If you hold an EU Blue Card, you will be issued a permanent settlement permit upon application subject to the following requirements:
If you have sufficient command of the German language, the period will be shortened to 21 months of employment.
Basic knowledge of the German language corresponds to Level A1 of the Common European Framework of Reference for Languages (GERR).
Sufficient command of the German language correspond to level B1 of the Common European Framework of Reference for Languages (GERR).
For more information, please read the leaflet “Information on adequate health insurance” (section “Forms”).
More on the topic in the section “More information”.
Source of Information :