Work & employment
20-hour rule
The 20-hour rule limits enrolled students in Germany to 20 working hours per week during the lecture period. Staying under it preserves student status, the Werkstudentenprivileg social-security exemption, and student health-insurance rates. During semester breaks, students may work full-time.
The 20-hour rule is the central working-time limit for students in Germany. During the lecture period (Vorlesungszeit) you may work at most 20 hours per week across all jobs combined. The logic: your studies must remain your main occupation. Cross the line regularly and the social-security system reclassifies you as a regular employee, with full health, nursing, and unemployment contributions deducted from your pay.
The rule relaxes outside the lecture period. During semester breaks (vorlesungsfreie Zeit) you can work up to full-time without losing student status. Evening and weekend work also enjoys some flexibility: hours worked outside typical study hours are judged more leniently, though the 26-week rule caps how often you may exceed 20 hours per year.
What it means for working students
Track your hours across all employers, not per job: two 12-hour contracts put you over the limit. For non-EU students the stakes are higher, because exceeding 20 weekly hours during lectures can also violate residence-permit conditions, which is a visa problem rather than just a contributions problem. Use a weekly tracker, and front-load heavy work weeks into semester breaks where the limit does not apply.