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Investment Return Calculator (ROI)

Written by Calcida Team
Reviewed for accuracy and clarity
Last updated: April 2026

Calculate the return on your investments. See your total gain, annualized return, and how your portfolio grows over time.

This calculator is useful for investors estimating future value from deposits and expected returns. You will typically enter Initial investment, Monthly contribution, Expected return, Years.

The result represents projected final value and total gain. If you are browsing similar tools, start with Investment Calculators or view the full calculators directory.

Also useful: Compound Interest Calculator: Grow Your Wealth, Savings Calculator: Reach Your Financial Goals.

Projected Portfolio Value

$1,763,753

Total Invested

$385,000

Total Growth

$1,378,753

Investment Portfolio Growth

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Compound InterestRule of 72

How This Calculator Works

An investment return calculator helps you see how much your portfolio will grow over time with consistent contributions and an expected rate of return. It's a great tool for planning for a house, car, or emergency fund.

The Core Calculation:

FV = P(1 + r/n)^nt + PMT [((1 + r/n)^nt - 1) / (r/n)]

  • FV = future value
  • P = current investment
  • r = expected annual return (decimal)
  • n = compounding frequency (usually monthly)
  • t = time (years)
  • PMT = monthly contribution

Formula

FV = P(1 + r)^t + PMT × [ ((1 + r)^t − 1) / r ]
Where:
  • FV = future value
  • P = initial investment
  • PMT = monthly contribution
  • r = monthly return rate
  • t = months invested

Example Calculation

Initial investment$15,000
Monthly contribution$500
Return rate8%/year
Time15 years
Typical outcome
Consistent contributions drive a large portion of the final balance

How to Invest for Your Future

Investing is the most effective way to build wealth over time. The key is to start early, stay diversified, and keep your costs low.

Types of Investments

The type of investment you choose can have a huge impact on your final balance. Consider a combination of:

  • Stocks: High-risk, high-reward. Historically, the stock market returns about 10% per year.
  • Bonds: Lower-risk, lower-reward. Bonds can help balance your portfolio and reduce volatility.
  • Mutual Funds / ETFs: Diversified portfolios of stocks and bonds. Low-cost index funds are often the best choice for long-term investors.

Asset Allocation

Your asset allocation (the percentage of your portfolio in different asset classes) is the most important factor in your long-term returns. Diversifying your investments across different asset classes can help reduce risk and improve your chances of reaching your goals.

Start Investing Today

The best time to start investing was 20 years ago. The second best time is today. Use the calculator above to see how small changes can make a big difference.

Frequently Asked Questions

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