Short answer: you do not need to act yet

GOV.UK published the implementation roadmap on 28 October 2026, so the date is now official. Below: what is changing, why, and three cheap checks worth doing now.

PDFs and emailed invoices do not count

An e-invoice is structured invoice data sent directly from your finance system to your customer's, with no one retyping anything.

An invoice sent by email is not an e-invoice. The format is what counts.

Every VAT-registered business is covered

Every VAT-registered business, including public sector bodies, has to comply. It covers both issuing and receiving invoices, and both start on the same date.

There is no size threshold, so a small VAT-registered firm is in scope the same as a large one. Overseas businesses registered for UK VAT are treated the same way.

It does not change when a VAT invoice is needed or what it must contain. Most sales to consumers, and supplies involving businesses that are not VAT-registered, are outside the requirement. The government is also developing a limited exemption for businesses that cannot use digital technology, with details due by April 2028.

Late payments are the stated reason

GOV.UK says late payments cost the UK economy £11 billion a year, and that small businesses spend an average of 86 hours a year chasing them. The argument is that invoices which arrive complete, correct and in the right place get processed and paid faster. The roadmap also says structured data makes some fraud harder, for example by flagging bank details that differ from a supplier's usual ones.

There is a second reason. The government's consultation response says the benefits only appear when enough businesses use compatible systems, and that countries without a mandate have not achieved significant uptake. That is why it chose to mandate.

Be realistic about savings: in the consultation, a few respondents quoted £30 to £50 to process an invoice, mostly smaller firms working manually, while others with automated systems reported negligible cost. The government says the responses are not a representative sample and no reliable average could be established, so treat exact savings claims from vendors with caution.

Peppol is the network behind it

Peppol is an international network for exchanging e-invoices and other business documents, such as purchase orders. It is run by OpenPeppol, a not-for-profit organisation, and has operated since 2008. Think of it as a shared language plus delivery rules, so software from different suppliers can pass invoices to each other.

The UK has chosen Peppol as the core framework, and HMRC will become the UK Peppol Authority. Invoices travel between you and your customer through certified providers called Access Points.

HMRC will not receive copies of your invoices just because they travel over Peppol.

You do not need to become an Access Point or connect to Peppol yourself. For most businesses, your accounting or finance software provider will handle it. Your job is to check that your software will support the UK requirements.

Separately, HMRC has opened a consultation on whether e-invoice data could be used for digital reporting in future. No decisions have been taken.

Dates to watch between now and 2029

The 2028 milestones are from KPMG's summary of the roadmap. Check GOV.UK for the latest.

The government says it will publish full details 12 to 18 months before the requirements take effect, giving at least 12 months to prepare. Penalties are expected to build on the existing VAT invoice penalty framework. No amounts or grace period have been stated.

New software may not be needed

Often not. GOV.UK says many small and medium businesses will not need separate e-invoicing software. Several software providers have committed to including e-invoicing in their core package at no extra cost once it is required. If you do not currently use suitable software, the roadmap says free or low-cost invoicing products already exist.

That is a statement of intent from the government and some suppliers, not a guarantee for every product. Ask yours.

If you use an EDI (electronic data interchange) network or another existing business-to-business platform, KPMG's reading of the roadmap is that you can keep it, as long as it can exchange invoices over the UK Peppol network for covered transactions. Government guidance on this is expected in autumn 2027.

ERPNext has community Peppol apps, not UK support

ERPNext, the open-source business software (ERP, or enterprise resource planning) we work with, does not have UK e-invoicing built in, and the UK rules are not finished anyway. But the open-source community is already working on Peppol. Prilk Consulting publishes two free apps: one that generates Peppol invoice files from ERPNext sales invoices, and one that sends and receives them through Peppol service providers. The apps are the bridge. The service provider is a separate company, and you would still need an account with one.

Both are listed on the Frappe Cloud Marketplace and work with ERPNext versions 15 and 16. They are community apps with very few installs so far, and they are built around European Peppol rules. Nobody should treat them as a UK-ready answer today. They do show that an open-source ERP can plug into Peppol without waiting for a vendor roadmap.

Three cheap checks to do now

GOV.UK is clear: "There is no need to begin implementing e-invoicing before the detailed requirements are published." So do not panic-buy anything. Three cheap things are worth doing:

• Find out how invoices are made and received today. Which system creates them, and which inbox do supplier invoices land in?
• Ask your accounting or business software supplier what their plan is. Will they support the UK Peppol framework, when, and is it included in your plan?
• Keep customer and supplier records tidy. Clean names, addresses and VAT numbers will make any switch easier.

Takeaway: these three steps are our suggestion, not government guidance.

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