Only a third of companies are already implementing e-invoicing today. A quarter still hasn’t but is on track to meet the deadline. Another quarter has yet to adapt their processes and systems and 1 in 10 has not even started. Remarkably, it is the middle-ranking SMEs that are least advanced in terms of preparation.
Starting on 1 January 2026, the structured electronic invoice will become mandatory in Belgium for all transactions between VAT-registered companies. The trigger is an EU directive requiring e-invoicing in all member states by 2028.
A third of Belgian companies are fully prepared and are already implementing e-invoicing today. This is mainly the case for small players with fewer than 5 employees (38%) and for companies with more than 50 employees (35%). SMEs with 6–50 employees limp a bit behind (24%). Joyce Martens, Partner Accountancy: “Companies of this size have often already become established businesses. This, of course, entails that they are a lot less agile than small start-ups. Then, on the other hand, the bigger players have an internal team that tackles topics like e-invoicing to make sure everything is on point by the deadline.”

