One reason adulthood feels overwhelming to young people is that bills arrive before they understand what any of them really mean. Rent, utilities, phone plans, car insurance, subscriptions, and groceries can all feel abstract until money starts leaving an account for real.
Parents can lower that stress by explaining the basic categories early. Teens do not need the perfect adult budget yet. They just need to know that monthly costs exist, due dates matter, and ignoring a bill usually makes the situation worse, not better.