An IRMAA notice can feel like a tax bill arriving through a health-insurance channel. It is neither a new income tax nor a penalty for earning too much. It is an income-related addition to Medicare Part B and Part D premiums, generally based on an older tax return. The practical question is not merely, “Did my income fall?” It is: Did a qualifying event reduce the modified adjusted gross income that SSA should use for the premium year, and can I document that request cleanly?
The CMS 2026 premium fact sheet sets the official numbers. The standard Part B premium is $202.90 a month in 2026. IRMAA begins above $109,000 of modified adjusted gross income for most individual filers and above $218,000 for married couples filing jointly. Approximately 8% of Part B enrollees are affected. Those thresholds and amounts are calendar-year facts; do not recycle a prior-year table.
First, identify what you are asking SSA to change
There are three common situations, and combining them in one vague letter creates delay.
| Situation | Best starting path | Core question |
|---|---|---|
| A listed life-changing event reduced income | SSA-44 / new initial determination | Can SSA use a more recent tax year or estimate? |
| The tax data, filing status, or identity is wrong | Reconsideration or correction route stated in the notice | Is the underlying fact inaccurate? |
| Income simply fluctuated without a listed event | Read the notice and contact SSA | Does another determination rule apply? |
The current SSA-44 is explicit: use it when you received an IRMAA notice, experienced a listed life-changing event, and the event caused income to decrease. The form lists marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of income-producing property, loss of pension income, and an employer settlement payment. A voluntary portfolio sale, a market decline, a large charitable gift, or simply spending less is not automatically one of those events.
SSA’s operating guidance says the reduction must be meaningful enough to decrease or eliminate IRMAA for the premium year. It also says the event and income reduction apply to the beneficiary who reports them; a spouse may need a separate request. Read that distinction in POMS HI 01120.005 before assuming one filing solves both spouses’ premiums.
Read the notice in five fields
Create a one-page intake sheet before calling anyone:
- Premium year: the year for which the surcharge applies.
- Tax year used: for 2026, the SSA-44 instructions say SSA generally requested 2024 information and may use 2023 if 2024 was unavailable.
- Filing status: single, head of household, qualifying surviving spouse, married filing jointly, or married filing separately.
- MAGI shown or implied: for IRMAA, this is adjusted gross income plus tax-exempt interest, not your paycheck, taxable income, or bank balance.
- Response path and deadline: follow the exact notice rather than relying on an article’s generic timeline.
Compare the notice with an IRS account or return transcript, not a screenshot from tax software. The IRS Get Transcript service explains available transcript types and delivery methods. Redact Social Security numbers from any planning worksheet you share with a non-SSA adviser.
Calculate the decision value before assembling a large packet
For a person with both Part B and Part D, the annual IRMAA exposure is:
12 × (monthly Part B adjustment + monthly Part D adjustment)
Using the official 2026 table, the combined monthly and annual adjustments for the five surcharge tiers are:
| Tier above the standard threshold | Part B IRMAA | Part D IRMAA | Combined monthly | Combined annual |
|---|---|---|---|---|
| 1 | $81.20 | $14.50 | $95.70 | $1,148.40 |
| 2 | $202.90 | $37.50 | $240.40 | $2,884.80 |
| 3 | $324.60 | $60.40 | $385.00 | $4,620.00 |
| 4 | $446.30 | $83.30 | $529.60 | $6,355.20 |
| 5 | $487.00 | $91.00 | $578.00 | $6,936.00 |
These are adjustments, not total health costs. They exclude the standard Part B premium, the plan-specific Part D premium, deductibles, Medigap or Medicare Advantage costs, and medical spending. The Medicare costs page is the right place to confirm broader cost categories.
Worked example. A single filer’s 2024 MAGI placed them in Tier 3. They retired in March 2026, and a good-faith 2026 MAGI estimate is $132,000, within Tier 1. The difference in combined adjustments is $385.00 minus $95.70, or $289.30 a month. Over 12 months, that is $3,471.60. This is an estimate of the premium difference if SSA accepts the inputs—not a promised refund, and not a reason to manipulate a tax estimate.
Build an evidence packet that answers four questions
A useful packet is short enough for a reviewer to audit.
1. What was the event?
Use third-party evidence tied to the listed event: a retirement or work-reduction letter, pay statements showing reduced hours, pension administrator notice, divorce decree, death certificate, or relevant property/insurance evidence. Do not send an entire medical record, bank history, or estate file when a narrower record establishes the event.
2. When did it happen?
Month and year matter because the form asks for dates and the causal sequence should be intelligible: event first, income reduction next. A resignation letter alone may not prove the final day worked; pair it with a final pay statement if appropriate.
3. What MAGI should SSA use?
Use a filed return when available. If the current-year return is not yet filed, SSA-44 allows an estimate. Build the estimate from expected adjusted gross income plus tax-exempt interest. Include wages, retirement distributions, taxable Social Security, capital gains, interest, dividends, business income, and other relevant return items. Then add tax-exempt interest.
Do not subtract the standard deduction from MAGI. Do not use gross household cash flow. If a Roth conversion, property sale, mutual-fund distribution, required minimum distribution, or severance payment could cross a threshold, model a range rather than choosing the most favorable point estimate.
4. Why is the estimate credible?
Attach only support that connects to material line items: year-to-date pay statements, pension or annuity notices, brokerage realized-gain summaries, Social Security benefit records, and a signed tax professional projection if one exists. Mark projections as estimates. Keep originals unless SSA specifically requests them.
Use a three-scenario MAGI worksheet
A single estimate hides uncertainty. Prepare low, base, and high cases.
| Input | Low | Base | High | Evidence source |
|---|---|---|---|---|
| Wages/severance | final pay estimate | |||
| Taxable retirement distributions | custodian schedule | |||
| Interest and dividends | year-to-date statement | |||
| Net capital gains | realized-gain report | |||
| Taxable Social Security | benefit estimate | |||
| Other AGI items | return workpaper | |||
| Tax-exempt interest | brokerage statement | |||
| Projected IRMAA MAGI | sum |
If the high case crosses a tier, explain the uncertainty. A $500 difference near a threshold can change premiums far more than it changes income tax. That “cliff” makes precise source records important, but it does not justify omitting income.
For withdrawal planning around Medicare thresholds, pair this worksheet with our retirement tax-bucket withdrawal-order guide. For quarterly tax mechanics after a work stoppage or large distribution, use the estimated-tax safe-harbor guide. IRMAA and estimated tax are separate systems even when they use overlapping income data.
Special filing-status trap: married filing separately
IRMAA treatment can be severe for a married person who files separately and lived with a spouse during part of the tax year. If you filed separately but lived apart for the entire year, do not assume SSA can infer that from the return. POMS HI 01120.060 describes the attestation and evidence process and says the change applies only to the person making the attestation.
This is also why an article cannot tell you to change filing status. Filing status affects income tax, credits, state returns, Medicare premiums, and sometimes other benefits. Ask a tax professional to compare the complete household result.
Submission and follow-up checklist
- Read every page of the notice and the current SSA-44 instructions.
- Confirm the premium year, tax year, filing status, and MAGI.
- Check that the event is on SSA’s list.
- Reconcile the MAGI estimate to source records.
- Include event evidence and income evidence, not unrelated sensitive material.
- Keep a dated copy of everything submitted.
- Record the office, submission method, and any confirmation number.
- Recheck the next benefit statement and bank deduction.
- Update SSA if the estimate materially changes.
If your issue is not a life-changing event request, SSA’s reconsideration page describes the general first appeal step. Do not wait for an article to resolve a deadline shown on your notice.
The 2026 Medicare & You handbook remains a useful cross-check for program contacts and rights. Keep the government sources with your worksheet because thresholds, forms, and contact paths can change.
What this worksheet cannot decide
It cannot determine whether a transaction belongs in AGI, whether a divorce or property-loss fact pattern satisfies SSA rules, whether an amended return will control, or whether a Roth conversion is worthwhile. It also cannot promise retroactive adjustment timing. Those questions may require SSA, Medicare, a CPA or enrolled agent, and—where legal rights are disputed—qualified counsel.
FAQ
Does retirement automatically remove IRMAA?
No. Work stoppage is a listed event, but SSA still evaluates the event, income reduction, and evidence. A retiree with a large capital gain or conversion may remain above a threshold.
Is SSA-44 the same as an appeal?
No. It requests a new initial determination after a qualifying life-changing event. A reconsideration disputes a decision or fact through a different procedural path.
Which income year drives 2026 IRMAA?
The current SSA-44 says SSA generally used 2024 tax information for 2026 and may have used 2023 when 2024 was unavailable. Your notice is the controlling starting point.
A clean IRMAA request is not about sending the most paper. It is about making the chain auditable: notice → qualifying event → lower MAGI → correct tier → concise evidence → verified follow-up. That same discipline should also guide the broader Social Security claiming-age decision, where household consequences matter more than a single headline number.