Peppol is an international network that lets businesses and governments exchange invoices and other documents as structured electronic data, in one standard format, no matter which software each side uses. If you run a small business in Europe, you will meet Peppol the moment e-invoicing becomes mandatory in your country — and in several countries, that moment has already arrived. This guide explains what Peppol is, how it works, what it costs, and whether you have to use it, without the technical jargon.
Peppol in brief
The essentials What it means for you What it is A secure network plus a shared format for sending electronic invoices between organisations Who uses it Businesses and public bodies in 30+ countries across Europe, Asia-Pacific and beyond What it sends Invoices, credit notes, purchase orders and other business documents — as data, not PDFs Main format Peppol BIS Billing 3.0, built on the European standard EN 16931 Governed by OpenPeppol, a non-profit association based in Brussels Where it’s mandatory Belgium today; France, Germany, Poland and others phasing in — see the country table below What it costs you The network is free to join; you pay an Access Point or invoicing app to connect
What is Peppol?
Peppol is not software and not a company — it is a set of shared standards and a secure network that let any connected organisation exchange structured electronic documents with any other. Think of it less like an app you buy and more like a rulebook plus a delivery network that everyone agrees to use.
The name began as an acronym for Pan-European Public Procurement OnLine. The project started in 2008 as an EU-funded effort to make cross-border public buying easier. It has long since outgrown that original scope, so today “Peppol” is simply treated as a proper noun. It is now used in more than 30 countries, including outside Europe.
Peppol is governed by OpenPeppol, a non-profit association. OpenPeppol sets the technical rules, certifies the providers that connect businesses to the network, and keeps the whole system interoperable — meaning an invoice sent from one country and one software package can be read correctly by a recipient using completely different tools.
For a small business, the key point is this: Peppol replaces emailed PDFs and paper with structured data. A human reads a PDF; a computer reads structured data automatically. That is the shift e-invoicing laws across Europe are now requiring, and Peppol is the most common way countries are delivering it. If you want the bigger picture of how this fits alongside other types of invoices, we cover that separately.
How the Peppol network works: the four-corner model
The Peppol network connects a sender and a recipient through two certified intermediaries called Access Points, so the two businesses never have to connect their systems to each other directly. This design is known as the four-corner model, and it is the reason Peppol scales to millions of businesses without each one needing a custom integration.
Here are the four corners, in order:
Corner Who What they do 1 Sender Creates the invoice in their accounting app or invoicing software 2 Sender’s Access Point Validates the invoice, converts it to the Peppol format, and sends it into the network 3 Recipient’s Access Point Receives the invoice and checks it, then passes it to the recipient 4 Recipient Gets a validated, structured invoice ready to process automatically
You only ever deal with corner two — your own Access Point. You do not need to know what software your customer uses, only their Peppol identifier. The two Access Points handle validation, routing and delivery confirmation between them. It works much like sending a parcel: you hand it to your carrier, and you trust the carrier network to get it to the right door, whoever the recipient’s carrier happens to be. You and your customer can use the same Access Point or two completely different ones — the invoice still gets through, because every certified Access Point is interoperable with every other.
One nuance worth knowing: a few countries are adding a fifth corner. France, for example, requires invoice data to also be reported to the tax authority, so its model routes a copy to the government as well. The core sending-and-receiving experience for you stays the same.
Is Peppol mandatory? A country-by-country status table
Peppol itself is not a single law, but a growing number of countries now legally require businesses to send and receive e-invoices, and many of them use the Peppol network to do it. Whether you must use it depends entirely on where your business is registered. The table below summarises the position in Billdu’s priority markets as of May 2026.
Rules change fast. Mandate dates and thresholds are moved by governments regularly. Always confirm your own deadline with your national tax authority before acting on it. The status below was verified in May 2026.
Country Status What applies More detail Belgium Mandatory now Since 1 January 2026, all VAT-registered businesses must send and receive structured B2B e-invoices via Peppol. France From Sep 2026 All businesses must be able to receive e-invoices from September 2026; large and mid-sized firms must also issue them, with smaller firms following in 2027. DGFiP Germany Phasing in Receiving structured e-invoices has been mandatory since January 2025; issuing becomes mandatory for larger firms in 2027 and all B2B in 2028. XRechnung / ZUGFeRD Poland From 2026 The national KSeF system became mandatory in 2026. This is a national platform rather than Peppol — see the next section. KSeF Italy Mandatory since 2019 Italy runs the longest-standing B2B mandate in Europe through its SdI system, not Peppol — see the next section. SdI / FatturaPA Spain Delayed to 2027 The B2B timeline was pushed back; many sources still show older dates, so check the current position carefully. AEAT UAE From 2027 A pilot is expected in mid-2026 with the mandate following in 2027, using a Peppol-based model. FTA EU-wide From 2030 Under ViDA (“VAT in the Digital Age”), structured e-invoicing for all cross-border B2B trade within the EU becomes mandatory from July 2030. European Commission
If your country is not listed, the safest assumption in 2026 is “not yet, but soon.” The EU’s ViDA reforms set 2030 as the backstop for cross-border trade, and most member states are moving ahead of that date with their own national rules.
Peppol vs your national system (KSeF, SdI, XRechnung)
Not every e-invoicing mandate uses Peppol — some countries run their own national platform instead, and confusing the two is the most common mistake small businesses make. Here is how Peppol relates to the national systems you are most likely to hear about.
System Country Is it the same as Peppol? KSeF Poland No. KSeF is a centralised national platform run by the tax authority. Invoices go through the government system, not the Peppol network. SdI / FatturaPA Italy No. Italy’s Sistema di Interscambio is a national clearance system. The FatturaPA format and SdI predate the country’s wider Peppol use. XRechnung / ZUGFeRD Germany Partly. These are German invoice formats based on the same EN 16931 standard Peppol uses; they can travel over Peppol but are defined separately. Peppol BIS 3.0 Pan-EU This is the Peppol format itself — the common standard the network is built around.
The thread tying them together is the European standard EN 16931. Most national systems and Peppol all build on it, which is why a single, well-designed invoicing app can support several of them. What differs is the delivery route: Peppol uses Access Points and the open network; KSeF and SdI route through a government platform instead.
Key Peppol terms explained
A handful of Peppol terms come up constantly, and each one describes a simple idea once the jargon is stripped away. Here are the five you will actually need.
Peppol ID (Participant ID). Your unique address on the network. It is usually built from your VAT number or company registration number, and it is how Access Points find the right recipient — the equivalent of a postal address for your invoices.
Access Point. A certified provider that connects you to the network and sends or receives documents on your behalf. You cannot join Peppol directly; you go through an Access Point, in the same way you need an email provider to send email.
Peppol BIS Billing 3.0. The standard invoice format used on the network. “BIS” stands for Business Interoperability Specification. It defines exactly what fields an invoice must contain so any recipient can read it.
EN 16931. The official European standard for what a structured e-invoice must include. Peppol BIS 3.0 is one way of meeting it. National formats like XRechnung are another.
SMP (Service Metadata Publisher). A behind-the-scenes directory that tells your Access Point where to deliver a document. You will never touch it directly, but it is what makes “send to any business on the network” possible.
Peppol Authority. When a country adopts Peppol, it appoints a Peppol Authority — a government-designated body that regulates how the network is used nationally, manages local participants, and keeps it interoperable with the rest of the network. France’s tax authority, the DGFiP, is one example. You never deal with the Authority directly, but it is the reason a national mandate and the open network fit together.
How much does Peppol cost?
Joining the Peppol network is free, but connecting to it is not — you pay an Access Point provider or an invoicing app that includes Peppol sending, usually as part of a monthly subscription. There is no central Peppol fee and no per-invoice charge from OpenPeppol itself.
In practice, costs fall into three rough tiers. Standalone Access Point services aimed at larger senders can run to hundreds of euros a month. Accounting platforms increasingly bundle Peppol into mid-tier plans. And invoicing apps built for small businesses and freelancers typically fold it into an affordable monthly fee, which is the most cost-effective route if you send a modest number of invoices.
For a sole trader or small firm, the practical question is rarely “how much does Peppol cost” in isolation — it is “does the invoicing tool I already use support Peppol, and at what plan level.”
How to start sending Peppol invoices
To send a Peppol invoice you need three things: your Peppol ID, an Access Point connection, and software that produces invoices in the Peppol BIS 3.0 format. Most small businesses get all three from a single invoicing app rather than assembling them separately.
With Billdu, the flow looks the way invoicing always has: you create an invoice as normal, and Billdu’s Peppol e-invoicing converts it to the required format and sends it through a certified Access Point on your behalf. You do not have to learn the technical layers underneath — the four corners, the SMP lookup, the validation — because the app handles them.
For a complete walkthrough with screenshots, see our step-by-step guide on how to send a Peppol invoice. And if you simply want to produce a compliant document quickly, you can create an invoice for free to see the structure first.
Methodology and sources
This guide draws on primary regulatory and governance sources, verified in May 2026. Mandate dates and thresholds change, so each is re-checked on a regular schedule against the issuing authority.
- OpenPeppol — network governance, certified Access Points, and the Peppol BIS Billing 3.0 specification
- European Commission — VAT in the Digital Age (ViDA) — the EU-wide 2028 and 2030 timeline
- EU Directive 2014/55/EU and the EN 16931 standard — the basis for structured e-invoicing in Europe
- National tax authorities for country-specific status: FPS Finance / BOSA (Belgium), DGFiP (France), Bundesfinanzministerium and KoSIT (Germany), Agenzia delle Entrate (Italy), AEAT (Spain)
