Retired Firefighter With $810,000 Discovers Pension Just Triggered an IRMAA Surprise

Picture a 62-year-old retired firefighter living comfortably on a $78,000 public-safety pension. He has $410,000 in a 457(b) and about $400,000 in other savings. The truck needs replacing and the kitchen needs a remodel, so he pulls $60,000 from the 457(b) in a single tax year. Two years later, his Medicare bill arrives carrying a surcharge he never anticipated, and there is no way to reverse it.

This scenario represents one of the most common and costliest blind spots for retirees holding sizable tax-deferred balances. The pension is taxable income on its own. Stack a lump-sum 457(b) withdrawal on top of it, and Modified Adjusted Gross Income (MAGI) vaults past the first Income-Related Monthly Adjustment Amount (IRMAA) tier for Medicare. The surcharge then sticks for the entire premium year, regardless of what income looks like in the months that follow.

How IRMAA Works as a Cliff

IRMAA functions as a cliff: one dollar over the threshold triggers the full surcharge for that tier, not just a proportional slice of it. For 2026, Tier 1 begins at MAGI above $109,000 for single filers and $218,000 for joint filers, and it extends up to $137,000 (single) or $274,000 (joint) before the next tier kicks in. Cross that first line and the Part B premium climbs from the standard $202.90 per month to $284.10, an $81.20 monthly IRMAA add-on. Part D picks up another $14.50 per month at the same tier. For a married couple where both spouses are on Medicare, each pays the surcharge independently, so the combined household hit from crossing Tier 1 runs roughly $2,297 more per year compared with paying the standard rate.

Social Security uses your tax return from two years prior to set the current year’s IRMAA. A 457(b) withdrawal taken in 2026 determines the 2028 Medicare premium. By the time the higher bill appears, the underlying tax year is closed and the surcharge is locked in. Spending less the following year does not undo it.

In this example, the firefighter’s pension alone generates roughly $78,000. Add interest from cash savings plus a portion of taxable Social Security once he claims, and his baseline MAGI is already approaching the $109,000 single threshold before any voluntary withdrawal. A $60,000 457(b) distribution can easily push him through Tier 1 and deep into a bracket he had no intention of entering.

A Strategic Path for People in This Spot

Two approaches can meaningfully reduce this exposure:

1. Front-load 457(b) draws into pre-Medicare years or low-MAGI years. Between retirement and Medicare enrollment at 65, IRMAA does not apply at all. Pulling funds during that window, or making partial Roth conversions if the plan allows rollovers, drains the tax-deferred balance before it can collide with Medicare premiums and eventual Required Minimum Distributions. Note that under SECURE 2.0, RMDs begin at age 73 for those born between 1951 and 1959, and at age 75 for those born in 1960 or later, so the planning window differs by birth year.
2. Spread withdrawals to stay under the Tier 1 line once on Medicare. If the pre-65 window has closed, the goal shifts to keeping MAGI just below $109,000 (single) or $218,000 (joint). That typically means smaller annual 457(b) draws paired with spending from taxable accounts. Funding a large purchase from after-tax savings in a high-pension year is often far cheaper than absorbing two years of IRMAA surcharges on top of the income tax bill.

An SSA-44 appeal is worth filing only when a qualifying life-changing event applies. The Social Security Administration recognizes eight such events: marriage, divorce or annulment, death of a spouse, work stoppage or reduction, loss of income-producing property, loss of pension income, an employer settlement payment, and a catch-all category for other significant income reductions. A voluntary 457(b) withdrawal does not qualify under any of those categories, so the surcharge it triggers cannot be appealed away.

What to Evaluate First

Run a MAGI projection for every year from now through age 75 before touching the 457(b). Map the pension, expected Social Security, investment income, and any planned distributions against the IRMAA tiers. The most common mistake here is treating a lump-sum withdrawal as a single-year tax decision when it is actually a three-year decision: the tax bill arrives immediately, and the Medicare premium consequence lands two years later.

Editor’s note: This article was updated to reflect the precise 2026 Medicare Part B standard premium of $202.90 per month and the Tier 1 IRMAA surcharge figures of $284.10 for Part B and $14.50 for Part D, per CMS and Federal Register data. The Tier 1 income bracket upper boundary ($137,000 single / $274,000 joint) and the full list of eight SSA-44 qualifying life-changing events were also added, along with SECURE 2.0 clarification that the RMD starting age rises to 75 for those born in 1960 or later.

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