When someone negotiates a 60% or 80% contract in Switzerland, they usually think of something quite simple: fewer hours, less salary, more free time. Until then, everything is correct. The problem is that the pension percentage does not remain in the payroll. It has a direct impact on three key pillars of the Swiss system: pension, accident insurance and unemployment. And some of those consequences are not recovered later.
The second pillar, the pension fund according to the Federal Professional Pension Law (LPP), has a minimum access threshold. In 2026, only those who earn more than CHF 22,680 per year with the same employer make mandatory contributions. What happens in practice? That a contract at 30% or even 40% in many sectors falls short. Result: you work, but you do not accumulate anything in the second pillar. In the long term, that translates into real gaps in retirement. And no, it is not a minor detail. The reform that was intended to correct this was rejected in the Referendum on the reform of the LPP in September 2024, so the system remains the same. As always, the impact falls most on those who work most part-time, especially women.
Another point that many discover late: accident insurance. According to the Federal Accident Insurance Law (LAA), if you work less than 8 hours a week for the same employer, you are not covered for non-occupational accidents. That is, you break your leg skiing or cycling on the weekend and the accident insurance company does not intervene. Only your health insurance (LAMal) enters, with deductible and co-payment. If you have several mini jobs, be careful: the calculation is done by employer, not by total sum. This is where more than one person is surprised.
Regarding unemployment, the Swiss logic is quite straightforward. Unemployment is calculated on what you earn. If you work at 50%, you contribute as such and get paid as such. If you have several jobs and lose one, only that percentage is taken into account. There is no magic or global compensation. The system is consistent, but it is not forgiving.
None of this means that part-time work should be avoided. In many cases it is a good solution. But it's a good idea to know exactly what it entails before you sign, not when it's too late. Because in Switzerland, as almost always, the technical detail is what makes the difference.