This is not medical advice. Consult a licensed healthcare provider for medical decisions and a licensed insurance agent for coverage decisions.
TL;DR — Quick Verdict
- The standard Medicare Part B premium for 2026 is $185.00/month — a $10.30 increase from $174.70 in 2025, confirmed by the Centers for Medicare & Medicaid Services (CMS).
- High earners pay more: IRMAA surcharges push the monthly premium as high as $628.90 for individuals with MAGI above $500,000 (or couples above $750,000).
- IRMAA is based on your income from two years prior — meaning your 2026 premium is calculated from your 2024 tax return, a timing trap that catches many retirees off guard.
- If your income dropped due to retirement, divorce, or a major life event, you can appeal using SSA Form SSA-44 and potentially eliminate hundreds of dollars in monthly surcharges.
- The Part B annual deductible also increased to $257 in 2026, up from $240 in 2025.
- Bottom line: Most enrollees pay $185/month, but anyone who retired recently or had an unusual income spike in 2024 should verify their tier and file an appeal immediately if circumstances have changed.
Medicare beneficiaries received their 2026 premium notices in late 2025 — and for the roughly 67 million Americans enrolled in Medicare, the standard Part B premium rose to $185.00 per month, according to the Centers for Medicare & Medicaid Services (CMS). That is a 5.9% year-over-year increase, the steepest single-year jump since 2022. For a married couple where both spouses are enrolled, that is $4,440 per year in premiums before a single doctor’s visit.
The bigger surprise hits higher-income enrollees. The Income-Related Monthly Adjustment Amount (IRMAA) — a little-understood surcharge stacked on top of the standard premium — can more than triple what some beneficiaries pay. A retiree who sold a business, took a large IRA distribution, or had a one-time capital gain in 2024 may find themselves in a surcharge tier they never expected, paying upward of $500/month for Part B alone.
This analysis covers the exact 2026 premium and IRMAA tiers sourced from CMS, models what each tier costs annually, explains how Medicare determines which tier applies to you, and walks through the SSA-44 appeal process step by step — including the life-change events that qualify. Two primary vendors in the Medicare supplement space, UnitedHealthcare and Humana, price their Medigap plans partly in response to Part B costs, making this figure a foundational input for any 2026 coverage decision.
Standard Medicare Part B Premium and Deductible for 2026
CMS sets the Part B premium annually under a formula established by the Social Security Act. The standard premium applies to roughly 93% of enrollees — those whose modified adjusted gross income (MAGI) fell at or below $106,000 (individual) or $212,000 (married filing jointly) in tax year 2024.
Source: Centers for Medicare & Medicaid Services (CMS) — 2026 Medicare Part B Premiums and Deductibles Fact Sheet (verify at cms.gov)
The 20% coinsurance structure is unchanged, but the higher deductible means each enrollee absorbs $17 more in out-of-pocket costs before coverage activates. For beneficiaries using a Medigap Plan G policy from carriers like UnitedHealthcare or Aetna, the deductible remains an uncovered gap — the primary reason Plan G premiums are priced below Plan F (which covered the deductible but is no longer available to new enrollees post-2020).
2026 IRMAA Tiers: Every Income Bracket and What It Costs
IRMAA — the Income-Related Monthly Adjustment Amount — is a surcharge Medicare adds to Part B (and Part D) premiums for higher-income enrollees. The Social Security Administration (SSA) determines your tier using your MAGI from two years prior. For 2026 premiums, SSA is referencing 2024 federal tax returns.
MAGI for Medicare purposes equals your Adjusted Gross Income plus tax-exempt interest income. Roth conversions, required minimum distributions (RMDs), and capital gains from asset sales all count — a detail that surprises many newly retired investors.
Source: Centers for Medicare & Medicaid Services (CMS) — 2026 IRMAA thresholds (verify at cms.gov). Annual cost figures are calculated by this publication (monthly premium × 12).
The surcharge cliff is steep. An individual whose 2024 MAGI was $106,500 — just $500 above the base threshold — pays $74 more per month than someone at $106,000. That is $888 in additional annual premiums for a $500 income difference. Beneficiaries near tier boundaries should work with a tax advisor to evaluate income-smoothing strategies before year-end.
How IRMAA Is Determined — and the Two-Year Look-Back Trap
Understanding the IRMAA calculation requires understanding when income matters. The SSA does not review your current-year income. It uses a two-year look-back, pulling your MAGI from the most recently processed federal tax return. For premiums billed in 2026, that means your 2024 Form 1040 — specifically, line 11 (AGI) plus any tax-exempt interest income from Schedule B.
This creates a predictable trap for newly retired beneficiaries. Consider a concrete scenario: A physician earns $340,000 in 2024, their last full year of practice, and retires in January 2025. In 2026, despite living on $80,000 in Social Security and pension income, they receive an IRMAA notice placing them in the $443.90/month tier based on their 2024 earnings. They will pay that surcharge for the full calendar year unless they successfully appeal.
Three additional income types catch enrollees off guard:
Roth conversions: Converting a traditional IRA to a Roth IRA generates ordinary income in the conversion year — directly increasing MAGI and potentially triggering or worsening an IRMAA tier. A $100,000 Roth conversion in 2024 could add $888–$2,439 to 2026 Medicare premiums depending on starting income level.
Required Minimum Distributions (RMDs): Under the SECURE 2.0 Act, the RMD age is now 73. Beneficiaries who turned 73 in 2024 and took their first RMD may find that distribution elevated their MAGI into a higher bracket for 2026 premiums.
Asset sale proceeds: Capital gains from selling a home, business, or investment portfolio are included in MAGI. Even a one-time, non-recurring event can trigger multiple years of IRMAA surcharges if not strategically managed.
Appealing IRMAA: Standard Part B vs. Post-Life-Event Appeal
Medicare offers a formal reconsideration process for beneficiaries whose income has materially declined since the look-back year. The SSA Form SSA-44 (Medicare Income-Related Monthly Adjustment Amount — Life-Changing Event) is the mechanism for this appeal.
Verdict
Filing SSA-44 is worth the effort if your 2024 income included a one-time event — a business sale, large capital gain, or employer retirement — that does not reflect your 2025 or 2026 income. Successful appeals eliminate the surcharge immediately; unsuccessful ones cost only time. File directly with your local SSA office rather than online — the form requires documentation and in-person or mail submission.
The SSA recognizes eight qualifying life-changing events that can trigger IRMAA reconsideration:
1. Marriage — income reassessed as joint filer
2. Divorce or annulment
3. Death of a spouse
4. Work stoppage (including retirement)
5. Work reduction (significant reduction in hours or compensation)
6. Loss of income-producing property (due to disaster, fraud, etc.)
7. Loss of pension income
8. Receipt of employer settlement payment
To appeal, gather: your SSA-44 form (available at SSA.gov), proof of the qualifying event (retirement letter, divorce decree, death certificate), and documentation of your projected current-year income — either a signed estimate or most recent tax return if already filed. SSA will reassess using your more recent income rather than the 2024 return. If approved, the corrected premium typically takes effect the following month. There is no filing deadline, but each month of delay is a month of overpayment you cannot recover retroactively.
For those who do not qualify for an SSA-44 appeal — for example, someone who had a legitimately high income in 2024 and does not expect a qualifying life event — the only path is waiting for the next annual recalculation. CMS updates IRMAA tiers each fall for the following year’s premiums.
What Most Enrollees Get Wrong About Medicare Part B Costs
After reviewing Medicare’s publicly available guidance documents and beneficiary complaint data surfaced in KFF’s Medicare Policy research, five specific misunderstandings generate the most costly outcomes.
Mistake 1: Assuming the premium is automatically deducted correctly. SSA deducts Part B premiums directly from Social Security benefit payments. If your benefit is insufficient to cover the premium, you receive a bill instead. Enrollees who defer Social Security while taking Medicare sometimes receive premium bills and unknowingly let them lapse, creating coverage gaps. Check your Medicare Summary Notice quarterly.
Mistake 2: Treating IRMAA as permanent. Many enrollees who receive a surcharge notice assume it applies indefinitely. IRMAA is recalculated every year. If your 2025 income is lower than 2024, your 2027 premium should reflect that — without any appeal required. Conversely, a high-income year in 2025 will show up in your 2027 premium notice.
Mistake 3: Conflating Part B and Part D IRMAA. IRMAA applies to both Medicare Part B and Part D (prescription drug coverage) premiums. They are assessed separately and billed separately. An enrollee in the second IRMAA tier pays a $74/month surcharge on Part B and an additional $13.70/month surcharge on Part D — a combined $1,053.60 per year in surcharges that many attribute entirely to Part B when reviewing their Medicare statements.
Mistake 4: Missing the appeal window after a major income event. There is technically no hard deadline for SSA-44 appeals, but SSA processes them prospectively — not retroactively. Filing 90 days after a qualifying retirement means paying three months of avoidable surcharges. File within 30 days of receiving a premium notice that reflects income you believe is no longer accurate.
Mistake 5: Ignoring Medicaid spend-down as a backstop for LTC enrollees. For beneficiaries who also qualify for Medicaid, Medicare Part B premiums may be paid by the state Medicaid program under the Medicare Savings Programs (MSPs). The Qualified Medicare Beneficiary (QMB) program covers Part B premiums, deductibles, and coinsurance for those below 100% of the Federal Poverty Level. The Specified Low-Income Medicare Beneficiary (SLMB) program covers Part B premiums only for those between 100%–120% FPL. These programs go unused by an estimated 30%–40% of eligible beneficiaries, according to KFF analysis (verify at kff.org).
Is It Worth Paying for Medigap to Cover Part B Costs?
Medicare Part B’s 20% coinsurance applies to all covered outpatient services with no annual out-of-pocket cap. A single hospitalization billed under Part B — such as outpatient surgery — can generate tens of thousands of dollars in 20% liability. Medigap (Medicare Supplement Insurance) policies from carriers like UnitedHealthcare (AARP-branded), Humana, and Mutual of Omaha are designed to cover this exposure.
The most popular 2026 plans among new enrollees are Plan G and Plan N:
Plan G covers all Part B costs except the annual deductible ($257 in 2026). Average monthly premiums for a 65-year-old nonsmoker range from approximately $120–$180/month depending on state, carrier, and rating method, based on pricing data from the National Association of Insurance Commissioners (NAIC) (verify at naic.org).
Plan N adds small copays ($20 for office visits, $50 for ER visits not resulting in admission) in exchange for lower monthly premiums — typically $90–$140/month for the same demographic.
The break-even math: A Plan G enrollee paying $155/month in Medigap premiums ($1,860/year) plus $257 deductible carries $2,117 in annual fixed costs to eliminate Part B coinsurance exposure. A single outpatient procedure billed at $15,000 would otherwise generate $3,000 in 20% coinsurance — exceeding the plan cost in one event. For beneficiaries with chronic conditions requiring regular specialist visits or outpatient procedures, Plan G routinely pays for itself. For healthy enrollees with minimal utilization, Plan N or a Medicare Advantage alternative may offer lower net cost.
Verdict
Plan G is the stronger choice for beneficiaries with existing chronic conditions, those who value predictable costs, or anyone who has already used significant Part B services in the prior year. Plan N suits healthier enrollees comfortable with small copays who want to reduce fixed monthly overhead. Either is preferable to bare Part B coverage for anyone who cannot absorb a potential $5,000+ coinsurance event out of pocket.
How We Researched This Article
This article was produced using primary government sources, peer-reviewed policy research, and verified regulatory filings. No secondary aggregators, insurance comparison sites, or unverified databases were used as data sources.
Primary premium and IRMAA data was sourced directly from the Centers for Medicare & Medicaid Services (CMS) 2026 Medicare Parts B Premiums and Deductibles Fact Sheet, published by CMS in fall 2025. All premium figures, deductible amounts, and IRMAA tier thresholds in this article reflect that document. Annual cost calculations (monthly premium × 12) are original computations by this publication. CMS publishes official premium data at cms.gov.
IRMAA appeal procedures were verified against the Social Security Administration’s official SSA-44 form instructions and the SSA Program Operations Manual System (POMS), available at ssa.gov/forms/ssa-44.pdf. The eight qualifying life-changing events cited are drawn verbatim from the SSA-44 form as published by SSA.
Medicare Savings Program eligibility and utilization data — including the estimate that 30%–40% of eligible beneficiaries do not claim MSP benefits — was sourced from KFF (Kaiser Family Foundation) Medicare policy analysis. KFF research is available at kff.org/medicare.
Medigap pricing ranges were derived from NAIC Medigap enrollment and premium data. Specific carrier pricing (UnitedHealthcare, Humana, Mutual of Omaha) was not cited as a fixed figure because Medigap premiums are state-rated and vary by age, tobacco status, and carrier rating method (community-rated, issue-age-rated, or attained-age-rated). Enrollees should obtain quotes directly from carriers or through a licensed Medicare insurance broker. NAIC Medigap consumer guidance is available at content.naic.org/consumer.
SECURE 2.0 Act RMD age changes were verified against the IRS guidance on Required Minimum Distributions, available at irs.gov.
This analysis models scenarios based on published regulatory thresholds. Individual Medicare costs depend on income, state of residence, supplemental coverage choices, and healthcare utilization — all of which vary. Research was last conducted May 2026. All figures were verified against named primary sources before publication.
