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Medicare's $527.50 Monthly Surprise Hinges on One Form
IRMAA premiums can hit $527.50 monthly based on income from two years ago. File Form SSA-44 after retirement or a spouse's death to correct the bill. The window matters.
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A 66-year-old retired last summer, walked out of a $220,000 job, and this year her first Medicare statement showed a Part B bill of $527.50 a month. Not the standard $202.90. She has been retired for eight months. Her 2026 income will land closer to $80,000. Medicare priced her premium off her 2024 tax return, the last full salary year.
This is IRMAA, the Income-Related Monthly Adjustment Amount. It touches about 8% of Medicare beneficiaries. If modified adjusted gross income (MAGI) sits below $109,000 single or $218,000 joint, the problem does not arise. Everyone else needs to know the government prices Medicare on a two-year delay, and Form SSA-44 is the tool to correct that mismatch after qualifying life events.
MAGI for IRMAA is adjusted gross income from Form 1040 line 11 plus tax-exempt interest from line 2a. Municipal bond income that felt tax-free gets added back. So do Roth conversions, taxable capital gains from a home sale, required minimum distributions, and severance. A single one-time event in 2024 can set the 2026 premium. Repeat it in 2026, and the same applies to 2028.
The most punishing version of IRMAA is the one couples rarely model. When a spouse dies, the survivor generally files single the next year. The single brackets are roughly half the joint ones. Household income barely moved; the bracket did. A couple sitting at $215,000 owed nothing extra. The survivor with $200,000 of income the following year lands in the third surcharge tier and owes $324.60 extra on Part B, plus $60.40 on Part D.
The Social Security Administration accepts Form SSA-44 to recalculate IRMAA based on more recent income. It applies only to a qualifying life-changing event: marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, involuntary loss of income-producing property, certain losses of pension income, or a settlement tied to an employer's closure, bankruptcy, or reorganization.