is it obligatory upon me to give khums? I am a student, I have some savings. On the other hand I'm earning income through giving tutions. So should I pay khums?

Khums is on savings at the end of the year. So if anything is left on your khums date, you have to give 20% otherwise no. Example if u pay your educational expenses even a day before your khums date and nothing is left as savings, no khums.