Can my family join me on a Belgian single permit, and will my document match theirs?

Because a single permit authorises you to live and work in Belgium for more than 90 days, your spouse or registered partner and minor children can in principle join you through family reunification, subject to conditions.

Family members generally receive a residence document with the same validity period as yours, which keeps the family's status aligned. Note that family-reunification conditions – such as resources and accommodation – apply and have been tightened in recent years, so it is worth checking the current requirements before applying.