Roth Conversion Optimizer
How much should you convert each year to minimize taxes paid over your lifetime, including the Social Security torpedo effect and RMD projections.
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Tax Rates
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Projection
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Tax Cost of Conversion This Year
$7,033
23.4% effective rate on conversion
Projected Lifetime Tax Savings
$18,507
Roth is favorable
Projected Roth Balance at Retirement
$309,575
vs $1,238,299 in Traditional (pre-tax)
Estimated First RMD (at 73)
$77,651
Adds to taxable income: $144,151/yr
Traditional vs Roth at Retirement
Keep in Traditional
Balance at Retirement (pre-tax)
$1,238,299
RMD at Age 73
$77,651
Taxable Income w/ RMD
$144,151
SS Torpedo Risk
Yes, RMDs push SS taxable
Convert to Roth
Roth Balance at Retirement
$309,575
Tax-Free Withdrawals
Unlimited
Required Minimum Distributions
None (Roth IRA)
Break-Even Year
Beyond 40 yrs
⚠️ Social Security torpedo: Once your combined income exceeds $34,000 (single) or $44,000 (MFJ), up to 85% of Social Security benefits become taxable. Your projected RMDs of $77,651/yr from the traditional account will push your combined income to $170,551, likely triggering the torpedo effect and increasing your effective tax rate significantly.
10-Year Retirement Balance Projection (After-Tax)
| Year | Traditional (After-Tax) | Roth Balance | Roth Advantage |
|---|---|---|---|
| 2048 | $1,105,828 | $354,432 | -$751,396 |
| 2050 | $1,266,063 | $405,789 | -$860,273 |
| 2052 | $1,449,515 | $464,588 | -$984,927 |
| 2054 | $1,659,550 | $531,907 | -$1,127,643 |
| 2056 | $1,900,019 | $608,980 | -$1,291,038 |
| 2058 | $2,175,332 | $697,222 | -$1,478,110 |
| 2060 | $2,490,537 | $798,249 | -$1,692,288 |
| 2062 | $2,851,416 | $913,915 | -$1,937,501 |
| 2064 | $3,264,586 | $1,046,342 | -$2,218,244 |
| 2066 | $3,737,625 | $1,197,957 | -$2,539,668 |
The optimal Roth conversion strategy is to convert in years when your income is low: gaps in employment, early retirement before Social Security, or years before RMDs begin. These are often called “conversion windows.” Converting now while in the 22% bracket beats paying 22% on forced RMDs later.