On 23 June 2026, HMRC confirmed what the industry had long expected: Peppol will be the core interoperability network for e-invoicing in the UK. The announcement, made as part of the government’s Tax Update 2026, gives businesses and software developers the clearest signal yet of the direction of travel ahead of the April 2029 mandate.
For finance leaders who have been waiting for certainty before beginning preparations, the waiting is now over. Here’s what the announcement means, what Peppol is, and what you should be doing next.
HMRC’s Tax Update 2026:
The government’s announcement on e-invoicing’s core interoperability network:
“The government has announced that the electronic procurement system Peppol will be the core interoperability network for e-invoicing in the UK. This will give software developers and taxpayers an indication of the direction of travel for our work towards the e-invoicing mandate in 2029, enabling them to begin planning their product development and rollout of e-invoicing. The government will continue to engage with stakeholders regarding the role of legacy systems which cannot interoperate in the future system.”
Two things stand out. First, this is a deliberate green light for businesses and software providers to begin implementation planning right now, and not to wait for the full Budget 2026 roadmap. Second, the reference to “legacy systems which cannot interoperate” signals that HMRC is aware of the challenge smaller or older ERP environments will face and is working through how to handle it.
What is Peppol?
Peppol (Pan-European Public Procurement Online) is a globally adopted, open network that allows businesses to exchange structured electronic invoices directly between financial systems, securely and in a standardised format. Rather than emailing a PDF, a business using Peppol sends machine-readable invoice data through a certified Access Point, which routes it to the recipient’s Access Point, where it arrives ready for automatic processing. No re-keying. No human interpretation. No manual handling.
Peppol is not new or experimental. It has been in use across Europe for over a decade, is already mandatory in countries including Belgium, Singapore, and Australia, and has been operating within the UK’s NHS supply chain since 2022. The UK is not adopting an unproven standard, it is joining a network that already works at scale, globally.
For a deeper overview of how Peppol works, including its four-corner model, access point structure, and the PINT UK format, see our full guide: An overview of Peppol.
Why this matters now
Before this announcement, finance leaders had reasonable grounds to pause preparations: the network had not been confirmed, and investing in Peppol-specific readiness carried technical risk. That uncertainty is now gone, which means:
- Software providers can now build and certify Peppol-compliant products with confidence, which means more solutions will be available to businesses well before 2029.
- Businesses can begin ERP readiness assessments, supplier conversations, and data quality work against a confirmed standard rather than waiting for further guidance.
- Organisations already trading internationally via Peppol with European customers or NHS contracts are effectively ahead of the curve, and can extend their existing infrastructure.
- The path to compliance is now clear enough to build a realistic implementation timeline, which matters given the resource crunch that will come as 2029 approaches.
What about legacy systems?
HMRC’s mention of legacy systems is a notable acknowledgement of a real-world challenge. Many mid-market organisations run ERP platforms or finance systems that pre-date structured data exchange, and retrofitting Peppol connectivity into older environments is not always straightforward. The government has signaled it will continue to engage with stakeholders on this, but businesses in this position should not treat that as a reason to wait. The direction of travel is confirmed; the question is only about transitional arrangements for those who need more time to get there. Start that conversation with your ERP vendor or implementation partner now.
What finance leaders should do next
The Peppol confirmation is a signal to move from watching to acting. Practical next steps:
- Audit your current AP and AR systems for Peppol readiness. Does your ERP or finance platform already support Peppol BIS Billing 3.0 or EN 16931 structured formats?
- Review your supplier master data. Structured e-invoicing requires accurate VAT numbers, company identifiers, and address data for every supplier. These types of gaps here are the most common blocker.
- Talk to your software provider about their Peppol roadmap: the confirmation of the network means vendors have no reason to delay product development, and you should be asking for timelines.
- Begin the internal conversation about change management . Technology is the easier part; aligning AP teams, AR teams, and suppliers around new workflows takes time.
- Watch for the full Budget 2026 roadmap later this year! This will confirm technical standards, scope details, and any phased rollout arrangements. That’s when you can move from planning to execution.
In Summary
HMRC’s Peppol confirmation is the clearest signal the UK e-invoicing programme has produced to date. The mandate is real, the network is confirmed, and the clock is running. Finance leaders who treat this as the starting gun will be the ones who arrive at April 2029 prepared, rather than scrambling.