EN 16931

EN 16931 is the European standard that defines what information must be included in an electronic invoice and how it should be structured. Published in 2017, it ensures that e-invoices can be exchanged and processed automatically across all EU member states.

Developed by CEN (European Committee for Standardization) under EU Directive 2014/55/EU, EN 16931 was created to enable interoperability in public procurement. It has since become the foundation for most e-invoicing initiatives in Europe.

The standard defines a semantic data model with core elements (like invoice number, dates, parties, line items, and totals) and their relationships. It specifies two official syntax bindings: UBL 2.1 and UN/CEFACT Cross Industry Invoice (CII). Countries can create extensions (CIUS) for national requirements while maintaining compatibility.

Implementing EN 16931 requires mapping your invoice data to the semantic model, choosing a syntax (UBL or CII), validating against the standard's Schematron rules, and considering any national CIUS requirements. Most e-invoicing platforms and ERP systems now support EN 16931 natively.

EN 16931 has become the de facto standard for European e-invoicing. Compliance ensures your invoices can be processed by any EN 16931-compatible system, enabling seamless cross-border trade and reducing the need for multiple format conversions.

Related Regulations & Standards