Investment Calculator 2026
Easily estimate your future investment value, total contributions, investment growth, and the potential impact of annual investment fees.
Investment Calculator
Estimated Investment Results
What Is an Investment Calculator?
An investment calculator is a financial planning tool that estimates how an initial investment and regular contributions could grow over time based on an assumed annual return. This investment calculator also lets you include an estimated annual investment fee so you can compare growth before and after the fee assumption.
The calculator is useful for exploring different investment scenarios, such as increasing your monthly contribution, changing the expected return, investing for a longer period, or comparing the potential effect of investment fees.
How the Investment Calculator Works
The calculator starts with your initial investment and then adds your monthly contributions. Each month, the balance is increased using the assumed monthly return after the annual fee assumption.
The calculator also runs a separate gross-return scenario. The difference between the gross-return scenario and the fee-adjusted scenario is shown as the estimated fee impact.
This is a simplified planning model. Real investments may calculate fees, returns, dividends, distributions, and taxes differently.
Investment Growth Example
Suppose you start with $10,000, contribute $300 per month, assume a 7% annual return, invest for 20 years, and assume a 0.5% annual fee.
Changing just one assumption can produce a substantially different projection. For example, increasing the monthly contribution can increase the amount invested, while extending the investment period gives the balance more time to potentially compound.
What Affects Investment Growth?
Compound Growth and Long-Term Investing
Long-term investment growth can be influenced by compounding, where investment returns remain invested and can themselves generate additional returns. Regular contributions can add another source of growth over time.
Because future investment returns are uncertain, it is useful to run multiple scenarios rather than relying on one assumed return. Try changing the annual return, monthly contribution, investment period, and fee to see how the estimate changes.
For a more focused compounding calculation, see our Compound Interest Calculator.
Investment Calculator vs. Savings Calculator
A savings calculator is generally useful when you want to estimate savings growth from deposits and an assumed savings rate. An investment calculator is designed for scenarios where you want to model an expected investment return and potentially include investment fees.
If your main goal is reaching a specific savings target, you can also use the Savings Calculator to estimate the monthly amount needed to reach your goal.
How to Use This Investment Calculator
- Enter your current or initial investment amount.
- Enter the amount you expect to contribute each month.
- Enter an assumed annual investment return.
- Enter the number of years you plan to invest.
- Enter the estimated annual investment fee.
- Click Calculate Now to view the projection.
- Change one assumption at a time to compare different scenarios.
Understanding Investment Fees
Investment fees can include expense ratios, advisory fees, account fees, transaction-related costs, or other charges depending on the investment and provider. Not every investment has the same fee structure.
This calculator uses the annual fee percentage you enter as a simplified modeling assumption. Check your actual investment documents or provider disclosures for the fees that apply to your account.
Investment Calculator FAQs
What does an investment calculator calculate?
It estimates the future value of an investment using your starting balance, recurring contributions, expected return, investment period, and fee assumption.
Is the investment calculator result guaranteed?
No. The result is only a mathematical estimate based on the assumptions entered. Investment returns can fluctuate and are not guaranteed.
Does this calculator include monthly contributions?
Yes. You can enter a monthly contribution amount and the calculator adds that amount at the end of each modeled month.
Does the calculator include investment fees?
Yes. You can enter an annual investment fee percentage. The calculator uses that value to create a simplified fee-adjusted growth estimate.
What is investment growth?
Investment growth is the estimated increase in value beyond the money you originally invested and subsequently contributed.
Can I use this as an ROI calculator?
It can help explore investment growth assumptions, but it is not a complete tax or accounting ROI analysis. Actual return calculations depend on the investment and the period being measured.
Does this calculator account for taxes?
No. Tax treatment can vary by investment type, account type, jurisdiction, income, and individual circumstances.
Can I compare different investment scenarios?
Yes. Change the inputs and calculate again. You can compare different contribution amounts, return assumptions, time periods, and fees.
Should I use a constant annual return assumption?
A constant return is a simplified modeling assumption. Actual investment returns can vary from year to year, so the calculator should be used for scenario planning rather than as a prediction.
Can I print or save my investment calculation?
Yes. Click the Print / Save PDF button to use your browser’s printing options and save the calculation as a PDF.
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Investment Planning Disclaimer
This investment calculator is provided for educational and informational purposes only. It does not provide investment, financial, tax, or legal advice. The estimates depend on the assumptions entered and should not be treated as a guarantee of future investment performance.
Before making important financial decisions, review the relevant investment documents, fee disclosures, account terms, and applicable tax rules, and consider consulting a qualified professional when appropriate.
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