Why a 65-Year-Old Couple With $2 Million Is Converting Exactly $110,000 a Year Until Age 73
Retiring at 65 with $2 million sounds like the finish line, but the tax trap waiting at 73 can quietly erase years of savings growth. One couple's precise annual conversion figure threads a needle between two government thresholds that most…
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A 65-year-old couple with $2 million split between two traditional 401(k)s stops working this year, delays Social Security to 70, and starts a Roth conversion ladder. The number they pick is $110,000 per year, run every year until required minimum distributions kick in at 73. That amount is engineered to fill one tax bracket exactly while staying well under one Medicare surcharge tier.
The playbook shows up often on retirement forums and in earlier 24/7 Wall St. coverage of the move to execute in your 60s before RMDs begin. The reason it works comes down to two lines on the IRS tax tables and one line on the Medicare fact sheet.
How $110,000 Fills the 12% Bracket to the Ceiling
For 2026, married couples filing jointly get a standard deduction of $32,200. The 12% bracket runs up to $100,800 of taxable income, and the 22% bracket takes over on every dollar above that line.
Assume the couple has roughly $23,000 in dividends and interest from a taxable brokerage account. Add the $110,000 conversion and gross income lands at $133,000. Subtract the standard deduction and taxable income lands at the exact top of the 12% band.
Total federal tax on that income runs about $11,600, an effective rate near 11% on the conversion itself. Push one dollar past the ceiling and the next dollar is taxed at 22%. That is the bracket-filling idea in plain terms: use every dollar of the cheap bracket, then stop.
Why the IRMAA Ceiling Also Sets the Number
Medicare’s income-related surcharges use a two-year lookback, so a conversion done in 2026 drives 2028 premiums. For a joint filer, the first IRMAA tier hits when modified adjusted gross income crosses $218,000.
Above that line, Part B jumps from $202.90 per month to $284.10 per person, and Part D adds another $14.50 on top of the plan premium. Doubled across a couple and stretched over twelve months, one careless conversion year can cost more than $2,300 in surcharges alone.
At $133,000 of MAGI, the couple sits roughly $85,000 below that first tier. The headroom is deliberate. It leaves room for a capital gain distribution, a bond that matures at a premium, or a mid-year rebalance without accidentally shoving them over the line.
What This Does to the RMD Bill at 73
Left alone, the $2 million balance can compound to roughly $3.2 million by age 73. The first RMD uses a life-expectancy factor of 26.5, producing a required withdrawal near $120,000.
Added to two Social Security checks and taxable dividends, that pushes ordinary income into the 22% bracket and drags MAGI toward the IRMAA cliff. Converting $110,000 a year for eight years moves about $880,000 out of the traditional accounts first, shrinking the remaining balance and the mandatory withdrawal that comes with it. Those quiet years between the last paycheck and the first RMD are the cheapest tax rate most retirees will ever see again, which is the whole subject of our free guide to the Roth window.
Two market conditions make the trade-off sensible right now. The federal funds target upper bound sits near 4%, so cash set aside to pay the conversion tax still earns a real return. The 10-year Treasury yields nearly 5%, letting the fixed-income sleeve inside the new Roth lock in a coupon while it grows tax-free.
Three Moves to Copy or Rule Out
- Recalculate your own ceiling. Start with the $100,800 top of the 12% joint bracket, add the $32,200 standard deduction, and subtract every other dollar of taxable income you expect this year (pensions, interest, dividends, part-time work). What is left is the largest conversion you can do this year without paying 22%.
- Model your 2028 IRMAA line today. Your 2026 conversion drives 2028 premiums. Stay under $218,000 MAGI to keep Part B at $202.90 per month. The 2027 Social Security COLA is tracking near 3.1%, so future benefit checks will quietly eat some of your headroom.
- Price the do-nothing scenario. Project your traditional balance to age 73, divide by 26.5, and add Social Security and taxable dividends. If that combined figure lands in the 22% or 24% bracket, converting at an effective 11% now is the cheaper trade, even after paying the tax out of a taxable account.
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