Belgium's Next Step: Real-Time e-Reporting Through the 5-Corner Model

Q: What has Belgium already done?

[Belgium mandated B2B e-invoicing](/country/BE) from 1 January 2026 for all VAT-registered businesses. The mandate requires the use of **Peppol BIS 3.0**, which is fully compliant with the EN 16931 European standard. A three-month grace period ran through the end of March 2026, giving businesses time to adapt their processes before enforcement began in earnest. This makes Belgium one of the first EU countries to require the Peppol network for domestic B2B transactions - not just cross-border or government procurement. The decision to build on Peppol rather than creating a bespoke national platform has been widely noted, as it sets a precedent for how smaller EU member states can adopt e-invoicing without the cost and complexity of a standalone system. For a detailed walkthrough of the mandate and its practical requirements, see the [Belgium e-invoicing guide](/guides/belgium-e-invoicing).

Q: What is the 5-corner model?

In a standard [4-corner Peppol setup](/blog/how-e-invoicing-networks-work), invoices flow between trading partners via their Access Points and the tax authority plays no part in the exchange. The **5-corner model** changes that: Access Points report transaction data to the government automatically as part of the delivery, giving tax authorities a near-real-time view of economic activity. For a fuller explanation of how all the network models compare, see the [e-invoicing networks post](/blog/how-e-invoicing-networks-work). Belgium's planned version builds directly on the Peppol infrastructure that already handles B2B invoicing. No separate national platform is needed - the existing Access Points simply gain an additional reporting duty.

Q: How does this compare to France's approach?

[France's 2026 mandate](/country/FR) also uses a CTC model with real-time reporting, but the architecture is different. France created a system of **Accredited Platforms** (formerly known as PDPs - Plateformes de Dématérialisation Partenaires) that sit alongside the public Chorus Pro portal. These platforms handle both the exchange of invoices between businesses and the reporting of transaction data to the tax authority. Belgium's approach is notable because it does not introduce a new category of accredited intermediary. Instead, it builds directly on top of the existing Peppol Access Point infrastructure. The same APs that already handle invoice exchange simply gain an additional responsibility: forwarding transaction data to the tax authority. No separate national platform, no new accreditation regime. This makes Belgium an important test case. If the 5-corner model works well here, it offers a blueprint for other Peppol-centric countries - the Netherlands, Finland, Sweden, and others - to add CTC reporting without dismantling or duplicating their existing network infrastructure.

What has Belgium already done?

Belgium mandated B2B e-invoicing from 1 January 2026 for all VAT-registered businesses. The mandate requires the use of Peppol BIS 3.0, which is fully compliant with the EN 16931 European standard. A three-month grace period ran through the end of March 2026, giving businesses time to adapt their processes before enforcement began in earnest.

This makes Belgium one of the first EU countries to require the Peppol network for domestic B2B transactions - not just cross-border or government procurement. The decision to build on Peppol rather than creating a bespoke national platform has been widely noted, as it sets a precedent for how smaller EU member states can adopt e-invoicing without the cost and complexity of a standalone system.

For a detailed walkthrough of the mandate and its practical requirements, see the Belgium e-invoicing guide.

What is the 5-corner model?

In a standard 4-corner Peppol setup, invoices flow between trading partners via their Access Points and the tax authority plays no part in the exchange. The 5-corner model changes that: Access Points report transaction data to the government automatically as part of the delivery, giving tax authorities a near-real-time view of economic activity. For a fuller explanation of how all the network models compare, see the e-invoicing networks post.

Belgium's planned version builds directly on the Peppol infrastructure that already handles B2B invoicing. No separate national platform is needed - the existing Access Points simply gain an additional reporting duty.

What is Belgium planning for 2028?

The Belgian government has announced plans to introduce mandatory e-reporting using the Peppol 5-corner model, targeted for 2028. Under this system, every B2B invoice exchanged via Peppol would be automatically reported to the Belgian tax authority at or near the time of issuance. The Access Point takes care of the reporting - businesses do not need to submit data separately.

One of the most tangible effects is the planned abolition of the annual VAT customer listing. Because the tax authority will already have transaction-level data flowing in continuously, the annual reconciliation exercise becomes redundant. This removes a significant administrative burden, particularly for smaller businesses.

The 2028 e-reporting layer also aligns Belgium with the broader EU direction under ViDA, which mandates digital reporting for intra-EU B2B transactions from July 2030. By moving to CTC domestically in 2028, Belgium positions itself ahead of the EU-wide deadline.

How does this compare to France's approach?

France's 2026 mandate also uses a CTC model with real-time reporting, but the architecture is different. France created a system of Accredited Platforms (formerly known as PDPs - Plateformes de Dématérialisation Partenaires) that sit alongside the public Chorus Pro portal. These platforms handle both the exchange of invoices between businesses and the reporting of transaction data to the tax authority.

Belgium's approach is notable because it does not introduce a new category of accredited intermediary. Instead, it builds directly on top of the existing Peppol Access Point infrastructure. The same APs that already handle invoice exchange simply gain an additional responsibility: forwarding transaction data to the tax authority. No separate national platform, no new accreditation regime.

This makes Belgium an important test case. If the 5-corner model works well here, it offers a blueprint for other Peppol-centric countries - the Netherlands, Finland, Sweden, and others - to add CTC reporting without dismantling or duplicating their existing network infrastructure.

What should businesses in Belgium do now?

If you are already compliant with the January 2026 B2B e-invoicing mandate, you are in a strong position. The 5-corner model adds a reporting layer on top of what your Access Point already does - it is the AP that submits data to the tax authority, not your finance team. The day-to-day process of sending and receiving invoices should not change from the business's perspective.

That said, not all Access Points will be equally prepared. When the technical specifications for Belgium's 5-corner implementation are finalised, some providers will move faster than others. If you are evaluating providers now - or considering switching - it is worth asking about their CTC readiness and whether they are actively participating in the Belgian government's consultations on the 2028 framework.

Keep an eye on the timeline as it develops. The vendor directory can help you identify providers with the right capabilities, and the Belgium country page will be updated as the government publishes further details on the e-reporting specifications.