You can start Medicare at 65, but the exact month depends on your birthday and whether you're still working

Medicare may be able to access begins the first day of the month you turn 65. If your birthday is the first of any month, you become may be able to access that day. If your birthday falls on any other day, you become may be able to access on the first day of the following month. You do not have to wait until your actual birthday to sign up — you can start the process three months before you turn 65.

The key decision is not whether to start, but when. Starting late can cost you money in permanent penalties, and the rules differ depending on whether you're still working and whether you have health coverage through your job. Missing the sign-up window that applies to your situation can lock you into higher premiums for as long as you have Medicare.

Key Takeaways

  • You become may be able to access for Medicare on the first day of the month you turn 65, and you can begin the sign-up process three months before that date.
  • If you do not sign up during your initial enrollment period and you do not have a valid reason for the delay, you will pay a permanent penalty on your Part B and Part D premiums.
  • If you are still working and covered by your employer's health plan, you may be able to delay Part B without penalty, but you must sign up for Part A and report your work status to Medicare.
  • The initial enrollment period lasts seven months: three months before the month you turn 65, the month itself, and three months after.
  • Special enrollment periods exist for people who lose job-based coverage or miss the standard window due to circumstances beyond their control.

The initial enrollment period: your main window to sign up

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

During this window, you can sign up for Medicare Part A (hospital insurance) and Part B (medical insurance) without penalty, regardless of when you actually start coverage. You can also sign up for Part D (prescription drug coverage) or a Medicare Advantage plan. If you miss this window and you do not have a valid reason, Medicare will charge you a permanent penalty on Part B and Part D premiums for as long as you have Medicare.

The penalty for Part B is 10 percent of the standard premium for each full year you delayed. The penalty for Part D is 1 percent of the national average premium for each month you went without coverage. These penalties do not go away if you sign up later — they are permanent.

If you're still working: the rules change

If you are covered by your employer's health plan when you turn 65, you may be able to delay Part B without penalty. This is called creditable coverage. The rule is: if your employer has 20 or more employees and you or your spouse are still working there, you can delay Part B. You must, however, sign up for Part A during your initial enrollment period, even if you do not use it yet.

You also must tell Medicare that you have job-based coverage. You do this by contacting Social Security or Medicare directly and reporting your employment status. If you do not report it, Medicare may assume you should have signed up for Part B and charge you a penalty later.

When you leave your job or lose the employer coverage, you have eight months to sign up for Part B without penalty. This is called a special enrollment period. The eight-month clock starts the month after your coverage ends or the month you stop working, whichever is later. If you miss this window, the permanent penalty applies.

Special enrollment periods: when you get a second chance

A special enrollment period gives you extra time to sign up for Medicare without penalty if you miss your initial enrollment period for certain reasons. The most common reason is losing job-based health coverage. Others include moving out of your plan's service area, losing coverage because your employer went out of business, or being incorrectly told by Social Security or Medicare that you did not need to sign up.

Each special enrollment period has its own length and rules. The job-based coverage period is eight months. If you move or lose coverage for other reasons, you typically have two months. You must sign up during the period that applies to you — there is no extension beyond that.

To use a special enrollment period, you will need to show proof of the event that triggered it: a letter from your employer saying coverage ended, a notice from your plan, or documentation of your move. Have this ready before you contact Medicare or Social Security.

What happens if you miss your enrollment period

If you do not sign up during your initial enrollment period and you do not may have access to for a special enrollment period, you will face a permanent penalty when you finally do sign up. For Part B, the penalty is 10 percent of the standard premium for each full year you delayed. For Part D, it is 1 percent of the national average premium for each month you went without coverage.

These penalties are calculated from the month your initial enrollment period ended. If your initial enrollment period ended in September and you sign up in January of the following year, you owe four months of Part D penalty (October, November, December, January). The penalty stays on your premium for as long as you have Medicare — it does not expire.

The only way to avoid the penalty is to show that you had a valid reason for missing the important date. Valid reasons are limited and specific: you were out of the country for more than six months, you received incorrect information from Social Security or Medicare, or you had a life-changing event that prevented you from signing up. straightforward forgetting or not knowing about the important date is not a valid reason.

How to sign up during your enrollment period

You can sign up for Medicare through three channels: online at Medicare.gov, by phone at 1-800-MEDICARE (1-800-633-4227), or in person at your local Social Security office. Online is usually fastest — you can complete the process in 10 to 15 minutes if you have your Social Security number and information about any current health coverage.

By phone, expect to wait 30 minutes to an hour during peak times (mornings and early in the week). The call is free. You will need your Social Security number, date of birth, and information about your current coverage. If you have questions about which plan to choose, the phone representative can walk you through the options, though they cannot recommend a specific plan.

In person, you will need to bring your Social Security card, proof of citizenship or legal residency, and proof of age. Bring any documents related to current health coverage as well. Social Security offices are usually less crowded in the afternoon and on Thursdays and Fridays.

Deciding between Part A, Part B, and Part D at sign-up

When you sign up, you will choose which parts of Medicare to enroll in. Part A (hospital insurance) is usually free if you or your spouse paid Medicare taxes while working. Most people sign up for Part A and Part B together. Part B (medical insurance) costs a monthly premium that varies based on your income.

Part D (prescription drug coverage) is optional, but signing up during your initial enrollment period matters. If you do not sign up when you are first may be able to access and you do not have other drug coverage, you will pay a penalty when you do sign up. The penalty is 1 percent of the national average premium for each month you delayed, and it is permanent.

You can also choose a Medicare Advantage plan (Part C) instead of Original Medicare (Parts A and B). Medicare Advantage plans include drug coverage and usually have lower out-of-pocket costs, but they limit which doctors and hospitals you can use. If you choose Medicare Advantage, you do not need to sign up for Part D separately — it is included.

Frequently Asked Questions

What if I turn 65 in the middle of the month?

Your Medicare coverage starts on the first day of the month you turn 65, not on your actual birthday. If you turn 65 on June 15, your coverage begins June 1. If you turn 65 on June 1, your coverage also begins June 1. You can sign up starting three months before the month you turn 65.

Can I delay Medicare if I'm still working?

You can delay Part B if your employer has 20 or more employees and you or your spouse are still working there. You must still sign up for Part A during your initial enrollment period and report your employment status to Medicare. When you leave your job, you have eight months to sign up for Part B without penalty.

What is the penalty for signing up late?

For Part B, the penalty is 10 percent of the standard premium for each full year you delayed. For Part D, it is 1 percent of the national average premium for each month you went without coverage. Both penalties are permanent and stay on your premium for as long as you have Medicare.

Can I sign up after my initial enrollment period ends?

Yes, but you will likely pay a permanent penalty unless you may have access to for a special enrollment period. Special enrollment periods exist for people who lose job-based coverage, move out of their plan's service area, or receive incorrect information from Medicare or Social Security. You must sign up during the special period that applies to your situation.

Do I have to choose a plan during sign-up, or can I decide later?

You choose your plan during sign-up. If you do not choose, Medicare will enroll you in Original Medicare (Part A and Part B) automatically. You can change your plan during the annual enrollment period (October 15 through December 7) or if you may have access to for a special enrollment period, but it is easier to choose the right plan from the start.