Hear about the next change to Belgium's e-invoicing rules from us, not from a rejected invoice.

Belgium's rules were still changing in the last days before e-invoicing became mandatory on 1 January 2026, and they've changed since. When we find a change that affects one of your invoicing functions, we email the person on your team who looks after it, with what changed for them and where it says so.

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Two colleagues reviewing a page of figures at a long table in an office with a brick wall.

33 sources: we read every week
8 changes we've counted since 1 January 2024: to Belgium's e-invoicing rules

A real example from February 2026

On 20 February 2026, seven weeks after go-live, Belgium published a law, and the three rules we count in it took effect that same day. We count it as one change, and it touches three of your invoicing functions at once.

Belgian Official Gazette of 20 February 2026: the law in Dutch and French, ejustice.just.fgov.be

Invoicing functions
	3 rules
Outbound invoicing		3
Inbound invoicing		1
Connectivity		0
Tax engine		0
Master data		2
Archiving		0
Total work items		6

Each filled square is a rule that affects that invoicing function.

1 Foreign VAT-registered companies leave the obligation

What in this rule affects your outbound invoicing

Foreign companies that are VAT-registered in Belgium but have no establishment there are taken out of the obligation, so the law no longer requires you to send an e-invoice to a customer of that kind. If you are a foreign company that is VAT-registered in Belgium but has no establishment there, the law no longer requires you to be able to receive e-invoices from your Belgian suppliers. Which of your customers are in that group now decides who the obligation covers, so your records of them matter.

Three invoicing functions had something to check

One change, published on 20 February

3 rules in it
Together they affect 3 invoicing functions
6 work items to check or prepare, one for each rule and function it touches

A change like this moves who owes what, and you only know your own position has changed if you know the change exists.

We read the Belgian law in the tax administration's published copy, not the official gazette, and check it against the gazette's record of which acts amended which articles. That confirms what changed and when, not that every sentence matches the gazette word for word; closing that gap is work, not money.

What we see in Belgian e-invoicing

The rules kept moving until days before go-live

Belgium was still changing its e-invoicing rules in the last days of 2025, just before the mandate began on 1 January 2026, so companies had to get ready against rules that hadn't settled.

Eight days before go-live, on 24 December 2025, a royal decree on issuing the farmers' purchase note in structured electronic form was published in the gazette (ejustice.just.fgov.be)
Two days before, on 30 December, a law amending the VAT code was published (ejustice.just.fgov.be)
And on 31 December, the day before, another royal decree was published, amending royal decree no. 1 on VAT (ejustice.just.fgov.be)

We expect the rules to change again

We've counted 2 changes to Belgium's rules since go-live on 1 January 2026, so we expect more, though we can't tell you when.

Seven weeks after go-live, on 20 February 2026, the gazette published a law that changed the e-invoicing rules (ejustice.just.fgov.be)
In May, Belgium's tax administration added to its e-invoicing FAQ that an invoice sent to the wrong address is rejected over the network and not booked (efactuur.belgium.be)
Outside our count, two new versions of Peppol's invoice format became mandatory in Belgium in 2026, 3.0.20 on 23 February and 3.0.21 on 17 August, and a new format version is one way an invoice that went through before could stop validating (docs.peppol.eu)

We expect further changes to Belgium's rules to arrive.

Changes come from more than one place

Belgium's rules come from Parliament and the government through the law, published in the gazette in Dutch and French, and from the tax administration, which answers questions on its own site, each on its own calendar.

We've counted 8 changes since 1 January 2024, and this is where each of them came from.

7 through Parliament and the government
1 from the tax administration

Of the 2 changes since go-live, 1 came through the law, so anyone watching only the law would have missed 1 of them.

A change can fall between the people you rely on

In Belgium your invoices move through the software and providers you chose, and each of them is likely to look after only its own part.

Your platform provider, the one that connects you to the Peppol network, is likely to keep that connection current, your software vendor to update its software, your ERP partner or group IT to look after its part and your accountant to know the tax, and it may be nobody's job to check that it all still fits

So checking that a change has reached all of it is likely left to you.

We keep your invoicing teams up to date. Free onboarding, then €450 a month.

After your first message, we send you a form, about an hour's work, where you tell us who looks after each of your invoicing functions.
We then have a short call with whoever signs off on your side, so they know what each person will hear from us and what we don't do.
When we find a change, each person it affects hears from us what to check or prepare, and where it says so. We keep a record of each change we find and who we sent it to, so it never rests on one person remembering.

Get started

What we don't do

Give legal or tax advice. What we send is our reading of what a change means for your invoicing, with the source beside it so you can check it.

Look beyond our sources. We read 33 of Belgium's sources every week, and we tell you about the changes we find there and nowhere else.

Decide for you. What to do about a change, and when, stays with you and the people who look after your invoicing.

Get started, or tell us how you keep up today

Jens Anttila

jens@einvoiceops.eu

Tell us who looks after your invoicing today, and whether that's one person, several, or a team for each function.