Information checked: 2026-09-10 · Maintenance label: Annual variable values
The 2027 income-related monthly adjustment amounts have not been released as of 10 September 2026. Any 2027 bracket table circulating now is a projection, not an official figure.
What you can act on today is the mechanism: IRMAA is set from a tax return filed two years earlier, and if your income has since fallen for a qualifying reason, there is a form that fixes it prospectively rather than an appeal you win years later.
This guide covers the confirmed 2026 brackets, when the 2027 numbers appear, and the difference between Form SSA-44 and a reconsideration request — which is the distinction most people get wrong.
Key takeaway
IRMAA is an extra amount added to Part B and Part D premiums, calculated from the modified adjusted gross income on a tax return from two years earlier. 2027 amounts are not yet published; CMS releases them in its annual Parts A & B premiums fact sheet. If a qualifying life-changing event has already reduced your income, file Form SSA-44 for a new initial determination. If you think the determination itself is wrong, that is a reconsideration request instead.
Table of contents
- Why 2027 numbers do not exist yet
- The confirmed 2026 brackets
- Which tax year sets your premium
- Form SSA-44 and the qualifying life-changing events
- SSA-44 or a reconsideration: not the same thing
- Frequently asked questions
- Summary
Why 2027 numbers do not exist yet
CMS publishes the standard Part B premium, the Part B deductible and the full IRMAA table for the coming year in a single annual fact sheet released in the autumn. Until that release, there is no official 2027 figure to plan around.
Projections published by financial sites are estimates built on inflation assumptions. They are not the numbers Social Security will use, and a bracket boundary that moves by a few hundred dollars decides real money for a household sitting close to a threshold.
Two practical consequences. First, do not make an irreversible income decision for 2027 on a projected bracket. Second, watch for the CMS fact sheet and the Social Security notice that follows it, rather than relying on a secondary summary.
The official figuresCMS Medicare Parts A and B premiums fact sheet ›CMS publishes the standard premium, the deductible and the full IRMAA table here each year. This is where the next year's numbers appear first.The confirmed 2026 brackets
For 2026 the standard Part B premium is $202.90 per month and the annual Part B deductible is $283. IRMAA is added on top of that standard premium, and a separate amount is added to your Part D premium.
| Individual MAGI | Joint MAGI | Part B added | Part D added |
|---|---|---|---|
| $109,000 or less | $218,000 or less | $0.00 | $0.00 |
| Over $109,000 to $137,000 | Over $218,000 to $274,000 | $81.20 | $14.50 |
| Over $137,000 to $171,000 | Over $274,000 to $342,000 | $202.90 | $37.50 |
| Over $171,000 to $205,000 | Over $342,000 to $410,000 | $324.60 | $60.40 |
| Over $205,000 to under $500,000 | Over $410,000 to under $750,000 | $446.30 | $83.30 |
| $500,000 or more | $750,000 or more | $487.00 | $91.00 |
Married filing separately has its own two-step structure: no adjustment at $109,000 or less, $446.30 for Part B and $83.30 for Part D above $109,000 and below $391,000, and $487.00 and $91.00 at $391,000 or more.
Notice the shape of it. IRMAA is a cliff, not a taper. One dollar over a boundary moves you to the next row for the whole year, on both Part B and Part D.
Which tax year sets your premium
Social Security uses the most recent federal tax return the IRS has provided to it. In practice that is the return from two years earlier — a 2026 determination generally rests on the 2024 tax year, reported on the return filed in 2025.
This two-year lag is the source of most IRMAA complaints. Someone who retired last year is billed on the income of the year before they retired, when they were still working.
The lag also means planning has a long lead. Income realised in 2026 — a Roth conversion, a property sale, a large distribution — is what determines a 2028 premium.
Form SSA-44 and the qualifying life-changing events
If a life-changing event has reduced your income since the tax year being used, you can ask Social Security for a new initial determination using Form SSA-44 rather than waiting two years for the lower income to show up on its own.
The events Social Security recognises include:
- Marriage, divorce or annulment, or the death of a spouse
- You or your spouse stopped working or reduced hours
- Loss of income-producing property because of a disaster or other event beyond your control
- A scheduled cessation, termination or reorganisation of an employer's pension plan
- A settlement from an employer because of the employer's closure, bankruptcy or reorganisation
Retirement is the common one, and it is worth being precise: the event that matters is the work stoppage or reduction, and the form asks you to state the date and to give an estimate of the reduced income with evidence.
If your income already droppedSSA Medicare premiums and Form SSA-44 ›The qualifying life-changing events, the form that reports them, and how to ask for reconsideration. Free, and no service can file it faster.SSA-44 or a reconsideration: not the same thing
| Form SSA-44 | Reconsideration | |
|---|---|---|
| What it says | My income has changed because of a qualifying life-changing event | The determination you made is wrong |
| Typical trigger | Retirement, reduced hours, divorce, widowhood, pension or settlement events | Wrong tax year used, amended return, IRS data error |
| Form | SSA-44 | Request for Reconsideration, Form SSA-561-U2 |
Filing the wrong one wastes months. If nothing about your situation changed and you simply disagree with the figure Social Security used, that is a reconsideration. If your income genuinely dropped for one of the listed reasons, that is SSA-44.
Both are free. Neither requires a paid service, and no service can make Social Security decide faster.
Frequently asked questions
What are the 2027 IRMAA brackets?
They have not been released. CMS publishes the coming year's Part B premium, deductible and IRMAA table in its annual fact sheet in the autumn. Figures circulating now are projections.
What income does IRMAA use?
The modified adjusted gross income on the most recent federal tax return the IRS has supplied to Social Security — in practice, the return from two years earlier.
I just retired. Do I have to pay IRMAA on my old salary?
A work stoppage or reduction in hours is a qualifying life-changing event. Form SSA-44 asks Social Security to make a new initial determination using your reduced income.
What is the difference between SSA-44 and an appeal?
SSA-44 reports a life-changing event that lowered your income. A reconsideration request, Form SSA-561-U2, argues that the determination itself is wrong.
Does IRMAA phase in gradually?
No. The brackets are steps. Crossing a boundary by any amount moves you to the next tier for both Part B and Part D.
Summary
There is no official 2027 IRMAA table yet. Watch the CMS annual fact sheet and the Social Security notice that follows, and treat projections as projections.
If your income has already fallen because you retired, cut your hours, divorced, were widowed, or lost pension or property income, Form SSA-44 is the tool. If the determination itself is wrong, ask for reconsideration instead.
- CMS, 2026 Medicare Parts A and B Premiums and Deductibles — The 2026 standard Part B premium and deductible and the full 2026 Part B and Part D IRMAA tables
- Social Security Administration, Medicare premiums — Which tax return sets IRMAA, the qualifying life-changing events, Form SSA-44 and the reconsideration route