UK E-Invoicing 2029: What the Peppol Mandate Means for Your Business
Short answer: From 1 April 2029, VAT invoices between UK businesses, and from businesses to the public sector, must be structured e-invoices. On 23 June 2026 the government confirmed they will travel over Peppol, a decentralised network where each business uses a certified access point. There is no real-time reporting to HMRC in the first phase, and consumer invoices are out of scope.
The detailed roadmap, including any phasing by business size, is expected at the November 2026 Budget. The work that decides how hard 2029 will be can start now: clean customer and VAT data, and an ERP that can produce a valid structured invoice.
What has been decided
| Question | Current position |
|---|---|
| When? | 1 April 2029 |
| Which invoices? | All VAT invoices between businesses (B2B) and from businesses to government (B2G) |
| Consumer invoices? | Out of scope |
| Network | Peppol, in a decentralised four-corner model with certified access points |
| Data standard | The European standard EN 16931, expected to travel as Peppol BIS Billing 3.0 in UBL |
| Reporting to HMRC | None in the first phase |
| Next milestone | Detailed roadmap expected at the November 2026 Budget |
How we got here
| Date | Step |
|---|---|
| February to May 2025 | HMRC and the Department for Business and Trade consult on e-invoicing |
| 26 November 2025 | The Budget confirms mandatory B2B and B2G e-invoicing from April 2029 |
| January 2026 | A co-design phase with businesses and software providers begins |
| 23 June 2026 | Peppol confirmed as the core interoperability network |
| November 2026 | Detailed roadmap expected at the Budget |
| 1 April 2029 | Mandate begins |
What is still open
- Phasing. Commentators expect larger businesses to start first, but no phasing by size has been confirmed. Plan for April 2029 unless the roadmap says otherwise.
- Existing EDI. Many UK businesses already exchange invoices through EDI or supplier portals. The government has said it will keep working with stakeholders on systems that cannot connect to Peppol.
- Access point accreditation and penalties. How access points are certified in the UK, and what happens if you get an invoice wrong, are still to be set out.
- Future reporting. There is no reporting to HMRC at the start. Reporting could be added in a later phase, so do not assume it will never come.
How Peppol works
Peppol is called a four-corner model because four parties touch each invoice. Your ERP creates the invoice. Your access point sends it. Your customer's access point receives it. Their system imports it. Access points find each other through a shared directory, so you do not need a separate connection to every customer, and your customers do not all need the same software as you.
The UK chose this over a central government platform, which is the model Poland and Saudi Arabia use. For UK businesses that means less government involvement in each invoice, but it also means choosing an access point provider and connecting your ERP to it.
What it means for your finance team
| Area | What changes |
|---|---|
| Customer data | Every business customer needs a correct VAT number and a Peppol identifier, or invoices cannot be delivered |
| VAT on each line | Rates and exemption reasons must be set per invoice line, not typed into a description |
| Units and codes | Units of measure need standard codes, not free text such as "box" or "pcs" |
| Credit notes | Each credit note must reference the invoice it corrects |
| Accounts payable | Supplier invoices arrive as data, so purchase invoice entry can be automated instead of keyed from PDFs |
| Making Tax Digital | Invoice data should flow into VAT records through digital links, which MTD already requires |
A realistic plan from now to April 2029
- Late 2026. Read the Budget roadmap. Audit customer VAT numbers, tax codes and units of measure, and check whether your ERP can produce EN 16931 invoices.
- 2027. Fix the data. Upgrade or replace the ERP if it cannot produce structured invoices. Shortlist access point providers.
- 2028. Connect an access point, start receiving e-invoices from suppliers who already send them, and pilot sending with willing customers.
- Early 2029. Switch remaining customers over, and keep one period-end close under review before the mandate starts.
Can ERPNext produce UK e-invoices?
Yes, with apps from the ERPNext partner ecosystem rather than the core product. The EDocument app from Prilk Consulting generates and imports invoices and credit notes in the Peppol BIS Billing 3.0 format, with schema and business-rule validation, on ERPNext 15 and 16. Delivery over the network needs a certified access point connected through an integration. For trading partners in Germany or France that expect XRechnung, ZUGFeRD or Factur-X, the European e-Invoice app from ALYF GmbH covers those formats.
Making Tax Digital for VAT is handled separately: UK VAT apps for ERPNext submit VAT returns directly to HMRC. Our UK implementation service sets up both, and the Europe and UK deadlines guide covers the EU mandates your customers and suppliers may already face.
Our interest, declared
TABSYST implements ERPNext, so we benefit if you choose it, and this guide is written to be useful whatever system you run. We are an official ERPNext (Frappe) partner with offices in Dubai and Calicut, India, and no UK office. UK projects run remotely on UK working hours, with fixed-scope quotes in GBP. Tell us what you run today if you want a view on your readiness.
Frequently asked questions
When does e-invoicing become mandatory in the UK?
From 1 April 2029, for VAT invoices between businesses and from businesses to the public sector. The government confirmed the date at the November 2025 Budget, and a detailed roadmap is expected at the November 2026 Budget, which may set out any phasing by business size.
Which invoices are in scope of the UK e-invoicing mandate?
All VAT invoices issued between VAT-registered businesses and from businesses to government bodies. Invoices to consumers are out of scope.
Does the UK e-invoicing mandate use Peppol?
Yes. On 23 June 2026 the government confirmed Peppol as the core interoperability network, using a decentralised four-corner model in which each business connects through a certified access point rather than a central government platform.
Will UK businesses have to report invoices to HMRC in real time?
Not in the first phase. The confirmed model exchanges invoices between businesses without real-time reporting to HMRC. Reporting could be added in a later phase, so it is worth keeping invoice data clean enough to support it.
Is a PDF invoice still acceptable after April 2029?
Not for invoices in scope of the mandate. An e-invoice is structured, machine-readable data exchanged over Peppol. A PDF sent by email is an image of an invoice, not an e-invoice.
Can ERPNext send Peppol e-invoices?
ERPNext can generate and import Peppol BIS Billing 3.0 invoices through the open-source EDocument app, which supports ERPNext 15 and 16. Sending them over the Peppol network requires a certified access point connected to ERPNext.
Based on the November 2025 Budget, the June 2026 policy update and adviser summaries available on 16 September 2026. The roadmap is still to be published, so check for updates after the November 2026 Budget. Last reviewed 16 September 2026.