Which region's rules apply to my Belgian work permit?

This is the part of Belgium that surprises most people. Residence is decided federally by the Immigration Office, but the right to work is regionalised. Your case is handled by the region of your main place of work: the Flemish Region, the Walloon Region or the Brussels-Capital Region (with a separate German-speaking Community authority). Because each region sets its own conditions and salary thresholds, the same job can clear the bar in one region and fall short in another. Decide early where you'll actually be working, since that single fact determines which authority, thresholds and even language apply to your application.