The same deadline lands differently on every desk
What the CFO needs to know
What the Head of AP needs to know
used to be: we process 98% of Arco's orders and invoices in under 70 seconds.
Now
Consultation complete
HMRC and the Department for Business and Trade ran a 12-week consultation from February to May 2025
October 2026
Autumn budget
On 28 October 2026, HMRC is due to publish its implementation roadmap
April 2029
Mandate live
E-invoicing becomes mandatory for all UK B2B finance departments

We automate e-invoicing as an accredited Peppol Access Point, built to flex as mandate rules change, while cutting costs and protecting your margins.
Get the terms straight and every conversation gets shorter, whether you're briefing the board or a supplier who's never heard of Peppol.
A secure international network and set of standards for exchanging trading documents like invoices directly between buyers' and suppliers' systems, already widely used across Europe. Read our full Peppol guide here to understand how it works with e-invoicing.
A PDF is built for human eyes, not machines. Straight out of your supplier's finance system, the data's already digital, just stuck in the wrong wrapper. That's why it doesn't count as an e-invoice on its own, and why it's not going anywhere either: keep the PDFs coming, we'll read the data straight out and turn it into what the mandate needs. Read more on PDF vs E-invoicing.
Information organised in a fixed, predictable format that software can read and process automatically, rather than a document a person has to interpret and key in by hand. It's the difference between a spreadsheet and a photo of one.
A model where invoice data gets reported to the tax authority in close to real time, rather than filed after the fact. The 2029 UK mandate doesn't include this, HMRC has confirmed e-invoicing data won't need real-time reporting at launch. Whether a CTC-style requirement gets added later is still being explored, and the Peppol-based model we're building on is designed to add that kind of functionality without starting over, if it ever does.
Yes, from April 2029. The government confirmed at Autumn Budget 2025 that all VAT invoices for business-to-business (B2B) and business-to-government (B2G) transactions must be issued in a specified electronic format. Consumer (B2C) invoices are out of scope, and most businesses that aren't VAT-registered won't be obliged to take part.
HMRC's consultation ran from February to May 2025. Autumn Budget 2025 confirmed the April 2029 start, and Peppol was named the core network in June 2026. HMRC's implementation roadmap is due at Budget 2026 on 28 October 2026, with full guidance, technical specifications and legislation by the end of 2027–28.
No, HMRC's consultation response says invoices in PDF or Word format, images, HTML invoices in an email and scanned documents are not e-invoices. An e-invoice is structured data exchanged directly between the supplier's and buyer's finance systems, so it can be processed without anyone retyping it.
Peppol is an international network and set of standards for exchanging e-invoices between different systems. It runs in more than 90 countries, and NHS suppliers in England already use it. The UK named Peppol the core network for the mandate in June 2026. Most businesses connect through a certified Peppol access point provider rather than building their own connection.
The mandate covers VAT invoices, so VAT-registered businesses of every size are expected to be in scope. The government has said many of the smallest businesses that aren't required to register for VAT, and choose not to, won't be obliged. No turnover threshold or phased rollout has been announced yet.
Start with a supplier audit: how each supplier invoices you today, whether by PDF, paper, portal or EDI. Next, check whether your ERP can send and receive structured data, choose a Peppol-ready provider and onboard suppliers in waves. Going live with OpenECX typically takes around six weeks, so starting well before 2029 leaves room to do it properly.