How to use this calculator
Compound interest is the growth that happens when earnings begin earning their own earnings. This calculator estimates how an initial balance and regular contributions may grow over time using an annual return assumption. It is useful for savings goals, retirement planning examples, and comparing the effect of starting earlier.
Example estimates
A $2,000 starting balance with $300 monthly contributions for 10 years at a 6% annual return may grow to more than $52,000.
Starting five years earlier can make a large difference because the account has more time to compound.
Frequently asked questions
Is the return guaranteed?
No. The annual return is only an assumption. Real savings and investments can perform differently.
Does this account for taxes or inflation?
No. It shows a simplified future value before taxes, fees, and inflation.