Most Medicare Advantage plans look broadly similar: a premium, a network, copays for visits, and an annual out-of-pocket maximum. Medical Savings Account plans are built on a different idea entirely. Medicare deposits money into a bank account in your name, you spend it on care, and the plan itself pays nothing until you have satisfied a high deductible. There is no premium for the health plan in most cases, no drug coverage at all, and a set of eligibility restrictions that exclude a large share of beneficiaries. MSA plans have existed for years and remain rare. Here is how they work in 2026 and where the pitfalls are.
The Two Parts
Part one: a high-deductible Medicare Advantage plan. It covers Medicare Part A and Part B services, but only after you meet an annual deductible that is considerably higher than what other Advantage plans use. Once the deductible is met, the plan generally pays 100% of Medicare-covered services for the rest of the year — which effectively makes the deductible function as your out-of-pocket maximum for those services.
Part two: a savings account funded by Medicare. The plan deposits money into a dedicated account once at the start of each calendar year, and you use it to pay for care. If you join mid-year — for example, when you first become eligible — both the deposit and the deductible are prorated for the remaining months.
One rule sets this apart from a Health Savings Account: you cannot contribute your own money to an MSA account. Only Medicare funds it. If you are weighing this against an HSA, our guide to HSA rules when you enroll in Medicare explains why the two cannot be combined.
The Gap Between the Deposit and the Deductible
The deposit is generally less than the deductible, and the difference is the amount you would pay out of your own pocket in a year where you use significant care.
A simplified illustration:
| Item | Example amount | |---|---| | Medicare's annual deposit to the account | $2,500 | | Plan's annual deductible | $4,000 | | Your exposure if you spend the full deposit | $1,500 |
After the deductible is met, the plan pays covered Part A and Part B services in full. Actual deposits and deductibles vary by plan and by year, and the only figures that matter are the ones in the specific plan's documents.
What counts toward the deductible: Medicare-covered Part A and Part B expenses, at the Medicare-approved amount. You may also use the account money for other qualified medical expenses — dental or vision care, for instance — but those amounts do not count toward the deductible.
Money Left Over, and Taxes
- Unspent money rolls over. Whatever remains at year end stays in the account, and the next year's deposit is added to it. Balances may earn interest
- Withdrawals for qualified medical expenses are not taxed. You file IRS Form 8853 with your tax return to report account activity
- Withdrawals for anything else are costly — the amount is subject to income tax plus an additional 50% penalty
- Leaving the plan mid-year has consequences. If you disenroll before the end of the year, you may have to return a prorated share of that year's deposit to Medicare
Because every withdrawal has to be documented at tax time, an MSA generally requires more recordkeeping than other Medicare coverage. Our guide to Medicare and taxes covers the broader tax picture.
What an MSA Does Not Include
Prescription drug coverage. MSA plans do not include Part D. If you want drug coverage, you must enroll in a standalone Part D plan separately — and going without creditable drug coverage may trigger a late enrollment penalty that lasts as long as you have Part D. Our Part D overview covers how standalone plans work.
Medigap. A Medicare Supplement policy cannot be used to cover an MSA plan's deductible, and insurers generally may not sell you one while you are enrolled in an MSA.
The standard Advantage out-of-pocket protections. Other Medicare Advantage plans must cap in-network out-of-pocket costs at no more than $9,250 in 2026. MSA plans are structured differently, and their deductibles can exceed that figure.
Your Part B premium still applies. As with any Medicare Advantage plan, you continue paying the Part B premium — $202.90 per month in 2026 for most people, more for those subject to the income-related surcharge.
Who Cannot Join
MSA eligibility is narrower than for other Advantage plans. You generally cannot enroll if:
- You have other health coverage that would cover the plan's deductible, including an employer or union retiree plan
- You are enrolled in another Medicare Advantage plan
- You receive benefits from the Department of Veterans Affairs or TRICARE
- You are a retired federal employee covered under FEHB
- You are eligible for Medicaid
- You are receiving hospice care
- You live outside the United States more than 183 days a year
Enrollment Timing Is Different
MSA plans do not follow the same enrollment calendar as other Medicare Advantage plans:
- You may generally join only during the Annual Enrollment Period (October 15 – December 7), for coverage starting January 1 — or when you are first eligible for Medicare
- The Medicare Advantage Open Enrollment Period (January 1 – March 31) cannot be used to join an MSA. That window allows a switch between Advantage plans or a return to Original Medicare
- If you change your mind, you may generally cancel an MSA enrollment through December 15, though joining a different health or drug plan for January 1 still requires acting by December 7
- Mid-year disenrollment may be possible with a Special Enrollment Period — for example, if you move out of the service area or become eligible for Medicaid
Availability and Trade-Offs
MSA plans are not offered in most areas, and the number of plans nationally has been small for years. Before spending much time on the idea, check whether any MSA plan is available where you live at medicare.gov/plan-compare.
If one is available, the factors that generally drive the comparison are:
- Your expected use of care. The deposit is fixed regardless of how much care you use; the deductible gap is what you absorb in a heavy-use year
- Whether you can cover the gap from savings if a hospitalization happens early in the year
- How you will handle drug coverage, since Part D must be purchased separately
- Whether you want Medigap, which is not compatible with an MSA
- Your willingness to track expenses for tax reporting
Our step-by-step plan comparison guide and guide to Medicare out-of-pocket limits can help you compare an MSA against other options side by side.
How to Get Help and Learn More
- Medicare.gov — Details and examples at medicare.gov/health-drug-plans/health-plans/your-health-plan-options/MSA.
- 1-800-MEDICARE (1-800-633-4227) — To find out whether an MSA plan is offered in your area. TTY users can call 1-877-486-2048.
- State Health Insurance Assistance Program (SHIP) — Free, unbiased counseling to compare an MSA with other coverage, at shiphelp.org.
Summary and Next Steps
- An MSA combines a high-deductible Medicare Advantage plan with a bank account Medicare funds once a year; you cannot contribute your own money
- The deposit is usually less than the deductible, and the difference is your exposure
- After the deductible, the plan generally pays 100% of covered Part A and Part B services
- Unspent funds roll over; qualified medical withdrawals are tax-free with Form 8853, and other withdrawals face income tax plus a 50% penalty
- MSA plans include no Part D coverage and are not compatible with Medigap; the Part B premium of $202.90 still applies in 2026
- Eligibility excludes people with VA or TRICARE benefits, FEHB retiree coverage, Medicaid eligibility, hospice care, and other groups
- Enrollment is generally limited to AEP (October 15 – December 7) or when first eligible
If an MSA is available in your area and the structure interests you, ask the plan for its current deposit and deductible figures in writing, then work out what a bad year would cost. A SHIP counselor can compare that against your other options at no charge.
