Investment Calculator

Find out how much your money can grow with the power of compound interest if you start investing early.

Your Investment Plan

Initial Investment

How much money you want to start investing with

Please input a value

Monthly Contribution

Amount that you want to add to your investment every month

Please input a value

Years to Grow

Number of years you intend to stay invested

Maximum value is 3050 years

Rate of Return

The average annual rate of return on your investment is

Please input a value


Estimated Investment Value

Your investment growth

Year Beginning Bank Balance Annual Contribution Total Annual Contributions Interest Earned* Total Interest Earned* End Bank Balance
* The annual rate of return is divided into 12 months, with interest earned accrued on a monthly basis.

What is Compound Interest?

Compound interest is the interest you earn on your principal and the interest you’ve accumulated each year.

When you invest your money, you’ll earn interest (or returns) on your money. If you continue to keep your principal and your interest invested each year, compound interest allows your investments to grow even faster over time than if you were to just keep your initial principal invested but withdraw your returns.



This calculator is designed to be an informational and educational tool only, and when used alone, does not constitute financial advice. The Simple Sum is not responsible for the consequences of any decisions or actions taken in reliance upon or as a result of the information provided by these tools. The Simple Sum is not responsible for any human or mechanical errors or omissions that may occur too. Do consult a financial services professional before making any investments.