I have a residence document for another EU country

Fairwork Belgium: Working in Belgium

There is no residence permit issued by another EU country that gives you automatic access to the Belgian labour market. If you have a residence permit from another EU country, then it is possible for an employer – under certain conditions – to apply for a single permit for you. Once this application has been approved, you can come to work and live in Belgium. If you have a residence permit marked “EU long-term resident”, there are more advantageous conditions, but you still need a single permit issued by the Belgian authorities to be able to work in Belgium.