Compound Interest Calculator

Calculate how your investments can grow over time with compound returns.

Investment Compound Interest Calculator

This compound interest calculator helps you estimate how your investments grow over time. Enter a starting amount, monthly contribution, annual return, and fees to project your future investment value.

What can you calculate?

Why this matters

Compound growth is one of the most powerful drivers of long-term wealth. Even modest monthly contributions can grow into substantial amounts over time when investment returns are reinvested.

Your current invested balance.
How much you invest each month.
Future value
Total contributions
Investment growth
Net annual return after fees
Portfolio value Growth line
Show yearly breakdown
Year Total contributions Portfolio value Growth

Disclaimer: Educational estimate only. Not financial advice. Results do not include tax or personal circumstances.

Frequently Asked Questions

What is compound interest?

Compound interest is the process where your investment earns returns, and then those returns also begin earning returns. Over time, this creates accelerating growth.

How does this compound interest calculator work?

This calculator applies a monthly growth rate based on your annual return minus annual fees. It then adds your monthly contribution and projects the portfolio value over time.

Does this calculator include investment fees?

Yes. Annual fees are subtracted from the annual return to estimate a net annual return before compounding.

Is this for loans or investments?

This page is designed for investment growth, not loan repayment. It helps estimate how invested money can compound over time.