You have to be 65 years old to collect Medicare. That’s the standard eligibility age, and it hasn’t changed since the program launched in 1966. There are exceptions that allow younger people to qualify, but they’re based on specific medical conditions or disabilities, not early retirement.
The Standard Age: 65
At 65, you become eligible for Medicare regardless of whether you’re still working, already retired, or haven’t yet claimed Social Security. These are separate programs with separate age rules. You can start Social Security retirement benefits as early as 62, but doing so does not give you early access to Medicare. You still have to wait until 65 for that.
Your enrollment window, called the Initial Enrollment Period, lasts seven months. It starts three months before your 65th birthday month and ends three months after it. If you’re already receiving Social Security benefits when you turn 65, you’ll be enrolled in Medicare automatically. If you’re not collecting Social Security yet, you need to sign up yourself through the Social Security Administration.
Who Can Get Medicare Before 65
Three groups of people qualify for Medicare before age 65:
- People receiving Social Security disability benefits. If you’ve been approved for Social Security Disability Insurance (SSDI), you’ll be enrolled in Medicare automatically after 24 months of receiving disability payments. The clock starts from the date your disability benefits begin, not from when you applied.
- People with ALS (Lou Gehrig’s disease). There is no 24-month waiting period for ALS. Medicare coverage begins as soon as your disability benefits start.
- People with end-stage renal disease (ESRD). If your kidneys have permanently failed and you need regular dialysis or a kidney transplant, you can qualify for Medicare at any age. You or your spouse must have enough work credits under Social Security, or you must already be receiving Social Security benefits.
How ESRD Coverage Timelines Work
If you qualify through kidney failure, the exact start date of your coverage depends on your treatment. For dialysis, Medicare coverage usually begins on the first day of the fourth month of treatments. So if you start dialysis in January, coverage would typically kick in on April 1. That waiting period can be eliminated if you train for home dialysis at a Medicare-certified facility during your first three months of treatment.
For a kidney transplant, coverage can start the month you’re admitted to a Medicare-certified hospital for the transplant, as long as the surgery happens that same month or within the next two months. If your transplant gets delayed beyond that window, coverage can start two months before the actual procedure.
What It Costs at 65
Medicare has two main parts that cover different things. Part A handles hospital stays and is free for most people, because it’s funded through payroll taxes you paid during your working years. To get Part A at no cost, you generally need about 10 years (40 quarters) of work history where Medicare taxes were withheld. If you don’t have enough work credits, you can still buy Part A, but you’ll pay a monthly premium and you must also enroll in Part B.
Part B covers doctor visits, outpatient care, and preventive services. It costs $185.00 per month in 2025. Higher earners pay more: if your modified adjusted gross income is above $106,000 as an individual filer or $212,000 on a joint return, your Part B premium increases on a sliding scale. At the top end, individuals earning $500,000 or more pay $628.90 per month.
The Cost of Signing Up Late
If you don’t enroll in Part B during your Initial Enrollment Period and you don’t have qualifying coverage through an employer, you’ll face a permanent penalty. Your Part B premium goes up by 10% for every full 12-month period you could have had coverage but didn’t. That surcharge never goes away.
For example, if you delayed enrollment by two years without qualifying employer coverage, you’d pay a 20% penalty on top of your monthly premium for as long as you have Part B. Based on 2026 numbers, that would mean paying roughly $243.50 per month instead of the standard $202.90. Over a decade or more of Medicare coverage, that adds up to thousands of dollars in extra costs for simply missing your enrollment window.
Retiring Early Doesn’t Mean Early Medicare
This is one of the most common points of confusion. If you retire at 62, 60, or even earlier, you won’t have Medicare until 65. That gap between early retirement and Medicare eligibility is something you’ll need to plan for, whether through a spouse’s employer plan, COBRA continuation coverage, or a marketplace health insurance plan. Social Security retirement benefits and Medicare eligibility are not linked by age. Collecting one early does not trigger the other.