If your business invoices in Belgium, the Nordics or the Netherlands, or plans for the UK’s April 2029 e-invoicing requirement, one word keeps appearing: Peppol. Belgium has made it the default channel for its B2B mandate. HMRC has confirmed it will be the core framework for UK e-invoicing. Public bodies across Europe, and governments as far away as Australia and Singapore, already use it.
This guide explains what Peppol is, how it works, what it costs and how to choose a provider, without the jargon that usually surrounds it.
Key takeaways
- Peppol is a network and a rulebook, not a piece of software. It lets any connected business exchange invoices and other documents with any other, whichever provider each uses.
- It works on a four-corner model: sender, sender’s access point, receiver’s access point, receiver.
- Businesses join through a certified access point provider and get a Peppol ID, usually based on a VAT or company number.
- The standard invoice format, Peppol BIS Billing 3.0, is based on the European standard EN 16931.
- Peppol is mandatory in Belgium for domestic B2B invoices since 2026, and HMRC has confirmed it as the framework for the UK from April 2029.
In this guide
What Peppol is
Peppol, which originally stood for Pan-European Public Procurement OnLine, started as an EU project to help suppliers send electronic documents to public bodies in other countries. It is now governed by OpenPeppol, a non-profit association based in Belgium, and used well beyond public procurement.
Peppol has three components:
- A network of certified access points that exchange documents securely.
- Common specifications for documents, most importantly Peppol BIS Billing 3.0 for invoices and credit notes, plus orders, despatch advice and others.
- A governance framework: agreements that every access point provider signs, supervised by OpenPeppol and by national Peppol Authorities.
The easiest way to think of it is a telephone network for invoices. You choose your own provider, the receiver chooses theirs, and the network makes sure the call connects.
How the four-corner model works
| Corner | Who | Role |
|---|---|---|
| 1 | Sender (supplier) | Creates the invoice in its ERP or accounting software |
| 2 | Sender’s access point | Validates the invoice, looks up the receiver and transmits it securely |
| 3 | Receiver’s access point | Receives and validates the document |
| 4 | Receiver (customer) | Gets the invoice straight into its accounting system |
To find where to send a document, the sender’s access point checks a central registry, the Service Metadata Locator (SML). That points to the Service Metadata Publisher (SMP) holding the receiver’s details: which access point it uses and which document types it accepts.
Some countries add a fifth corner: the tax authority. In a five-corner model, access points also send invoice data to the government. Belgium plans to add this for e-reporting from 2028, and the EU’s VAT in the Digital Age (ViDA) rules point in the same direction for cross-border trade from 2030.
Where Peppol is required or used
| Country | Status |
|---|---|
| Belgium | Default channel for mandatory domestic B2B e-invoicing since 1 January 2026; e-reporting via Peppol planned from 2028 |
| United Kingdom | HMRC’s October 2026 policy paper confirms Peppol as the core framework for mandatory e-invoicing from 1 April 2029; widely used by NHS suppliers today |
| Germany | Accepted channel for federal public-sector invoices; one of several options for the 2027–2028 B2B mandate |
| Croatia | Used as part of the Fiscalisation 2.0 framework since 2026 |
| Netherlands, Nordics, Ireland | Widely used for public-sector and voluntary B2B invoicing |
| Outside Europe | Australia, New Zealand, Singapore and Japan have adopted Peppol-based national frameworks |
Not every country uses Peppol. France routes invoices through approved national platforms, and Italy and Poland use government clearance systems. See our guides to France and Germany.
How a business joins
- Choose an access point provider. This may be your accounting or ERP vendor, a specialist e-invoicing provider or a bank. OpenPeppol publishes a list of certified providers.
- Get registered. The provider registers your business in the SMP under a Peppol ID, typically your VAT or company registration number with a country-specific prefix.
- Connect your systems. Many cloud accounting packages have Peppol built in. Larger companies connect their ERP through an API or an integration platform.
- Test. Send and receive test documents with a few trading partners before switching over.
You only need one access point to reach every other Peppol participant. If your customer uses a different provider, the network still delivers the invoice.
What it costs
There is no central fee for using Peppol; costs come from your provider. Typical pricing models are:
- Bundled with cloud accounting software, often with a cap on monthly documents;
- Per document, common for specialist providers;
- Subscription plus integration, for ERP-connected enterprise set-ups, where integration work usually costs more than the transmission fees themselves.
Because prices vary widely by volume, country coverage and integration needs, ask at least two providers for quotes based on your actual annual invoice numbers.
Choosing an access point provider
| Question to ask | Why it matters |
|---|---|
| Are you a certified Peppol access point, or do you resell another provider? | Affects support quality and accountability |
| Which countries’ rules and formats do you support? | Belgium, Germany (XRechnung), UK (from 2029) and others have national specifics |
| Do you also handle non-Peppol mandates? | France, Italy, Poland and Spain need different connections |
| How do you integrate with our ERP or accounting software? | Determines how much manual work remains |
| How do you handle validation errors and rejections? | Rejected invoices delay payment |
| Will you support five-corner e-reporting when it arrives? | Belgium from 2028; ViDA from 2030 |
| What are the exit terms? | Moving your Peppol ID to a new provider should be simple |
What Peppol does not do
- It does not check whether your VAT treatment is correct. It validates structure, not tax logic.
- It does not replace your archiving obligations; you must still keep the invoice for the statutory period.
- It does not by itself satisfy clearance mandates such as Italy’s SdI or Poland’s KSeF.
- It does not make payments. Some providers combine invoicing and payments, but these are separate services.
Frequently asked questions
Is Peppol only for public-sector invoices?
No. It began in public procurement but is now widely used for B2B invoices, and it is mandatory for domestic B2B invoicing in Belgium.
Do UK businesses need Peppol now?
Not by law until April 2029, apart from contractual requirements such as those of some NHS bodies. HMRC has confirmed Peppol as the core framework for the 2029 regime, so choosing software with Peppol support now avoids a second migration.
What is a Peppol ID?
A unique identifier that tells the network where to deliver your documents. It usually combines a scheme code and a national identifier such as a VAT or company registration number.
Can I use Peppol for German e-invoices?
Yes. Germany does not prescribe a channel, and Peppol can carry XRechnung invoices. Agree the channel with your customers.
Is Peppol secure?
Documents are transmitted between certified access points using the AS4 messaging protocol with encryption and signatures, and providers must meet OpenPeppol’s operational and security requirements.
Conclusion
Peppol has become the default “plumbing” for e-invoicing in a growing number of countries. For businesses trading in Belgium, the UK or across several European markets, one Peppol-capable provider, ideally one that also covers non-Peppol mandates, is the simplest way to stay compliant as rules tighten between now and 2030.
Sources
- OpenPeppol, peppol.org: governance, specifications and certified access point list
- HMRC, E-invoicing requirements (policy paper, 28 October 2026)
- FPS Finance Belgium, B2B e-invoicing guidance; BDO Belgium summary
This article is general information and not tax, legal or procurement advice. Last checked: 7 November 2026. See our Disclaimer.