All students in Germany under 30 (with some exceptions) must have German public health insurance (gesetzliche Krankenversicherung). The premium is set by law at the same base rate — around €123-130/month for students as of 2026 — so the decision between insurers is about service quality, additional benefits, and how each handles specific situations you’re likely to face.
The Base Premium Is Not the Full Story
Every public insurer charges the same base contribution rate (14.6% of income, with a student cap of ~€123/month). The difference comes from the Zusatzbeitrag (supplementary contribution), which varies by insurer. In 2026, TK charges around 1.8%, BARMER around 2.19%, AOK varies by regional branch. On a student income cap, these differences are small in absolute terms — often under €5/month.
TK (Techniker Krankenkasse)
The most popular choice among international students and young professionals, for consistent reasons. TK has English-language customer service (a real differentiator), a well-rated app, fast claims processing, and a robust bonus program (Bonusprogramm) that pays cash back for preventive health activities — gym memberships, checkups, screenings. Students in online communities regularly report getting €150-270 back annually through the bonus program.
Limitation: TK has slightly fewer regional offices than AOK, which matters if you prefer in-person service.
BARMER
Strong alternative to TK, with similarly good digital tools and a comparable bonus program. BARMER has historically been strong in mental health resources — they cover more therapy sessions than the statutory minimum in some regions. If you anticipate needing psychological support (common during the stress of a German master’s program), BARMER’s mental health coverage is worth checking specifically for your city.
AOK
The original public insurer, organized regionally (AOK Bayern, AOK Rheinland, etc.). AOK has the densest network of physical offices in Germany — if you’re in a smaller town or prefer handling things in person, AOK is often the most convenient. Digital service has improved but lags TK and BARMER in app quality. The Zusatzbeitrag varies significantly by region.
What Actually Matters in Practice
For most students, the decision comes down to: Do you want English-language support (TK wins)? Are you specifically interested in mental health coverage (BARMER, check your region)? Do you want the densest in-person office network (AOK)?
Coverage for basic healthcare is essentially identical across all public insurers — doctors accept all Krankenkassen equally. The difference is customer service experience and the extra benefits programs that can pay back several hundred euros per year if you use them.
