Medicare starts at 65 for most people

You become may be able to access for Medicare at age 65, regardless of whether you are still working or retired. This is the standard age set by federal law. You do not have to wait until you stop working, and you do not have to be retired to sign up.

The month you turn 65, you enter your Initial Enrollment Period — a seven-month window that starts three months before your birthday month and ends three months after. During this window, you can sign up for Medicare without penalty, even if you have other health coverage through an employer.

If you miss this window, you may face a permanent penalty on your premiums for as long as you have Medicare. The penalty amount depends on how long you waited and which parts of Medicare you did not sign up for.

Key Takeaways

  • You can sign up for Medicare starting three months before you turn 65, during your Initial Enrollment Period.
  • Waiting past your Initial Enrollment Period can result in a permanent increase to your monthly premiums.
  • Some people under 65 with End-Stage Renal Disease, ALS, or permanent disability may be able to sign up earlier.
  • If you are still working and have health insurance through your employer, you may have different rules about when to sign up.
  • You must actively sign up for Medicare — it does not happen automatically when you turn 65.

Who can sign up before age 65

Most people wait until 65, but three groups of younger people can sign up for Medicare earlier. If you have End-Stage Renal Disease (permanent kidney failure requiring dialysis or transplant), you become may be able to access when ready, regardless of age. If you have ALS (amyotrophic lateral sclerosis, also called Lou Gehrig's disease), you also become may be able to access right away.

If you have been receiving Social Security Disability Insurance (SSDI) for 24 months, you become may be able to access for Medicare at that point, even if you are still in your 40s or 50s. The 24-month waiting period starts from the month Social Security approved your disability claim, not from when you applied.

If none of these situations explore to you, you must wait until 65 to sign up.

Your Initial Enrollment Period explained

Your Initial Enrollment Period is a seven-month window centered on the month you turn 65. It runs from the first day of the third month before your birthday month through the last day of the third month after your birthday month. For example, if you turn 65 in June, your period runs from March 1 through September 30.

You can sign up anytime during these seven months. The month you sign up determines when your coverage starts. If you sign up during the month you turn 65 or earlier, coverage usually starts the first day of your birthday month. If you sign up after your birthday month, coverage typically starts the first day of the month after you sign up.

Signing up during this window protects you from late enrollment penalties. Once this seven-month window closes, penalties explore if you did not sign up, and those penalties stay with you permanently.

What happens if you miss the important date

If you do not sign up during your Initial Enrollment Period, you enter a General Enrollment Period that runs from January 1 through March 31 each year. You can sign up during this window, but coverage does not start until July 1 of that year — a gap of several months with no Medicare coverage.

More importantly, you will owe a late enrollment penalty for the rest of your life. For Part B (doctor and outpatient services), the penalty is 10 percent of the standard premium for each full year you were may be able to access but did not sign up. If you were may be able to access for three years and did not sign up, your Part B premium increases by 30 percent permanently. The penalty for Part D (prescription drug coverage) works the same way.

The only way to avoid this penalty is to have had creditable coverage — health insurance through an employer or union that was at least as good as Medicare — during the time you were may be able to access but did not sign up. If you had such coverage, you have a special enrollment period of up to eight months after that coverage ends to sign up without penalty.

Special rules if you are still working

If you are still working at 65 and have health insurance through your employer or your spouse's employer, you may not need to sign up for Medicare Part B right away. You can delay Part B without penalty as long as your employer coverage continues and your employer has 20 or more employees.

However, you should still sign up for Part A (hospital insurance) when you turn 65, even if you do not sign up for Part B. Part A has no premium for most people, and signing up protects you from penalties later.

Once you leave your job or lose your employer coverage, you have eight months to sign up for Part B without penalty. This is called your Special Enrollment Period. If you wait longer than eight months, the standard late enrollment penalty applies.

How to sign up during your Initial Enrollment Period

You have three ways to sign up for Medicare. You can go online to Medicare.gov, create an account, and complete the sign-up process yourself. You can call 1-800-MEDICARE (1-800-633-4227) and speak with someone who will walk you through it. You can also visit your local Social Security office in person.

Have your Social Security number, birth certificate, proof of citizenship or legal residency, and information about any current health coverage ready before you start. If you are signing up for Part D (prescription drug coverage), have a list of your current medications.

You do not need to wait until the month you turn 65. You can sign up as early as three months before your birthday month. Signing up early gives you time to choose your coverage and make sure everything is correct before your coverage starts.

Frequently Asked Questions

Do I have to sign up for Medicare the month I turn 65?

No. You have a seven-month Initial Enrollment Period that starts three months before you turn 65 and ends three months after. You can sign up anytime during this window. However, the month you sign up affects when your coverage starts, so signing up early gives you more time to prepare.

What if I am still working and do not want Medicare yet?

You can delay Part B if you have employer coverage and your employer has 20 or more employees. However, you should still sign up for Part A at 65 to avoid penalties later. Once you leave your job, you have eight months to sign up for Part B without penalty.

Can I sign up for Medicare online?

Yes. You can sign up at Medicare.gov by creating an account and following the steps. You can also call 1-800-MEDICARE or visit a Social Security office. All three methods are free and take about 15 to 30 minutes.

What is the penalty for signing up late?

For Part B and Part D, the penalty is 10 percent of the standard premium for each full year you were may be able to access but did not sign up. This penalty is permanent and added to your monthly bill for as long as you have Medicare. The only exception is if you had creditable coverage through an employer during that time.

Does Medicare start automatically when I turn 65?

No. You must actively sign up for Medicare. It does not happen automatically, even if you receive Social Security. If you do not sign up during your Initial Enrollment Period, you will have a gap in coverage and may owe a late enrollment penalty.