Working as an EU/EEA student
Under EU/EEA regulations (this also includes Iceland, Lichtenstein, Norway or Switzerland), you can work up to 20 hours per week alongside studying. If you work longer hours than this, you will be required to pay into the German social security system. This may also have an impact on your studies.
Working as a non-EU student
If you are a non-EU/EEA student, you can work for 120 full days or 240 half days a year alongside your studies. Students working as student assistants or research assistants at BSBI do not need to count this work within the limit. You will need to inform the Alien Registration Office if you do undertake this type of work. It should be noted that non-EU students are not allowed to assume self-employment or take on freelance work.