A comparative calculation is performed for persons who are employed for fewer than 9 months a year or who work less than 50% of the normal working hours. 
 If the earned income amounts to less than 50% of the contributions owed as a non-working person, the person will be deemed to be non-working and accordingly pays the contributions as a non-working person. The contributions from employment can be offset. 
 Students who are not gainfully employed pay the minimum contribution (CHF 514.-) until the end of the calendar year of their 25th birthday. Then the ordinary rules (for non-working people) apply to them. 
More details
Leaflet 2.03 - Non-employed contributions to Old-Age and Survivors' Insurance (OASI), Disability Insurance (DI) and Income Compensation Insurance (IC)
              
 
       
               
               
               
                   
               
                