73-Year-Old With $2.1M Just Found Out His First RMD Pushed Him Into IRMAA Tier Three

A retiree turns 73 and takes his first required minimum distribution (RMD) from a long-untouched traditional IRA. Two years later, a letter from Social Security arrives explaining his Medicare premiums are jumping by hundreds of dollars a month. Nothing about his spending changed. Nothing about his investments changed. The tax code simply caught up with 30 years of deferral.

Consider this case: a single 73-year-old holds $2.1 million in total assets, with $1.7 million parked in a traditional IRA and roughly $42,000 a year coming in from Social Security. His first RMD lands near $64,000 using a divisor of 26.5 from the IRS Uniform Lifetime Table. Stack that on top of taxable Social Security and any portfolio income from his $400,000 in outside assets, and his modified adjusted gross income (MAGI) clears the third IRMAA tier for a single filer.

What IRMAA Tier 3 Costs

For 2026, a single filer with MAGI above $171,000 and up to $205,000 pays a Part B surcharge of $324.60 on top of the $202.90 base premium, for a total monthly bill of $527.50. Part D adds another $60.40 surcharge per month at that tier. The bill arrives on a two-year lag, so the RMD taken at 73 shows up in Medicare premiums at 75. Because RMDs grow each year as the divisor shrinks, the surcharge tends to recur and climb. A lifetime of tax deferral compresses into a forced, escalating taxable income stream that lands precisely when the retiree has the least flexibility to manage it.

That dynamic is worth spelling out. A $1.7 million pre-tax balance is simply too large to draw down gracefully starting at 73. By the early 80s, the required draw on a portfolio that keeps compounding can easily push MAGI into the fourth or fifth IRMAA tier, where the Part B total premium climbs to $649.20 or $689.90 a month. The IRMAA structure is also a cliff system: crossing a bracket boundary by even $1 triggers the full surcharge for the higher tier, with no proration.

Two Strategies Worth Considering

For anyone still in their late 60s or very early 70s, the dominant move is to shrink the RMD base before it activates. Two levers stand out:

1. Pre-73 Roth conversions. Converting traditional IRA dollars to a Roth in the years between retirement and age 73 fills the lower brackets voluntarily, at known rates, before Social Security and RMDs stack on top. Every dollar converted is a dollar that never generates a future RMD and never counts toward MAGI again. The trade is paying tax now to avoid a larger, IRMAA-amplified tax bill later. For a $1.7 million IRA balance, even modest annual conversions over five or six years can meaningfully lower the lifetime RMD trajectory.
2. Qualified charitable distributions. A QCD sends IRA dollars directly to a qualified charity, satisfies the RMD, and never hits AGI or MAGI. The 2026 QCD limit is $111,000 per individual, up from $108,000 in 2025, and the ceiling is indexed annually. That flexibility matters more than ever in 2026: the One Big Beautiful Bill Act now restricts itemized charitable deductions by imposing a 0.5% of AGI floor and capping the tax benefit at 35 cents on the dollar for high-bracket filers. A QCD sidesteps both of those limits entirely, since the dollars never enter income in the first place. For a retiree who already gives to charity, routing those gifts through the IRA rather than writing checks from a brokerage account is among the most efficient moves available.

Withdrawal sequencing matters too. Pulling from a taxable brokerage account first, where only realized gains hit MAGI at preferential capital-gains rates, preserves Roth space and keeps ordinary-income RMDs from piling on top of fully taxable interest and dividends.

For this retiree at 73, the Roth conversion window is largely closed. A conversion counts as ordinary income and worsens the very IRMAA problem he is trying to fix. The realistic options now are QCDs to blunt the taxable RMD, careful sequencing of withdrawals from the $400,000 held outside the IRA, and accepting that the Tier 3 surcharge is the cost of a successful deferral strategy that ran a few years longer than ideal.

Editor’s note: This article updates the 2026 qualified charitable distribution limit to $111,000 per individual (increased from $108,000 in 2025) and adds context on how the One Big Beautiful Bill Act’s new restrictions on itemized charitable deductions make QCDs a more powerful IRMAA-management tool in 2026.

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