Your 2025 tax return already set your 2027 Medicare premiums, punishing Roth conversions, home sales, and large RMDs with locked-in IRMAA surcharges.
Married couples on Medicare pay every IRMAA surcharge twice, pushing combined monthly Part B costs from $203 up to $974 per tier crossed.
Form SSA-44 only grants IRMAA relief for qualifying life events, and Roth conversions, capital gains, and large RMDs are explicitly excluded from appeal.
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A couple in their late 60s converted $120,000 from a traditional IRA to a Roth in 2025. They filed the return in April 2026, paid the federal tax, and thought the bill was closed. That single line on their 1040 just reset their 2027 Medicare premiums, and Social Security will not let them undo it.
This is the mechanic that catches retirees off guard: the Income-Related Monthly Adjustment Amount, or IRMAA. Only roughly 8% of people with Medicare Part B pay it, so a household solidly below the first threshold can move on. Anyone who ran a Roth conversion, sold a business, closed on an appreciated home, or took a large Required Minimum Distribution in 2025 needs to keep reading.
Medicare sets premiums from modified adjusted gross income from the tax return filed two years earlier, based on the return already on file rather than current-year income. Your 2025 MAGI, reported on the return most people submitted in April 2026, sets your 2027 Part B and Part D premiums. Your 2026 income will drive 2028. The look-back is fixed, and the return is already at the IRS.
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MAGI here is adjusted gross income (Form 1040, line 11) plus tax-exempt interest (line 2a). The add-back is where people slip: municipal bond interest that felt tax-free still counts toward IRMAA. A retiree living on muni income can cross a threshold without ever seeing taxable income rise.
Source: Yahoo Finance Top News — This article was automatically imported from the source. Read full article at original source →
