Belgium e-invoicing 2026 superguide: What to know and how to connect to Peppol

Belgium is entering a new phase of digital tax transformation. On January 1, 2026, electronic invoicing becomes mandatory for nearly all B2B transactions. Every Belgian company – and every foreign supplier selling to Belgian buyers – must be able to send and receive structured e-invoices based on the European EN 16931 standard, typically exchanged via the Peppol network.

For many organizations, the mandate raises questions:

How do we comply? Will our ERP need modifications? Do we need a Peppol service provider? How do we avoid manual steps? How to avoid unnecessary costs and get the most efficient solution for my business?

The good news is that compliance can be extremely straightforward. The fastest and most robust approach is to use a Peppol-native solution that provides both an intuitive online interface and a complete developer API. Qvalia is developed precisely for this scenario.

This guide explains how the mandate works, what you need to implement, and how to get started instantly with Qvalia — whether you are a small business sending a few invoices per month or a large enterprise with complex system integrations.

Belgium has adopted EN 16931 as the legal basis for e-invoices and uses the Peppol network as the primary delivery channel. This means that on January 1, 2026:

The mandate covers both Belgian companies and international suppliers invoicing Belgian customers.

Because Belgium already mandates Peppol e-invoicing for the public sector, the infrastructure is in place. What changes in 2026 is scale: the standard becomes universal for private-sector transactions as well.

Instead of building custom connections or sending files manually, Peppol standardizes everything:

It eliminates the complexity of sending e-invoices to multiple local platforms, portals, or customer-specific endpoints. Once your company and your customer are registered in the network, the invoice is delivered instantly.

Qvalia is an accredited Peppol Access Point, meaning you receive full connectivity and compliance out of the box, and is included in Belgium’s official Software solutions for sending, receiving and processing electronic invoices list on the federal e-invoicing information portal.

Many companies overestimate the complexity of e-invoicing. With Qvalia, the onboarding process is 10 minutes.

The platform differs from conventional e-invoicing tools by taking a data-first, Peppol-native approach. The platform provides real-time network connectivity and supports the complete set of message types, from invoices to orders and despatch advices. Every transaction is normalized down to the line level, enabling reliable automation even at high volumes, backed by strong uptime and advanced user features. Finance and tax teams get full auditability, developers avoid lock-in, and getting started is easy with a free plan.

Connect by Qvalia gives you everything required to start sending compliant Belgian e-invoices:

No installation, no configuration, no technical knowledge required.

If you already use an ERP, finance system, or custom solution, Qvalia enables seamless API-based connectivity.

Developers can integrate:

Additional features include:

This lets you automate the entire B2B flow: from receiving purchase orders to sending the matching invoice back to the buyer. You can start small with the web app and move into API or advanced automation later — the same platform supports both.

Sign up for a Connect plan. Qvalia assigns your Peppol ID within minutes. This ID is what allows you to receive messages via Peppol.

Web app for manual invoicing, connector apps, or API/SFTP integration for automated invoice flows.

Both methods are fully compliant and available according to choice of plan.

Belgian customers will be identified by KBO number (BE + 10 digits). Qvalia validates delivery automatically. You can find Peppol IDs in the open directory here.

You can send a live invoice within Qvalia or test transmissions through the API sandbox.

Once you’re sending and receiving via Peppol, compliance is achieved. There is no additional Belgian platform you need to connect to.

This segment targets engineering teams integrating B2B invoice flows.

Qvalia uses standard REST conventions:

All API endpoints follow consistent patterns for invoices, orders, validation, and metadata.

Developers typically follow this flow:

Qvalia handles transformation into Peppol BIS Billing 3.0 and network delivery.

Incoming invoices can be:

The API provides:

This ensures invoices sent to Belgian customers will not be rejected.

Error handling

This is critical for ERP and automation workflows.

The underlying system is built on serverless AWS microservices:

Suitable for both small companies and enterprise-level volume.

Even with an strasystem, companies should plan ahead. Recommended preparation:

Qvalia provides direct support for onboarding and testing.

Ready to comply with Belgium’s 2026 mandate? Whether you are a small consultancy or a multi-entity enterprise with complex billing, you can be fully compliant in minutes. Start for free with a Connect and expand into API-based automation when needed.