A lot of teens hear the word budget and immediately think it means restriction. What they actually need is a clearer way to think about money before adult expenses start showing up. A simple budget helps them understand that money has jobs, tradeoffs are real, and spending without a plan usually catches up with you.
Parents do not need to turn this into a big finance unit. They just need to teach enough budgeting basics that their teen can look at incoming money, expected costs, and personal spending choices without feeling completely lost.