Moving back home as an adult is no longer unusual. In 2023, 18% of Americans ages 25 to 34 lived in a parent’s home, according to Pew Research Center, and housing costs, job changes, student debt, divorce, and saving for a home can all make returning to the family home financially attractive. For parents, however, opening the door raises an uncomfortable question: Should you charge your adult child rent or give them a financial break? There is no universal dollar amount that works for every household, but there is a useful rule: The arrangement should improve the adult child’s financial position without damaging the parents’ financial security. Done thoughtfully, rent can create structure and independence without turning Mom and Dad into landlords.