Medicare IRMAA
Medicare IRMAA (Income-Related Monthly Adjustment Amount) is a surcharge added to standard Medicare Part B and Part D premiums for beneficiaries whose modified adjusted gross income exceeds certain thresholds, causing higher-income retirees to pay significantly more for Medicare coverage than lower-income counterparts.
The standard 2024 Medicare Part B premium is $174.70 per month. However, beneficiaries whose MAGI two years prior (2022 income affects 2024 premiums, due to the two-year lookback) exceeded $103,000 for individuals or $206,000 for joint filers pay additional IRMAA surcharges that increase the total premium in five tiers, reaching as high as $594.00 per month for individuals with MAGI above $500,000. Part D drug plan premiums carry a parallel IRMAA structure.
The two-year lookback is a critical planning consideration. A retiree who takes a large Roth conversion, sells a business, or receives a large capital gain distribution in 2024 may see IRMAA surcharges applied in 2026, even if their ordinary income in 2026 is modest. This creates what planners call a Medicare cliff — a situation where an additional dollar of income can trigger several thousand dollars of additional annual premiums.
Beneficiaries who experience a qualifying life event that caused income to drop — such as retirement, divorce, death of a spouse, or loss of income-producing property — can request a redetermination using more recent income by filing Form SSA-44 with the Social Security Administration. This allows retirees to appeal IRMAA determinations based on outdated higher income.
Common strategies to manage IRMAA include spacing Roth conversions across multiple tax years rather than converting large amounts in a single year, using qualified charitable distributions from IRAs to satisfy charitable goals without increasing MAGI, harvesting capital gains in years with lower income, and coordinating the timing of retirement account distributions and Social Security claiming to smooth income across the two-year lookback window.