For most people, yes — Medicare Part A hospital insurance comes with no monthly premium. But “free” only refers to the premium. Even people who qualify for premium-free Part A still face a deductible and coinsurance charges when they’re actually hospitalized, and a smaller group of people do pay a monthly premium for Part A because they didn’t work long enough in Medicare-covered jobs.
Here’s the full picture: how you qualify for free Part A, what it still costs you when you use it, and what happens if you have to pay for it.
The 40-quarter rule: why some people pay nothing
Part A is funded largely through payroll taxes — the 1.45% Medicare tax that comes out of nearly every paycheck, matched by employers. The idea is straightforward: you (or your spouse) paid into the system for years, so you’ve effectively already prepaid your Part A premium.
The system tracks this in “quarters of coverage,” the same work credits the Social Security Administration uses to determine retirement and disability eligibility. You earn one credit for a set amount of covered earnings in a quarter, up to four credits per year. Once you’ve accumulated 40 credits — roughly 10 years of work where Medicare taxes were withheld — you qualify for premium-free Part A at 65, according to SSA.gov and Medicare.gov.
You don’t have to earn those 40 credits yourself. You also get premium-free Part A if:
- Your current or former spouse has 40 credits (including divorced spouses, if the marriage lasted at least 10 years)
- You’ve received Social Security Disability Insurance (SSDI) for 24 months
- You have End-Stage Renal Disease (ESRD) requiring dialysis or a transplant, or ALS (Lou Gehrig’s disease), which trigger Medicare eligibility on a different timeline
If you have fewer than 40 credits, you can still buy Part A
People who worked fewer than 40 quarters in Medicare-covered employment can still enroll in Part A — they just pay a monthly premium for it, similar to how Part B works for everyone. The amount depends on how many credits you have.
| Work credits | 2026 monthly Part A premium | Status |
|---|---|---|
| 40+ credits | $0 | Premium-free |
| 30–39 credits | $311/month | Reduced premium |
| Fewer than 30 credits | $565/month | Full premium |
CMS releases the following year’s Part A premium and deductible amounts every fall. The 2026 amounts above were finalized by CMS on November 14, 2025; the 2027 figures are expected in the fall of 2026 and will be posted on CMS.gov and Medicare.gov.
If you’re paying the full Part A premium, that’s a real monthly bill on top of Part B ($202.90/month for most people in 2026, before any income-related surcharge). For someone with no premium-free path — say, a longtime freelancer who paid self-employment tax on limited income, or someone who spent most of their career outside the U.S. — Part A and Part B together can run over $760 a month before you’ve received a single service.
Even “free” Part A isn’t free at the hospital
This is the part people most often miss. Premium-free Part A means you don’t pay a monthly bill for the coverage itself. It does not mean hospital stays are free. Part A works on a deductible-and-coinsurance structure tied to something called a “benefit period,” which starts the day you’re admitted as an inpatient and ends after you’ve gone 60 days in a row without inpatient hospital or skilled nursing care.
| Cost type | 2026 amount | When it applies |
|---|---|---|
| Inpatient hospital deductible | $1,736 per benefit period | Charged at the start of each new benefit period, not once a year |
| Days 1–60 | $0 coinsurance | Covered in full after the deductible |
| Days 61–90 | $434/day | Coinsurance kicks in |
| Lifetime reserve days (60 total, used once) | $868/day | After day 90, drawn from a lifetime bank of 60 extra days |
| Skilled nursing facility, days 1–20 | $0 | Covered in full |
| Skilled nursing facility, days 21–100 | $217/day | Coinsurance |
| Beyond day 100 in a benefit period | Full cost | Medicare stops paying |
These are the 2026 amounts CMS finalized on November 14, 2025. They’re adjusted annually, so check CMS.gov for the 2027 figures when they’re released in the fall of 2026.
Notice something important: the deductible isn’t annual like Part B’s. It applies per benefit period. If you’re hospitalized in March, come home, and get readmitted in July after more than 60 days out of the hospital, you owe a second $1,736 deductible. If you’re readmitted within the same benefit period, you don’t pay it again.
A worked example
Take Diane, 67, retired after 32 years of covered work — well past the 40-credit threshold — so she has premium-free Part A. In February, she’s hospitalized for a hip fracture and stays 12 days.
- She pays the $1,736 inpatient deductible for that benefit period.
- Because her stay is under 60 days, she owes no daily coinsurance.
- Total out-of-pocket for Part A on that stay: $1,736.
Now suppose her recovery requires a skilled nursing facility stay afterward — 35 days total.
- Days 1–20: no charge under Part A.
- Days 21–35 (15 days): $217/day × 15 = $3,255.
Diane’s premium-free Part A saved her the monthly bill, but the hospitalization and rehab stay still cost her roughly $5,000 out of pocket. This is exactly why most people pair Part A with either a Medicare Supplement (Medigap) policy, which covers some or all of this cost-sharing, or a Medicare Advantage plan with its own cost structure and out-of-pocket maximum. Without one of those, the deductible and coinsurance land squarely on the patient.
When you sign up matters, too
If you’re eligible for premium-free Part A, sign up during your Initial Enrollment Period — the seven-month window centered on your 65th birthday month — even if you plan to delay Part B because you have employer coverage. There’s no downside to taking free Part A early, and delaying it without a valid reason (like active employer coverage through a large employer) can expose you to a late enrollment penalty if you eventually need to buy Part B or Part D later.
If you have to pay for Part A because you have fewer than 40 credits, and you miss your Initial Enrollment Period without qualifying employer coverage, you may face a 10% premium penalty, paid for twice the number of years you delayed, according to Medicare.gov. That penalty structure is one more reason to check your eligibility status well before turning 65 rather than after.
How to check your own quarters and premium status
The Social Security Administration tracks your work credits, and you can see your earnings history through a “my Social Security” account at SSA.gov. If you’re unsure whether you’ll have premium-free Part A, don’t guess — call Social Security at 1-800-772-1213 or check your account online before you turn 65. If it turns out you’ll owe a premium, you’ll want that number in your retirement budget well ahead of time, not as a surprise on your first bill.
FAQ
Does everyone get Medicare Part A automatically at 65?
If you’re already receiving Social Security or Railroad Retirement benefits when you turn 65, you’re enrolled in Part A automatically, and it’s premium-free if you have 40 work credits. If you haven’t filed for Social Security yet, you need to actively sign up during your Initial Enrollment Period through SSA.gov or your local Social Security office.
Can I get premium-free Part A based on my spouse’s work record if we’re divorced?
Yes. If your marriage lasted at least 10 years and you’re not currently married, you can qualify for premium-free Part A using your ex-spouse’s 40 credits, even if they haven’t filed for their own benefits yet. Confirm the specific requirements with SSA.gov, since divorced-spouse rules have additional conditions.
If I pay a monthly premium for Part A, can that change over time?
Yes. If you’re paying the reduced ($311) or full ($565) 2026 premium because you have fewer than 40 credits, continuing to work in Medicare-covered employment can add credits toward the 40 threshold. If you reach 40 credits, your premium drops to $0 going forward — it’s reassessed based on your record, not locked in permanently.
Sources
- Medicare.gov — Part A costs: https://www.medicare.gov/basics/costs/medicare-costs
- CMS.gov — Medicare Parts A & B premiums and deductibles: https://www.cms.gov
- Social Security Administration — Medicare information: https://www.ssa.gov/benefits/medicare/
- SSA.gov — my Social Security account: https://www.ssa.gov/myaccount/
Related reading
- Social Security COLA for 2026: How Much Bigger Will Your Check Be?
- Medicare Open Enrollment: Dates, What You Can Change, and Costly Mistakes
- Medicare Advantage vs Original Medicare: A Plain-English Comparison