Your 65th birthday starts a clock. For turning 65 Medicare enrollment, you get one 7-month window, and the months you pick inside it decide when your coverage starts. Miss it without the right kind of other coverage, and the Part B late enrollment penalty can follow you for as long as you have Part B. This countdown shows what to do 3 months out, in your birthday month, and after, plus the mistakes we see most often from Miami and West Palm Beach to Tampa Bay, Orlando, Jacksonville, and Ft. Myers-Naples.
This article is educational. Instant Health Help is a licensed Florida health insurance agency. We are not Medicare, Social Security, or an insurance company. Confirm your own dates on Medicare.gov or with Social Security. Want the full step-by-step sign-up walkthrough? Read our guide to turning 65 Medicare enrollment, step by step.
The short answer
- Your Initial Enrollment Period is 7 months. It starts 3 months before the month you turn 65 and ends 3 months after it.
- Earlier is smoother. If you sign up for Part B before your birthday month, coverage starts the month you turn 65. Sign up in your birthday month or later, and it starts the month after you sign up.
- Already getting Social Security? You are usually enrolled in Parts A and B automatically and get your card in the mail. Everyone else has to sign up.
- The penalty is about the kind of coverage you have, not your age. Coverage from a current job (yours or your spouse’s) can let you wait. Marketplace, COBRA, and retiree coverage generally cannot.
- Missed it? The fix is usually the General Enrollment Period, January 1 to March 31, and the penalty may already apply.
Turning 65 Medicare enrollment countdown
3 months before your birthday month
- Decide whether you will take Part B now or delay it because you (or your spouse) are still working with job-based coverage. Our guide on delaying Part B while you are still working covers that choice.
- If you have a Marketplace plan, plan the switch now. See can you keep a Marketplace plan after 65.
- List your doctors, prescriptions, and pharmacies. You will need them to compare plans.
- Signing up in these 3 months is what gets Part B to start in your birthday month.
Your birthday month
- Part A usually starts this month if you qualify for premium-free Part A. (If your birthday is on the 1st, Part A starts the month before.)
- If you sign up for Part B now, it starts next month. That one-month gap is the most common surprise we see.
- If you have a Health Savings Account, talk to your tax advisor. Part A can start up to 6 months back when you sign up later, which affects HSA contributions.
1 to 3 months after your birthday month
- You can still sign up, and coverage starts the month after you sign up.
- This is the last stretch of your Initial Enrollment Period. After it ends, you may have to wait for another enrollment period.
The window most people miss
The Initial Enrollment Period is not the same as Medicare Annual Enrollment (October 15 to December 7). Annual Enrollment is for people who already have Medicare and want to change plans. If you turn 65 in the fall, your own 7-month window still runs on your birthday, not on the fall calendar. Plenty of people hear “open enrollment” on TV, think they can wait until December, and end up outside their own window.
Medicare Part B late enrollment penalty
If you do not sign up for Part B when you are first eligible, and you do not qualify for a Special Enrollment Period, Medicare adds a late enrollment penalty to your Part B premium.
- 10% for each full 12-month period you could have had Part B but did not sign up.
- It is added every month and usually lasts for as long as you have Part B. It is not a one-time fee.
- It is figured on the standard Part B premium, so the dollar amount changes when the premium changes. Check Medicare.gov for this year’s amount.
Example in percentages: if you waited 2 full years without a Special Enrollment Period, your penalty would be 20% on top of the standard premium.
Two other penalties to know about:
- Part D: if you go 63 days or more without creditable drug coverage after you are first eligible, a penalty of 1% per month without coverage is added to your drug premium for as long as you have Medicare drug coverage.
- Part A: most people get Part A premium-free. If you have to buy it and sign up late, your premium may go up 10% for twice the number of years you waited.
Mistakes that trigger the penalty
- Thinking a Marketplace plan counts. Having or losing Marketplace coverage does not give you a Special Enrollment Period for Part B.
- Counting on COBRA or retiree coverage. Neither one counts as coverage from a current job, and COBRA does not extend your Special Enrollment Period.
- Missing the 8-month window after job coverage ends. If you delayed Part B because of a current job, you have 8 months after the job or the coverage ends (whichever comes first) to sign up without a penalty.
- Waiting for the fall. As noted above, Annual Enrollment is not your sign-up window.
- Assuming you were enrolled automatically. Automatic enrollment usually applies only if you already get Social Security or Railroad Retirement benefits.
Missed your window? What to do now
- General Enrollment Period: sign up between January 1 and March 31. Coverage starts the month after you sign up, and a late penalty may apply.
- Check for a Special Enrollment Period. Medicare lists several, including losing Medicaid, a declared disaster or emergency, and getting wrong information from your employer or health plan. These usually use form CMS-10797 sent to Social Security.
- Low income? People who enroll in a Medicare Savings Program generally do not pay the Part B late penalty. See our page on Medicare Savings Programs in Florida.
- Think the penalty is wrong? You can ask Social Security for a reconsideration.
Frequently asked questions
When should I sign up for Medicare if I am turning 65?
If you want Part B to start the month you turn 65, sign up during the 3 months before your birthday month. You can still sign up in your birthday month or the 3 months after, but coverage starts later.
Does my Marketplace plan let me delay Part B without a penalty?
No. Marketplace coverage does not give you a Special Enrollment Period for Part B. Plan to move to Medicare when you are first eligible.
How much is the Part B late enrollment penalty?
It is 10% of the standard Part B premium for each full 12 months you went without Part B when you could have had it, and it is usually charged for as long as you have Part B.
Is turning 65 during Annual Enrollment the same as Annual Enrollment?
No. Your Initial Enrollment Period is based on your birthday. Annual Enrollment is for people who already have Medicare.
How Instant Health Help can help
We help Floridians turning 65 map their own 7-month window, figure out whether a job-based plan lets them wait on Part B, and compare Medicare Advantage, Medigap, and Part D options that fit their doctors and prescriptions. Help in English or Spanish (lea nuestra guía en español).
Anywhere in Florida, our licensed Medicare agent in Florida can review your turning-65 countdown by phone. In Central Florida, you can also meet our Medicare agent in Orlando or Medicare agent in Kissimmee in person.
Turning 65 in the next few months?
Tell us your birthday month and what coverage you have now, and we will lay out your countdown with you.
Call (321) 315-0054 | agent@inshh.com
Serving Florida statewide: Miami, West Palm Beach, Tampa Bay, Orlando, Jacksonville, Ft. Myers-Naples, and communities across the state.
We do not offer every plan available in your area. Currently we represent 10 organizations which offer 489 products in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.