Roth IRA Calculator
Estimate how your Roth IRA could grow over time from your current balance, regular contributions, expected return and investment horizon.
The calculator assumes a constant annual return compounded monthly. Actual investment returns vary and are not guaranteed.
How the Roth IRA Calculator Works
The calculator estimates the future value of a Roth IRA using your current balance, monthly contribution, expected annual investment return and investment period. The calculation compounds the assumed return monthly and adds regular contributions throughout the period.
The result separates your starting balance and new contributions from the estimated investment growth so you can see how much of the projected balance comes from each source.
How to Use the Roth IRA Calculator
Enter Your Current Balance
Enter the amount currently held in your Roth IRA. If you are starting from zero, enter 0.
Enter Your Monthly Contribution
Enter the amount you expect to contribute each month during the investment period.
Choose an Expected Return
Enter an assumed annual investment return. This is an estimate for calculation purposes and is not a guarantee of future performance.
Set Your Investment Period
Enter how many years you expect the money to remain invested, then choose whether contributions are made at the beginning or end of each month.
Roth IRA Growth Formula
For an initial balance, monthly contributions and a constant monthly return, the future value is calculated using compound growth. Contributions made at the end of each month use the ordinary annuity formula. Contributions made at the beginning of each month receive one additional period of growth.
The monthly rate used by the calculator is the annual return divided by 12, and the number of compounding periods is the number of years multiplied by 12.
What Is a Roth IRA?
A Roth IRA is a type of individual retirement account in the United States. Contributions are generally made with after-tax money, and qualified withdrawals can receive tax-free treatment under applicable rules.
Eligibility, contribution limits, income rules and withdrawal requirements can change. Check current IRS guidance or consult a qualified tax professional for information specific to your situation.
Why Time Matters for Retirement Investing
Compound growth can become more significant over longer periods because returns may themselves generate additional returns. Regular contributions can also increase the amount of capital participating in potential investment growth.
The calculator illustrates this mathematical effect but does not predict market performance. Investment returns can be positive or negative and can vary substantially from year to year.
Important Information
This calculator is an educational estimate, not investment, tax or financial advice. It does not account for investment fees, changing returns, inflation, contribution-limit changes, taxes, penalties or individual eligibility requirements.
Roth IRA rules are subject to applicable law and can change. Before making retirement or tax decisions, consider reviewing current official guidance and speaking with a qualified financial or tax professional.
Frequently Asked Questions
What does a Roth IRA calculator estimate?
It estimates the future value of a Roth IRA based on your starting balance, recurring contributions, assumed return and investment period.
Does the calculator guarantee my retirement balance?
No. The result is a mathematical projection using a constant assumed return. Actual investment performance is uncertain and can vary over time.
Does this calculator include Roth IRA contribution limits?
No. The calculator focuses on investment growth and does not validate annual contribution limits or eligibility rules.
Are Roth IRA withdrawals always tax-free?
Qualified Roth IRA withdrawals can receive tax-free treatment, but specific rules and exceptions apply. Review current tax guidance for your circumstances.
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