What Does HSA-Eligible Mean: HDHPs, Expenses, and Limits

“HSA eligible” carries two different meanings, and knowing which one applies to your question saves a lot of confusion. It can describe you — whether you qualify to open and put money into a Health Savings Account — or it can describe an expense, meaning a cost you’re allowed to pay for tax-free with HSA funds. Both come from IRS rules, and both have to be satisfied for the account to work the way it’s intended. For 2026, someone who meets every eligibility test can contribute up to $4,400 with self-only coverage or $8,750 with family coverage, plus a $1,000 catch-up if they’re 55 or older.¹

Who Is HSA Eligible to Contribute

Personal eligibility has four parts, and you have to clear all of them.

The first is your insurance. You must be covered by a High Deductible Health Plan. For 2026, that means an annual deductible of at least $1,700 for self-only coverage or $3,400 for family coverage, with out-of-pocket costs (premiums aside) capped at $8,500 and $17,000 respectively.² The plan also can’t pay for anything beyond preventive care until you hit that deductible.³

The second is that you can’t have disqualifying secondary coverage. A general-purpose Flexible Spending Account, a spouse’s non-HDHP plan that also covers you, or most other health coverage that pays before your deductible will block eligibility. Limited-purpose FSAs that cover only dental or vision are allowed. Veterans receiving VA care for a service-connected disability can still contribute; VA treatment for a non-service-connected condition disqualifies contributions for three months afterward.

The third is Medicare. Once you enroll in any part of Medicare, contributions have to stop for the months following your effective date. You can keep spending existing HSA funds tax-free on qualified expenses, but no new deposits.⁴

The fourth is that no one else can claim you as a dependent on their tax return. If someone does, you can’t deduct HSA contributions even when you’re on a qualifying HDHP through your own job.³

Contributing when you’re not eligible triggers a 6% excise tax on the excess amount for every year it stays in the account.⁵ The tax keeps compounding annually until you withdraw the excess, so catching an error quickly matters.

Which Plans Count as HDHPs in 2026

Beyond the standard deductible and out-of-pocket thresholds, the One Big Beautiful Bill Act expanded the pool of HSA-compatible plans starting in 2026. Bronze-level and catastrophic plans sold through the health insurance marketplace now qualify as HDHPs regardless of whether they meet the usual deductible or out-of-pocket limits. The IRS has clarified that bronze and catastrophic plans purchased outside the marketplace count too.⁶

The same law permanently allows a plan to cover telehealth and remote care before the deductible without losing HDHP status, and it makes direct primary care arrangements compatible with HSA eligibility for the first time.⁶

Contribution Limits and the Filing-Deadline Window

The 2026 numbers are $4,400 for self-only HDHP coverage, $8,750 for family coverage, and an extra $1,000 for anyone 55 or older.¹ The IRS adjusts these amounts every year for inflation.

Those limits cover every dollar going into the account, from every source. If your employer puts in $2,000, your own remaining room drops by $2,000.⁷ Forgetting to count employer contributions is one of the most common ways people accidentally over-contribute.

You have until your tax filing deadline — typically April 15 of the following year — to make contributions for the prior tax year.⁴

Which Expenses Are HSA Eligible

Once the account is funded, withdrawals are tax-free when used for qualified medical expenses of you, your spouse, or your tax dependents. Family members don’t have to share your HDHP for their expenses to count — a spouse or child on a different plan can still have their bills paid from your HSA.⁴

The IRS defines qualified medical expenses broadly: costs for diagnosing, treating, or preventing disease, or for affecting the structure or function of the body.⁸ In practice that covers:

Doctor visits, specialists, lab work, surgery, physical therapy, and mental health care.
Dental and vision costs including eye exams, prescription glasses, contacts, fillings, extractions, and orthodontics.
Over-the-counter medications, which have been eligible without a prescription since the CARES Act.⁹
Menstrual care products (tampons, pads, liners, cups), permanently eligible under the same provision.⁹
Direct primary care fees paid under an arrangement that qualifies starting in 2026.⁶

Save receipts for every withdrawal. There’s no deadline for reimbursing yourself for a past qualified expense, so some people pay out of pocket now and take the money out of the HSA years later. Documentation is what makes that work if the IRS ever asks.

Insurance Premiums Are Usually Not Eligible

Regular health insurance premiums generally cannot be paid from an HSA. The exceptions are narrow: COBRA continuation coverage after leaving a job, health insurance premiums while you’re receiving unemployment benefits, qualified long-term care insurance premiums (subject to age-based limits), and, once you’re 65 or older, Medicare premiums and other health coverage premiums. Nothing outside those categories qualifies.

What Doesn’t Qualify

The dividing line is medical necessity. Anything bought for general wellness rather than to treat or prevent a specific condition tends to fall outside the definition.

Cosmetic procedures are the clearest exclusion. Facelifts, teeth whitening, and hair transplants don’t qualify unless the procedure corrects a deformity from a congenital condition, an accident, or a disfiguring disease.⁸ Gym memberships, everyday toiletries like toothpaste and deodorant, and general nutritional supplements also don’t qualify. Life insurance premiums and funeral costs are excluded entirely.

Vitamins and supplements are the classic gray area. A daily multivitamin for general health isn’t eligible. The same supplement can become eligible if a doctor recommends it to treat a diagnosed condition and provides a letter of medical necessity.¹⁰ Weight-loss programs follow the same logic: ineligible for general fitness, eligible when a physician prescribes them as treatment for something like obesity or heart disease.

If you use HSA funds on a non-qualified expense, you owe income tax on that amount plus a 20% additional tax, reported on Form 8889.⁴ The 20% penalty disappears after you turn 65, become disabled, or die, but ordinary income tax on non-medical withdrawals still applies at any age.

Mid-Year Coverage Changes and the Last-Month Rule

Gaining or losing HDHP coverage partway through the year prorates your contribution limit. Divide the annual limit by 12 and multiply by the number of months you were eligible. Eligibility for a given month depends on your coverage on the first day of that month.⁴

The last-month rule is the exception. If you’re HSA eligible on December 1, the IRS treats you as eligible for the whole year and lets you contribute the full annual amount even if you only enrolled in an HDHP partway through. The condition: you have to stay eligible through the entire following year, called the testing period. Drop your HDHP coverage during the testing period and the excess contributions get added back to taxable income, with an additional 10% tax on the shortfall.⁴

A State Tax Note

The federal tax treatment of HSAs — deductible contributions, tax-free growth, tax-free qualified withdrawals — doesn’t carry over in every state. California and New Jersey tax HSA contributions and investment earnings at the state level. If you live in either, your payroll contributions won’t reduce state taxable income, and growth inside the account is subject to state income tax. The federal benefits still apply.

1
IRS.gov. Notice 2026-5 – Expanded Availability of Health Savings Accounts Under OBBBA
2
IRS.gov. Rev. Proc. 2025-19
3
Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
4
Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
5
Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts
6
IRS.gov. Treasury, IRS Provide Guidance on New Tax Benefits for HSA Participants Under OBBBA
7
IRS.gov. HSA Contributions – IRS Courseware
8
Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses
9
IRS.gov. IRS Outlines Changes to Health Care Spending Available Under CARES Act
10
Internal Revenue Service. Publication 502 – Medical and Dental Expenses