7 in 10 Belgian companies have not yet adopted e-invoicing

Belgian companies still have a long way to go to be ready for mandatory electronic invoicing by 1 January 2026. As shown in the results of our third BDO Company Barometer. 

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.” 

Putting processes in place 

That leaves 70% of companies that have not yet got their e-invoicing on point. How far along are they? A quarter already indicate that they may not be ready today but are on track to meet the deadline (<5 employees: 18%; 6–50 employees: 23%; and >50 employees: 31%). 17% indicate that their processes still need to be adjusted. In this area, large companies (>50 employees: 12%) are significantly ahead of the smaller players (<5 employees: 24%; 6–50 employees: 28%).  

“That isn’t so surprising when you know that the challenges for larger companies are a lot more extensive and often more complex. They work with PO numbers, budget codes, and so on, which means that every single detail has to be in order. That is why we at BDO also take a holistic approach – from an analysis of the current invoicing process, to choosing the right solutions and security measures, to redesigning internal processes,” explains Joyce Martens. 

Choosing the right system is challenging

Besides processes, there is, of course, the issue of systems. On that front, 8% of companies are going to put their house in order in the coming months. This topic is highest on the agenda among medium-sized companies (6–50 employees: 10%; <5 employees: 3%; and >50 employees: 7%). 

A potential pitfall when implementing e-invoicing is the choice of an ‘access point’, the system through which companies receive and send invoices to other companies or other access points. It is very important for companies to choose an access point that matches their type of activity as well as the planned evolution of the company. And with more than 100 providers to choose from, with very different pricing, that can be quite a challenge. Companies also best not wait too long to delve into this because the closer we get to the deadline, the greater the demand is going to be, potentially putting us in a ‘first come, first served’ scenario. And that is where the issue is for a lot of companies, as 10% indicate that they have not yet started preparing for e-invoicing.  

Return on investment 

Although the preparation process towards e-invoicing is often underestimated, companies are well aware of the impact. For example, 34% of business leaders point towards 
e-invoicing as the most impactful obligation (relative to other regulations, such as those around ESG or AI, for example). In doing so, a third (33%) also indicates that it comes at a heavy cost and that they would rather spend that budget on something else.  

Pascal Dauw, Partner Tax: “Of course, it will take some time for the investments in e-invoicing to start paying off – and that will certainly not be the case during the transition phase – but in the long run, it will mean more cost-efficient operations. The shoeboxes of documents dragged to the accountant around quarterly returns will be relegated to the past.  And for smaller businesses that are wary of the investment, there is a temporary increased cost deduction of 120% for the non-activated costs associated with e-invoicing (e.g. subscription costs for an invoicing package, consultancy costs incurred specifically for the preparation or implementation, etc.). In addition, small businesses also enjoy a 20% investment deduction on digital investments, such as software for an invoicing solution.”

Jo Heijse, Partner BDO Digital: “In practice, we often see companies underestimating the scope of e-invoicing. There is obviously a big digital component, but, in addition, there is also a tax aspect, for example, and obviously a lot of process impact. Many companies mishandle this. So those who do not yet have a concrete plan for implementation are really down to the wire.”  

Return on investment 

Although the preparation process towards e-invoicing is often underestimated, companies are well aware of the impact. For example, 34% of business leaders point towards 
e-invoicing as the most impactful obligation (relative to other regulations, such as those around ESG or AI, for example). In doing so, a third (33%) also indicates that it comes at a heavy cost and that they would rather spend that budget on something else.  

Pascal Dauw, Partner Tax: “Of course, it will take some time for the investments in e-invoicing to start paying off – and that will certainly not be the case during the transition phase – but in the long run, it will mean more cost-efficient operations. The shoeboxes of documents dragged to the accountant around quarterly returns will be relegated to the past.  And for smaller businesses that are wary of the investment, there is a temporary increased cost deduction of 120% for the non-activated costs associated with e-invoicing (e.g. subscription costs for an invoicing package, consultancy costs incurred specifically for the preparation or implementation, etc.). In addition, small businesses also enjoy a 20% investment deduction on digital investments, such as software for an invoicing solution.”

Jo Heijse, Partner BDO Digital: “In practice, we often see companies underestimating the scope of e-invoicing. There is obviously a big digital component, but, in addition, there is also a tax aspect, for example, and obviously a lot of process impact. Many companies mishandle this. So those who do not yet have a concrete plan for implementation are really down to the wire.”  

Contact our experts below to make sure you are ready for mandatory electronic invoicing by 1 January 2026

Joyce Martens
Joyce Martens
Partner
joyce.martens@bdo.be
Jo Heijse
Jo Heijse
Partner
jo.heijse@bdo.be
Pascal Dauw
Pascal Dauw
Partner
pascal.dauw@bdo.be