When he turns 18, he will be able to renew his family permit for the same duration as yours if he remains financially dependent on you.
How long is my son’s family visa valid for if I obtain an elective residence visa of Italy?
I understand that if I obtain an elective residence visa of Italy, my 16-year-old son will be able to join me by applying for a family visa. How long is this visa valid for? Does he lose his eligibility to live in Italy when he turns 18?
Minors who apply for and obtain a family stay permit as dependents of an elective residence visa and residence permit holder, once they turn 18 are entitled to have an extension of their family permit. The extension will have the same duration of the stay permit of their parents. After that, they will need to secure their own stay permit. For instance, they can obtain a study permit or a work permit if they find a job in Italy.