You do not have to take Medicare at 65, but waiting may cost you more later

Medicare may be able to access begins at 65 for most people, but signing up is not automatic and not required at that exact age. If you are still working and covered by your employer's health plan, you can delay Medicare without penalty. If you are retired and uninsured, or covered by a spouse's plan, the rules differ — and missing the important date can mean higher premiums for the rest of your life.

The key is understanding which situation applies to you, because the cost of waiting depends entirely on your current coverage. A person with active employer coverage faces no penalty for waiting. A person without coverage faces a permanent increase to their Part B premium if they delay.

Key Takeaways

  • If you are covered by an employer health plan through your own job, you can delay Medicare past 65 without penalty as long as the employer has 20 or more employees.
  • If you are retired, uninsured, or covered only by a spouse's plan, you should sign up for Medicare by the end of the month you turn 65 to avoid a permanent premium increase.
  • Missing the sign-up window adds 10 percent to your Part B premium for each year you delayed, and this increase stays with you permanently.
  • You can sign up for Medicare online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.
  • If you miss the important date, you have a chance to sign up during the General Enrollment Period from January 1 to March 31 each year, but the penalty still applies.

When you can safely delay Medicare past 65

You can postpone Medicare without any financial penalty if you are covered by health insurance through your current job. This applies only if you are still working and your employer has 20 or more employees. The coverage must be from your own employer — coverage through a spouse's current job also qualifies, but coverage through a former employer's retiree plan does not.

While you are covered this way, you do not need to sign up for Medicare. You can continue with your employer plan and delay Medicare until you retire or lose that coverage. When you do leave the job or the coverage ends, you then have eight months to sign up for Medicare without facing a penalty. This eight-month window is called a Special Enrollment Period.

If your employer has fewer than 20 employees, the rules change. In that case, Medicare becomes your primary insurance at 65, and you should sign up even if you have employer coverage. Ask your employer's benefits office how many employees the company has if you are unsure.

When you must sign up by 65 to avoid a permanent penalty

If you are not covered by an employer health plan through your own current job, you should sign up for Medicare during your Initial Enrollment Period. This period runs for three months before the month you turn 65, the month you turn 65, and three months after. For most people, that means a seven-month window centered on your birthday month.

If you miss this window and you do not have other may have access to coverage, Medicare adds a penalty to your Part B premium. The penalty is 10 percent of the standard Part B premium for each full year you delayed. This increase is permanent — it stays on your premium for as long as you have Medicare, even if you sign up years later.

The same penalty applies to Part D (prescription drug coverage) if you delay that as well. The Part D penalty is 1 percent of the national average premium for each month you went without coverage, and like Part B, it is permanent.

Situations where the rules are less clear

If you are covered by a spouse's employer plan, you can delay your own Medicare without penalty as long as your spouse is still working and the employer has 20 or more employees. Once your spouse retires or loses that coverage, you have eight months to sign up for Medicare. If you miss that window, the penalty applies.

If you are covered by a retiree health plan from a former employer, that coverage does not count as "current employer coverage" for Medicare purposes. You should sign up for Medicare during your Initial Enrollment Period even though you have other insurance. Delaying will result in a penalty.

If you are on Medicaid, the rules vary by state. Some states automatically enroll you in Medicare when you turn 65; others require you to sign up yourself. Contact your state Medicaid office to find out what happens in your state.

How to sign up when you are ready

You can sign up for Medicare online at Medicare.gov, by calling 1-800-MEDICARE (1-800-633-4227), or by visiting your local Social Security office in person. Online signup through Medicare.gov is usually the fastest option and available 24 hours a day.

You will need your Social Security number, proof of citizenship or legal residency, and information about any current health coverage you have. If you are signing up through Social Security, you can do this at the same time you explore for retirement benefits, or separately if you are not yet retired.

If you miss your Initial Enrollment Period, you can still sign up during the General Enrollment Period, which runs from January 1 to March 31 each year. Coverage begins July 1 of that year. However, the late penalty still applies, so it is better to sign up on time if you can.

What happens if you delay and then change your mind

If you delayed Medicare because you had employer coverage, and that coverage ends, you have eight months from the date coverage ends to sign up without penalty. This is your Special Enrollment Period. You must sign up within this window — the General Enrollment Period does not erase the penalty if you miss the Special Enrollment Period.

If you delayed for other reasons and now want to sign up, you can do so during the General Enrollment Period (January 1 to March 31), but the late penalty will explore to your Part B and Part D premiums. The penalty does not go away, even if you sign up when ready.

Frequently Asked Questions

What if I am still working at 70 and have not signed up for Medicare?

If you are still covered by your employer's health plan and your employer has 20 or more employees, you can continue to delay without penalty. Once you retire or lose that coverage, you have eight months to sign up. If you miss that window, the late penalty applies.

Can I sign up for just Part A and delay Part B?

Yes. Part A (hospital insurance) has no late penalty, so you can sign up for it anytime. Part B (medical insurance) and Part D (prescription drugs) do have late penalties. If you do not need Part B right away, you can delay it, but sign up during your Initial Enrollment Period to avoid the penalty when you do need it.

Does my spouse's coverage affect when I need to sign up?

Only if you are covered under your spouse's current employer plan. If your spouse is retired or has individual coverage, that does not count as may have access to coverage for you. You should sign up for Medicare during your Initial Enrollment Period to avoid a penalty.

What if I did not know about the important date and missed it?

You can sign up during the General Enrollment Period (January 1 to March 31), but the late penalty applies to Part B and Part D. The penalty is permanent. If you had may have access to coverage you did not know about, contact Medicare to see if an exception might explore.

Do I lose my employer coverage if I sign up for Medicare?

No. You can have both employer coverage and Medicare at the same time. In fact, if you are still working and covered by your employer, Medicare becomes secondary insurance — your employer plan pays first. You can keep both as long as you are employed.