My wife and I have four children - age 16-21 years. The oldest is our son, who is the 21 year old. While he was away in college/university, we did not charge room and board. (He boarded at home.) We felt that we should support him, since he was paying for his own education. The oldest child has now completed his program/degree, and is still living at home with us. He has a full-time job, and it seems that he has more funds than we do. I have returned to full time study (for the past 3 years studying theology) and my wife works part-time. Our funds are rather limited, and it has been tight. My wife and I have been discussing charging room and board, since it seems that our son spends his money on whatever he desires. Should we charge him room and board? Yes or no? What is a fair rate, if yes? Any input would be appreciated.