Money
Compound interest calculator
Explore how time, regular contributions, and compounding can change a savings balance.
Assumes monthly compounding and contributions made at the end of each month. Taxes, fees, and inflation are excluded.
Projected balance
$27,356.79
After 10 years at an annual rate of 7%.
Total contributed$17,000.00
Estimated growth$10,356.79
Monthly periods120
Illustrative estimate only, not investment advice. Actual returns vary and may be negative.
Plain-language method
Growth earns growth of its own.
Compound interest adds each period’s growth to the balance. The next period then earns interest on both the original money and previous growth.
This estimate compounds monthly and adds each regular contribution at the end of the month.
Future value = principal × (1 + r)ⁿ + contribution × (((1 + r)ⁿ − 1) ÷ r)
Results update instantly and stay on your device. Review the assumptions above before using an estimate for a financial decision.