UK eInvoicing mandate from April 2029: who is affected and what you need to do

From 1 April 2029, eInvoicing becomes compulsory for VAT compliance in the UK. The government will introduce legislation in Finance Bill 2026-27 to provide the enabling powers necessary for implementation.

Who must issue and receive eInvoices

All VAT-registered persons in the UK must issue and receive VAT invoices as eInvoices from 1 April 2029. This includes non-established taxable entities registered for UK VAT and public bodies. 

The obligation applies wherever a VAT invoice is required today: primarily for taxable supplies between VAT-registered persons in the UK. B2C sales and cross-border transactions fall outside the mandate.

Peppol as the interoperability standard

The UK has selected Peppol as the core interoperability framework. HMRC will become the UK Peppol Authority. Businesses will exchange eInvoices through certified Access Points using a four corner interoperability model. Further policy and technical work will determine how this operates in practice.

Key implementation dates

• Spring 2027: Consultation on the technical framework and introduction of enabling legislation
• October 2027 to April 2028: Publication of detailed requirements, including scope, exemptions, technical standards, business identifiers for Peppol registration, and software provider obligations
• Summer 2028: Readiness testing with software providers
• Winter 2028: Governance, onboarding, and operational infrastructure become fully available 
• 1 April 2029: Mandatory eInvoicing becomes effective

The government has also opened a consultation on the potential future use of structured information generated through eInvoicing for digital reporting. This consultation closes on 20 January 2027.

What should your organization do now

✔️ Identify which UK VAT registrations and invoice flows may fall within scope.
✔️ Review your ERP system, invoice data and existing eInvoicing capabilities.
✔️ Plan for the publication of final technical requirements in 2027 to 2028.

Let's get you ready

If your organization is VAT-registered in the UK, our specialists can help you assess the impact of this transition and prepare your systems for the April 2029 deadline.

Source: UK government eInvoicing implementation roadmap (Budget 2025)