the semantic data model EN 16931-1:2017. The European Standard establishes a semantic data model of the core elements of an electronic invoice. The semantic model includes only the essential information elements that an electronic invoice needs to ensure legal (including fiscal) compliance and to enable interoperability for cross-border, cross sector and for domestic trade.
Challenges
The original EN 16931 development was driven by European Directive 2014/55/EU, which mandated e-invoicing for business-to-government (B2G) transactions. As a result, the standard lacked provisions for Continuous Transaction Controls (CTC) and comprehensive Business-to-Business (B2B) applications - gaps that would create challenges when ViDA becomes effective.
Changes
The European standards organization (CEN) approved the revision of EN 16931-1 semantic standard to align with upcoming legislative changes, including ViDA.
This reform includes the following changes:
- New core semantic data model for B2B transactions
- Syntax bindings for CII and UBL, with new rules on mandatory and optional fields
- Extension methodology (CIUS and extensions) including industry-specific
Timelines
Updates to EN 16931-1 reform can be expected according to the timelines below:
- 23 October 2025: Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
- 26 November 2026: Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
- 28 February 2026: Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
- 31 May 2026: Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
- 31 May 2026: Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
More information will be shared once the updated EN 16931 is published.