Short answer
IRMAA is a Medicare premium add-on tied to income from an earlier tax return.
Base Part B premium
$202.90/mo
CMS lists the standard 2026 Part B premium at $202.90 per month.
Source trail: CMS
First single threshold
Over $109K
CMS shows the first 2026 IRMAA tier beginning above $109,000 for single filers.
Source trail: CMS
First joint threshold
Over $218K
CMS shows the first 2026 IRMAA tier beginning above $218,000 for married couples filing jointly.
Source trail: CMS
Review path
SSA-44
SSA explains that certain life-changing events can support a request for a new IRMAA decision.
Source trail: SSA.gov
A neutral way to read IRMAA is this: it is not a separate tax bill, but it can raise monthly Medicare premiums for a full year when income crosses a line.
Free quick estimate
Check a 2026 IRMAA bracket
Enter filing status and MAGI to see the CMS 2026 premium tier before putting the number into the full plan.
Free to use here. Save it to your map when you want the full road.
Medicare generally looks at income from two tax years earlier. For 2026 premiums, that usually means 2024 MAGI.
2026 table result
Live estimate
No IRMAA
This MAGI is below the first 2026 IRMAA threshold of $218,000 for this filing status.
This saves the table check as a map note. The full map still recalculates IRMAA from income, taxes, withdrawals, and Medicare age.
Neutral landscape
The shape of the question
The premium table starts with CMS. The 2026 CMS fact sheet gives the standard Part B premium and the income-related monthly adjustment amounts for higher-income beneficiaries.
Source trail: CMS
The income lookback starts with SSA. SSA explains that higher-income Medicare premium amounts are generally based on tax-return information from two years earlier.
Source trail: SSA.gov
The income number can come from normal retirement choices. IRS distribution rules, Roth conversion income, capital gains, work income, and Social Security taxation can all change the tax return that Medicare later reviews.
Source trail: IRS: Publication 590-B: Distributions from Individual Retirement Arrangements, IRS: Roth IRAs, IRS: Publication 915: Social Security and Equivalent Railroad Retirement Benefits, IRS: Tax Inflation Adjustments
The review path also has a source trail. SSA explains the life-changing event request process and points people to Form SSA-44 context.
Source trail: SSA.gov
Curator core
What the authorities say
These sources are here for the reader who wants to check the work. The plain-English answer stays above them.
Source 01
CMS
2026 Medicare Parts A & B Premiums and Deductibles
CMS publishes the official 2026 Part B premium, deductible, and income-related monthly adjustment tables.
Source framing
CMS is the official source for the 2026 standard Part B premium and the income-related monthly adjustment amounts.
Strongest for: 2026 Part B premium and IRMAA brackets
Read at CMSSource 02
SSA.gov
Medicare Premiums
SSA explains higher-income Medicare premium adjustments, income lookbacks, and how tax-return income is used.
Source framing
SSA explains that higher-income Medicare beneficiaries can pay additional Part B and Part D premium amounts.
Strongest for: income lookback and SSA premium notices
Read at SSA.govSource 03
SSA.gov
Request to Lower an Income-Related Monthly Adjustment Amount
SSA explains how certain life-changing events can support a request for a new IRMAA decision.
Source framing
SSA is the official source for life-changing event review of an income-related monthly adjustment amount.
Strongest for: life-changing event review and Form SSA-44 context
Read at SSA.govSource 04
Medicare.gov
Medicare Costs
Medicare.gov explains premiums, deductibles, copayments, coinsurance, and cost vocabulary.
Source framing
Medicare.gov is the consumer source for Medicare cost categories and premium terms.
Strongest for: Medicare cost vocabulary
Read at Medicare.govSource 05
Medicare.gov
Medicare & You 2026
The official Medicare handbook explains Medicare costs, coverage choices, annual updates, and where to check current premium amounts.
Source framing
Medicare & You is the official consumer handbook for Medicare coverage, costs, and annual plan choices.
Strongest for: consumer-facing Medicare context
Read at Medicare.govSource 06
IRS
Publication 590-B: Distributions from Individual Retirement Arrangements
Publication 590-B is the IRS source for IRA distributions, Roth ordering rules, and required minimum distributions.
Source framing
IRS Publication 590-B explains distribution rules that matter after money leaves an IRA.
Strongest for: RMDs, Roth distribution rules, and IRA withdrawals
Read at IRSSource 07
IRS
Publication 915: Social Security and Equivalent Railroad Retirement Benefits
Publication 915 explains the federal combined-income test for taxable Social Security benefits.
Source framing
IRS uses combined income and filing status to determine whether part of a Social Security benefit is taxable.
Strongest for: federal taxation of Social Security benefits
Read at IRSSource 08
IRS
Tax Inflation Adjustments
The IRS annual inflation adjustment release is the primary source for federal brackets, standard deductions, and selected thresholds.
Source framing
IRS updates tax brackets, standard deductions, and many tax thresholds each year for inflation.
Strongest for: current federal tax-year thresholds
Read at IRSPlain-English forks
The forks people face
Most retirement questions hide a few smaller decisions. These are the practical pieces that change the plan.
Which filing status applies?
Why it matters: The CMS table has different income thresholds for single, joint, and married-filing-separately tax returns.
In real life: This can make one person's timing matter for the other person's future income too.
What to look at: Use the CMS 2026 table first.
Which tax year is Medicare reviewing?
Why it matters: The premium year and income year are not usually the same year.
In real life: This changes the gap between money in an account and money the household can actually spend.
What to look at: Use SSA Medicare premium guidance for the lookback rule.
What income pushed the return higher?
Why it matters: IRA distributions, Roth conversions, wages, capital gains, and taxable Social Security can all land on the same return.
In real life: This changes when checks begin, how large they are, and how much pressure stays on savings in the early years.
What to look at: Use IRS distribution, Social Security, and annual tax sources.
Was there a life-changing event?
Why it matters: SSA lists events that can support a request for a new decision when income has dropped.
In real life: This is money that may arrive before selling savings, so it can lower the amount the map needs from withdrawals.
What to look at: Use SSA lower-IRMAA guidance.
Common questions
Quick answers
Short, plain answers for the questions people usually have next. The source trail stays available below.
What does IRMAA stand for?+
IRMAA stands for income-related monthly adjustment amount. SSA and CMS use it for higher-income Medicare premium adjustments.
Which Medicare parts can have IRMAA?+
SSA explains that higher-income beneficiaries can pay added amounts for Medicare Part B and Part D.
What is the standard Part B premium in 2026?+
CMS lists the standard 2026 Part B premium at $202.90 per month.
What income year is used for 2026 premiums?+
SSA guidance explains that Medicare generally uses tax-return information from two years earlier, so 2026 premiums usually look back to 2024 income.
Can a Roth conversion affect IRMAA?+
A Roth conversion can add taxable income for that tax year under IRS rules. That income can matter if it appears on the return Medicare later reviews.
Can IRMAA be reviewed after retirement income drops?+
SSA explains that certain life-changing events can support a request for a new IRMAA decision.
Is IRMAA the same as income tax?+
No. IRMAA is a Medicare premium adjustment, but it is triggered by income reported on a tax return.
How this page is curated
This page uses the CMS 2026 Medicare premium table, SSA Medicare premium and life-changing event guidance, Medicare.gov consumer cost sources, and IRS tax sources that explain income appearing on the return.
Read the planner methodologyTrust anchor
Sources used on this page
Every source named above is listed here in one place.
CMS. 2026 Medicare Parts A & B Premiums and Deductibles
https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductiblesIRS. Publication 590-B: Distributions from Individual Retirement Arrangements
https://www.irs.gov/publications/p590bIRS. Publication 915: Social Security and Equivalent Railroad Retirement Benefits
https://www.irs.gov/publications/p915IRS. Tax Inflation Adjustments
https://www.irs.gov/newsroom/irs-releases-tax-inflation-adjustments-for-tax-year-2026-including-amendments-from-the-one-big-beautiful-billMedicare.gov. Medicare Costs
https://www.medicare.gov/basics/costs/medicare-costsMedicare.gov. Medicare & You 2026
https://www.medicare.gov/publications/10050-medicare-and-you.pdfSSA.gov. Medicare Premiums
https://www.ssa.gov/benefits/medicare/medicare-premiums.htmlSSA.gov. Request to Lower an Income-Related Monthly Adjustment Amount
https://www.ssa.gov/medicare/lower-irmaa
Before you act on this
This plan is educational. It is not personalized financial, tax, or insurance advice. Projections illustrate the math, they do not predict the future. Talk to your own licensed financial professional before acting on any of it.