How Does Income Affect Medicare Premiums: 2026 IRMAA Brackets

Your income affects Medicare premiums through a surcharge called the Income-Related Monthly Adjustment Amount, or IRMAA, which is added to your Part B and Part D premiums once your modified adjusted gross income crosses $109,000 for an individual or $218,000 for a couple filing jointly. The Social Security Administration sets the surcharge using your tax return from two years earlier, so what you pay in 2026 depends on what you earned in 2024.1Social Security Administration. Medicare Annual Verification Notices: Frequently Asked Questions In 2026, the Part B surcharge ranges from $81.20 to $487.00 per month on top of the standard $202.90 premium.2Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles

What IRMAA Is

IRMAA is not a separate plan or a tax. It is an addition to the standard monthly premium you already pay for Part B (medical insurance) and Part D (prescription drug coverage). The statute ties the surcharge to the share of Medicare costs the government subsidizes for you: as income rises, the government’s subsidy shrinks and your share grows.3Office of the Law Revision Counsel. 42 US Code 1395r – Amount of Premiums for Individuals Enrolled Under Part B

The Social Security Administration, not Medicare, decides whether you owe IRMAA. SSA pulls your income figures from the IRS, sorts you into a bracket, and sends a determination notice.2Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles If you already collect Social Security, the surcharge comes straight out of your monthly benefit. If you don’t collect yet, Medicare bills you directly.

The Income Figure SSA Uses

For IRMAA purposes, modified adjusted gross income equals your adjusted gross income from your federal return plus any tax-exempt interest.4Social Security Administration. Premiums: Rules for Higher-Income Beneficiaries That second piece trips people up. Municipal bond interest is free of federal income tax, but it still counts toward the IRMAA threshold. A retiree who chose munis for their tax-free status can find themselves paying a surcharge because of income that never showed up as taxable on the 1040.

Everything on your AGI line matters too: wages, pension payments, traditional IRA and 401(k) withdrawals, capital gains, rental income, and the taxable portion of Social Security benefits. Roth withdrawals, if qualified, do not count.

The 2026 Brackets and What You’ll Pay

IRMAA works on cliffs. A single dollar over a threshold moves you into the next tier at the full new rate. There is no gradual phase-in. The 2026 numbers below are set against your 2024 MAGI.2Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles

Part B

Standard 2026 premium: $202.90 per month.

  • $109,000 or less (individual) / $218,000 or less (joint): no surcharge; you pay $202.90.
  • $109,001–$137,000 / $218,001–$274,000: $81.20 surcharge, total $284.10.
  • $137,001–$171,000 / $274,001–$342,000: $202.90 surcharge, total $405.80.
  • $171,001–$205,000 / $342,001–$410,000: $324.60 surcharge, total $527.50.
  • $205,001–$499,999 / $410,001–$749,999: $446.30 surcharge, total $649.20.
  • $500,000 or more / $750,000 or more: $487.00 surcharge, total $689.90.

Part D

The Part D surcharge sits on top of whatever your drug plan already charges:

  • $109,000 or less / $218,000 or less: no surcharge.
  • $109,001–$137,000 / $218,001–$274,000: $14.50.
  • $137,001–$171,000 / $274,001–$342,000: $37.50.
  • $171,001–$205,000 / $342,001–$410,000: $60.40.
  • $205,001–$499,999 / $410,001–$749,999: $83.30.
  • $500,000 or more / $750,000 or more: $91.00.

At the top bracket, a single beneficiary pays roughly $9,370 a year in Part B premiums and surcharges alone, before adding Part D.

A Trap for Married Filing Separately

If you are married, lived with your spouse at any point during the tax year, and file separately, only two IRMAA tiers apply and the surcharge jumps almost immediately to a high level.5Medicare.gov. 2026 Medicare Costs

  • $109,000 or less: no surcharge.
  • $109,001–$390,999: $446.30 Part B surcharge and $83.30 Part D surcharge.
  • $391,000 or more: $487.00 Part B surcharge and $91.00 Part D surcharge.

Someone in this filing status earning $115,000 pays a $446.30 monthly Part B surcharge. The same person filing jointly with a spouse at a combined $230,000 would pay $81.20. If separate filing is on the table for other tax reasons, price the IRMAA hit first.

Why 2026 Uses 2024 Income

SSA doesn’t look at current income. It uses your MAGI from two years back, because it needs finalized IRS data rather than estimates.1Social Security Administration. Medicare Annual Verification Notices: Frequently Asked Questions The consequence: someone who retired early in 2025 after a strong 2024 will still pay 2026 surcharges based on that final working year. SSA requests IRS data each fall and mails determination notices before the new year starts.

Sometimes SSA has to reach back three years, usually because the two-year-old return hasn’t posted yet. When the correct data eventually arrives, SSA issues an updated notice and adjusts your premium.

If Your Income Has Dropped: Form SSA-44

The two-year look-back is not the last word. If a qualifying life-changing event has cut your income, you can ask SSA to use a more recent year, or your estimate of the current year, by filing Form SSA-44.6Social Security Administration. Medicare Income-Related Monthly Adjustment Amount – Life-Changing Event Form SSA-44 The qualifying events are:

  • Work stoppage or a significant reduction in work, including retirement or layoff.
  • Death of a spouse.
  • Marriage or divorce.
  • Loss of income-producing property through an event outside your control, such as a disaster, disease, or fraud. Selling property voluntarily does not count.
  • Loss of pension income because the plan was terminated or reorganized.
  • A settlement payment from a former employer’s bankruptcy or reorganization.

Each event has its own documentation: an employer letter or pay stubs for work stoppage, a certified death certificate, a certified divorce decree. You submit SSA-44 with the supporting documents to your local Social Security office by mail, fax, or in person, or through your online SSA account.7Social Security Administration. Request to Lower an Income-Related Monthly Adjustment Amount (IRMAA) If SSA approves the request, the lower premium often applies back to the month the event occurred or the start of the year.8Social Security Administration. POMS HI 01101.035 – Initial IRMAA Determination Notices

Managing MAGI to Stay Under a Threshold

Because the brackets are cliffs, staying a dollar under a threshold can save a full tier’s worth of surcharge for the whole year. A few levers matter more than the rest.

Qualified Charitable Distributions

At age 70½ or older, you can send distributions from a traditional IRA directly to a qualified charity. A qualified charitable distribution satisfies your required minimum distribution but stays out of gross income entirely, so it never enters the MAGI calculation.3Office of the Law Revision Counsel. 42 US Code 1395r – Amount of Premiums for Individuals Enrolled Under Part B Taking a normal IRA withdrawal and donating it does not achieve the same thing: the withdrawal adds to AGI first, and the deduction only helps if you itemize.

Roth Conversions Before Age 63

Qualified Roth withdrawals in retirement do not affect MAGI. But the year you convert traditional retirement money to a Roth, the converted amount is taxable income. Given the two-year look-back, a large conversion at 63 hits your Medicare premiums at 65. Doing conversions earlier, or spreading them across years to stay below the next IRMAA cliff, avoids that.

Timing Capital Gains and Lump Sums

Selling appreciated investments, exercising options, or taking a large pension lump sum spikes your AGI for that year. If you’re near or in Medicare, the tax year a transaction lands in becomes a Medicare decision, not only a tax decision. Sometimes bunching gains into one year is cheaper than spreading them; sometimes it’s the opposite. The arithmetic depends on where each year would leave you on the bracket ladder.

Tax-Exempt Interest Still Counts

Municipal bond interest doesn’t show up on your taxable income line, but it is added back to compute MAGI.4Social Security Administration. Premiums: Rules for Higher-Income Beneficiaries A large muni portfolio can push you across a threshold even when your 1040 looks modest.

If You Think the Determination Is Wrong

If SSA used the wrong tax year, missed an amended return, or should have applied a life-changing event, ask for a reconsideration within 60 days of the determination notice. You can file by calling SSA at 1-800-772-1213 or in writing.9Social Security Administration. Request Reconsideration Most disputes resolve at that stage. If the surcharge is correctly calculated and your income two years ago really was that high, an appeal won’t move the number; the SSA-44 path or income planning are the tools that will.