Following the initial announcement in the Autumn Budget 2025 [↗︎] setting a nationwide B2B mandate for April 1, 2029, HM Revenue & Customs (HMRC), UK’s tax authority, has provided formal administrative continuity in its latest policy package.
The publication of the Tax Update 2026: simplification, modernisation and fairness [↗︎] on June 23, 2026, marks an important official milestone.
While the selection of the network was already widely anticipated, this package, officially designating the Peppol network as the core interoperability network for e-invoicing, formalizes the model to be implemented for the UK e-invoicing mandate. It will provide much-needed guidance and will enable businesses and service providers to begin preparing for the upcoming changes
To implement e-invoicing mandate, the government will notably “continue to engage with stakeholders regarding the role of legacy systems which cannot interoperate in the future system”.
Next steps will focus on ongoing discussions around invoice formats, including alignment with Peppol PINT and possible development of a UK-specific Peppol PINT UK. Formal publications and more detailed specifications are still in progress and are unlikely before 2027, potentially mid to late 2027.
