Strategic Roth Conversion: The 7-Year Ladder
Retired at 62 with $1.2M in traditional IRAs, low income. Seven years to convert before RMDs start forcing higher taxes.
This scenario covers
OpportunityWhy the 62–75 Pre-RMD Window Matters for Roth Conversions
This person has a rare window: retired, low income (no W-2 wages), and Social Security not yet claimed. Their taxable income is very low — maybe $12,000–$15,000 in dividends and interest. The 12% bracket extends to $50,400 (single, 2026) — meaning they can convert up to ~$36,000/year at just 12%.
- Before age 75: No RMDs yet — a retiree who turns 62 in 2026 was born after 1959, so under SECURE 2.0 their required distributions begin at 75. They control 100% of their income until then.
- Before SS claiming: No SS income to push them into higher brackets.
- While in 12% bracket: Converting now locks in a 12% rate instead of facing 22–32% later when RMDs begin.
MathHow Much to Convert Each Year
| Age | Other income | 12% bracket space | Convert amount | Tax on conversion |
|---|---|---|---|---|
| 62 | $14,000 (dividends) | $36,400 available | $36,000 | $4,320 |
| 63 | $14,000 | $36,400 available | $36,000 | $4,320 |
| 64 | $14,000 | $36,400 available | $36,000 | $4,320 |
| 65 | $14,000 + SS $18K | $18,400 available | $18,000 | $2,160 |
| 66–68 | $14,000 + SS $18K | $18,400/yr avg | $18,000/yr | $2,160/yr |
Total converted over 7 years (ages 62–68): ~$180,000. Total tax paid: ~$21,600 (12%).
BenefitReducing Future RMD Pain
This subject was born in 1964, so under SECURE 2.0 their RMDs begin at age 75 (born 1960 or later). Without any conversions, the $1.2M traditional IRA growing at 6% reaches about $2.56M by age 75. The first RMD — the age-75 balance divided by the Uniform Lifetime factor of 24.6 — is roughly $104,000, almost all ordinary income — likely pushing into the 22–24% bracket and causing up to 85% of their Social Security benefits to become taxable. Converting during the 62–74 window shrinks that balance, so the forced first distribution is smaller.
| Conversion strategy (ages 62–68) | IRA balance at age 75 | First RMD (÷ 24.6) | Effective tax rate |
|---|---|---|---|
| No conversions | $2,560,000 | $104,000 | 22–24% bracket |
| 7-year ladder ($180K total, from the table above) | $2,243,000 | $91,000 | Still ~22%, but lower total |
| Aggressive — fill the 22% bracket each year ($570K total) | $1,579,000 | $64,000 | First RMD stays near the 12–22% line |
Model: $1,200,000 at age 62, 6% annual growth, each year's conversion removed at year-end, balance compounded to age 75, first RMD = age-75 balance ÷ 24.6 (the 2022+ Uniform Lifetime factor for age 75). "Fill the 22% bracket" converts up to $105,700 of taxable income per year (the 2026 single-filer 22% bracket top) net of $14,000 of other income before Social Security and $32,000 after, through age 68.
MedicareIRMAA: The Hidden Medicare Surcharge
Large Roth conversions increase MAGI, which can trigger IRMAA Medicare surcharges — sometimes $2,000–$6,000/year in extra Part B & D premiums. These use a 2-year lookback: income two years ago determines this year's Medicare premiums.
| MAGI (single, 2026) | Part B premium/mo | Extra annual cost |
|---|---|---|
| Below $109,000 | $202.90 | $0 — standard |
| $109,000+ – $137,000 | $284.10 | $974.40/yr extra |
| $137,000+ – $171,000 | $405.80 | $2,434.80/yr extra |
| $171,000+ – $205,000 | $527.50 | $3,895.20/yr extra |
InheritanceTax-Free Inheritance for Heirs
Under the SECURE Act (2019), most non-spouse heirs must drain inherited IRAs within 10 years. For a traditional IRA, this forces large annual distributions taxed at the heir's ordinary income rate — potentially 22–37% if they're in their peak earning years. An inherited Roth IRA is also distributed over 10 years — but tax-free.
Results: How Much This Strategy Saves
Over a 30-year horizon (ages 62–92), converting $180,000 at 12% now (cost: $21,600) vs. waiting for RMDs to force it out at 22%+ (cost of the same dollars converted later: $39,600) saves approximately $18,000 in taxes — just on the converted amount. The ripple effects on RMD timing, Social Security taxation, and IRMAA avoidance add another $20,000–$40,000 in savings over the retirement lifetime.