Here’s something most adults wish someone had told them when they were young: time is the secret ingredient in building money. Not a huge salary. Not winning anything. Just time.
The reason is something called compound interest. It’s when your savings earn interest, and then that interest earns interest on top of itself. It sounds small at first, but over years and decades it becomes exponential — meaning the growth accelerates. One personal finance guide for teens illustrates the idea this way: if you invest $100 a month starting at 16 with a 7% average return, you could end up with roughly $450,000 by age 65. Wait until 25 to start, and that number drops substantially — even though you’d only be nine years behind.
That gap is huge. And it’s not because 25-year-olds are bad at saving. It’s just math. The earlier money goes in, the longer it has to grow.
You don’t need a lot to get started. Even the smallest amounts add up over time. If you earn $10 an hour working five hours a week, that’s about $200 a month. Save even a fraction of that consistently and you’re already building a habit most people your age haven’t started.
The Consumer Financial Protection Bureau recommends keeping savings in a federally insured bank or credit union — somewhere safe where your money won’t disappear. They also suggest thinking about building up to three months’ worth of expenses as a goal, and figuring out how much to set aside from each paycheck to get there.
If you’re under 18, keep in mind that most banks and credit unions require a parent or guardian to co-sign when opening a savings or investment account — so looping in a trusted adult is part of the process, not just a suggestion.
So even if you’re working a part-time job and feel like there’s nothing worth saving, think again. Starting now — even with $25 a month — puts you years ahead of your future self.