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Roth IRA Conversion Calculator 2025

Updated for 2025 tax brackets

Should you convert your Traditional IRA to a Roth? Calculate the exact tax cost today vs. tax savings at retirement.

Traditional IRA Balance ($)

Amount to Convert ($)

Current Annual Income ($)

Expected Retirement Income ($)

Years Until Retirement

Expected Growth Rate (%)

Expected Retirement Tax Rate (%)

✅ Conversion is beneficial

$45,461

Roth advantage at retirement

Tax cost today

$6,600

Roth at retirement

$116,091

Trad after-tax

$70,629

Breakeven

16.3 yrs

Roth vs Traditional After-Tax Value Over Time

Tax Cost of Conversion

$6,600

Pay this now

Roth Value at Retirement

$116,091

100% tax-free

Net Advantage

$45,461

vs staying Traditional

Analysis & insights

Converting $30,000 from Traditional → Roth costs $6,600 in upfront federal tax. Projected after-tax wealth in retirement: Roth = $116,091, Traditional (after withdrawal tax) = $70,629. Net Roth advantage: $45,461 (break-even at year 16.257768752332122). Strong case for converting — but ONLY if you can pay the conversion tax from OUTSIDE the retirement account. Using IRA money to pay tax destroys most of the benefit.

Convert — modest advantage

Net Roth advantage of $45,461. Worth considering if you have cash to pay the conversion tax.

Risk & benchmark gauge

Current band

Break-even

+$45,461 Roth advantage

0255075100

Keep TraditionalBreak-evenConvertStrong convert

Industry benchmarks

Amount converted$30,000
Conversion tax cost$6,600
Roth future value$116,091
Traditional after-tax FV$70,629
Net Roth advantage$45,461
Break-even years16.3 years

Key insights

Pay the conversion tax from OUTSIDE the IRA

Using IRA money to pay the conversion tax (or worse — taking a withdrawal below 59½) destroys most of the benefit. If you don't have outside cash for the tax, don't convert.

Roth has no RMDs during your lifetime

Traditional IRAs force Required Minimum Distributions starting at age 73 — taxable income whether you need it or not. Roth doesn't. Big advantage for estate planning.

Gap years are conversion gold

Best conversion years: between retirement and age 73 (or before high SS / RMD income kicks in). Low income year = low marginal rate = cheap conversion.

Recommended actions(4)

Convert gradually over multiple years

High priority

Spreading $200K across 5 years of $40K conversions usually keeps you in a lower bracket each year than one $200K conversion in year 1.

Impact: Can save 5-10 percentage points on the marginal rate paid.

Run a 5-year tax projection with a CPA

High priority

Conversion strategy interacts with Social Security taxation, Medicare IRMAA surcharges, NIIT thresholds, and state tax. A CPA running multi-year projection is worth their fee.

Time conversions around market drawdowns

Medium priority

Convert when account values are low — you pay tax on a smaller balance and capture the recovery tax-free. 2022's bear market was peak conversion opportunity.

Start Saving for Retirement

FidelityOpen a free IRA or 401k rollover accountOpen IRA at Fidelity VanguardLow-cost index funds & retirement planningStart with Vanguard BettermentAutomated retirement investing (robo-advisor)Try Betterment

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What is Roth IRA Conversion?

A Roth conversion means moving pre-tax Traditional IRA funds to a Roth IRA. You pay income tax on the converted amount now, but all future growth and withdrawals are tax-free.

The key question: will your tax rate be higher now or in retirement? If you expect higher taxes later, converting now locks in today's lower rate.

Frequently Asked Questions

Sources & References

This tool is for educational purposes only and does not constitute financial, tax, or investment advice. Consult a qualified financial professional for advice specific to your situation.

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