Future Value of Monthly Contributions
Calculate how much a series of regular monthly contributions will grow over time with compound interest.
How to use this tool
- Enter monthly contribution, annual return rate, number of years and initial lump sum in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your future value and the full breakdown beneath it.
See the power of compound interest on regular savings. Even modest monthly contributions grow substantially over decades.
Frequently asked questions
- Does this assume end-of-month contributions?
- Yes, this uses the future value of an ordinary annuity (end-of-period payments). For beginning-of-month contributions, your actual result will be slightly higher.
- What return rate should I use?
- Historically, a diversified stock portfolio has returned about 7-10% annually before inflation. Use 5-7% for a more conservative, inflation-adjusted estimate.