CMS says roughly 8% of people with Part B pay an income-related adjustment, and about 8% of people with Part D do too. For affected beneficiaries, the 2026 Part B IRMAA runs $81.20 to $487.00 a month, and the Part D surcharge runs $14.50 to $91.00.
If a retirement, divorce, or spouse's death cut your income, you may be able to ask for a lower amount. This guide covers how IRMAA works, which events qualify, how to complete Form SSA-44, what to gather, and what to do if you're denied.
Key Takeaways
- IRMAA adds to Part B and Part D costs, based on tax data from two years back.
- A lower-income year alone doesn't qualify; a listed event must cause the drop.
- The SSA-44 process: confirm the event, estimate income, gather proof, submit, track.
- Agents can explain plan implications, but Social Security decides the adjustment.
How IRMAA Costs Typically Build Up
IRMAA is rarely one bill. It can raise your Part B premium and add a separate Part D surcharge. There is no Part A IRMAA; most people get premium-free Part A.
Why the cost lingers after income drops
For 2026, SSA normally uses your 2024 tax return. If the IRS can't supply that, SSA may fall back to 2023. SSA reviews your income every year, but it won't automatically reflect a recent change like retirement.
Where you'll see the charges
- Part B: usually deducted from Social Security or Railroad Retirement benefits. If you pay directly, the CMS-500 bill includes it.
- Part D (standalone): deducted from benefits, or billed by Medicare if benefits are insufficient. Pay Medicare, not your drug plan.
- Medicare Advantage with drug coverage: Part D IRMAA still applies, under the same payment rules.
Part B premiums are indexed to income and the amounts change every year, so check your annual notice.
Key Cost Drivers for IRMAA
How SSA defines income
IRMAA uses MAGI: adjusted gross income plus tax-exempt interest. These are lines 11 and 2a of Form 1040, according to SSA's POMS guidance.
2026 brackets
The standard Part B premium is $202.90. Amounts below are monthly, per person.
| Single MAGI | Married filing jointly MAGI | Part B IRMAA | Part B total | Part D IRMAA |
|---|---|---|---|---|
| Up to $109,000 | Up to $218,000 | $0 | $202.90 | $0 |
| $109,000 to $137,000 | $218,000 to $274,000 | $81.20 | $284.10 | $14.50 |
| $137,000 to $171,000 | $274,000 to $342,000 | $202.90 | $405.80 | $37.50 |
| $171,000 to $205,000 | $342,000 to $410,000 | $324.60 | $527.50 | $60.40 |
| $205,000 to under $500,000 | $410,000 to under $750,000 | $446.30 | $649.20 | $83.30 |
| $500,000 or more | $750,000 or more | $487.00 | $689.90 | $91.00 |
Married people who file separately but lived with a spouse during the tax year face a harsher table. Above $109,000 they pay $446.30 in Part B IRMAA, and $487.00 at $391,000 or more.
Part B and Part D are assessed separately. Check the latest CMS publication, since figures change annually.
Cost-Reduction Strategies for IRMAA After a Life-Changing Event
Form SSA-44 fixes a timing mismatch: an old tax return versus a lower current income. It isn't a general way to lower IRMAA whenever income dips.
Confirm the event and the income drop
SSA-44 recognizes eight events:
- Marriage
- Divorce or annulment
- Death of a spouse
- Work stoppage
- Work reduction
- Loss of income-producing property
- Loss of pension income
- Employer settlement payment
The list is exclusive. Voluntary sale of property doesn't count, and neither does a one-time spike from capital gains, lottery winnings, or an IRA conversion.
Once you confirm a qualifying event, compare the income SSA used with realistic estimates for this year and next. Cover wages, pension, Social Security, investments, and retirement-account withdrawals.
Recent retirees have a clear path. SSA's POMS lists retirement as a work-stoppage example. Accepted proof includes an employer statement, a retirement letter, or your own attestation under penalty of perjury.
Complete the form
- Identify yourself and the event. Enter your name, your own Social Security number, the event, and its month and year. The event must fall in or before the tax year you request.
- Fill in Step 2. Give the requested tax year, actual or estimated AGI, tax-exempt interest, and filing status.
- Use Step 3 if next year looks lower still. Provide estimates for the following year.
- Attach proof and sign. Include event evidence and income documents, plus your phone number and mailing address.
If you leave out a next-year estimate, SSA uses your current-year estimate for the following year.
Gather documents by event
| Event | Typical evidence |
|---|---|
| Marriage | Marriage certificate or certified public record |
| Divorce or annulment | Certified decree |
| Death of spouse | Certified death certificate or public record |
| Work stoppage or reduction | Signed employer statement, pay stubs, business-transfer documents |
| Property loss | Insurance adjuster's statement or government letter |
| Pension loss | Plan administrator's letter |
| Employer settlement | Employer letter with bankruptcy court terms |
If your return is filed, send a signed copy or IRS transcript. If you're estimating, send the signed return once it's filed.
Submit, track, and appeal
Submit online through your SSA account, by mail or fax to a Social Security office, in person by appointment, or by phone at 800-772-1213 (TTY 800-325-0778). Keep copies and delivery records.
SSA later checks your figures against IRS data and adjusts IRMAA if they differ. An estimate isn't a permanent exemption.
If SSA denies you, request reconsideration within 60 days of receiving the notice. SSA presumes receipt five days after the notice date. Use Form SSA-561. Further levels run through an HHS Administrative Law Judge, the Medicare Appeals Council, and federal court.
Get help with complicated numbers
Bring in a tax professional if you have retirement-account distributions, capital gains, or a changed filing status. Each Medicare-enrolled spouse may need a separate request.
Muneris Benefits' licensed agents can help you see how IRMAA fits into broader Medicare plan choices, including Medicare Advantage, Medicare Supplement, and drug coverage. Social Security keeps the final say on any adjustment.
Conclusion
Lowering IRMAA depends on three things:
- A qualifying life-changing event
- Proof of the income drop
- Following SSA's current process
Cutting income or switching plans won't lower it on its own.
Review your IRMAA notice as soon as it arrives, gather your documents, and get tax or Medicare guidance if the numbers are murky. Thresholds, premiums, and procedures change, so confirm current rules before you file.
Frequently Asked Questions
How does IRMAA work?
SSA generally uses your tax return from two years earlier to measure MAGI. If it exceeds a threshold, you pay extra on Part B and Part D. Check current figures with SSA and CMS.
What are the 2026 IRMAA brackets for Medicare Part B?
For singles, IRMAA starts above $109,000 MAGI ($218,000 joint) at $81.20 a month, rising to $487.00 at $500,000 or more ($750,000 joint). Confirm against the latest CMS publication.
How do I appeal IRMAA?
Use SSA-44 for a life-changing event. If you think SSA's decision was wrong, file SSA-561 for reconsideration within 60 days of receiving the notice. Both go to Social Security.
What life-changing events qualify for an IRMAA reduction?
Marriage, divorce or annulment, a spouse's death, work stoppage, work reduction, loss of income-producing property, loss of pension income, and an employer settlement. The event must significantly reduce your income.
What documents do I need for Form SSA-44?
Proof of the event, such as a decree or employer letter, plus actual or estimated income details. Send a signed tax return or IRS transcript where applicable.
Can I lower IRMAA if I recently retired?
Yes. Retirement counts as work stoppage. Document it, and show your current or expected income is lower than what SSA used.
