You are a very low earner if you have a 'mini-job' with a salary of no more than €450 or if you are only temporarily employed. This rule does not apply to trainees and apprentices, however.
Mini-jobs do not incur contributions to health, nursing care and unemployment insurance, but do incur contributions to pension insurance. You can, however, request exemption from pension insurance. To do so, submit an application to your employer.
As a temporary employee, you do not have to pay any contributions in principle if you work as a very low earner for no more than a total of three months within one calendar year. A prerequisite for exemption from contributions is that your employment must be contractually time-limited from the outset. In this case your salary does not matter.
If you have several temporary jobs within a calendar year, these are calculated together. If through several temporary jobs you end up working for more than three months in a calendar year, the same contribution rules apply to you as to regular employees.