Permanent residency

i started working in germany since 2021 with a dependant on a student visa. I have now changed my job and will get my blue card.

I also have b1 certificate

when can I apply for a permanent residency? should I wait for 21 month after geting my blue card or does my previous working experience in germany shorten this perio?


Thanks:)

By permanent residency, do you mean "Aufenthaltserlaubnis" or "Niederlassungserlaubnis"?

In any case, for such specific questions you better ask your local foreigner office ("Ausländeramt").