3. Help track their spending patterns on a regular basis
Lassiter set both of her teenage girls up with a checking account and a debit card. “At the end of the month, we review their statements and they’re almost always shocked by how much they spent,” she says. Make sure you have access to their bank account, Venmo, PayPal, Apple Pay and so on, Lassiter says, and help your teenager clearly see the patterns in their spending. Sit down and make a list of common categories (clothing, food, gas, entertainment, savings) then help them determine where they need to cut back and where they have a bit more wiggle room. “This is the perfect place to give them grace with mistakes,” Lassiter says. “Every mistake is a learning opportunity and you want as many of those as possible now, when the stakes are still low.”
Source: https://www.purewow.com/money/teen-summer-job-money-saving-tips-fidelity