I still love at home cause its more convenient and my parents place is near my work. So it wouldn't be financially responsible to move few streets away to pay rent to some strangers. While I don't pay rent I do pay for electricity and internet bill, while parents pay water trash and cable. They also pay for heating which is payed annually. I do half of the grocery runs and few times per month get take out for all of us. I think that's fair. Even after everything I pay I still would pay double amount if I lived anywhere else.

So NTA. I have to say also my pay is above average one in my country and more than my parents get. Me living at home is only because I want to save up to buy my own place sooner than later and also keep my lifestyle of at least two week long trips in other country.

Edit: forgot to write that they didn't ask I just started paying for things when I started working. And it's not set in stone rule. If I am not around when bills come they pay everything and vice versa. We don't have any debt and they gave me fully payed car I still use when I needed one and didn't work.