An employer has told me that I have to pay extra health and social insurance from my monthly salary in order to be entitled to medical care. Is this true?
These fees are paid by both the employee and the employer. In total, 34% of gross wages accounts for contributions, but only 4.5% of gross wages is deducted for health insurance and 6.5% for social insurance. You can find out the specific amount of your salary contributions at one of the on-line payroll calculators (https://portal.pohoda.cz).
An employer has no right to deduct money from an employee’s salary above the limit set by the state.