Do you pay IRMAA forever?
No. An IRMAA determination covers exactly one premium year, January through December, and expires with it. Social Security builds the next year's decision over again from the newest available return, so a large capital gain on a 2024 return lifts premiums for 2026 and for no later year; when 2027 arrives, SSA starts over with the 2025 return and whatever thresholds apply to 2027. The surcharge disappears as soon as a determination reads a return sitting at or under that year's first threshold, which for 2026 means 2024 MAGI no higher than $109,000 for a single filer or $218,000 on a joint return. There is no lifetime surcharge status, and nothing carries forward from one year to the next.
How long does IRMAA last?
Twelve months per determination. Here is the full arc of a single spike in income, with the years attached to every step:
| Year | What SSA reads | Effect of the 2024 spike |
|---|---|---|
| 2024 | The spike lands on the 2024 tax return | None yet; 2024 premiums were set from 2022 income |
| 2025 | The 2023 return | Still none; the spike is not in that return |
| 2026 | The 2024 return | First-tier surcharge of $95.70 per month, if MAGI crossed into tier 1 |
| 2027 | The 2025 return | Standard premium again, provided 2025 MAGI is under the 2027 thresholds |
Lookback rule: SSA POMS HI 01101.010. Surcharge amounts: CMS 2026 fact sheet.
In dollars, that 2026 first-tier year costs $1,148.40 per person: $81.20 for Part B and $14.50 for Part D, times 12 months. The 2027 thresholds will not be final until CMS announces them in fall 2026; our working numbers are on the 2027 projections page.
Do you have to wait two years for it to stop?
Usually, but not always. The default exit is the lag itself: income drops, the lower return moves through the pipeline, and the surcharge ends two years behind the income. The faster exit is Form SSA-44. After a qualifying life-changing event, most often retirement, SSA accepts a forward-looking MAGI figure for the year underway and drops the surcharge prospectively instead of waiting for the return to catch up.
The catch sits in what qualifies. SSA's rules shut out one-time income spikes by name: Roth and IRA conversions, realized capital gains, lottery winnings. For those, the two-year wait is real and no form shortens it.
Can IRMAA come back after it stops?
Yes. Any later return that crosses that later year's threshold restarts the surcharge for that year, against thresholds that themselves move with inflation. The yearly redo is covered on the is IRMAA calculated every year page.
Can IRMAA be effectively permanent?
No permanent status exists anywhere in the rules, but income that repeats produces a surcharge that repeats. Required minimum distributions, pensions, and the taxable slice of Social Security all flow into MAGI year after year (the MAGI page lists every item that counts). A retiree whose recurring income stays above the thresholds re-earns the surcharge annually, which feels permanent even though each year is a separate decision.
The distinction matters because recurring income responds to planning where a past spike cannot. The guide to keeping MAGI under the thresholds covers what actually moves the number, and the IRMAA calculator handles the tier lookup for any year's MAGI.
Duration questions people ask
How many years does IRMAA last?
One year per determination, renewed only when the next return also crosses the next year's threshold. Three straight high-income returns mean three surcharged years; one means one.
Is IRMAA permanent?
No. Nothing in the rules attaches a surcharge to a person for good. It attaches to a tax return, and every premium year swaps in a newer return.
The one-year scope and lookback rule trace to SSA POMS HI 01101.010; the life-changing-event list and its exclusions to POMS HI 01120.005; the 2026 dollar figures to the CMS fact sheet published November 14, 2025.