Medicare 2026
Turning 65 and Still on the Job? Your Medicare Timing Guide
Plenty of people in Pocatello are working well past 65 these days — and that raises a fair question: do you have to sign up for Medicare right away, or can you stick with your job's health plan? The answer depends on the size of your employer, how your current coverage works, and a few deadlines that are easy to miss.
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Key takeaways
- If your employer has 20 or more employees, your job's plan usually stays primary and you can often delay Part B without penalty.
- If your employer has fewer than 20 employees, Medicare typically becomes primary at 65, so enrolling on time matters.
- You get an 8-month Special Enrollment Period to sign up for Part B after your job or employer coverage ends.
- For personalized help, contact Idaho SHIBA (Idaho's SHIP program), medicare.gov, or 1-800-MEDICARE.
Here's a plain-language walk-through to help you decide.
First, know what "still working" changes
Turning 65 opens your Initial Enrollment Period for Medicare — a seven-month window around your birthday month. Most people should at least sign up for Part A (hospital insurance) during that time, because for most workers it costs no premium.
Part B (doctor visits and outpatient care) is the piece that gets trickier when you have job-based coverage. Part B has a monthly premium, so many people wonder whether to take it now or wait.
The key factor is your employer's size.
The 20-employee rule
Medicare uses a simple size test to decide which insurance pays first:
- 20 or more employees: Your employer plan generally pays first, and Medicare is secondary. You can usually delay Part B until you retire or lose coverage — without a late penalty later.
- Fewer than 20 employees: Medicare generally pays first once you turn 65. If you don't enroll in Part B, your employer plan may pay very little, leaving you with big bills.
If you work for a smaller Pocatello employer, ask your HR or benefits contact — in writing — whether the plan expects you to take Medicare at 65. This one question can prevent a very expensive surprise.
Special Enrollment Period: your safety net
When your job ends, or your employer coverage ends, you get a Special Enrollment Period (SEP) of 8 months to sign up for Part B without a late penalty. COBRA and retiree coverage do not count as active employer coverage for this rule, so don't rely on them to keep the SEP clock paused.
Missing this window can mean a Part B late enrollment penalty that sticks with you for life — 10% added to your premium for every 12 months you could have been enrolled but weren't.
What about HSAs?
If you're contributing to a Health Savings Account through work, know this: once you enroll in any part of Medicare, including Part A, you can no longer contribute to your HSA. You can still spend what's already in it.
Some workers delay Medicare entirely to keep making HSA contributions. Others enroll in Part A only. It's worth a call to your tax advisor before you decide.
Part D and prescription drugs
If your job's plan includes drug coverage, check whether it's considered "creditable" — meaning it's at least as good as standard Medicare Part D. Your employer is required to send you a notice each year telling you this. Keep it.
If your coverage is creditable, you can delay Part D without penalty. If it isn't, and you go more than 63 days without creditable coverage, you'll owe a lifetime Part D late enrollment penalty when you eventually sign up.
The Part D out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027. The maximum Part D deductible is $615 in 2026 and $700 in 2027. There's also an optional Medicare Prescription Payment Plan that lets you spread drug costs across the year in monthly installments.
A quick note on availability in Bannock County
Pocatello is in Bannock County, where Medicare Advantage and Part D plan options are set at the county level. If and when you're ready to compare what's offered locally, the plan finder at medicare.gov lets you search by ZIP code.
Where to get unbiased help
Medicare decisions tied to a job are personal, and the "right" answer depends on your paycheck, your family's coverage, and your health. Free, unbiased help is available:
- Medicare.gov — official rules, deadlines, and the plan finder tool
- 1-800-MEDICARE (1-800-633-4227) — 24/7 phone help
- Idaho SHIBA (Senior Health Insurance Benefits Advisors) — Idaho's SHIP program, offering free one-on-one Medicare counseling
- Your employer's HR or benefits office — for how your specific plan coordinates with Medicare
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 Bannock County
(MA penetration in Bannock 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.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
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The parts of Medicare
Good to know
Frequently asked questions
Do I have to sign up for Medicare at 65 if I'm still working?
Is COBRA considered employer coverage for Medicare purposes?
Can I keep contributing to my HSA after I enroll in Medicare?
How do I know if my employer drug coverage counts as "creditable"?
- CMS — Medicare basics (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Pocatello
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This page was last updated: September 29, 2026.