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Belgium - New Guidance Clarifies Invoice Rejection, Reverse Charge Treatment, and Delivery Monitoring

Belgium has issued a crucial operational update to its mandatory B2B e-invoicing regime, which is set to fully roll out by 2026.

This update marks the first refresh of the official Frequently Asked Questions (FAQs) since the January 1 go-live date, providing clarity and addressing common concerns in the realm of digital invoicing.

The revised guidance from the Federal Public Service (FPS) BOSA introduces seven new questions while updating two existing entries. The emphasis is largely on accounts payable (AP) and accounts receivable (AR) processing controls, as well as Peppol network management, which are vital for businesses navigating the complexities of e-invoicing.

Peppol Delivery Delays Acknowledged

One of the significant confirmations in the updated guidance is that Peppol’s infrastructure does not guarantee real-time invoice transmission. Businesses may experience delays stemming from various sources, including access points, ERP integrations, and internal processing systems. To mitigate potential issues, the FPS recommends that companies investigate invoices delayed by more than one working day by contacting their software providers or Peppol access points. This acknowledgment aims to set realistic expectations for businesses, thereby encouraging proactive engagement in resolving any bottlenecks.

Reverse Charge Invoice Validation Softened

In a notable shift regarding reverse charge invoices, accounts payable teams are now advised against outright rejecting invoices that lack the specific wording outlined in Royal Decree No. 1, Article 20, § 3. Instead, as long as the general "reverse charge" wording remains present elsewhere on the invoice, businesses can no longer classify such omissions as grounds for hard rejection. This adjustment allows organizations to move these cases into a warning or follow-up process instead of issuing complete rejections, streamlining operational efficiency and improving supplier relations.

New Rejection Process for Incorrect Recipients

The updated guidance also introduces a new protocol for handling invoices not intended for the recipient. Businesses are now required to reject these invoices using a Peppol Invoice Response with rejection code "RE." Furthermore, suppliers who mistakenly issue invoices to the wrong recipient are mandated to include the transaction in VAT reporting before addressing the error via a credit note. This clarification helps maintain compliance with VAT regulations while ensuring accountability in the invoicing process.

Self-Billing Registration Clarified

In another crucial update, Belgium has clarified that it is the suppliers and not the customers who must register within the Peppol framework to receive self-billing invoice document types. Existing contractual obligations between the involved parties remain unchanged, but this clarification underscores the importance of understanding roles and responsibilities in the e-invoicing landscape.

Clarification on E-Invoicing Requirements

  • Q: Does the new e-invoicing requirement apply to transactions outlined in Articles 12 and 19 of the VAT Code (disposals and first occupations)? A: No, it does not. There is no invoicing requirement for these transactions, meaning there is no obligation to issue structured electronic invoices. However, a special document as specified in Article 3 of RD No. 1 must still be prepared for these transactions.
  • Q: Which Tax Category Code should be used for special VAT schemes (such as margin schemes or recovered products)? A: The ‘Business Expert Group on E-invoicing’ (BEG) has provided guidance on this matter, including specific examples. 
  • Q: What is the minimum information required for an invoice to comply with Belgian law? A: The ‘Business Expert Group on E-invoicing’ (BEG) has addressed this issue with examples as well.

More information is available on the BEG website.

Conclusion

These updates reflect a significant shift in Belgium’s e-invoicing compliance landscape, moving from a focus on legal interpretation towards practical operational execution. Businesses must now reassess their AP validation rules, invoice rejection workflows, Peppol delivery monitoring, and ERP master data controls to align with Belgium’s evolving digital VAT framework. The new guidance serves as a reminder that thorough operational awareness is critical to maintaining compliance in an increasingly digital invoicing environment.

In summary, organizations are encouraged to stay vigilant and adapt their processes accordingly to ensure ongoing compliance while fostering smoother interactions with suppliers within the scope of Belgium's digital VAT transformation.

How Can KGT Support You?

KGT has created an SAP-integrated e-invoicing add-on solution for Belgium, featuring outbound and inbound functionalities to meet tax reporting requirements. This add-on includes a data extractor and a cockpit for generating periodic electronic invoices in the legal format and controls before submission. When SAP DRC launched a Belgian e-invoicing solution as part of its e-document offerings, KGT emerged as a leading consultancy firm for SAP DRC and tax services. Recognized as an SAP DRC partner for Belgian e-invoicing services, KGT is one of SAP's recommended implementation partners for this solution. We provide comprehensive support, including installation, configuration, customization, and training, to help you maximize the long-term value of your SAP DRC investment.

KGT is a SAP partner for PE services and SAP Build partner, and to become an SAP partner, strict due diligence requirements must be met, including having certified SAP consultants. You can find us at: https://partnerfinder.sap.com/profile/0001925409

 

 

Country update for Belgium
18 May 2026
Stay informed about the latest indirect tax developments in Belgium, including regulatory changes, compliance requirements, and indirect tax guidance affecting businesses operating locally and cross-border. This page provides a structured overview of country-specific updates, such as new legislation, reporting obligations, digital tax initiatives, and implementation timelines.
These insights help tax, finance, and compliance professionals anticipate regulatory changes, adjust processes and systems, and maintain compliant operations in Belgium.