Everything you need to know about the Belgium eInvoicing mandate
Is your business ready for the Belgium eInvoicing compliance deadline? Read our blog to get all the essential info ahead of January 2026.
Everything you need to know about the Belgium eInvoicing mandate
New compliance requirements for Belgium eInvoicing are fast approaching.
From 1st January 2026, most Belgian VAT-registered businesses will be required to issue and receive electronic invoices for B2B transactions. In order to comply, affected businesses will need to get set up with a Peppol connection. To avoid the internal headache, this can be implemented via a Peppol Access Point Provider.
Transalis Peppol Access Point
Let us do the legwork for you with Belgium Peppol compliance. We are an accredited Peppol Access Point provider and can ensure you meet the requirements ahead of the deadline.
In this blog we outline:
- Information about the compliance timeline
- Who needs to comply
- How to meet the Belgium eInvoicing requirement
The Peppol Belgium timeline
This eInvoicing mandate is part of a phased plan to modernise VAT reporting and close Belgium’s VAT gap (estimated at €4.8bn).
Similar to other European territories, the Belgian government is implementing these requirements in a phased approach. So far, this has been broken down into two stages:
- January 2026: Mandatory B2B eInvoicing between Belgian VAT-registered businesses with a fixed establishment in Belgium. Invoices must be exchanged in a structured format according to the Peppol BIS 3.0 standard
- January 2028: Real-Time Reporting (RTR). Requiring the electronic submission of key transaction data to the Belgian tax authority, which will replace the current annual VAT client listing.
Who needs to comply with eInvoicing in Belgium?
Put simply, The 2026 Belgium eInvoicing mandate will apply to all businesses established in Belgium and registered for VAT (including foreign businesses with a fixed establishment in Belgium).
It’s also worth noting that B2C transactions and international invoices remain outside the mandate. However, businesses should stay alert for updates ahead of the 2028 eReporting rollout, which could expand the scope of the compliance requirements.
Summary of key requirements
So, what do businesses need to do and what processes must change? We list the key information below:
- Issue and receive structured electronic invoices in the Peppol BIS format
- Exchange invoices via the Peppol network (4-corner model)
- Discontinue the use of PDFs and paper invoices for domestic B2B transactions
- Ensure systems meet technical criteria around authenticity, data integrity and readability
Currently, the 2026 model is based on the 4-corner Peppol approach (supplier and buyer message exchange via Access Points). However, this will change in 2028, as the introduction of the eReporting model will evolve to the 5-corner Peppol setup. This is because the 5-corner Peppol approach supports the RTR to the Belgian tax authority.
How Transalis can help?
Transalis is a certified Peppol Access Point and already supports clients across Europe with compliant eInvoicing and eReporting solutions.
Our cloud-based platform helps you automate invoice exchanges, validate documents, and ensure full compliance with eInvoice and RTR mandates, without the need to setup and manage in-house. Whether your business trades solely in Belgium or internationally, our flexible solutions ensure your eInvoicing workflows meet legal, technical and business requirements.