Reference · EN 16931

EN 16931's 2026 revision: what has changed

CEN has published a revised EN 16931-1. That is a real event, and it is not the event most coverage of it describes. The text exists. The legal obligation in Directive 2014/55/EU still points at the 2017 edition, and nobody outside CEN has published a citable account of what the revision actually changes.

CEN approved the revision of EN 16931-1 following a vote in which the participating Member State delegations supported it, the remainder abstained, and no delegation objected. The definitive text was released on 18 March 2026, and the European Commission announced the release on 30 March 2026. National standards bodies began publishing their own national adoptions of the revised standard in May 2026.

Where the 2026 edition sits in the sequence

EN 16931-1:2017 was issued by CEN on 28 June 2017, and the reference to it was published in the Official Journal on 17 October 2017. It was then amended by the A1 amendment of 2019 and corrected by the AC corrigendum of 2020. The 2026 edition supersedes EN 16931-1:2017+A1:2019 together with its 2020 corrigendum. It replaces the base text and both of the documents that had been layered on top of it. It is not just the base text on its own.

The rest of the family named alongside EN 16931-1 (CEN/TS 16931-2, the CEN/TS 16931-3 series, and the CEN/TR 16931-4, -5 and -6 documents) all remain at their 2017 designations. The revision touches the core semantic data model document specifically. It does not touch the wider set of technical specifications and reports published around it.

What the Commission says changed, and what nobody has sourced

The European Commission's own announcement says the revision "incorporates developments from the ViDA initiative, specifically introducing requirements to support eInvoicing for automated VAT reporting," and that CEN is developing guidance with practical examples for implementers. That is the extent of what the Commission itself has said about the content of the change.

Beyond that sentence, a number of specific changes are circulating (new fields, new business terms, changes to particular rule families) in vendor and industry coverage of the revision. None of it traces back to a CEN publication or another primary source we could find. This page will not repeat that list. Read anything more detailed than the Commission's own sentence above as a claim its author has not sourced, until CEN's own published materials say otherwise.

The text exists; the obligation doesn't point at it yet

Directive 2014/55/EU sets Member States' obligations by reference to the European standard's publication in the Official Journal. The published reference is what fixes which edition the legal obligation actually means. The existence of a CEN text does not. The reference in force is Commission Implementing Decision (EU) 2017/1870 of 16 October 2017, which named EN 16931-1:2017 and set 18 April 2019 as the final date for bringing the measures it required into force. That decision remains in force, unamended and unrepealed. No implementing decision publishing a reference to the 2026 edition has been adopted.

The Commission has said it "will soon publish the reference to the new standard, including a transition phase." No date for that publication and no length for the transition phase has been published. That is worth stating plainly rather than guessing at. There is no announced date and no announced transition period. It is not an unannounced-but-expected one.

CEN has formally withdrawn the 2017 version of the standard, and separately, the Commission states that the 2017 edition "will remain compliant during the migration period." Both of those are true at the same time — CEN no longer maintains the withdrawn text as its current standard, while the Official Journal reference that carries the legal obligation still names it, and will keep naming it until a new implementing decision is adopted.

What that means for validation today

CEN/TC 434's published validation artefacts (the rules an invoice is checked against) have no release for the 2026 edition. The current release implements EN 16931-1:2017 together with the A1 amendment and the AC corrigendum, and the most recent update to it is a set of eighteen bug fixes to those existing rules. It is not a new rule set. There is no branch, tag or release for a 2026 rule set. A document can be checked today against the 2017 rules. There is, as yet, nothing published to check it against for 2026. See what gets checked before an invoice is issued for how those 2017 artefacts are used, or check a document now with the free EN 16931 validator.

What doesn't change for you today

Nothing here changes what a document issued today needs to satisfy. The rule reference this site carries, and the free validator it offers, apply the currently published EN 16931 rules (the 2017 edition with its amendment and corrigendum) because that is what CEN's validation artefacts implement and what the Official Journal reference still names. EUInvoice does not support the 2026 revision, because there is not yet a published rule set to support it against. Separately, the Commission's cost-free licence for the standard, agreed with CEN on 18 December 2018, covers the 2017 edition of EN 16931-1 and CEN/TS 16931-2:2017, and end users are not to be charged an additional fee under it. On revision, that agreement "will be renewed under the terms to be agreed by CEN and the European Commission" — whether the 2026 text is available under the same free-of-charge terms has not been published, and we are not going to guess at it here.

What this does not cover

This article covers the publication history of the 2026 revision and the gap between that publication and the legal obligation Directive 2014/55/EU sets. It does not attempt a field-by-field account of what changed in the semantic data model, the business rules or the syntax bindings — see the section above for why. It also does not cover the ViDA digital reporting requirements themselves, which are a separate legal instrument on a separate timeline; see VAT in the Digital Age: the ViDA timeline. For the rule set this site currently checks documents against, see EN 16931 business rules, by rule code.