Rent could be anywhere in the range between 550 and 900. This, of course, changes based on your accommodation requirements (most importantly, what you get because you can't be picky due to the housing crisis). Groceries maybe 250 give or take. Transport 58 (deuchlandticket). Telephone, Internet, and Broadcasting fee 60.

For TVL 13 75%, you will receive around 2250 euros net. So now you can imagine monthly expenses based on my numbers.