Medicare 2026
Missed Your Medicare Sign-Up? Here's What It Costs Forever
AVONDALE, Ariz. — If you're turning 65 soon, or helping a parent who is, there's one Medicare rule worth tattooing on your calendar: sign up on time. Miss the window for Part B (doctor visits) or Part D (prescription drugs), and you could pay a penalty every single month — for as long as you have Medicare. That's not a one-time fine. It's a lifetime add-on to your premium.
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Key takeaways
- The Part B late penalty adds 10% to your monthly premium for each full 12-month period you could have had Part B but didn't — and it usually lasts for life.
- The Part D late penalty is roughly 1% of the national base beneficiary premium for every month you went without creditable drug coverage after becoming eligible.
- Your Initial Enrollment Period is a 7-month window around your 65th birthday; missing it without other qualifying coverage is what triggers most penalties.
- If you or a spouse are still working and have job-based coverage, you may qualify for a Special Enrollment Period and avoid penalties — but you have to act within 8 months of losing that coverage.
The good news? These penalties are almost entirely avoidable once you know how the deadlines work.
How the Part B penalty works
Part B covers doctor visits, outpatient care, and preventive services. Most people should enroll during their Initial Enrollment Period — the 7 months that includes the 3 months before your 65th birthday, your birthday month, and the 3 months after.
If you don't sign up then, and you don't have other qualifying coverage (like insurance from a current employer), the penalty is 10% added to your Part B premium for each full 12-month period you were eligible but didn't enroll. That surcharge stays with you the entire time you have Part B.
Example: If you waited three full years to enroll without a valid reason, your premium would be 30% higher — permanently.
How the Part D penalty works
Part D covers prescription drugs. To avoid a penalty, you generally need to have "creditable" drug coverage — coverage at least as good as standard Medicare Part D — starting when you first become eligible.
If you go 63 days or more without creditable coverage after your Initial Enrollment Period ends, Medicare calculates a penalty of about 1% of the "national base beneficiary premium" for each month you went uncovered. That amount is added to your Part D premium going forward, and it can rise as the base premium changes.
The fix is simple: either enroll in a Part D plan when you're first eligible, or keep proof that any other drug coverage you have (from a job, union, or the VA, for example) counts as creditable.
The Avondale angle: what's available locally
Avondale is in Maricopa County, where Medicare beneficiaries have a wide range of stand-alone Part D and Medicare Advantage options to choose from during enrollment periods. The specific number of plans and carriers changes each year, and you can compare them side-by-side using the Plan Finder at Medicare.gov.
The important point for penalty purposes isn't which plan you pick — it's that you pick something (or have other creditable coverage) before your deadline passes.
When you get more time: Special Enrollment Periods
Not everyone has to enroll at 65. If you or your spouse is still working and you're covered by that employer's health plan, you can usually delay Part B and Part D without penalty.
Once that job-based coverage ends, you generally have:
- 8 months to sign up for Part B without a penalty.
- 63 days to get creditable drug coverage to avoid a Part D penalty.
COBRA and retiree coverage do not count as active employer coverage for the Part B rule, which trips up a lot of people. If you're relying on either one, talk with Medicare before your birthday.
2026 and 2027 numbers worth knowing
Even after you're safely enrolled, a few figures shape what you'll pay:
- The Part D out-of-pocket cap is $2,100 in 2026 — once you hit that, you pay $0 more for covered drugs the rest of the year.
- The maximum Part D deductible is $615.
- The old "donut hole" is gone as of 2025; Part D now has three simpler phases.
- The Medicare Prescription Payment Plan lets you spread your drug costs across the year in monthly payments — free to opt into.
- IRMAA surcharges (higher premiums for higher incomes) kick in above $109,000 for single filers in 2026.
Key dates to circle
- Initial Enrollment Period: the 7 months around your 65th birthday.
- Annual Enrollment Period: Oct. 15 – Dec. 7 each year, to change Part D or Medicare Advantage plans.
- Medicare Advantage Open Enrollment: Jan. 1 – March 31, to switch or drop an Advantage plan.
- General Enrollment Period: Jan. 1 – March 31, for people who missed their Initial Enrollment Period.
Where to get help — free
You don't have to figure this out alone, and you shouldn't rely on a stranger selling one plan. Free, unbiased help is available:
- Medicare.gov — official plan comparisons and enrollment.
- 1-800-MEDICARE (1-800-633-4227) — 24/7 phone help.
- Arizona SHIP (State Health Insurance Assistance Program) — free one-on-one counseling for Avondale-area residents.
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 Maricopa County
(MA penetration in Maricopa 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?
How long does the Part B late penalty last?
Does COBRA count as coverage that lets me delay Medicare?
What if I already missed my deadline?
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Avondale
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This page was last updated: September 29, 2026.