Build a first budget for a teenager.
A first budget works best in the order used here: pay yourself first, cover what you have already committed to, and spend what is left. Taking the savings share off the top before anything else is the habit worth building, because saving whatever remains at the end of the month reliably produces nothing. Fixed commitments — phone, transport, club fees — come next because they are not optional once agreed, which is itself a useful lesson about signing up to monthly costs. What remains is genuinely free to spend, and converting it to a weekly figure makes it usable: 143 dollars a month is abstract, 33 a week is a decision you can make on Saturday.
Teen Budget
Savings = income x savings target%; fixed = phone + transport + other commitments; spending money = income - savings - fixed; weekly = monthly / 4.345
Twenty to thirty percent is a realistic target when housing and food are provided. The percentage matters less than the habit of taking it off the top.
Then either the savings percentage or the fixed commitments are too high for the income. Subscriptions are usually the easiest to cut, and seeing that trade-off explicitly is the point of the exercise.