Partial old-age pension
Partial old-age pension is possible from the age of 61. The amount of pension that can be taken out is 25 or 50 per cent of the employee's pension earned by the end of the previous calendar year.
If the pensions is taken out early, i.e. before the lowest possible retirement age for the relevant age group, that part of the pension is permanently reduced by 0.4 per cent for each month. Example: the lowest pensionable age for persons born in 1955 is 63 years 3 months. If a person born in 1955 takes out early old-age pension from the beginning of the calendar month that follows his/her 62nd birthday, the reduction will be 15 (months) x 0.4% = 6%.
The partial old-age pension does not require working,
More on partial old-age pension (pdf)