Kids Allowance Savings Calculator
Teaching a child to save part of every allowance builds a habit that lasts. This calculator shows how those small weekly deposits add up. Enter the weekly allowance, the share your child saves, the number of weeks, and an optional annual interest rate. It sums the weekly deposits and, if you add a rate, compounds the balance week by week the way a basic savings account would. The result shows total saved, interest earned, and the final balance. Every input is yours, so the picture matches your family's plan.
Allowance savings method
Weekly savings = allowance * (share saved / 100)
Weekly rate = annual rate / 100 / 52
Each week: balance = balance * (1 + weekly rate) + weekly savings
Interest earned = final balance - total deposited
With a zero interest rate, the final balance is simply weekly savings times the number of weeks.
Money habits for kids
- Saving a fixed share of any money builds a durable habit.
- Watching the balance grow gives children a concrete reason to keep going.
- Match a goal, like a toy or game, to make saving tangible.
- Real account rates change; use a realistic figure or set it to zero.
- Add gifts to the starting balance to see their long-term effect.
Allowance savings: frequently asked questions
How does the allowance savings calculator work?
It takes the weekly allowance, the share your child saves, and the number of weeks, then adds up the weekly savings. If you enter an annual interest rate, it applies that rate weekly so the balance compounds gently over time, the way a simple savings account would.
How is the interest applied?
The annual rate is divided by 52 to get a weekly rate. Each week, the running balance grows by that weekly rate, then the new savings deposit is added. This mirrors how a basic interest-bearing account credits a balance over time, though real accounts vary.
Why teach kids to save a portion?
Setting aside a fixed share of any money builds a lifelong habit. The Consumer Financial Protection Bureau highlights early money habits as a foundation for later financial well-being. Seeing the balance grow gives children a concrete reason to keep saving.
Is the interest rate guaranteed?
No. The rate is whatever you enter, and real savings accounts pay rates that change over time. Use a realistic figure for your account, or set it to zero to show pure saving without interest.
Can I model a one-off bonus?
This calculator models a steady weekly amount. To include a birthday or holiday gift, you can add it to the starting balance field, or run the numbers for the weeks before and after the bonus and combine the totals yourself.
Official sources
- Consumer Financial Protection Bureau: Money as You Grow resources.
- U.S. Securities and Exchange Commission: Compound interest basics.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.