The whole point of investing is to make your money work for you. But it can be hard to visualize what your money will look like in 10, 20, or 30 years. Our investment calculator projects the future value of your investments based on your initial contribution, expected return rate, and regular monthly additions. It is a powerful way to see the long-term impact of consistent investing.

The formula, explained simply

We calculate the future value using the compound growth formula with monthly compounding. Your initial investment grows each month at the annual return rate divided by 12. Your monthly contributions are added and grow alongside it. The result shows your projected balance, how much you contributed out of pocket, and how much came from investment growth. Adjust the return rate to match different asset classes — stocks, bonds, or a balanced portfolio.

When you would use this

Long-term investors map out their retirement trajectory. Young professionals see the power of starting early with smaller contributions. Anyone comparing investment options can model different return scenarios. Parents project college fund growth. It is also a great motivator — seeing the growth column go up over time makes saving feel more tangible.

Frequently asked questions

What is a realistic annual return rate?

Historically, the S&P 500 has returned about 10% on average before inflation. A more conservative estimate would be 6-8% after inflation. Bonds typically return 2-5%.

How does monthly contribution frequency affect results?

More frequent contributions mean more chances for growth, but the difference between monthly and yearly contributions is small over long time horizons.

Does this account for taxes?

No. Investment gains in tax-advantaged accounts (401k, IRA) are not taxed until withdrawal. In taxable accounts, you may owe capital gains tax.

What is dollar-cost averaging?

Investing a fixed amount regularly regardless of market price. Our calculator assumes this approach with monthly contributions.

Can I lose money?

Yes. Investment returns are not guaranteed. Past performance does not predict future results. This calculator shows projections, not promises.