When To Enroll in Medicare
Most people should sign up for Medicare during the seven-month window around their 65th birthday, which runs from three months before the birthday month through three months after. If you or a spouse still work and carry active employer group coverage, you can delay Part B without penalty and use a Special Enrollment Period later. The timing turns on three things: whether you have creditable coverage from current employment, whether you want Part B right away, and whether you also need a drug plan. Miss the window without qualifying coverage and the higher premiums can follow you for the rest of your life.
This primer walks Florida residents through the enrollment dates that matter for Medicare Parts A, B, C, D, and Medigap. Because the two programs are easy to mix up, it also helps to know the difference between Medicare and Medicaid before you map out your dates. For direct questions, you can call Medicare at 1-800-633-4227 (1-800-MEDICARE).
Initial Medicare Enrollment Period
The time to start thinking about Medicare is the months surrounding your 65th birthday. This first window matters enormously, because missing it can raise your health insurance costs permanently. Your Initial Enrollment Period covers the three months before your birthday month, the birthday month itself, and the three months after: seven calendar months in all.
For example, someone born on August 2, 1961 turns 65 on August 2, 2026. That person's Initial Enrollment Period runs from May 1 through November 30, 2026.
You must be enrolled in Medicare Part A and Part B before you can add Medicare Advantage, Part D, or Medigap. If the alphabet of Medicare parts and basics still feels new, it is worth sorting out what each part covers before your window opens. If you need prescription drug coverage, and most people eventually do, sign up for Part C (Medicare Advantage with a drug plan) or a standalone Part D plan during this same seven-month window. Wait too long and you may pay a permanent Part D surcharge.
A practical tip if your 65th birthday is approaching and you are enrolling for the first time: get Part A and Part B, then add either Medicare Advantage with drug coverage or a standalone Part D plan. It is safer to pay a little more now and scale back later than to carry a lifelong late-enrollment penalty.
How to Sign Up for Original Medicare
To enroll in Part A and Part B, apply online through the Social Security Administration, visit a local Social Security office, or call 1-800-772-1213. If you already receive Social Security benefits before 65, you are usually enrolled in Part A and Part B automatically.
Costs of Late Medicare Enrollment
If you skip Part B when first eligible and do not have coverage Medicare recognizes, you will likely face higher premiums for life. Under federal law, your Part B premium rises 10 percent for each full 12-month period you could have had Part B but did not enroll (42 U.S.C. Section 1395r(b)). That surcharge stays on your bill for as long as you keep Part B. As of January 2026, the standard Part B premium is $202.90 per month, so a two-year delay pushes the monthly premium to roughly $243.50 once the penalty is applied.
The Part B penalty does not apply if you are age 65 or older and covered by a group health plan through your own or your spouse's current employment. It does apply to retiree health plans and COBRA, because Medicare does not treat those as coverage from current employment.
Part A carries its own late fee. Most people get premium-free Part A because they worked at least 40 quarters in Medicare-covered employment. Those who must buy it face a 10 percent higher Part A premium, owed for twice the number of years they delayed. As of January 2026, the full Part A premium is $565 per month ($311 for those with 30 to 39 quarters of coverage).
Later Medicare Enrollment Periods
If you already enrolled, or if you missed your Initial Enrollment Period, these are the windows that follow.
Part A and Part B | Original Medicare Windows
Each year, the General Enrollment Period runs January 1 through March 31. Coverage now generally begins the first day of the month after you sign up, a change from the older rule that delayed coverage to July 1.
Once you are 65 and enrolled in Part B, you have a six-month Medigap Open Enrollment window to buy a Medicare Supplement policy with guaranteed-issue rights.
The Annual Election Period runs October 15 through December 7. During this window you can switch to Medicare Advantage or change your prescription drug plan.
Part C | Medicare Advantage Dates
Your Initial Election Period is the same seven months surrounding your 65th birthday. During the Annual Election Period, October 15 through December 7, you can move to Original Medicare or switch to a different Medicare Advantage plan. There is also a Medicare Advantage Open Enrollment Period from January 1 through March 31, when you can leave a Medicare Advantage plan for Original Medicare or change to another Advantage plan.
Special Enrollment Period
Once your Initial Enrollment Period ends, you may still qualify to sign up during a Special Enrollment Period. If you are covered by a group health plan based on current employment, you can add Part A or Part B any time while you or your spouse keeps working and stays covered. If your income is limited, it is also worth checking whether you qualify for both programs at once, since dual eligibility for Medicare and Medicaid can cover costs that Medicare alone leaves on the table.
If you or your spouse is working and covered by an employer or union group health plan, and you are turning 65, ask the benefits administrator whether they require you to take Medicare. If not, you can enroll during the eight-month Special Enrollment Period that starts the month after the employment or the group coverage ends, whichever comes first (42 U.S.C. Section 1395p(i)). Signing up in this window keeps you clear of the Part B penalty.
More on Medicare Open Enrollment
Medicare's Annual Open Enrollment runs October 15 through December 7. Do not let it pass without checking whether your current plan still fits.
During this period you can join a Part D drug plan or change the one you have. You can also return to Original Medicare (Parts A and B) from a Medicare Advantage plan, join a Medicare Advantage plan, or switch Advantage plans. Go to www.medicare.gov or call 1-800-MEDICARE (1-800-633-4227) to make changes.
Reviewing your plan each year pays off. Are your doctors still in your Medicare Advantage plan's network? Did any of your prescriptions drop off the plan's formulary? Could you get the same coverage for less by switching? Read your plan's Annual Notice of Change letter carefully, since drug plans can adjust premiums, deductibles, and covered-drug lists every year, and Medicare Advantage plans can change benefits and networks.
Current Medicare Costs to Know (2026)
A few numbers help you weigh whether to enroll now or delay. As of January 2026:
● Part B standard premium: $202.90 per month, up from $185.00 in 2025. This is the figure the 10-percent-per-year penalty is calculated against, which is why a delay gets expensive fast.
● Part B annual deductible: $283, up from $257 in 2025. You pay this before Part B starts covering its usual 80 percent share.
● Part A inpatient hospital deductible: $1,736 per benefit period in 2026, up from $1,676 in 2025. This is what a hospital stay can cost before Part A coverage kicks in, and it resets with each new benefit period.
Higher-income beneficiaries pay an income-related surcharge (IRMAA) on top of the standard Part B premium, which for 2026 begins at modified adjusted gross income above $109,000 for individuals and $218,000 for couples filing jointly. IRMAA affects roughly 8 percent of people with Medicare. At the other end, these premiums and deductibles are exactly the costs that Florida Medicaid planning can help cover once someone needs long-term care, which is why enrollment timing and Medicaid strategy tend to be discussed together.
Key Takeaways
- Your Initial Enrollment Period is the seven months around your 65th birthday. Signing up then avoids penalties.
- Delaying Part B without qualifying employer coverage adds 10 percent to your premium for each 12 months you waited, for life.
- Active employer coverage from current work lets you delay Part B and use an eight-month Special Enrollment Period. COBRA and retiree plans do not count.
- The 2026 standard Part B premium is $202.90 per month with a $283 deductible; the Part A hospital deductible is $1,736 per benefit period.
- The Annual Election Period, October 15 to December 7, is your yearly chance to change drug and Advantage plans.
Frequently Asked Questions
Q. When exactly do I enroll in Medicare for the first time?
A. During your Initial Enrollment Period: the three months before your 65th birthday month, the birthday month, and the three months after. If you already receive Social Security, Part A and Part B usually start automatically at 65.
Q. What is the penalty if I sign up for Part B late?
A. Federal law raises your Part B premium 10 percent for every full 12-month period you could have enrolled but did not (42 U.S.C. Section 1395r(b)). The surcharge is added to the standard premium, which is $202.90 per month as of January 2026, and it lasts as long as you keep Part B.
Q. Can I wait to take Part B if I am still working?
A. Yes. If you have group health coverage based on your own or your spouse's current employment, you can delay Part B and enroll later during an eight-month Special Enrollment Period that begins the month after that job or coverage ends (42 U.S.C. Section 1395p(i)). No penalty applies.
Q. Does COBRA or a retiree plan let me delay Part B?
A. No. Medicare does not treat COBRA or retiree coverage as coverage from current employment, so relying on either can trigger the late-enrollment penalty. Sign up for Part B during your Initial Enrollment Period instead.
Q. When can I change my Medicare Advantage or drug plan?
A. During the Annual Election Period, October 15 through December 7. There is also a Medicare Advantage Open Enrollment Period, January 1 through March 31, for switching Advantage plans or returning to Original Medicare.
Q. How much does Medicare cost in 2026?
A. The standard Part B premium is $202.90 per month with a $283 annual deductible. Most people pay no Part A premium; those who must pay it owe up to $565 per month, and the Part A hospital deductible is $1,736 per benefit period.
Get Your Medicare Timing Right
Choosing the right moment to sign up can protect you from premiums that follow you for life, and the safest move is to map your dates before your 65th birthday arrives. Start by confirming your Initial Enrollment Period, then decide whether your current employer coverage lets you delay Part B or whether you should enroll right away. If you are leaving a job, mark the eight-month Special Enrollment Period on your calendar so the window does not close on you. Have your Medicare card or your Social Security number ready when you call, since you will need it to confirm eligibility and start dates. The payoff is straightforward: enroll on time and you keep your costs at the standard rate instead of paying a lifelong penalty. If you want a second set of eyes on how Medicare fits with long-term care in Florida, the Elder Needs Law team can walk through your situation when you schedule a consultation with a Florida elder law attorney who can review your timing and options.
Official Medicare Resources
● When and How to Sign Up for Medicare Part A and Part B
