Medicare Supplement

2026 Medicare IRMAA Brackets: What Higher Earners in Las Vegas Owe

By the numbers

Las Vegas retirees, here's what changes on your 2026 Medicare bill

LAS VEGAS — If your income is above average, your 2026 Medicare premiums will look a little different than your neighbor's. The Centers for Medicare & Medicaid Services (CMS) uses an income-related monthly adjustment amount — known as IRMAA — to charge higher earners more for Part B (doctor visits, outpatient care) and Part D (prescription drugs). For 2026, the first IRMAA tier kicks in above $109,000 in income for a single filer, and above $218,000 for a married couple filing jointly.

If that sounds like it could apply to you, this guide walks through how the brackets work, why the IRS gets involved, and what to do if your income has recently dropped.

What IRMAA actually is (and isn't)

IRMAA is not a tax and it's not a penalty. It's an add-on to your standard Medicare premium if the IRS says you earned above a certain threshold. Most people on Medicare pay only the standard Part B premium and whatever their Part D plan charges. But roughly the top 8% of Medicare enrollees pay an extra amount on top of that — sometimes a little, sometimes a lot — based on income.

Two important points many Las Vegas readers miss:

• IRMAA is billed separately from your Part D plan premium. You pay your plan its normal premium, and Medicare bills you (or deducts from Social Security) for the IRMAA piece.
• IRMAA is recalculated every year. A one-time income spike — selling a house, cashing out an IRA — can push you into a bracket for a single year and then drop you back out.

How Medicare decides which bracket you're in

Here's the part that surprises people: your 2026 IRMAA is based on your 2024 tax return. Medicare uses your Modified Adjusted Gross Income (MAGI) from two years back because that's the most recent finalized IRS data available.

MAGI = your adjusted gross income + tax-exempt interest (like muni bond interest). It's not the same number as your take-home pay or your Social Security benefit.

The 2026 IRMAA income brackets

For 2026, single filers pay a Part B and Part D surcharge if their 2024 MAGI was above $109,000. Married couples filing jointly cross the first threshold above $218,000. From there, the surcharges climb through five tiers, with the highest tier reserved for singles above roughly $500,000 and couples above $750,000.

A few things to know about the tiers:

• The exact dollar amount of the surcharge is set each fall by CMS. The income thresholds are what determine which tier you fall in.
• Married-filing-separately has its own, much tighter schedule — one that starts far lower than the joint schedule.
• Both the Part B and Part D surcharges use the same income brackets, but they're two separate add-on amounts.

For the current-year dollar figures, the most reliable source is medicare.gov's "Costs" page.

If your income has dropped, you can appeal

This is the part Las Vegas readers most often don't hear about. If you had a life-changing event since your 2024 tax year, you can ask Social Security to use more recent income instead. Qualifying events include:

• Retirement or reduced work hours
• Death of a spouse
• Divorce or marriage
• Loss of pension or other income
• Loss of income-producing property (not due to your own fault)

You file Form SSA-44 with the Social Security Administration and include proof. If approved, your IRMAA is recalculated using the more recent year. This matters especially for people who just retired in 2024 or 2025 — their old working-year income shouldn't be pricing their Medicare in retirement.

The rest of the 2026 drug-cost picture

Even if IRMAA applies to you, the broader 2026 drug rules are the same for everyone on Part D:

• $2,100 out-of-pocket cap on covered Part D drugs.
• Part D deductibles can't exceed $615.
• The old "donut hole" coverage gap is gone as of 2025 — Part D now runs in three phases.
• The Medicare Prescription Payment Plan lets you spread drug costs across the year in monthly installments instead of paying big bills at the pharmacy counter. It's optional and free to opt into.

What Las Vegas enrollees should do this fall

Las Vegas is in Clark County, where Medicare beneficiaries can compare available Part D and Medicare Advantage options during the Annual Enrollment Period, October 15 through December 7. Even if you can't change your IRMAA, you can change the underlying plan the surcharge attaches to. If you decide after January 1 that you want to switch Medicare Advantage plans (or drop back to Original Medicare), the Medicare Advantage Open Enrollment Period runs January 1 through March 31.

A quick checklist:

1. Pull your 2024 tax return and locate your MAGI. 2. Check the 2026 IRMAA thresholds on medicare.gov. 3. If a life-changing event has cut your income, download Form SSA-44. 4. Use Medicare's Plan Finder at medicare.gov/plan-compare to review your drug coverage before December 7.