Compound Interest Calculator with Monthly Contributions

See how your money grows over time with monthly deposits.

Final Balance
$ 0.00
Interest earned: 0.00
Invested: 0.00

Results are estimates and do not account for market risk, inflation, or fees

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What is Compound Interest?

Compound interest is the process where your investment grows over time by earning interest not only on the initial amount, but also on the accumulated interest. This creates exponential growth, meaning your money can grow faster the longer it stays invested.

How This Compound Interest Calculator Works

This calculator helps you estimate how your savings or investments may grow based on your starting amount, monthly deposits, interest rate, and time period. It assumes that interest is compounded monthly and that contributions are made consistently.

Compound Interest Formula Explained

The formula used combines the growth of your initial investment and the future value of monthly contributions. It assumes a fixed interest rate and monthly compounding.

Why Monthly Contributions Matter

Regular monthly contributions can significantly increase your final balance. Even small deposits grow over time thanks to compounding, making consistency more important than timing.

Example

If you start with $1,000 and add $100 every month at a 5% annual interest rate, your balance will grow significantly over time due to compounding. The longer you invest, the greater the effect.

What Affects Your Final Balance?

How Accurate Is This Calculator?

This calculator provides estimates based on a fixed interest rate. Real investment returns may vary due to market conditions, inflation, fees, and other factors.

Who Should Use This Calculator?

This tool is useful for anyone planning long-term savings or investments, including retirement planning, wealth building, or financial goal tracking.

Frequently Asked Questions

How often is interest compounded?

This calculator assumes monthly compounding.

Is compound interest guaranteed?

No. Investment returns depend on market performance and are not guaranteed.

Does a higher interest rate make a big difference?

Yes. Even a small increase in interest rate can significantly impact your final balance over long periods.

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