OASI contributions for persons in gainful employment amount to 10.6% of their gross income. I was alarmed when I first read this! Then, I found out my employer would be footing half the bill.
OASIcontributions for self-employed persons
Unlike employed persons, self-employed persons must contribute in full on their own, according to their annual earnings. Therefore, OASIcontributions of self-employed persons are more onerousand globally, the contribution rate remains below that of an employed person (10%, compared with 10,6% as an employed person).
In addition, different OASI contributions exist for persons without a gainful activity.
For more information, I would recommend that you go check out directly the website of those who are in charge of your first pillar (https://www.ahv-iv.ch/p/2.03.f).