You may not charge a higher rent to the subtenant then the one you pay to us. If the apartment is furnished, you may add a maximum of 15% to the rent. If electricity, internet etc. are included in the rent when you sublet the apartment, you will only be paid for the costs that you have yourself.
If you chage higher rent from your subtenant than you are entitled to, you risk losing your apartment. In addition, if the tenancy is sublet without an additional rent and with an excessive rent, you risk a fine or imprisonment, as it is criminal from 1 October 2019.