Peppol Mandatory in Belgium from 2026: Essential Guide for Businesses

From the 1st of January 2026, electronic invoicing via Peppol has become mandatory for all Belgian businesses, not only for invoices sent to public authorities but also for business-to-business (B2B) transactions. Traditional PDF invoices or invoices sent by email attachments will no longer meet legal requirements.

This change is not limited to Belgian companies only. If you are an international entrepreneur, such as a Dutch or other EU-based business, supplying services, software, or training to Belgian companies, this obligation directly affects you. If your Belgian customer is legally required to receive invoices via Peppol, your invoicing process must be able to comply with it.

In this article, we explain what Peppol is, why Belgium is introducing this requirement, how it differs from UBL, and how you can prepare in a practical and future-proof way—particularly if you operate a digital learning or training platform using Maatos.

Who Is This Relevant For?

The upcoming Peppol obligation impacts more businesses than many expect:

• Belgian businesses
• Any organisation with a Belgian VAT number that invoices other Belgian businesses must use Peppol. This includes freelancers, sole traders, SMEs, non-profits, and larger enterprises.

• International businesses with Belgian customers
• If you sell software, courses, subscriptions, consulting, or other services to Belgian companies, your invoices must be deliverable via Peppol—even if your business is not established in Belgium.

• Maatos users
• If you run an online academy or training business on Maatos and sell courses or training programs to Belgian companies, your invoicing workflow must be Peppol-ready.

Belgium’s New E-Invoicing Regulation from 2026

Belgium has mandated Peppol for all B2B invoices between Belgian businesses starting 1 January 2026. While Peppol has been required for government invoices (B2G) for years, this extends to all private business transactions.
The legislation was adopted in 2024 and stipulates that Belgian companies must exchange invoices electronically via Peppol. Paper and PDF email invoices will no longer be legally valid for B2B use.

Key elements of the regulation

• Start date: 1 January 2026 for all Belgian VAT-registered entities
• Scope: All domestic B2B transactions, regardless of size or sector
• Exceptions: B2C transactions (private individuals without VAT numbers)
• Format: Must comply with European standard EN 16931 (UBL 2.1 via Peppol BIS)
• Transmission: Through certified Peppol Access Points only
• Enforcement: Belgian tax authorities will oversee compliance; non-compliant invoices may be invalidated and penalized

For foreign businesses invoicing Belgian companies, this means that your accounting or invoicing software must be Peppol-compatible as soon as you issue invoices to Belgian VAT-registered customers.

Belgium is taking this step not only to reduce VAT fraud and modernise administration, but also to align with the upcoming European VAT in the Digital Age (ViDA) initiative. ViDA is expected to introduce EU-wide e-invoicing and digital VAT reporting requirements from 2028 onward.

What Is Peppol?

Peppol stands for Pan-European Public Procurement Online and forms the backbone of Europe’s standardized electronic invoicing infrastructure. Instead of exchanging PDFs or emails, Peppol enables accounting systems to communicate directly through a secure, regulated network.

You can think of Peppol as a digital postal service for invoices. Each organization connected to the network has a unique Peppol ID, typically linked to its VAT number. This ensures invoices are routed automatically and securely to the correct recipient.

In reality, Peppol means:

• No manual emailing or uploading of invoices
• Invoices arrive directly in the recipient’s accounting system
• Fewer errors due to structured, validated data
• Faster processing and payment cycles
• Full compliance with European and national regulations

For Maatos users, Peppol acts as the bridge between your learning platform and your accounting environment. Maatos handles course sales and enrollments, while your connected accounting system manages legally compliant invoicing via Peppol. Each system focuses on its core role, while remaining seamlessly connected.

Benefits of Peppol for entrepreneurs and Maatos users

• Elimination of manual invoice handling
• Automated processing through your accounting software
• Reduced fraud risk thanks to controlled transmission channels
• Faster payments and cleaner bookkeeping
• Scalable, compliant infrastructure for international growth

Many widely used accounting tools already support Peppol or are actively rolling it out, including Moneybird, Exact Online, Odoo, Teamleader, and Yuki. For many Maatos users, Moneybird offers one of the most straightforward and user-friendly Peppol integrations.

What Is the Difference between Peppol and UBL?

Peppol and UBL are often confused, but they serve different purposes:

• UBL (Universal Business Language) defines the structure of the invoice—the XML format that software can read and process.
• Peppol is the network that securely transports that invoice between systems.

In other words, a Peppol invoice is a UBL invoice delivered via the Peppol network.

A simple analogy: UBL is the language you write in; Peppol is the postal network that delivers the message.

How to Handle Peppol When Using Maatos

While Maatos does not provide a native Peppol connection, it is designed to integrate seamlessly with external bookkeeping tools that already handle Peppol compliance. This platform is not intended to replace your accounting system, but rather to complement it.

This approach allows you to remain fully compliant without changing how you sell or manage courses inside Maatos. If you’re seeking a more hands-off approach, consider exploring our done-for-you service, where we handle the technical setup while you focus on your course.

Typical setup

1. Connect Maatos to your accounting system
   Integrate Maatos with Moneybird or another supported accounting tool using an API connection.
2. Configure automatic invoice syncing
   Once connected, invoices generated from Maatos sales are automatically forwarded to your accounting system.
3. Enable Peppol in your accounting software
   Within your accounting tool, activate Peppol e-invoicing. Incoming invoices from Maatos are then sent via the Peppol network by default.
4. Verify customer Peppol availability
   Most modern accounting systems automatically detect a customer’s Peppol ID based on their VAT number. No manual configuration is typically required.
5. Use Maatos for sales, not bookkeeping
   Maatos manages sales, enrolments, and payments; your accounting software ensures correct, compliant invoicing.

To better manage these processes and leverage our platform’s capabilities, it’s beneficial to discover the features of Maatos which can significantly enhance your course business management experience. Also, when considering using Maatos for your course management needs, it’s important to review our pricing plans which start at €49,- per month after an initial free trial period of 30 days.

Recommended integrations

• Moneybird – Simple setup, strong automation, and full Peppol support
• E-boekhouden.nl – Suitable for businesses seeking deeper accounting automation

The Future of E-Invoicing in Europe

The European Commission’s VAT in the Digital Age (ViDA) initiative aims to establish a harmonized framework for e-invoicing and near real-time VAT reporting across the EU. The European standard EN 16931 is expected to become the default, with interoperable networks such as Peppol playing a central role.

Expected timeline

• 2025–2026: Early adopters such as Belgium mandate B2B e-invoicing; other countries expand B2G requirements and prepare B2B legislation
• 2027–2028: Broader rollout of ViDA components, including standardised formats and interoperable networks
• Beyond: PDF and email invoices increasingly phased out in favour of machine-readable invoices

Signals from the Netherlands and other markets

• B2G e-invoicing has long been mandatory for central government entities
• No formal B2B mandate yet, but strong market and policy signals are emerging
• Accounting and ERP platforms increasingly enable Peppol by default
• Procurement departments are more frequently rejecting PDF invoices

The direction is clear: broader e-invoicing adoption is inevitable. Early adoption reduces rework and simplifies future compliance.

What This Means for Maatos Users

If you connect Maatos to a Peppol-enabled accounting system and use UBL as your standard invoice format, you are immediately prepared for:

• Belgian B2B invoicing requirements
• Increasing Peppol adoption among Dutch and EU business customers
• Future ViDA-driven EU regulations

Recommended actions:

• Make Peppol the default for all B2B invoices
• Use structured invoice formats consistently
• Document your invoicing workflow (for audits, ISO processes, and customer assurance)

This is not just about compliance. Digital invoicing improves efficiency, professionalism, and scalability. It are critical factors for growing an international training and SaaS-oriented education businesses.

Summary

• From 2026, Peppol invoicing is legally mandatory for all Belgian VAT-registered businesses, including freelancers and non-profits.
• Peppol is a secure European network for electronic invoices, built on UBL and the EN 16931 standard.
• International businesses invoicing Belgian customers must ensure Peppol compatibility, including those selling courses or training through Maatos.
• Maatos users should integrate with accounting tools such as Moneybird or Exact Online to handle Peppol invoicing automatically.
• Adopting Peppol now delivers immediate efficiency gains while ensuring compliance with Belgian law and upcoming EU-wide ViDA requirements.

Read More

• Peppol.org
• E-Factuur Belgie (van de overheid)
• Moneybird: Factureren via Peppol
• E-boekhouden: Facturatie en administratie inclusief Peppol