You qualify for a Health Savings Account if you are covered by a qualifying High-Deductible Health Plan, have no disqualifying health coverage on the side, are not enrolled in Medicare, and are not claimed as a dependent on someone else’s tax return. All four conditions must be true at the same time. The plan type is the biggest factor, but the other three catch people off guard more often than you’d expect.
The High-Deductible Health Plan Requirement
The IRS sets specific dollar thresholds each year that determine whether a health plan counts as a “High-Deductible Health Plan” for HSA purposes. Your plan has to meet both a minimum deductible and a maximum out-of-pocket limit. For 2025, a self-only HDHP must carry a deductible of at least $1,650 and cap out-of-pocket costs at $8,300 or less. For family coverage, the minimums are a $3,300 deductible and $16,600 out-of-pocket maximum. These numbers are adjusted for inflation each year, so what qualifies shifts slightly from one year to the next.
Having a high deductible alone is not enough. A plan with a $3,000 deductible but an out-of-pocket maximum of $20,000 would fail the test because the out-of-pocket cap is too high. Both thresholds matter. Most employer-sponsored plans that are marketed as “HDHP” or “HSA-eligible” have already been designed to land within these limits, but if you bought coverage on the individual market or through a health insurance exchange, you should verify the numbers yourself. Your plan’s Summary of Benefits and Coverage document lists both figures.
One wrinkle worth knowing: the deductible requirement means the plan generally cannot pay for anything before you hit that deductible, with a few built-in exceptions. Preventive care, like annual physicals, immunizations, and certain screenings, can be covered at no cost before the deductible without disqualifying the plan. The IRS has also expanded the list of pre-deductible services that HDHPs can cover, including certain chronic-condition treatments like insulin and blood-pressure medication, though not all plans choose to include those.
Disqualifying Coverage
Being on an HDHP is necessary but not sufficient. You also cannot have what the IRS calls “other health coverage” that is not an HDHP. This is where eligibility gets complicated, because certain types of additional coverage will knock you out even if your primary plan qualifies.
A general-purpose Flexible Spending Account is the most common disqualifier people don’t see coming. If your employer offers an FSA and you elected to contribute to it, that counts as non-HDHP coverage and makes you ineligible for an HSA, even if your health plan itself is a qualifying HDHP. The exception is a “limited-purpose FSA,” which restricts reimbursements to dental and vision expenses only. A limited-purpose FSA does not disqualify you. If your spouse has a general-purpose FSA through their employer that could reimburse your medical expenses, that can also be a problem.
Other types of coverage that typically disqualify you include a spouse’s non-HDHP plan that also covers you, a Health Reimbursement Arrangement that can pay for general medical expenses before you meet your deductible, and TRICARE or VA benefits that cover non-service-connected care. Coverage that does not disqualify you includes dental insurance, vision insurance, long-term care insurance, disability insurance, and workers’ compensation. The general rule is that if the additional coverage could pay for medical expenses that would otherwise count toward your HDHP deductible, it’s a problem.
Medicare Enrollment Ends HSA Eligibility
Once you enroll in any part of Medicare, whether Part A, Part B, or Part D, you are no longer eligible to contribute to an HSA. This is straightforward in concept but messy in practice, especially around age 65.
If you are still working at 65 and have employer-sponsored HDHP coverage, you can delay Medicare enrollment and keep contributing to your HSA. But if you start collecting Social Security benefits at or after 65, you will be automatically enrolled in Medicare Part A, which ends your HSA eligibility. You cannot decline Part A while receiving Social Security. This creates a trap for people who planned to keep contributing: they start Social Security, Part A kicks in retroactively (sometimes up to six months back), and suddenly their recent HSA contributions were technically ineligible.
You can still use money already in your HSA after enrolling in Medicare. The account doesn’t close. You just can’t put new money in. Many people build up their HSA balances during working years specifically to spend them down in retirement on Medicare premiums, out-of-pocket costs, and other qualified medical expenses.
The Dependent Rule
If someone else can claim you as a dependent on their tax return, you cannot open or contribute to your own HSA, even if you have qualifying HDHP coverage. This mostly affects young adults on a parent’s health plan. You can be covered under a parent’s HDHP up to age 26 under the Affordable Care Act, but if your parent claims you as a dependent, you cannot contribute to an HSA yourself. If you file your own tax return and no one claims you, you can contribute to your own HSA even while on a parent’s HDHP, as long as that plan meets the HDHP thresholds.
The parent, on the other hand, can still contribute to their own HSA based on their family HDHP coverage. They just cannot make contributions specifically designated for the dependent child’s HSA.
How to Verify Your Own Eligibility
If you get insurance through an employer, start with your benefits enrollment materials. Plans that qualify for HSA pairing are almost always labeled “HDHP” or “HSA-eligible” in the enrollment portal. If the label is not there, call your benefits administrator and ask two specific questions: does the plan meet the IRS minimum deductible for the current year, and does the out-of-pocket maximum fall at or below the IRS limit? If both answers are yes and the plan does not cover non-preventive services before the deductible (other than IRS-approved exceptions), you likely have a qualifying plan.
If you buy insurance on the individual market, check the plan’s Summary of Benefits and Coverage for the deductible and out-of-pocket maximum, then compare those numbers against the current year’s IRS thresholds, which are published in IRS Revenue Procedures each spring for the following year. Marketplace plans sometimes note HSA compatibility, but not always.
Then run through the other three conditions: no disqualifying coverage, no Medicare, and not a dependent. If all four boxes check out, you qualify.
Common Situations That Trip People Up
A few real-world scenarios cause more confusion than the basic rules suggest.
- Spouse’s FSA: If your spouse enrolls in a general-purpose FSA at their job, and that FSA could reimburse your medical expenses, your HSA eligibility is at risk. The fix is either to skip the FSA or convert it to a limited-purpose FSA. Not every employer offers the limited-purpose option, which forces couples to choose between the two accounts.
- Mid-year plan changes: If you switch from an HDHP to a non-HDHP (or vice versa) during the year, your contribution limit is prorated based on how many months you were eligible. The IRS uses a “last-month rule” that can let you contribute the full annual amount if you are eligible on December 1, but you must then stay eligible through the following December or face taxes and penalties on the excess.
- COBRA coverage: If you lose your job and elect COBRA continuation of an HDHP, that COBRA plan still qualifies as an HDHP. You can keep contributing to your HSA during COBRA, though you’ll be paying both the premiums and the contributions out of pocket.
- Veterans with VA care: If you receive VA benefits for a service-connected disability, that does not disqualify you from an HSA. But if you receive VA medical care for non-service-connected conditions within the prior three months, you lose eligibility for those months. The timing matters and trips up veterans who use VA facilities for general care.
Having an HDHP Does Not Mean You Have an HSA
A surprising number of people enrolled in qualifying HDHPs never actually open an HSA. A national survey of over 1,600 Americans with high-deductible plans found that HDHPs can be linked to HSAs but usually are not, and that employer contributions to the HSA were the most common factor that got people to actually start saving in one.1Project HOPE / Health Affairs. A Survey Of Americans With High-Deductible Health Plans Identifies Opportunities To Enhance Consumer Behaviors Being eligible and being enrolled are two different things. If your employer offers an HDHP and you chose it, you still need to take the step of opening an HSA, either through a custodian your employer partners with or through a bank or financial institution on your own.
When your employer facilitates the HSA, contributions can come out of your paycheck pre-tax, which also avoids FICA taxes (Social Security and Medicare taxes). If you open an HSA independently, you contribute with after-tax dollars and then take a deduction on your tax return, which recovers income tax but not FICA. The pre-tax payroll route saves you an extra 7.65% on every dollar contributed, so the employer-connected path is worth using when it’s available.
Contribution Limits and the Catch-Up Provision
For 2025, the maximum you can contribute to an HSA is $4,300 for self-only coverage and $8,550 for family coverage. If you are 55 or older and not yet on Medicare, you can contribute an additional $1,000 per year as a catch-up contribution. These limits include both your own contributions and any contributions your employer makes on your behalf. If your employer puts $500 into your HSA, your personal contribution limit drops by that $500.
The contribution limit is based on what type of HDHP coverage you have, not how many people are in your family. If you carry self-only HDHP coverage, you get the self-only limit even if you have a spouse and children on a different plan. If you carry family HDHP coverage, you get the family limit even if the only people on the plan are you and one child.
When both spouses have their own HDHPs with self-only coverage, each can have their own HSA and contribute up to the self-only limit. When one spouse has family HDHP coverage, the family contribution limit is shared between both spouses’ HSAs combined. They can split it however they want, but the total across both accounts cannot exceed the family maximum.
What You Can Actually Spend HSA Money On
Eligibility to contribute is one question; what you can buy with the money is another, and the two are governed by different rules. HSA funds can be spent on a broad list of IRS-qualified medical expenses, including doctor visits, prescriptions, dental work, vision care, mental health services, and medical equipment. Since 2020, over-the-counter medications and menstrual products also qualify without a prescription.
You can use HSA money on qualified expenses for yourself, your spouse, and your tax dependents, even if they are not on your HDHP. A parent with an HSA can pay for a child’s braces or a spouse’s therapy sessions. The account holder does not need to be the patient.
If you spend HSA money on non-qualified expenses before age 65, you owe income tax on the amount plus a 20% penalty. After 65, the penalty goes away, and non-qualified withdrawals are taxed as ordinary income, essentially making the HSA function like a traditional retirement account for non-medical spending. This is one reason financial advisors sometimes recommend maximizing HSA contributions even for healthy people: the account works as a secondary retirement savings vehicle with a medical bonus.
Keeping Your HSA When You Change Plans or Jobs
An HSA belongs to you, not your employer. If you leave a job, your HSA balance goes with you. You can transfer it to a new custodian, leave it where it is, or roll it into a different HSA. There is no vesting period and no forfeiture, unlike an FSA where unspent money can be lost at year’s end.
If you switch from an HDHP to a traditional plan mid-year, you stop being eligible to contribute as of the month the coverage changes. But the money already in the account stays yours and can still be spent on qualified expenses indefinitely. There is no deadline to spend HSA funds. Receipts from five years ago can be reimbursed today, as long as the expense occurred after the HSA was established. Some people deliberately pay medical bills out of pocket, keep the receipts, and let their HSA balance grow tax-free for years before reimbursing themselves, effectively using the account as a long-term investment.
When you do lose HDHP coverage, the transition to non-eligible status can be awkward if you used the last-month rule to contribute the full annual amount. In that case, you may need to withdraw the excess contributions or face a 6% excise tax on the overage for each year it remains in the account. Tracking your eligible months carefully is worth the effort if your coverage situation changes during the year.
State Tax Treatment Varies
At the federal level, HSA contributions are tax-deductible, growth inside the account is tax-free, and qualified withdrawals are tax-free. This triple tax advantage is the main selling point. But not every state follows the federal treatment. California and New Jersey, for example, do not recognize HSAs as tax-advantaged accounts at the state level. If you live in one of those states, you owe state income tax on your contributions, on interest and investment gains inside the account, and you need to report HSA activity on your state return. This does not affect your federal benefits, but it reduces the overall tax advantage and adds some paperwork. If you live in a state with no income tax, the issue is moot. For everyone else, the federal treatment flows through to the state return automatically.