Roth IRA Calculator Online
Project how a Roth IRA grows tax-free from your current balance and annual contributions, right in your browser. Estimates only, not financial advice.
The Roth IRA Calculator runs entirely in your browser. The current balance, contribution, return, and term figures you enter never leave your device and are not uploaded to ArrayKit. Results are estimates only, not financial advice.
Open the Traditional IRA Calculator
About Roth IRA Calculator
Roth IRA Calculator projects how a Roth IRA balance grows when contributions and investment returns compound tax-free year after year. Enter a current balance, a fixed annual contribution, an expected average annual return, and a number of years, and it applies annual compounding — each year's contribution is added first, then the whole balance grows at your chosen rate — to project a final balance. It separates the result into total contributions and tax-free growth so you can see exactly how much of the final balance came from your own deposits versus investment returns, and a year-by-year table shows the balance building over time. It is useful for comparing a Roth IRA against a traditional IRA or 401(k), or for sanity-checking a retirement savings plan before committing real money. Contribution limits and eligibility rules are set by the IRS and change over time, so these are estimates only, not financial advice — verify with a qualified professional. Everything runs locally in your browser; your figures are never uploaded.
Features
- Projects final balance from a current balance, annual contribution, return, and term
- Applies annual compounding with each year's contribution added before that year's growth
- Separates the result into total contributions and tax-free growth
- Year-by-year table shows the contribution and running balance for each year
- Copy a plain-text summary of the full projection in one click
- Clear error messages for a negative balance, contribution, or an invalid term
- Works for any Roth IRA contribution amount, rate, or time horizon you enter
- Runs entirely on your device — figures are never sent anywhere
How to use the Roth IRA Calculator
- Enter your current Roth IRA balance
- Enter the annual contribution amount you plan to make
- Enter an expected average annual return percentage
- Enter the number of years to project growth over
- Read the projected balance, total contributions, and tax-free growth
Example
Input
$6,000/yr, 7%, 30 yr
Output
Balance: ~$606,000
Common errors & troubleshooting
- Expected return typed as a decimal (0.07) instead of a percentage. — Enter the annual return as a whole percentage, such as 7, not 0.07 — the calculator already divides by 100 internally.
- Projected balance looks too low for a long time horizon. — Compounding is annual and contributions are added at the start of each year — check that the number of years and the annual contribution amount match the scenario you are modeling.
- Total contributions figure seems off compared to a manual calculation. — Total contributions only counts the annual contribution field multiplied by the number of years; the starting current balance is not counted as a contribution.
- Projected balance exceeds real-world IRS contribution limits. — This calculator does not enforce annual Roth IRA contribution limits or income eligibility rules, which change over time — check current IRS limits before relying on the projection.
Frequently asked questions
- How does the Roth IRA Calculator project growth?
- It compounds annually: each year's contribution is added to the balance first, then the whole balance grows by your entered annual return percentage. This repeats for the number of years you specify, starting from your current balance.
- What does tax-free growth mean in the Roth IRA Calculator?
- It is the projected balance minus your starting balance and minus every dollar you contributed. Because a Roth IRA is funded with after-tax dollars, this entire portion of the balance is projected to be tax-free when withdrawn under IRA rules.
- Does the Roth IRA Calculator account for contribution limits?
- No. The calculator projects growth from any contribution amount you enter but does not check it against the IRS's annual Roth IRA contribution limit or income eligibility rules, which change from year to year.
- Is the Roth IRA Calculator's output financial advice?
- No. It produces mathematical estimates based on the numbers you enter. Actual investment returns, contribution limits, and tax rules can differ, so verify important retirement decisions with a qualified financial professional.
- Does the Roth IRA Calculator upload my balance or contribution figures?
- No. All calculations run locally in your browser. The current balance, contribution, return, and term you enter stay on your device and are never uploaded to ArrayKit.
- Can I model an existing Roth IRA balance with no further contributions?
- Yes. Set the annual contribution to 0 and enter your current balance — the calculator will project pure compound growth on that balance at your expected annual return.
Related tools
All ArrayKit tools