Medicare 2026
How Medicare late fees work for South Portland residents
SOUTH PORTLAND, Maine — Some Medicare mistakes are easy to fix. Missing your sign-up window for Part B or Part D usually isn't one of them. The late-enrollment penalties for those two parts can follow you every month for the rest of your life, quietly raising your premium long after the paperwork is forgotten.
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Key takeaways
- The Part B late-enrollment penalty adds 10% to your 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-enrollment penalty is 1% of the national base beneficiary premium for every month you went without creditable drug coverage, added to your Part D premium as long as you have one.
- If you have job-based coverage from a current employer, you may qualify for a Special Enrollment Period to sign up for Part B later without a penalty.
- Medicare's Annual Enrollment Period runs Oct. 15 – Dec. 7, but the initial deadlines that trigger lifetime penalties are tied to your 65th birthday and your Initial Enrollment Period.
The good news: these penalties are avoidable if you know the deadlines and understand how "creditable coverage" works. Here's a plain-language guide for readers in South Portland and across Cumberland County.
How the Part B penalty works
Most people become eligible for Medicare during a seven-month Initial Enrollment Period (IEP) — the three months before the month you turn 65, your birthday month, and the three months after.
If you don't sign up for Part B during that window, and you don't qualify for a Special Enrollment Period, the penalty is 10% added to your Part B premium for each full 12-month period you went without it. That higher premium generally sticks with you for as long as you have Part B.
Example: if you waited three full years to enroll, you'd pay 30% more every month — potentially for decades.
How the Part D penalty works
Part D covers prescription drugs, and it has its own separate penalty. If you go 63 days or more in a row without Part D or other "creditable" drug coverage after your Initial Enrollment Period ends, you can owe a late fee when you finally sign up.
The math: Medicare multiplies 1% of the national base beneficiary premium by the number of full months you were uncovered, rounds to the nearest 10 cents, and adds that amount to your Part D premium. Like the Part B penalty, it usually lasts as long as you have Part D coverage.
What "creditable coverage" means
You don't have to enroll in Part D the moment you turn 65 if you already have drug coverage that's at least as good as Medicare's standard — that's called creditable coverage. Common examples include some employer plans, union plans, and VA benefits.
Your plan is required to send you a notice each year telling you whether it counts as creditable. Save those notices. When you eventually join a Medicare drug plan, they're your proof that you shouldn't be charged a penalty.
For context, the 2026 Part D program has a $2,100 out-of-pocket cap, a maximum deductible of $615, and the old "donut hole" coverage gap is gone — replaced by three simpler phases. There's also an optional Medicare Prescription Payment Plan that lets you spread drug costs over the year in monthly installments.
When you can delay without a penalty
You can delay Part B (and often Part D) without a penalty if you have qualifying coverage from a current employer — yours or a spouse's — at a company with 20 or more employees. When that job-based coverage ends, you get an eight-month Special Enrollment Period to sign up for Part B.
A few important cautions:
- COBRA and retiree coverage don't count as active employer coverage for Part B purposes. Signing up for Medicare late because you had COBRA is one of the most common — and most expensive — mistakes.
- Small-employer coverage (fewer than 20 employees) usually requires you to take Medicare on time.
- If you contribute to a Health Savings Account, enrolling in any part of Medicare stops your HSA contributions.
If you're not sure which category you fall into, ask before your birthday, not after.
Local help in South Portland
South Portland is in Cumberland County, where Medicare beneficiaries can choose Original Medicare with or without a standalone Part D plan, or a Medicare Advantage plan that may include drug coverage. Plan availability is set at the county level, and the number of plans and carriers in Cumberland County changes each year.
Maine's State Health Insurance Assistance Program (SHIP), run through the Office of Aging and Disability Services, offers free one-on-one counseling. A SHIP counselor can look at your specific situation — your job coverage, your prescriptions, your income — and tell you whether delaying enrollment is safe.
You can also call 1-800-MEDICARE (1-800-633-4227) or visit medicare.gov for the official rules on enrollment periods and penalties.
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 Cumberland County
(MA penetration in Cumberland 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
When is my Initial Enrollment Period for Medicare?
Does the Part B penalty ever go away?
Do I need Part D if I don't take any prescriptions right now?
Where can I get personalized help in South Portland?
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for South Portland
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This page was last updated: September 2026.