Medicare 2026

How Tampa Retirees Can Avoid Medicare Part B and D Penalties

TAMPA, Fla. — For most people turning 65, Medicare feels like one big decision. It isn't. It's a series of small deadlines, and missing the wrong one can follow you for the rest of your life.

That's because two parts of Medicare — Part B (doctor visits and outpatient care) and Part D (prescription drugs) — carry late-enrollment penalties that don't go away. They're added to your monthly premium for as long as you have coverage. In Tampa, which sits in Hillsborough County, local counselors say missed deadlines are one of the most common — and most preventable — mistakes they see.

Here's how the timing works, and how to stay ahead of it.

The one window everyone gets: your Initial Enrollment Period

Your Initial Enrollment Period (IEP) is seven months long. It starts three months before the month you turn 65, includes your birthday month, and ends three months after.

Sign up for Part B and Part D during this window and you will not owe a late penalty. This is the cleanest, simplest path — and the one Medicare counselors wish more people used.

One catch: if you enroll in the three months after your birthday month, your Part B coverage now starts the month after you sign up, thanks to a rule change that took effect in 2023. That's better than it used to be, but it's still a reason to enroll early in your window rather than late.

What happens if you miss it: the General Enrollment Period

If you don't sign up for Part B during your IEP and you don't qualify for a Special Enrollment Period (more on that below), you have to wait for the General Enrollment Period. That runs January 1 through March 31 each year, with coverage starting the month after you enroll.

The problem isn't just the wait. It's the penalty:

• Part B late penalty: 10% added to your monthly Part B premium for each full 12-month period you could have had Part B but didn't. In most cases, you pay it for as long as you have Part B — meaning the rest of your life.

So a two-year delay generally means a 20% higher Part B premium, permanently.

The Part D penalty works differently — and it also lasts

Part D has its own clock. If you go 63 days or more without "creditable" drug coverage after you're first eligible, a Part D late enrollment penalty starts building.

Here's the math: 1% of the "national base beneficiary premium" for every full month you went uncovered, rounded to the nearest 10 cents, and added to your Part D premium. Because the base premium can change each year, so can your penalty amount. And like the Part B penalty, it generally stays with you for life.

"Creditable" is the key word. If you had drug coverage through an employer, union, or the VA that Medicare considers at least as good as Part D, those months don't count against you. Your plan is required to send you a notice each year telling you whether your coverage is creditable — keep those letters.

The Special Enrollment Period that protects working Tampans

Plenty of people in Hillsborough County keep working past 65 and stay on an employer health plan. If that's you, you generally don't have to take Part B at 65 — but you do have to act when the job coverage ends.

The Special Enrollment Period (SEP) for people leaving employer coverage gives you eight months to sign up for Part B without a penalty. It starts the month after your employment or your group coverage ends, whichever comes first.

A few things trip people up:

• COBRA and retiree coverage do not count as active employer coverage for this rule. Your SEP clock starts when you leave the job, not when COBRA ends.
• Marketplace (ACA) plans do not count either. If you drop employer coverage for a Marketplace plan at 65, you can still owe a Part B penalty later.
• For Part D, you generally have 63 days after losing creditable drug coverage to join a Part D plan without a penalty.

If you're unsure whether your workplace plan is "creditable" or whether your situation triggers an SEP, ask your benefits office in writing — and keep the answer.

How the enrollment windows fit together

Once you're in Medicare, two more dates matter every year:

• Annual Enrollment Period: Oct. 15 – Dec. 7. This is when anyone with Medicare can join, switch, or drop a Part D or Medicare Advantage plan for the coming year.
• Medicare Advantage Open Enrollment: Jan. 1 – March 31. If you're already in a Medicare Advantage plan, you get one chance during this window to switch to a different Advantage plan or return to Original Medicare.

These windows are for changing plans — not for escaping a late-enrollment penalty you already owe. That's why the earlier deadlines matter so much.

A quick note on Part D costs for 2026 and 2027

Even for people who enroll on time, a few 2026 Part D numbers are worth knowing: the annual out-of-pocket cap on covered drugs is $2,100, the maximum Part D deductible a plan can charge is $615, and the old "donut hole" is gone — Part D now has three phases. There's also the Medicare Prescription Payment Plan, an optional program that lets you spread drug costs across the year in monthly payments instead of paying at the pharmacy counter.

Higher-income enrollees may owe IRMAA, an income-related surcharge on Part B and Part D premiums, which for 2026 starts above $109,000 in income for a single filer, based on your tax return from two years earlier.