Germany: XRechnung 4.0 technical pre-release implements EN 16931-1:2026
A technical pre-release of XRechnung 4.0 has been published, implementing the revised EN 16931-1:2026 semantic model. It is explicitly not for production use, and the full technical bundle is expected in spring 2027. The timing is awkward but navigable: the German issuing obligation starts 1 January 2027 for businesses above EUR 800,000 turnover, so most teams will go live on XRechnung 3.x and migrate to 4.0 afterwards rather than waiting. The practical step now is to confirm your ERP or service provider has a stated 4.0 migration path, because a semantic-model revision touches field-level mappings rather than just the schema version.