These are the monetary contributions that employers must make to social security.[1]​.

In contributory social security systems - that is, financed through contributions - financing is usually made up of two fundamental parts: on the one hand, workers' contributions (which are deducted from their salaries), and on the other hand, employer contributions, which correspond to their employers. According to the rate of employer contributions in relation to that of personal contributions (of workers), it is possible to establish the respective participation of the capital factor and the labor factor in the financing.[2]​ In some contributory systems there is a third part of financing corresponding to the State, which is called budgetary financing.

• - Social security.

• - Retirement.