Roth IRA Calculator
See how a Roth IRA can grow into a tax-free nest egg. This calculator projects your balance at retirement from your current savings and annual contributions — and because Roth withdrawals are tax-free in retirement, every dollar of growth is yours to keep.
Formula reviewed for accuracy. Our methodology & sources
Roth IRA Calculator
finance calculator
How It Works
The calculator compounds your current Roth IRA balance and your monthly contributions (your annual amount spread across the year) at your expected return until retirement. Because qualified Roth withdrawals are tax-free, the full balance — contributions plus growth — is available without income tax, and the 4% rule estimates the monthly income it could provide.
Formula
Future Value = Current × (1+r)^n + Monthly × [((1+r)^n − 1) / r] Where: r = monthly return, n = months to retirement. All growth is tax-free.
Examples
$7,000/year from age 30 to 65 at 7%
Maxing a Roth IRA for 35 years grows into a large tax-free balance.
Starting later: age 45 to 65
Fewer years of compounding — showing why starting early matters.
Frequently Asked Questions
What is the Roth IRA contribution limit?
The IRS sets an annual limit that changes over time, with a higher "catch-up" amount once you reach age 50. Contributions must also come from earned income, and eligibility phases out at higher incomes. Check the current year's limit before maxing out.
Why is a Roth IRA tax-free?
You contribute money you have already paid income tax on. In exchange, qualified withdrawals in retirement — both your contributions and all the investment growth — are completely tax-free, unlike a traditional IRA or 401(k) where withdrawals are taxed.
Roth IRA vs traditional IRA — which is better?
A Roth is often better if you expect to be in the same or higher tax bracket in retirement, or you want tax-free flexibility. A traditional IRA gives you a tax deduction now. Many savers use both to diversify their future tax exposure.
Can I withdraw from a Roth IRA early?
You can withdraw your own contributions at any time without tax or penalty. Withdrawing investment growth before age 59½ (and before the account is 5 years old) can trigger taxes and a penalty, with some exceptions.
What return should I assume?
A diversified long-term portfolio has historically returned about 6–8% annually before inflation. Using 6–7% is a reasonable planning assumption for a multi-decade horizon.
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