Medicare premiums can rise two years after a profitable seat-rights sale
A one-off capital gain can push modified adjusted gross income above Medicare thresholds, triggering higher Part B and Part D premiums after a two-year delay.

A profitable sale of long-held personal seat rights can lead to higher US Medicare Part B and Part D premiums two years later, according to Yahoo Finance. The increase occurs because Medicare generally uses tax information from two years earlier to calculate the income-related monthly adjustment amount, or IRMAA.
The relevant figure is modified adjusted gross income, rather than necessarily the full sale proceeds. For personal-use property, the taxable gain generally depends on the asset’s documented cost basis and the amount realised in the sale.
The source cites 2026 figures showing a standard Part B premium of $202.90 for a single filer with MAGI of $109,000 or less. Above that threshold, the Part B premium rises to $284.10, with an additional $14.50 a month for Part D. MAGI between $137,000 and $171,000 lifts Part B to $405.80 and the Part D surcharge to $37.50.
IRMAA is recalculated annually, meaning a one-off income spike will generally produce higher premiums for only one or two years if income subsequently returns to normal. The source does not establish the seller’s gain or the actual premium increase.
Voluntarily selling a personal asset generally does not qualify for an SSA-44 life-changing-event adjustment, according to the material. Before completing a sale, taxpayers should check purchase records and cost basis, assess other income and estimate whether the gain could push MAGI across an IRMAA threshold.


