In order to enjoy social security, you need to pay social contributions. Every self-employed person, whether in primary or in secondary profession, and all companies have to comply with this duty.
You own social contributions for every quarter in which you worked at least one day. You need to pay these contributions every quarter before the set expiration date on 21 April, 21 July, 21 October and 21 January. Paying too late? Then your contributions will increase by three percent.
A direct debit will help you avoid late payments.