The UK eInvoicing mandate: what changes, and when
The government has announced that from April 2029, every VAT invoice between UK businesses, and between businesses and the public sector, will need to be a structured electronic invoice. The law is not in place yet. The government has named Peppol as the network the UK will use, and it publishes its implementation roadmap at the Budget on 28 October 2026. Transalis is a certified Peppol Access Point, so one connection gets you ready.
When does eInvoicing become mandatory in the UK?
From April 2029, the date the government has announced. The law is not in place yet: the roadmap arrives on 28 October 2026, and businesses then have until 2029 to get ready.
- AnnouncedConfirmed
At Budget 2025 the government announces mandatory eInvoicing for all VAT invoices from April 2029. It says there will be no real-time reporting to HMRC alongside it.
- AnnouncedConfirmed
The government names Peppol as the core network for eInvoicing in the UK.
- Next
Budget 2026. The government publishes its implementation roadmap, which is expected to set out the technical standards, whether the rollout is phased and how the law will be made.
- Prepare
The window to get ready: connect to Peppol through an Access Point, tidy supplier and customer data, and test invoices with your main trading partners.
- Planned start
The announced start date. Every VAT invoice for business and public sector sales will need to be a structured eInvoice, and a PDF sent by email will no longer meet the requirement.
Mandate detail last checked against GOV.UK: 5 October 2026.
Is eInvoicing mandatory for B2B in the UK?
Yes. Under the government's announced plans, from April 2029 every VAT invoice for business and public sector sales will need to be a structured eInvoice. Sales to consumers are not included.
All VAT invoices are in scope
The mandate covers every VAT invoice issued for business to business (B2B) and business to government (B2G) transactions where VAT is due.
Sales to consumers are not
Invoices to private individuals (B2C) are outside the mandate. If you sell to both businesses and consumers, only the business and public sector side changes.
A PDF is not an eInvoice
The government defines an eInvoice as one that is issued, sent and received in a structured format that allows automatic processing. A PDF, a scan or a paper invoice does not meet that definition.
No real-time reporting in 2029
The government has said it will not introduce real-time reporting to HMRC alongside the mandate. Invoices move between businesses, not through a central HMRC hub.
How will UK eInvoicing work, and what is Peppol?
Invoices will travel over Peppol, the network the government has named for the UK. Each business connects once, through a Peppol Access Point, and can then reach every other business on the network.
- 1Your systemYour ERP or accounting software creates the invoice
- 2Your Access PointChecks it and sends it over Peppol
- 3Their Access PointReceives it for your customer
- 4Their systemThe invoice arrives ready to process
Peppol is the UK's network
The government has named Peppol as the core interoperability network for UK eInvoicing. Peppol is already used across most of the EU, Australia, Japan and Singapore, and NHS Supply Chain already requires its suppliers to use it.
A decentralised model
Businesses exchange eInvoices through their service providers, rather than sending every invoice to a government platform. On Peppol, those service providers are called Access Points.
One connection reaches everyone on the network
Once you are connected through an Access Point, you can send to and receive from any other Peppol participant, in the UK or abroad, without a separate link to each one.
The exact standards come with the roadmap
The technical detail is expected at Budget 2026. Peppol invoices today use the Peppol BIS Billing 3.0 format, which is based on the European standard EN 16931.
What should UK businesses do to prepare for eInvoicing?
Six steps, and none of them needs to wait for the roadmap. The businesses that start now have time to test before 2029 rather than rush.
Count what you send and receive
List how many VAT invoices you issue and receive each month, in which formats, and through which systems.
Check your systems
Find out whether your ERP or accounting software can produce and read structured invoices, or will need a connection that does it for them.
Choose a Peppol Access Point
Pick the provider that will connect you to Peppol, give you a Peppol ID and check each invoice before it is sent.
Tidy your trading partner data
Make sure VAT numbers, legal names and Peppol IDs for your customers and suppliers are complete and accurate.
Test with your main partners
Send and receive test invoices with your largest customers and suppliers well before 2029, so problems are fixed while there is time.
Watch the 28 October roadmap
The roadmap is expected to confirm the standards and any phasing. Plan your timeline around it.
What eInvoicing software supports the UK mandate?
You need a Peppol Access Point and a way to turn your invoices into structured data. Transalis provides both as one managed connection, alongside the ERP you already use.
- organisations
- 15,000+
- countries
- 50+
- invoice value processed annually
- 7bn+
A network that is already there
The Transalis Trading Network connects 15,000+ organisations across 50+ countries and processes 7bn+ in invoice value a year, so many of your trading partners may already be on it.
Certified Peppol Access Point
Transalis is a certified Peppol Access Point using AS4, and has held a place on the Crown Commercial Service Peppol Access Point framework for the UK public sector.
Already live where mandates have started
Transalis connects businesses for Belgium's mandate, live since January 2026, and is on the French tax authority's register of approved eInvoicing platforms for France's.
Your ERP stays as it is
Transalis connects to your existing ERP or accounting system, handles the format and the Peppol delivery, and shows every invoice's status in eInvoiceTrack.
UK eInvoicing mandate: common questions
When does eInvoicing become mandatory in the UK?
From April 2029. The government announced at Budget 2025 that all VAT invoices will need to be issued as eInvoices from that date. It publishes the implementation roadmap at Budget 2026 on 28 October 2026.
Is the April 2029 eInvoicing date law yet?
Not yet. April 2029 is the date the government announced at Budget 2025, and the law to make it a requirement has not been passed. The implementation roadmap, due at Budget 2026 on 28 October 2026, is expected to set out the detail. Businesses are still advised to prepare now, because connecting to Peppol and cleaning up supplier data takes time.
Is eInvoicing mandatory for B2B in the UK?
Yes, from April 2029 under the government's announced plans. The mandate will cover all VAT invoices for business to business (B2B) and business to government (B2G) transactions where VAT is due. Invoices to consumers (B2C) are not included.
Will the UK use Peppol for eInvoicing?
Yes. The government has named Peppol as the core interoperability network for eInvoicing in the UK. Businesses will connect through a Peppol Access Point, a certified provider that sends and receives invoices on their behalf.
Is a PDF invoice an eInvoice?
No. The government defines an eInvoice as an invoice issued, sent and received in a structured format that allows automatic processing. A PDF attached to an email does not meet that definition, so it will not satisfy the mandate.
Will HMRC require real-time reporting?
Not in 2029. The government has said it will not introduce real-time reporting to HMRC alongside the eInvoicing mandate, and will look at it separately once eInvoicing is established.
Does the mandate apply to small businesses?
The mandate covers all VAT invoices, so VAT-registered businesses of every size are affected. Whether the rollout is phased by business size is expected to be set out in the roadmap on 28 October 2026.
What eInvoicing software do I need for the UK mandate?
You need a way to create and receive structured invoices and a connection to Peppol through an Access Point. Many businesses keep their ERP or accounting system and add a managed Peppol connection, such as Transalis, which handles the format, delivery and status tracking.
Sources
- GOV.UKPromoting electronic invoicing across UK businesses and the public sector, consultation response (updated 26 November 2025) (opens in a new tab)The government's response to its eInvoicing consultation. It sets out the plan for all VAT invoices, B2B and B2G, from April 2029, and how an eInvoice is defined.
- GOV.UKBudget 2025 (opens in a new tab)The Budget of 26 November 2025, where the government announced mandatory eInvoicing for all VAT invoices from April 2029, with no real-time reporting to HMRC alongside it.
- GOV.UKTax update 2026, simplification, modernisation and fairness (23 June 2026) (opens in a new tab)The government's update of 23 June 2026, which names Peppol as the core interoperability network for eInvoicing in the UK.
- GOV.UKElectronic invoicing consultation document, definitions of an eInvoice and the four-corner model (opens in a new tab)The original consultation. It defines an eInvoice as structured data a system can process, and explains the four-corner model for exchanging invoices.
Read next
- eInvoicing in France and BelgiumThe two mandates already under way in Europe, with the dates, the formats and what UK suppliers need to do.Read more
- UK eInvoicing changes: the countdown to complianceWhat the 2029 mandate means for finance teams, and why a PDF invoice will no longer be enough.Read more
- How to connect your ERP to PeppolThe ways UK businesses connect their ERP and finance systems to Peppol, and how to choose between them.Read more