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Roth IRA Contribution Phase-Out Calculator

Check how much you can contribute to a Roth IRA based on your income and filing status.

Result

Max Roth IRA Contribution
$7,000.00

Uses the 2025 base contribution limit and MAGI phase-out ranges (add $1,000 to the limit if you're 50 or older). If you're above the phase-out entirely, a "backdoor Roth" (nondeductible Traditional IRA contribution converted to Roth) is a common workaround, though it involves pro-rata tax rules if you hold other pre-tax IRA balances.

About the Roth IRA Phaseout Calculator

This calculator determines how much you're allowed to contribute to a Roth IRA based on your modified adjusted gross income (MAGI) and filing status, since Roth eligibility phases out gradually rather than cutting off abruptly. It is useful for anyone whose income falls near or within the IRS phase-out range who needs to know their exact allowable contribution.

How It Works

You select your filing status and enter your MAGI. The calculator checks your income against the phase-out range for your filing status: below the range you get the full contribution limit, above the range you get zero, and within the range your allowed contribution shrinks proportionally as your income rises through it.

If MAGI >= phaseoutEnd, allowedContribution = 0. If MAGI <= phaseoutStart, allowedContribution = fullLimit ($7,000). Otherwise: reduction = fullLimit x ((MAGI - phaseoutStart) / (phaseoutEnd - phaseoutStart)); allowedContribution = max(fullLimit - reduction, 0).

Formula & Methodology

The 2025 phase-out range is $150,000 to $165,000 MAGI for single filers and $236,000 to $246,000 for married filers. Within that range, the calculator measures how far your MAGI has progressed through the range as a fraction (0 to 1), multiplies the full $7,000 limit by that fraction to find the reduction amount, and subtracts the reduction from the full limit, floored at zero so the result never goes negative.

Examples

Single filer near the top of the range

A single filer with MAGI of $145,000 sits just below the $150,000 phase-out start for single filers, so the calculator returns the full $7,000 allowed contribution with no reduction.

Married couple mid-phaseout

A married couple filing jointly has a combined MAGI of $241,000, which falls midway through their $236,000 to $246,000 phase-out range (about 50% of the way through). Roughly half of the $7,000 limit is reduced, leaving an allowed contribution of about $3,500.

Advantages

  • Applies the exact linear phase-out formula the IRS uses rather than rounding to a rough estimate near the range boundaries.
  • Automatically adjusts the phase-out thresholds based on filing status, avoiding manual lookup of the correct income range.
  • Useful for testing how a MAGI change, from a bonus, raise, or additional income, affects Roth IRA eligibility before making a contribution.

Common Mistakes

  • Assuming Roth eligibility is all-or-nothing at a single income cutoff, when in reality the allowed contribution shrinks gradually across the entire phase-out range.
  • Forgetting to add the age-50-and-over catch-up contribution, since this calculator's $7,000 base limit does not include it.
  • Using gross income or taxable income instead of MAGI, which can include certain add-backs and produce an inaccurate result if not calculated correctly.

Edge Cases to Watch For

  • The calculator uses the base $7,000 limit only and does not add the catch-up contribution available to filers age 50 and older, so contributors in that age group should add that amount separately to the result.
  • At exactly the phase-out end threshold or above, the allowed contribution is set to exactly zero rather than a small residual amount.
  • The reduction fraction is calculated linearly, so someone in the exact middle of the phase-out range receives roughly half the full contribution limit, not a stepped or bracketed reduction.
  • The calculator does not account for a 'backdoor Roth' strategy (a nondeductible Traditional IRA contribution later converted to Roth), which is a common workaround for income fully above the phase-out range but is not reflected in this contribution-limit figure.

Common Use Cases

  • Individuals near the Roth IRA income phase-out range planning how much they can contribute before year end.
  • Married couples estimating their combined allowed Roth contribution as their joint income changes.
  • Financial planners illustrating to clients how a raise or bonus could reduce Roth IRA eligibility.
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why does the IRS phase out Roth eligibility instead of simply blocking high earners entirely?

The gradual phase-out avoids a harsh cliff effect where someone earning even $1 over a hard limit would lose all eligibility - instead, contribution room shrinks smoothly as income rises through the phase-out range, so someone in the middle of the range can still make a partial contribution rather than facing an all-or-nothing outcome.

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Conclusion

The Roth IRA Contribution Phase-Out Calculator applies the IRS's linear reduction formula to show exactly how much of the $7,000 base limit remains available at a given MAGI and filing status. For income above the full phase-out range, exploring a backdoor Roth contribution is a separate strategy this calculator does not model.

References