Compound Interest Calculator
See how an initial amount and recurring contributions could grow over time at a chosen rate and compounding frequency.
Your savings assumptions
How this estimate works
The calculator assumes a constant annual rate, a fixed compounding frequency and a recurring contribution made once per compounding period. Real savings or investment products can have changing rates, fees, taxes and different contribution timing.
Important assumptions
This is a mathematical scenario, not a forecast or investment recommendation. Use the actual terms of a product for a decision.
The result separates your contributions from the estimated interest so the effect of compounding is easy to understand.
Frequently asked questions
What is compound interest?
Compound interest means growth is applied to the existing balance as well as to new contributions, according to the compounding frequency used.
Does this calculator guarantee investment growth?
No. It is a mathematical projection using the return assumption you enter and does not predict future market performance.
Do regular contributions change the result?
Yes. The calculator includes recurring contributions, so changing the contribution amount or frequency changes the projected value.