If your business trades in Belgium, mark a date in red on your calendar. The country is joining the European digitalisation wave and saying a definitive goodbye to paper (and simple PDFs) in B2B relationships.
We know full well that tax changes are usually a real headache. That’s why we’ve prepared this quick guide to explain what is going on, who needs to comply, and how to prepare without getting dizzy with technical jargon.
Key Date: 1 January 2026
From this day onwards, e-invoicing will be mandatory for all B2B transactions (business-to-business) in Belgium. The authorities have announced a 3-month grace period (until March 2026). During this quarter, they will be flexible and won’t issue penalties provided you show you are making a reasonable effort to adapt.
But a word of advice: don’t leave it until the very last minute. Three months fly by.
Who needs to comply?
The rule doesn’t apply to everyone equally. Here is a quick filter to find out if it affects you:
- YES, it affects you: If your company is established in Belgium and has a Belgian VAT number. In this case, you will need to be ready to both issue and receive e-invoices.
- NO, it doesn’t affect you (for now): If you sell to final consumers (B2C).
- The important nuance: Companies not established in Belgium (even if they hold a Belgian VAT number to operate there) might be exempt from the obligation to receive e-invoices under the initial rules. However, this is a tricky point worth reviewing with your tax advisor based on your specific situation.
Watch out: No, a PDF is not an e-invoice
This is the most common mistake. From 2026 onwards, simply sending a PDF via email will no longer count as a valid, original legal invoice.
Belgium has adopted the European standard (the Peppol network and the EN 16931 format).
- What does this mean in plain English? It means the invoice becomes a structured data file (like computer code) that travels directly from computer to computer.
- And what about the PDF? You can still use it as a “visual copy” for a person to read, but what will have legal validity before the tax authorities is the structured file.
Your duties depending on your role
- If you are a Supplier (Issuer): You need software capable of generating these invoices in the Peppol/EN 16931 format and sending them via the secure network.
- If you are a Client (Receiver): You have an obligation to be technically prepared to receive these invoices. Be careful, because you cannot reject an e-invoice if you meet the requirements to be within the system.
Why is this actually good news?
Although initially it might seem like just another administrative burden, the reality is that it brings operational advantages:
- Forget about invoices lost in the post or in the spam folder.
- No more manual errors when keying data into the system.
- More agile and automatic collection processes.
Looking to the future (ViDA)
This move is just the first step. Belgium is aligning itself with the European VAT in the Digital Age (ViDA) project. By 2028, the goal is for e-invoicing to be connected to near real-time tax reporting. So, digitalising now isn’t just ticking a box; it’s preparing for what’s coming next.
