My parents never asked me for a dime, charged me for anything or even wanted me to pay any sorts of money at home. We were always super close and instead of spending money at home I had the chance to save my money, focus on other things and did not get the financial pressure to pay rent or other payments at home. Now, as a dad of two boys, I can tell that I would never ask them to pay any sorts of rent or anything. I think when you are close to your family and share your money, help each other out and just be there for each other in any situation you don’t need to charge someone. Yes, there are kids out there who are still living with their parents although their age is above 25 and they are financially secure. I think in that situation, if you are close to your family, you support them on your own if you see the need. If their income is enough and they don’t need your share to survive and don’t ask you for it, be smart. Build up savings and plan your future. Don’t just waste your income.
My personal opinion is that parents shouldn’t charge their children, unless there is a reason for it. If your son is 25+, just sits at home without any sorts of motivation and drive to get on his on feet, well, maybe charging him would put some pressure on him to get going. But, on the other hand, it causes your relationship to fall apart. It will definitely cause some sort of tension. I would say it always depends on the family and the relationship between parents and children. Is it worth it to destroy that over money? Do you need the money? Is it just to show that you are in charge?