The salary specified in the employment contract is usually specified in the gross amount. However, the amount the employee receives is actually much lower. Why is this happening? Well, the remuneration is reduced by social security contributions, health insurance and income tax. ZUS contributions are deducted from the salary in order to ensure social security. Social insurance covers old-age insurance, disability insurance, sickness and maternity insurance (sickness insurance), and insurance against accidents at work and occupational diseases (accident insurance).
In order to determine the net wage (payable) as mentioned above, the relevant social security contributions must be deducted from the employee's income. However, not everyone knows that only some of them are financed from his salary. The contributions paid by the employer do not matter. They are only determined on the basis of gross salary, and the employer pays them from his own funds.