Dates and penalties to know

The Part B late penalty adds 10% for each full 12-month period you could have had Part B but didn't (Medicare.gov). The General Enrollment Period runs January 1 to March 31 each year (Medicare.gov). Open enrollment runs October 15 to December 7 each year (Medicare.gov).

What this means in plain English

Applying for Medicare means enrolling in Part A, which is hospital insurance, and Part B, which is medical insurance. You do this through Social Security, not through an insurance company. Private coverage comes after that step. You might choose Medicare Advantage, or a Medigap policy plus a Part D drug plan. Private companies sell those plans, and you need Parts A and B in place before you can pick one.

Why choose when to apply for Medicare

Timing is the main choice you control. If you're retiring at 65, signing up early in your window avoids a gap in coverage. If you or your spouse still work and have group health coverage, you can often delay Part B. You then get 8 months to sign up after that job or coverage ends (Medicare.gov). The right choice depends on your employer's plan, so check it before you skip Part B. ### Special enrollment period versus general enrollment period These two windows work very differently. The Special Enrollment Period gives you 8 months after job-based coverage ends, so it starts whenever that coverage stops (Medicare.gov). Compared with that, the General Enrollment Period only runs January 1 to March 31, and coverage starts the month after you sign up. You may also owe a Part B late penalty if you use the General Enrollment Period (Medicare.gov). ### What a late penalty looks like The Part B penalty grows over time. Say your Initial Enrollment Period ended and you waited 2 full years to sign up, with no job-based coverage. Your Part B premium could be 20% higher, since the penalty adds 10% for each full 12-month period you went without Part B (Medicare.gov). In most cases, you pay that penalty for as long as you have Part B.

How it works

First, find your birthday month and count back 3 months. Next, see whether you're already getting Social Security. If you aren't, apply online or by phone (SSA.gov). Once Part B starts, your Medigap open enrollment period begins. It lasts 6 months from the month you're 65 and enrolled in Part B (Medicare.gov). After that, a licensed agent can compare plans against your doctors and prescriptions. Plan availability varies by location. ### A date example you can copy For example, say you turn 65 in July. Your Initial Enrollment Period runs from April 1 through October 31 (Medicare.gov). If you sign up between April and June, coverage starts July 1. If you wait until July or later, coverage starts the first day of the month after you sign up. So an early sign-up is the simplest way to avoid a gap.

Get started today

The Medicare Store is an independent, licensed agency. A local agent maps out your dates for free and compares plans from several carriers. You can meet by phone, by text, in offices in Nevada (Las Vegas and Reno), Arizona (Phoenix), New Mexico (Albuquerque) and Texas (McAllen and Laredo), or at home on request. Help is available in English and Spanish. After you enroll, your agent checks in six times the first year and twice a year after that. Your coverage also gets a review every fall.

What to do next

Your next step is to write down the month you turn 65 and count back 3 months. That is the earliest date you can apply. If you want a second set of eyes on your dates, call or text 888-333-5853 or schedule a free meeting with a licensed local agent at The Medicare Store. Bring your birth date, any employer coverage details and your prescription list. This page is for information only. Talk with a licensed Medicare agent about your situation.