Medicare Part D
How 2025 income can raise 2027 Medicare bills in Zachary
Zachary, La. — With Medicare's fall Annual Enrollment Period running Oct. 15 through Dec. 7, retirees across East Baton Rouge Parish are checking mail from Social Security and finding a familiar surprise: a higher Part B or Part D bill tied to income from two years ago. If your 2025 tax return showed higher earnings — from a home sale, a Roth conversion, or steady wages while working past 65 — you may see an income-related surcharge in 2027.
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Key takeaways
- Medicare's fall Annual Enrollment Period runs Oct. 15 through Dec. 7, and your 2027 Part B or Part D premium can be higher if your 2025 income was above certain limits.
- For 2026, the extra IRMAA charge starts for single filers earning more than $109,000 and married couples filing jointly earning more than $218,000, with the highest tier at $500,000 for singles and $750,000 for joint filers.
- If your income has dropped due to a life-changing event like retirement, a spouse's death, divorce, or a work stoppage, you can file form SSA-44 with Social Security to ask for a recalculation.
- Part D drug coverage has a $2,400 out-of-pocket cap in 2027 and a maximum deductible of $700, and you can also opt into the free Medicare Prescription Payment Plan to spread drug costs into monthly installments.
Here's what those thresholds look like, and what Zachary readers should know before making enrollment decisions this season.
What IRMAA is, in plain English
IRMAA stands for the Income-Related Monthly Adjustment Amount. It's an extra charge that gets added to your standard Part B premium and, if you have Part D drug coverage, to your Part D premium too.
Most people pay only the standard Part B premium. But if your income is above a set threshold, Medicare adds a surcharge on top. The Social Security Administration bases this on your most recent tax return on file — for 2027, that generally means your 2025 income.
The 2026 income thresholds
For 2026, the surcharge kicks in for single filers with modified adjusted gross income above $109,000, and for married couples filing jointly above $218,000. Below those numbers, you pay only the standard premiums.
Above those thresholds, IRMAA is tiered. The higher your income, the higher the added amount for both Part B and Part D. The top tier applies to single filers with income at or above $500,000 and joint filers at or above $750,000.
You can find the full 2026 tier chart at medicare.gov/basics/costs.
Why some Zachary retirees get hit unexpectedly
A few local patterns come up again and again:
- Selling a home. Zachary's housing market has been active, and a big capital gain in 2025 can push income over a threshold for 2027, even if you're back to a normal retirement income now.
- Working past 65. Many folks at the hospital, refineries, or in local schools keep working while enrolled in Medicare. That W-2 income counts.
- Roth conversions or a large IRA withdrawal. These add to your MAGI for the year they happen.
The good news: IRMAA is set year-by-year. A one-time income bump doesn't follow you forever.
If your income has dropped, you can appeal
If you've had a "life-changing event" — retirement, the death of a spouse, divorce, loss of pension income, or a work stoppage — you can ask Social Security to recalculate using more recent numbers. The form to use is SSA-44, "Medicare Income-Related Monthly Adjustment Amount – Life-Changing Event."
You'll need documentation (a letter from an employer, a death certificate, a divorce decree). You can submit it by mail, in person, or through your local Social Security office. The closest full-service office to Zachary is in Baton Rouge.
What this means during Annual Enrollment
IRMAA is a Medicare-wide charge — it doesn't change based on which Part D plan or Medicare Advantage plan you pick. But two things are worth knowing this fall:
1. Part D has a $2,400 out-of-pocket cap in 2027, along with a maximum deductible of $700. The old "donut hole" coverage gap is gone — drug coverage now has three phases. 2. The Medicare Prescription Payment Plan lets you spread drug costs across the calendar year in monthly installments instead of paying big pharmacy bills all at once. It's optional and free to opt into through your Part D plan.
Zachary is in East Baton Rouge Parish, where a range of stand-alone Part D and Medicare Advantage plans are available. Comparing them on medicare.gov/plan-compare using your specific medication list is the most reliable way to see your actual costs.
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 East Baton Rouge Parish
(MA penetration in East Baton Rouge Parish)
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 announces the 2027 brackets and surcharge amounts 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 retired in 2025. Why is Medicare using my 2024 income?
Q: Does IRMAA apply if I only have Part A?
Q: Do Medicare Advantage plans avoid IRMAA?
- CMS — Medicare costs & IRMAA (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.