Important note
This calculator is an estimate for general information. Actual returns can vary and may include fees, tax, inflation and market risk.
Compound Interest Calculator
Estimate how savings could grow with monthly contributions and compound returns.
Keep exploring this topic
Use the related tools and guides when the first answer raises the next question.
Formula idea
Compound growth adds interest or return to the balance, then future growth is calculated from the larger balance. Contributions add another layer because each deposit has its own time to grow.
Example
Try the same monthly contribution for 5, 10 and 20 years. The longer timeline usually changes the result more than people expect because earlier growth can keep compounding.
Common mistake
A fixed return rate is only an assumption. Real investments can rise and fall, and fees, taxes and inflation can reduce the useful value of the result.