Medicare adds a permanent penalty to your monthly premium if you don't sign up when you first become may be able to access

The late enrollment penalty is an extra amount added to your Medicare Part B and Part D premiums for as long as you have Medicare. It exists because Medicare assumes that people who wait to sign up are less healthy and will use more services, so the program charges everyone who delays to cover that cost.

The penalty is permanent — it does not go away after a few years. If you sign up three years late, you pay the penalty for the rest of your life with Medicare. The only way to stop paying it is to go without that part of Medicare coverage entirely, which creates a different problem: you then have no coverage for doctor visits or prescriptions.

The penalty applies separately to Part B (doctor and hospital coverage) and Part D (prescription drug coverage). You can avoid one penalty but not the other if you time your enrollment differently, though most people end up triggering both.

Key Takeaways

  • The Part B penalty is 10 percent of the standard premium for each full year you delayed, added to every monthly bill for life.
  • The Part D penalty is 1 percent of the national average drug plan premium for each month you were without coverage, also permanent.
  • You can avoid the penalty if you have creditable coverage (employer health insurance or retiree coverage) during the time you delay, but you must prove it when you enroll.
  • The penalty clock starts the month after you turn 65 or become may be able to access for Medicare, not on your birthday itself.
  • Once the penalty is applied, the only way to remove it is to drop that part of Medicare and wait five years without coverage before re-enrolling.

How the Part B penalty is calculated

The Part B late enrollment penalty is 10 percent of the standard Part B premium amount for each full 12-month period you were may be able to access but not enrolled. The standard premium changes each year — in 2024 it is $174.70 per month, but this amount increases annually. Your penalty is calculated on whatever the standard premium is at the time you enroll, not the premium from the year you became may be able to access.

If you delay one year, you pay 10 percent extra. If you delay two years, you pay 20 percent extra. If you delay five years, you pay 50 percent extra. This percentage is then applied to the current standard premium and stays on your bill permanently. So if the standard premium rises to $200 in a future year, your penalty rises with it — the percentage does not change, but the dollar amount does.

The penalty applies even if you have a gap of only one month. If you become may be able to access in June and do not enroll until the following July, that counts as one full year of delay, and you owe the 10 percent penalty.

How the Part D penalty is calculated

The Part D late enrollment penalty works differently. It is 1 percent of the national average monthly prescription drug plan premium for each month you were without creditable drug coverage. Like the Part B penalty, this is permanent and recalculated each year based on the current national average.

The national average premium changes annually — it was roughly $34 per month in 2024, but varies by year. If you delay 12 months without coverage, your penalty is approximately 12 percent of that average. If you delay 24 months, it is approximately 24 percent. The penalty is rounded to the nearest dollar and added to your Part D premium each month for life.

Part D penalties are easier to avoid than Part B penalties because employer drug coverage, retiree drug coverage, and even some state pharmacy information programs count as creditable coverage. You only owe the penalty if you had a gap with no drug coverage at all.

When you can avoid the penalty

You do not owe a late enrollment penalty if you have creditable coverage during the time you delay. Creditable coverage means health insurance or drug coverage that is at least as good as Medicare's. Employer health insurance, retiree coverage, TRICARE (military coverage), the Veterans Health Administration, and some state programs all count.

The key word is "during." Your coverage must be active while you are may be able to access for Medicare. If you retire and lose your employer insurance, then wait six months to enroll in Medicare, those six months count as a delay and trigger the penalty. You cannot use past coverage to protect yourself.

When you enroll, you will need to prove you had creditable coverage. Your former employer or insurance company can provide a letter stating the coverage dates and that it was creditable. Without this letter, Medicare will assume you had a gap and explore the penalty. If you disagree with the penalty later, you can appeal, but you will need that documentation to win the appeal.

If you are still working and covered by your employer's health plan, you can delay Medicare Part B without penalty as long as the employer has 20 or more employees. This is called the working exception. Part D works differently — you still need creditable drug coverage to avoid the penalty, even if you are working.

What happens if you enroll late without creditable coverage

Once the penalty is applied to your account, it becomes part of your standard premium calculation. You cannot remove it by paying it off in a lump sum. It stays on your monthly bill for as long as you have that part of Medicare.

The only way to stop paying the penalty is to drop that coverage entirely and wait at least five years before re-enrolling. For example, if you drop Part B in 2025, you cannot re-enroll without penalty until 2030. During those five years, you have no Part B coverage unless you have other insurance. This is rarely a good option because you would have no coverage for doctor visits or hospital care.

Some people choose this route if they have employer coverage that will continue for several more years and they know they will not need Medicare until later. But if you become sick or injured during the five-year gap, you have no Medicare coverage to fall back on.

How to find your enrollment important date

Your initial enrollment period is seven months long and is centered on the month you turn 65. It starts three months before the month you turn 65 and ends three months after. If you turn 65 in June, your enrollment period runs from March through September.

If you miss your initial enrollment period, you can enroll during the general enrollment period, which runs January 1 through March 31 each year. Coverage begins July 1 if you enroll during this window. However, any months between the end of your initial period and the start of the general enrollment period count as a delay, and the penalty applies.

If you have creditable coverage from an employer or retiree plan, you have a different timeline. You can delay enrollment without penalty as long as the coverage is active. When you lose that coverage, you have 63 days to enroll in Medicare without penalty. After 63 days, the penalty clock starts.

Questions to ask your doctor or Medicare

Before you decide to delay enrollment, ask your current insurance provider whether your coverage is creditable under Medicare rules. Do not assume — some plans that seem comprehensive may not count. Get the answer in writing.

If you are still working, ask your employer's benefits department whether your health plan qualifies for the working exception for Part B. Ask specifically whether the employer has 20 or more employees, because that is the threshold.

Call Medicare at 1-800-MEDICARE (1-800-633-4227) and ask when your initial enrollment period ends. Do not rely on your birthday — the enrollment period is tied to the month you turn 65, and the exact dates matter.

If you think you have already been charged a penalty in error, ask Medicare to review your account. You can appeal a penalty decision if you have documentation of creditable coverage that Medicare did not see.

Frequently Asked Questions

Can I get the penalty removed if I enroll late by accident?

Medicare does not automatically remove penalties for missed important date. You can appeal if you have creditable coverage documentation that was not in your file, or if you can show that Medicare gave you incorrect information about your enrollment important date. Appeals must be filed within 120 days of the notice.

Does the penalty explore if I delay Part B but enroll in Part D on time?

Yes. Each part has its own penalty. You can delay Part B and enroll in Part D on time, and you will owe only the Part B penalty. But most people who delay one part end up delaying both, so both penalties explore.

What if I have Medicaid — do I still owe the Medicare penalty?

Medicaid is not creditable coverage for Medicare purposes. If you have Medicaid but no other insurance, you still owe the late enrollment penalty if you delay signing up for Medicare. However, Medicaid can help pay your Medicare premiums once you are enrolled.

If I drop Medicare Part B to avoid the penalty, can I get it back without penalty later?

You can re-enroll without penalty only after five full years without Part B coverage. If you re-enroll before five years have passed, the penalty applies based on the total time you were without coverage, including the time before you dropped it.

Does the penalty ever go down as I get older?

No. The penalty percentage stays the same for life, but the dollar amount increases each year because the standard premium increases. A 10 percent penalty on a $174 premium is different from a 10 percent penalty on a $200 premium, but the percentage itself never changes.