You can go on Medicare without collecting Social Security, and plenty of people do, especially those delaying retirement benefits to grow their monthly checks. The two programs run independently. The catch is that if you aren’t already drawing Social Security when you turn 65, nobody enrolls you in Medicare for you. You have to sign up yourself during a specific window, and you’ll pay premiums directly instead of having them pulled from a benefit deposit.1Social Security Administration. When to Sign Up for Medicare
You Won’t Be Enrolled Automatically
If you’re already collecting Social Security or Railroad Retirement benefits at 65, Medicare Parts A and B start automatically and your card shows up in the mail. That path only applies if your retirement benefits are already turned on.1Social Security Administration. When to Sign Up for Medicare
If you’re waiting until 67 or 70 to claim Social Security, you’re on your own for Medicare. This is where people who delay benefits most often slip up. They assume Medicare will start at 65 the way it does for everyone else, miss the enrollment window, and pay for it in permanent penalties.
Whether You Still Qualify
Medicare eligibility at 65 has nothing to do with whether you’re drawing retirement benefits. It turns on age, legal status, and work history. You qualify for Part B at 65 if you’re a U.S. citizen or a lawful permanent resident who has lived in the country continuously for at least five years before applying.2Office of the Law Revision Counsel. 42 USC 1395o – Eligible Individuals
Most people get Part A at no monthly cost because they or a spouse earned at least 40 Social Security work credits over their career. In 2026, one credit equals $1,890 in covered wages, up to four credits per year, so roughly 10 years of work gets you there.3Social Security Administration. Social Security Credits Those credits sit in your record whether or not you’ve started drawing benefits.4Office of the Law Revision Counsel. 42 USC 1395c – Description of Program
If you don’t have 40 credits, you can still buy Part A. In 2026 the premium is $311 a month with 30 to 39 credits, and $565 a month with fewer than 30. To purchase Part A this way, you also have to enroll in Part B.5Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles6Centers for Medicare & Medicaid Services. Enrolling in Medicare Part A and Part B
When to Sign Up
Missing your window is the costliest mistake in this process. There are three enrollment periods, and only two of them get you in without a penalty.
Initial Enrollment Period
Your first shot is a seven-month window: the three months before your 65th birthday month, that birthday month, and the three months after. Sign up in the first three months and coverage generally begins the first day of your birthday month. Wait until the tail end and your start date slides by one to three months.7Medicare. When Does Medicare Coverage Start
Special Enrollment Period for People Still Working
If you’re still working at 65 and have group health coverage through your job or a spouse’s job, you can delay Medicare without penalty. When that coverage ends, you get an eight-month Special Enrollment Period. Your employer verifies the coverage dates on Form CMS-L564, which you submit with your Part B application.8Centers for Medicare & Medicaid Services. Form CMS-L564 Request for Employment Information
General Enrollment Period
Miss both of the above and your fallback is the General Enrollment Period, January 1 through March 31 each year. Coverage starts the month after you sign up, and a late-enrollment penalty will apply, potentially for the rest of your life.9Centers for Medicare & Medicaid Services. Application for Enrollment in Medicare Part B
How to Apply
The Social Security Administration processes Medicare enrollments even when you’re not drawing retirement benefits. Online is fastest: go to ssa.gov, choose “Apply for Medicare Only,” sign into your my Social Security account, and fill out the application. It runs 10 to 30 minutes.10Social Security Administration. Apply Online for Medicare – Even if You Are Not Ready to Retire
If you already have Part A and need to add Part B, use Form CMS-40B. It asks for your name, address, Medicare number, and whether you have group health plan coverage.9Centers for Medicare & Medicaid Services. Application for Enrollment in Medicare Part B If you’re enrolling during a Special Enrollment Period, submit Form CMS-L564 along with it. You complete Section A; your employer fills in Section B to confirm coverage dates.8Centers for Medicare & Medicaid Services. Form CMS-L564 Request for Employment Information
You can mail the forms to your local Social Security field office or book an in-person appointment. After you submit, expect a confirmation letter and then your Medicare card within several weeks of approval. Application status is trackable through your my Social Security account.11Social Security Administration. Check Application or Appeal Status
Paying Premiums Without a Benefit Check
When there’s no Social Security payment to deduct from, Medicare bills you directly on Form CMS-500, a paper invoice mailed to your home. Part B is billed every three months. Part A, if you’re buying it, is billed monthly. Any Part D income-related surcharge is also billed monthly. Premium bills are due on the 25th of the month, and payment should go in at least five business days ahead of that to avoid being marked late.12Medicare. How to Pay Part A and Part B Premiums
Medicare Easy Pay is the better option for most people. It pulls the premium from a bank account automatically, so nothing slips. Sign up through your Medicare account online or by mailing Form SF5510. Automatic deductions take six to eight weeks to start, so keep paying manually in the meantime.13Medicare. Medicare Easy Pay Falling behind can end your coverage; if Part B is terminated for nonpayment, you’d wait for the next General Enrollment Period to re-enroll and face late-enrollment penalties on top of any existing ones.
The standard Part B premium for 2026 is $202.90, with an annual deductible of $283. Higher earners pay more through the Income-Related Monthly Adjustment Amount (IRMAA), which uses your tax return from two years earlier. For 2026 premiums, that’s your 2024 return. The surcharge starts above $109,000 in modified adjusted gross income for single filers and $218,000 for joint filers, and rises through several brackets to $689.90 a month at the top.5Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
IRMAA hits people delaying Social Security especially hard, because many are still working and earning at their peak in the years that feed the two-year lookback. If your income has dropped because of retirement, divorce, or a spouse’s death, you can ask the SSA to use more recent income by filing Form SSA-44, which lists the qualifying life-changing events.14Social Security Administration. Medicare Income-Related Monthly Adjustment Amount – Life-Changing Event
Late Enrollment Penalties
For every full 12-month period you were eligible for Part B and didn’t sign up, your premium goes up by 10%. The surcharge is recalculated against the current year’s standard premium and lasts as long as you have Part B, which for most people means for life. Two years of delay is a 20% surcharge every month going forward. On a 2026 premium of $202.90, that’s an extra $40.58 a month, nearly $490 a year, permanently.15Medicare. Avoid Late Enrollment Penalties5Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
Part D has its own penalty. Go 63 consecutive days or more without Part D or other creditable drug coverage and a surcharge kicks in: 1% of the national base beneficiary premium ($38.99 in 2026) times the number of full months you went uncovered, rounded to the nearest ten cents, added to your Part D premium for as long as you have it.16Medicare. How Much Does Medicare Drug Coverage Cost Creditable coverage means a plan that pays at least as much as a standard Part D plan. Employer plans, union plans, TRICARE, and VA coverage often qualify; ask the plan administrator, and expect an annual notice. Discount cards and drug discount websites do not count.17Medicare. Creditable Prescription Drug Coverage
The HSA Trap for People Delaying Social Security
If you’re delaying Social Security while staying on an employer high-deductible health plan and contributing to a Health Savings Account, watch this carefully. Once you enroll in any part of Medicare, your HSA contribution limit drops to zero. Not reduced. Zero. Starting the first month you’re enrolled, you can no longer contribute.18Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
Part A makes this worse because of retroactive coverage. Enroll in Part A after 65 and coverage is backdated up to six months, though not before the month you turned 65.1Social Security Administration. When to Sign Up for Medicare Any HSA contributions made during that retroactive stretch become excess contributions and can trigger a 6% excise tax each year they sit in the account.18Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
The practical move: if you plan to enroll in Part A after 65, stop HSA contributions at least six months before your enrollment date. You can still spend existing HSA funds tax-free on qualified medical expenses after enrolling; the restriction is on new contributions. The 2026 limits you’d be giving up are $4,400 for self-only coverage and $8,750 for family, plus a $1,000 catch-up at 55 or older.18Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
One more thing to plan around: if you later start collecting Social Security, you’re automatically enrolled in Part A, which triggers the same HSA prohibition. If you’re delaying Social Security partly to preserve HSA eligibility, time both decisions together.