Roth IRA Calculator

The Roth IRA Calculator projects the tax-free balance you'll accumulate at retirement by compounding your current account value and annual contributions at your expected rate of return. Unlike a Traditional IRA or 401(k), every dollar that comes out of a Roth IRA in retirement—including all of the investment growth—is completely free of federal income tax. That single distinction can be worth hundreds of thousands of dollars over a lifetime.

Roth IRAs were introduced by the Taxpayer Relief Act of 1997 and named after Senator William Roth. Today they are among the most flexible and powerful retirement accounts available: no Required Minimum Distributions, penalty-free access to contributions at any time, and the ability to pass a large tax-free inheritance to beneficiaries. For younger investors in lower tax brackets, the Roth IRA frequently outperforms every other retirement account type.

This calculator is most useful when compared side-by-side with the Traditional IRA Calculator and the 401(k) Calculator to determine which account type best fits your tax situation.

• Choosing Roth vs. Traditional: Compare after-tax projections from both calculator types to see which account leaves more wealth at retirement given your tax assumptions.
• Validating income eligibility: Check whether your MAGI falls below the phase-out threshold before making contributions.
• Quantifying the Backdoor Roth: Model the long-term value of using the Backdoor Roth strategy if you exceed income limits.
• Estate planning: Because Roth IRAs have no RMDs, they can continue compounding for beneficiaries. Project the account's value decades into the future.
• Early retirement (FIRE) planning: Roth contributions (not earnings) can be accessed penalty-free before 59½, making Roth IRAs especially valuable for FIRE strategies.
• Annual contribution decisions: Determine how much to contribute and whether reaching the maximum $7,000 limit is financially feasible in your budget.

The Roth IRA balance projection uses the same compound interest formula as other retirement accounts:

• FV = Tax-free balance at retirement
• PV = Current Roth IRA balance
• r = Annual return rate (as decimal)
• n = Years until retirement
• C = Annual contribution

The critical difference from a Traditional IRA: the resulting FV is entirely tax-free. No withdrawal tax rate adjustment is needed. This makes Roth IRA projections inherently more valuable than the same nominal balance in a Traditional IRA or 401(k).

Tax-free profits = FV − Total Contributions. Estimated monthly income = (FV × 0.04) / 12 (4% rule, tax-free).

1. Confirm income eligibility: Verify your MAGI is below the phase-out threshold for your filing status.
2. Determine years to retirement: Retirement Age − Current Age (e.g., 65 − 28 = 37 years).
3. Compound existing balance: PV × (1 + r)^n (e.g., $5,000 × (1.07)^37 = $62,053).
4. Calculate future value of annual contributions: $7,000 × [((1.07)^37 − 1) / 0.07] = $1,052,490.
5. Sum both components for tax-free balance: $62,053 + $1,052,490 = $1,114,543.
6. Calculate tax-free profits: $1,114,543 − (37 × $7,000) = $855,543 in tax-free growth.
7. Estimate monthly income (4% rule, tax-free): ($1,114,543 × 0.04) / 12 = $3,715/month, entirely tax-free.

Example 1: Young Professional Starting Early, Age 25

Example 2: Mid-Career Saver, Age 35

Example 3: Catch-Up Contributions, Age 52

Example 4: Backdoor Roth for High Earner, Age 40

Example 5: FIRE Strategy, Age 28

• Open a Roth IRA as early as possible: Even a teenager with summer job income qualifies to contribute up to their earned income. A $1,000 contribution at age 16 can grow to over $40,000 tax-free by retirement at 7%.
• Prioritize Roth over Traditional if under 30: Decades of tax-free compounding on high-growth equity investments make the Roth math compelling for young investors.
• Use low-cost equity index funds: Total market or S&P 500 index funds with sub-0.10% expense ratios are ideal inside a Roth, where all gains are permanently tax-free.
• Hold bonds in Traditional accounts, stocks in Roth: This asset location strategy ensures the highest-growth assets benefit from tax-free treatment.
• Don't touch earnings before age 59½: Preserve the compounding by using regular savings for emergencies rather than Roth earnings.
• Combine with Roth 401(k) for higher contributions: The Roth 401(k) limit is $23,500 (2025), much higher than the IRA limit. Both can be used simultaneously for maximum tax-free savings.
• Review annually: Income changes can affect your eligibility. Check MAGI limits each year before contributing.

The Roth IRA's unique combination of flexibility, tax-free growth, and zero Required Minimum Distributions makes it arguably the single best retirement account for investors with a long time horizon. The compound effect of paying taxes once—now, on modest contributions—while never paying taxes on potentially millions in growth is a mathematical advantage that grows with every year of holding.

Use this calculator to see exactly how your current and future contributions translate into tax-free wealth. Compare it with the Traditional IRA Calculator to determine the right account for your tax situation, and revisit your projections annually as your income and financial goals evolve.

If you qualify for a Roth IRA today, there is no better time to start or increase your contributions. Tax-free compounding is a gift that grows exponentially over time.