If you want to leave your full time job to become a freelancer, your visa situation can become tricky. This guide clarifies some common questions people have when making the transition.
First, your current visa might allow you to freelance. On your residence permit (Aufenthaltstitel), look for a line that says "Selbständige Tätigkeit gestattet" (self-employment allowed). If your residence permit has that line, you can freelance or start a business in Germany. This would allow you to find clients and build your business before you quit your full time job. However, your job should still be your main source of income.
Second, your work visa is only valid as long as you are employed by the company that sponsors it. This means that if you quit your job, your work visa expires. Even if that visa allowed you to freelance, it's not valid anymore, so you can't freelance until you get a new visa.
Third, you can't have a freelance visa and a work visa at the same time. You can't get a freelance visa, then quit your job. The German freelance visa will replace your current visa. The moment you get the freelance visa, you are not allowed to work at your old company anymore.
Fourth, you must inform your health insurance company. This is very important. Freelancers are charged differently. Your health insurance will be more expensive, because your employer does not pay half of it.
How to get a freelance visa?
Read how to get a German freelance visa and how to start a business in Germany.