http://wikiless.i2p/wiki/Payroll_taxes?lang=en
For employees with a salary higher than the minimum wage (16.200CZK in 2022, approximately 660EUR), 9% pay the employers, and only 4,5% pay the employees. Trade license workers pay it themselves. Categories that do not have to pay health and social insurance are, for example, students or people registered at the unemployment department.