Belgium’s new cross-border worker framework changes what employees must carry, where some workers apply, and how employers should verify mobility status from August 2026. The biggest practical change is for non-EU nationals who live in a neighbouring country but regularly enter Belgium for work: many will now use Annex 64 instead of Annex 15.
The first thing workers should understand is simple: a cross-border work document is not the same as permission to live in Belgium.
Who Counts as a Cross-Border Worker in Belgium?
A cross-border worker lives outside Belgium but works inside Belgium and regularly returns to their main residence abroad. Official Flemish guidance describes frontier workers as people working in Belgium while residing in a neighbouring country such as France, the Netherlands, Germany, Luxembourg or the United Kingdom.
For example, someone living in Lille and working several days a week in Brussels may qualify as a frontier worker. Someone who rents an apartment in Brussels and effectively lives there most of the week may need a normal Belgian residence route instead.
That difference now matters more than ever.
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What Changes for EU Citizens Working Across the Belgian Border?
EU citizens face a simpler process because they no longer need the old municipal Annex 15 procedure for cross-border work. They can generally enter Belgium using a valid identity card or passport and continue exercising EU free-movement rights.
If an EU worker actually moves their main home to Belgium, however, normal Belgian residence registration rules apply. Belgium remains divided into separate regional systems for employment matters, so employers should still identify whether the work takes place in Flanders, Brussels or Wallonia before assuming one procedure fits every case.
Who Needs Belgium’s New Annex 64?
Annex 64 is aimed at qualifying non-EU nationals who remain legally resident in France, Germany, Luxembourg or the Netherlands while working in Belgium.
The document replaces Annex 15 for new qualifying frontier-worker cases and is linked to the worker’s underlying professional authorisation.
| Worker situation | Main document route |
|---|---|
| EU citizen living outside Belgium | No Annex 15 frontier-worker document |
| Non-EU national living in FR, DE, LU or NL | Annex 64 |
| Non-EU national living in the UK | D visa B63 route |
| Existing Annex 15 holder | Transitional protection may apply |
Annex 64 does not itself authorise employment. A worker may still need a valid Belgian work permit, professional card or another recognised basis to perform the activity.
Official Flemish guidance confirms that frontier workers requiring employment authorisation generally need a work permit because the ordinary single permit is designed for workers who reside in Belgium.
Is Annex 64 a Belgian Residence Permit?
No. Annex 64 confirms frontier-worker status; it does not give the holder the right to settle in Belgium.
This is probably the most important practical rule in the reform.
A worker living in Maastricht, for instance, cannot obtain Annex 64 and then gradually start spending nearly every night in Antwerp as if they had Belgian residency. The worker’s principal residence must remain abroad, and the cross-border arrangement must remain genuine.
If someone intends to relocate permanently, they should examine Belgium’s normal residence and employment procedures instead. For long stays, Belgium generally uses a national D visa and residence-permit framework for eligible non-EU nationals.
What Changes for UK-Based Cross-Border Workers?
Workers principally resident in the United Kingdom follow a different route because the UK is outside the EU.
Qualifying non-EU or UK-based frontier workers may need to apply through the competent Belgian embassy or consulate for the dedicated D visa B63 before starting qualifying cross-border work.
The useful planning lesson is straightforward: do not assume the France or Netherlands Annex 64 process also applies to someone living in London.
Employers should establish the worker’s country of legal residence first, then decide which immigration route applies.
Do Existing Annex 15 Documents Stop Working Immediately?
No. Existing Annex 15 holders benefit from a transition rather than an overnight cancellation.
Reported implementation guidance provides a 12-month transitional period for existing frontier workers holding Annex 15, meaning companies should identify those employees now rather than waiting until the document is close to expiring.
The smart HR approach is to create a simple audit containing:
- Worker nationality
- Country of principal residence
- Belgian work location
- Current work authorisation
- Current Annex 15 expiry date
- Whether Annex 64 or B63 will be needed next
That six-line check can prevent a worker from reaching the border with the wrong paperwork months from now.
What Documents Should Non-EU Frontier Workers Prepare?
Workers should prepare proof of both their foreign residence and their legal right to work in Belgium.
Depending on the case, useful documents include:
- Valid passport
- Valid residence permit from the neighbouring country
- Proof that the main residence remains outside Belgium
- Belgian work permit or employment authorisation
- Professional card for eligible self-employed workers
- Posting documents or an A1 certificate where applicable
Employers in Flanders should also remember that the employer—not simply the employee—normally applies for the required work permit.
The Key Rule Employers Should Not Miss
Do not treat “cross-border worker” as a convenient alternative to Belgian residence permission. The new system makes the distinction clearer: frontier status supports workers who genuinely live abroad and cross into Belgium for work.
For employees, the safest habit is equally simple: carry proof of where you legally live, confirm your Belgian work authorisation, and check the correct document before changing your commuting pattern.
That will matter far more than simply knowing that “Belgium changed its rules.”
