Medicare Costs & Retirement Planning
Understanding Medicare IRMAA: How Income Can Affect Your Premiums
Medicare IRMAA can increase what some beneficiaries pay for Medicare Part B and Part D. Here is how the income rules, two-year lookback and life-changing event process work.
When most people think about Medicare costs, they focus on premiums, deductibles and copayments. But another factor can quietly increase the monthly cost: the Income-Related Monthly Adjustment Amount, commonly called IRMAA.
IRMAA is not a separate plan, a late-enrollment penalty or an insurance-company charge. It is an income-related amount added to Medicare Part B and Medicare Part D costs when a beneficiary’s income exceeds federal thresholds.
The rules are federal, which means they apply in Florida and throughout the United States.
Medicare IRMAA Explained
What Is Medicare IRMAA?
IRMAA is an additional monthly amount some people pay because their income is above a federally established threshold.
Medicare Part B
IRMAA is added to the standard monthly Part B premium.
Medicare Part D
Part D IRMAA is paid in addition to the premium charged by the beneficiary’s Medicare drug plan or Medicare Advantage plan with drug coverage.
Who decides whether IRMAA applies?
The Social Security Administration generally uses federal tax information supplied by the IRS to determine whether a beneficiary owes IRMAA.
IRMAA does not apply to Medicare Part A premiums, Medigap premiums or the premium charged directly by a Medicare Advantage plan.
Need a broader Medicare foundation first? Review the RobinsWisdom Medicare Basics guide .
Current Medicare Costs
When Does IRMAA Begin in 2026?
For 2026, most beneficiaries pay the standard Medicare Part B premium when their modified adjusted gross income is at or below the applicable starting threshold.
Individual tax return
$109,000
IRMAA begins when 2024 MAGI is greater than this amount.
Married filing jointly
$218,000
IRMAA begins when combined 2024 MAGI is greater than this amount.
2026 Part B premium
The standard Medicare Part B premium is $202.90 per month in 2026. Beneficiaries in an IRMAA bracket pay the standard premium plus an additional income-related amount.
Separate threshold rules apply to certain people who are married, lived with their spouse during the tax year and file separate tax returns. Income thresholds and premium amounts are updated annually.
Modified Adjusted Gross Income
What Income Counts Toward IRMAA?
For IRMAA purposes, modified adjusted gross income generally means:
Income reported on a federal tax return may therefore affect the calculation. Depending on the person’s circumstances, that can include income from:
- Wages and self-employment
- Pensions and retirement distributions
- Required minimum distributions
- Taxable Social Security benefits
- Capital gains
- Rental and investment income
- Interest and dividends
- Tax-exempt interest
IRMAA is not based on net worth
The value of a home, savings account or investment portfolio does not by itself determine IRMAA. What matters is the income reflected in the applicable federal tax information.
Tax rules can be complicated. A qualified tax professional can explain how a specific transaction may affect adjusted gross income and IRMAA MAGI.
The Rule That Surprises Retirees
How Does the IRMAA Two-Year Lookback Work?
Social Security generally uses tax information from two years before the Medicare premium year.
Income earned
Income is reported on the beneficiary’s 2024 federal tax return.
Medicare premium year
SSA generally uses the 2024 tax information to determine 2026 IRMAA.
This is why someone can be retired and living on substantially less income today but still receive an IRMAA notice based on a higher-income working year.
If two-year-old information is unavailable from the IRS, Social Security may temporarily use information from three years earlier.
Income Events to Watch
What Can Trigger Medicare IRMAA?
IRMAA may apply when MAGI rises above one of the federal income thresholds. The higher the income bracket, the higher the Part B and Part D adjustment may be.
Common transactions that may increase MAGI include:
Roth conversions
The taxable portion of a conversion can increase adjusted gross income.
Large retirement withdrawals
Distributions from tax-deferred retirement accounts may increase taxable income.
Capital gains
Selling investments, property or a business may create reportable gains.
Required minimum distributions
RMDs may push total income into a higher IRMAA bracket.
Investment income
Interest, dividends and other investment income may affect MAGI.
High-income working years
Earnings shortly before retirement may affect Medicare premiums two years later.
IRMAA uses bracket-style thresholds
Moving even slightly above a threshold can place a beneficiary into the next IRMAA tier. That is why income timing deserves attention before a major financial decision.
When Income Has Decreased
Can Medicare IRMAA Be Lowered?
Possibly. A beneficiary can ask Social Security to use more recent income information when a qualifying life-changing event causes a significant reduction in MAGI.
Social Security recognizes eight life-changing events:
Marriage
Divorce or annulment
Death of a spouse
Work stoppage
Work reduction
Loss of income-producing property
Loss or reduction of pension income
Employer settlement payment
Retirement and IRMAA
“Retirement” is commonly used in conversation, but the recognized Social Security event is generally a work stoppage or work reduction that causes income to decrease.
Beneficiaries may use Medicare Form SSA-44 and Social Security’s IRMAA process to request that SSA consider more recent income information. Supporting evidence of the event and reduced income may be required.
Approval is not automatic. Social Security reviews the event, income reduction and documentation before making a new determination.
Plan Before You React
Why IRMAA Planning Matters
IRMAA is not a late-enrollment penalty. It is an income-related adjustment to Medicare Part B and Part D costs.
Still, it can feel like a penalty when it arrives unexpectedly. Decisions made before or during retirement may affect Medicare premiums two years later.
Before making a major income decision, consider discussing:
- The timing and size of Roth conversions
- Capital gains from selling investments or property
- Retirement-account withdrawals and future RMDs
- The timing of retirement or reduced work hours
- How filing status may affect IRMAA thresholds
- Whether several transactions will occur in the same tax year
Medicare agents do not provide tax or investment advice. A coordinated conversation with a qualified tax or financial professional can help a person understand how a proposed transaction may affect taxable income and future Medicare costs.
Medicare Help in Florida
How Does IRMAA Affect Florida Residents?
IRMAA thresholds are federal. Florida does not have separate Medicare IRMAA brackets, exemptions or appeal rules.
The two-year lookback can be especially important for Florida residents who recently:
- Retired and moved to Florida
- Sold a home, business or investment property
- Completed a large Roth conversion
- Left a high-income position
- Reduced work hours before or after age 65
Reviewing the income timeline before Medicare begins can help anticipate whether IRMAA may apply. It does not eliminate the surcharge, but it can replace an unpleasant surprise with a plan.
Understanding premiums is only one piece of Medicare planning. You can also review Medicare enrollment periods and timing rules to avoid missing an important enrollment window.
Not Sure What Comes Next?
Medicare Costs Deserve More Than a Guess
If you are approaching Medicare, retiring soon or trying to understand how IRMAA fits into your coverage decisions, I can help explain the Medicare side of the equation.
No call centers. No 1-800 numbers. Just Robin.
Frequently Asked Questions
Questions About Medicare IRMAA
What does IRMAA stand for in Medicare?
IRMAA stands for Income-Related Monthly Adjustment Amount. It is an additional amount certain higher-income beneficiaries pay for Medicare Part B and Medicare Part D.
How is Medicare IRMAA calculated?
Social Security generally uses modified adjusted gross income from the federal tax return two years before the Medicare premium year. For IRMAA purposes, MAGI generally equals adjusted gross income plus tax-exempt interest.
Is IRMAA recalculated every year?
Yes. Social Security determines IRMAA for each premium year using the applicable tax information and annual income thresholds. A person may move into, out of or between IRMAA brackets as the information changes.
Does IRMAA apply to both spouses?
IRMAA is charged per Medicare beneficiary. A joint tax return may place both spouses in the same income bracket, but each spouse enrolled in Part B or Part D is assessed individually.
Can retirement lower Medicare IRMAA?
A work stoppage or work reduction that significantly lowers income may qualify a beneficiary to ask Social Security to use more recent income information. The request is commonly made using Form SSA-44 with supporting evidence.
Can a Roth conversion trigger IRMAA?
The taxable portion of a Roth conversion may increase adjusted gross income and could affect a future IRMAA determination. A tax professional can evaluate the effect of a proposed conversion on the person’s specific tax return.
Is IRMAA the same as a Medicare penalty?
No. IRMAA is an income-related premium adjustment. It is separate from Medicare Part B and Part D late-enrollment penalties.
Official Sources
- Centers for Medicare & Medicaid Services: 2026 Medicare Parts A and B Premiums and Deductibles
- Social Security Administration: Request to Lower an Income-Related Monthly Adjustment Amount
- Social Security Administration: Modified Adjusted Gross Income and IRMAA Thresholds
- Medicare.gov: Paying Medicare Premiums and IRMAA
