It depends on what the parents do with it, IMO. My parents charged us all “rent,” till we moved out, provided we had gotten a job to begin with. What we didn’t know is they were just stashing it in a savings account for us, for when we graduated. AFAIK, I got every penny I gave them back in a lump sum. Wish I had been a little smarter with that money, but oh well. Have to have some regrets I suppose.