Medicare Part D
2027 Medicare IRMAA Brackets: When Higher Income Means Higher Premiums
PASO ROBLES, Calif. — If you're on Medicare and your income has climbed in recent years — maybe from a Roth conversion, a home sale, or a strong year of investment gains — 2026 is the year to double-check where you sit on the IRMAA ladder. The income-related surcharges that ride on top of standard Part B and Part D premiums start above $109,000 for a single filer in 2026 (twice that for a married couple filing jointly), and they're set by the income you reported two years earlier.
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Key takeaways
- In 2026, IRMAA surcharges kick in above $109,000 in income for single filers or $218,000 for married couples filing jointly, based on income reported two years earlier.
- IRMAA is an added charge on top of standard Part B and Part D premiums, not a separate bill or penalty, and most people on Medicare never pay it.
- If a life event like retirement, losing a spouse, or divorce lowered your income, you can ask Social Security to recalculate your surcharge using Form SSA-44 instead of your two-year-old tax return.
- IRMAA isn't permanent, so if your income drops the following year, your surcharge drops too, though it still follows a two-year lag.
Paso Robles retirees: here's how the 2027 IRMAA thresholds will work
For folks here in Paso Robles, that means your 2025 tax return is what Social Security will look at to decide your 2027 premium.
What IRMAA actually is
IRMAA stands for the Income-Related Monthly Adjustment Amount. It isn't a separate bill or a penalty for doing something wrong — it's an added amount tacked onto your monthly Part B premium and your Part D premium if your income is above certain thresholds.
Two things worth knowing up front:
- IRMAA applies to both Part B and Part D, even if your drug coverage comes through a Medicare Advantage plan or a standalone Part D plan.
- It's based on your modified adjusted gross income (MAGI) from two years ago. So 2027 surcharges look back to your 2025 tax return.
Most people on Medicare do not pay IRMAA at all. It only kicks in once income crosses the first bracket.
The 2026 income thresholds
For 2026, the first IRMAA bracket begins above $109,000 in MAGI for a single filer, and above $218,000 for a married couple filing jointly. From there, the brackets step up in tiers, with the highest surcharges reserved for the top income levels (roughly $500,000-plus for single filers, $750,000-plus for joint filers).
If you file as married filing separately and you lived with your spouse during the year, the rules are stricter — the surcharge can begin at a much lower income level.
The exact monthly surcharge amounts for each tier are published by CMS at medicare.gov. The 2027 brackets and surcharge amounts are typically announced later in the fall alongside the Part B figures — check medicare.gov for the authoritative numbers once released.
Why Paso Robles readers should pay attention this fall
Paso Robles is in San Luis Obispo County, where property values and retirement income patterns mean a fair number of households sit right on the edge of the first IRMAA bracket. A one-time event — selling a vineyard, cashing out an inherited IRA, converting a traditional IRA to a Roth — can push a normally middle-income retiree over the line for a single year.
Two practical points:
1. IRMAA is not permanent. If your income drops back down the following year, your surcharge drops with it (again, on a two-year lag). 2. Life-changing events can be appealed. If you retired, lost a spouse, divorced, or had another qualifying event that cut your income, you can ask Social Security to recalculate using your current income instead of the two-year-old return. The form is SSA-44.
How this fits into the rest of 2027 Medicare
IRMAA is one piece of the 2027 picture. A few other program-level facts worth keeping in mind while you review your coverage during Annual Enrollment (Oct. 15 – Dec. 7, 2026) for coverage starting Jan. 1, 2027:
- Part D has a hard out-of-pocket cap on covered drugs: $2,100 in 2026 and $2,400 in 2027.
- The Part D maximum deductible is $615 in 2026 and $700 in 2027.
- The old coverage gap (the "donut hole") is gone — Part D now has three phases.
- The Medicare Prescription Payment Plan lets you spread your drug costs across the year in level monthly payments instead of paying big amounts at the pharmacy counter.
None of these change your IRMAA number, but they do change how much you'll actually spend out of pocket, which is often the real question behind "am I in the right plan?"
What to do if you get an IRMAA letter
Social Security mails IRMAA determination letters in late fall. If one shows up in your Paso Robles mailbox:
- Read it carefully. It will tell you which tax year they used and which bracket they placed you in.
- Check the math. Compare the MAGI they used to your actual 2025 return.
- If you had a life-changing event, file SSA-44 with documentation. Common qualifying events include work stoppage, work reduction, marriage, divorce, death of a spouse, loss of pension income, or loss of income-producing property.
- If you simply disagree, you have the right to request reconsideration.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
By the numbers
How people get Medicare in San Luis Obispo County
(MA penetration in San Luis Obispo County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
Higher-income surcharges
2026 IRMAA income brackets
If your income is above a threshold, you pay an income-related surcharge (IRMAA) on top of your Part B and Part D premiums. Your 2027 surcharge is based on your 2025 tax return. CMS publishes the 2027 bracket amounts and surcharges later in the fall.
| Income — single filer | Income — married, joint | Part B monthly premium | Part D surcharge |
|---|---|---|---|
| $109,000 or less | $218,000 or less | $202.90 | Plan premium only |
| $109,001 – $137,000 | $218,001 – $274,000 | $284.10 | + $14.50 |
| $137,001 – $171,000 | $274,001 – $342,000 | $405.80 | + $37.40 |
| $171,001 – $205,000 | $342,001 – $410,000 | $527.50 | + $60.40 |
| $205,001 – $500,000 | $410,001 – $750,000 | $649.30 | + $83.30 |
| Above $500,000 | Above $750,000 | $689.90 | + $91.00 |
Standard Part B premium is $202.90/month. Part D surcharges are added to your drug plan’s premium. Married-filing-separately uses a different, compressed schedule. Confirm current amounts at Medicare.gov.
Try it
Find your 2026 Medicare premium
Most people pay the standard Part B premium. If your 2024 income was higher, an income-related surcharge (IRMAA) applies. Enter your details to see your bracket.
Surcharges are added to your premiums and based on your 2024 tax return. Married-filing-separately uses a different schedule. Confirm at Medicare.gov.
Try it
How the 2026 Part D drug cap works
Slide to your estimated yearly prescription costs and see how the new $2,100 out-of-pocket cap protects you. This illustrates the standard Part D benefit; your plan may structure costs differently.
Once your out-of-pocket spending on covered drugs reaches $2,100, you pay nothing more for the rest of 2026. Confirm details at Medicare.gov.
Good to know
Frequently asked questions
Q: I just barely crossed $109,000 in 2024. Will I owe IRMAA all year in 2026?
Q: My spouse died last year and our joint income was high. Do I still owe the couple's IRMAA?
Q: Does IRMAA apply if I have a Medicare Advantage plan instead of Original Medicare?
- CMS — Medicare costs & IRMAA (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.