Most people have heard the term HSA, but far fewer understand what it actually is. A Health Savings Account is a tax-advantaged savings account that you can only open if you are enrolled in a qualifying high-deductible health plan. You contribute pre-tax money, it grows tax-free, and you can withdraw it tax-free for qualified medical expenses. If you use it for anything else before age 65, you pay income tax plus a 20% penalty on the amount withdrawn.
How Does A Health Savings Account HSA Work?
An HSA works like a personal medical bank account that comes with three separate tax breaks. The money you put in is deducted from your taxable income. Any interest or investment gains it earns are not taxed. And when you take money out to pay for qualified medical costs, that withdrawal is not taxed either.
That triple tax advantage is unusual. No other account in the US tax code works exactly this way. A 401(k) is taxed on withdrawal. A Roth IRA is taxed on contribution. An HSA is not taxed at either end, as long as the money is used for medical expenses.
The account belongs to you, not your employer. If you change jobs or lose your high-deductible plan, the money stays yours. You can still spend it on qualified medical expenses even after you are no longer enrolled in a qualifying plan. You just cannot contribute new money unless you are covered by an eligible plan again.
There is no deadline to use the funds. Unlike a Flexible Spending Account, which typically requires you to spend the money within the plan year or lose it, an HSA balance rolls over year after year. Some people treat it as a long-term investment account and let it grow for decades.
What Makes You Eligible To Open An HSA?
You must be covered by a high-deductible health plan that meets IRS requirements. For 2025, that means a deductible of at least $1,650 for self-only coverage or $3,300 for family coverage. The plan must also cap out-of-pocket expenses at no more than $8,300 for self-only coverage or $16,600 for family coverage.
These figures are set by the IRS and adjust periodically for inflation. The exact numbers can change from year to year, so it is worth checking the current IRS guidelines before you enroll.
Beyond the plan requirement, a few other rules apply:
- You cannot be claimed as a dependent on someone else’s tax return.
- You cannot be enrolled in Medicare.
- You generally cannot have other health coverage that is not a qualifying high-deductible plan, with limited exceptions.
One detail people often miss: a high-deductible plan and an HSA are not the same thing. The plan is the insurance. The HSA is the savings account. You need the plan to open the account, but having a high-deductible plan does not automatically create an HSA for you. You have to open one yourself or through your employer if they offer it.
How Much Can You Contribute To An HSA?
The IRS sets annual contribution limits. For 2025, you can contribute up to $4,300 for self-only coverage or $8,550 for family coverage. If you are 55 or older, you can add an extra $1,000 as a catch-up contribution.
These limits include any contributions your employer makes on your behalf. If your employer puts $1,000 into your HSA, that counts against your annual limit. The combined total from you and your employer cannot exceed the cap.
You can contribute to an HSA at any point up to the tax filing deadline for that year. So for 2025 contributions, you generally have until the April 2026 tax deadline to make them. This gives you some flexibility to adjust your contributions after the year ends if you realize you want to contribute more.
Contribution limits are typically adjusted annually. The numbers above reflect 2025 limits, and they may be different in future years.
What Counts As A Qualified Medical Expense?
The IRS defines qualified medical expenses fairly broadly. They include payments for diagnosis, treatment, prevention, and cure of disease, as well as payments for treatments affecting any structure or function of the body.
Common examples include doctor visits, hospital stays, prescription medications, lab tests, dental care, vision care including glasses and contacts, and mental health services. Over-the-counter medications generally require a prescription to qualify, though this rule has shifted at times and is worth verifying for the current tax year.
Some expenses that people assume are covered are not. Cosmetic procedures are typically excluded. Gym memberships are generally not qualified unless they are prescribed for a specific medical condition. Health insurance premiums are mostly not qualified, with a few exceptions such as premiums for COBRA coverage or long-term care insurance up to certain limits.
The IRS publishes a full list of qualified expenses in Publication 502. If you are unsure whether something qualifies, checking that document is more reliable than guessing.
What Happens If You Use HSA Money For Non-Medical Expenses?
Before age 65, any withdrawal that is not for a qualified medical expense is included in your taxable income and also hit with a 20% additional tax penalty. That penalty applies to the amount you withdrew, not your whole account balance.
After you turn 65, the penalty goes away. You can withdraw money for any reason, but if it is not for a qualified medical expense, you still owe income tax on it. At that point, an HSA starts to look more like a traditional IRA in terms of how withdrawals are taxed.
There is an important nuance here. If you have receipts for past medical expenses that you paid out of pocket, you can reimburse yourself from your HSA years later. There is no time limit on when you can reimburse yourself for a qualified expense, as long as you can document it. Some people save receipts for decades and use them to make tax-free withdrawals in retirement.
Can You Invest Your HSA Balance?
Many HSA providers let you invest your balance once it reaches a certain threshold, similar to how a 401(k) or IRA works. You might be able to put the money into mutual funds, ETFs, or other investment options.
Not all HSA providers offer investment options. Some function more like a basic savings account with a low interest rate. If investing is important to you, comparing providers before you open an account matters.
Investment gains inside an HSA are not taxed, which is part of what makes the account attractive for long-term growth. But investing always carries risk. An HSA balance that is invested can lose value, and you could end up with less money than you put in. For people who plan to use their HSA for near-term medical bills, keeping enough in cash to cover those costs is a practical consideration.
HSA vs FSA vs HRA: What Is The Difference?
These three accounts are often confused because they all help pay for medical costs with pre-tax money. But they work quite differently.
| Feature | HSA | FSA | HRA |
|---|---|---|---|
| Who owns the account | You | Your employer | Your employer |
| Rolls over year to year | Yes, fully | Usually no, or limited | Depends on plan |
| Requires high-deductible plan | Yes | No | No |
| Portable if you change jobs | Yes | No | No |
| Investment options | Often available | No | No |
The FSA is use-it-or-lose-it in most cases, though some plans allow a small carryover or a grace period. The HRA is funded entirely by the employer and cannot be taken with you if you leave. The HSA is the only one of the three that is truly yours and stays with you permanently.
What Should You Know Before Opening An HSA?
An HSA can be a powerful tool, but it only makes sense if you are enrolled in a qualifying high-deductible health plan. If you are not, you cannot open one.
If you are in a high-deductible plan, the main trade-off is between lower monthly premiums and higher out-of-pocket costs when you need care. The HSA is designed to help you cover those higher costs with pre-tax money. Whether that trade-off works in your favor depends on your health, your expected medical spending, and how much you can afford to set aside.
One practical point: you do not have to spend your HSA money in the year you contribute it. You can let it build up to cover future medical costs, including costs in retirement. Some financial planners view an HSA as a supplemental retirement account for medical expenses, since health care costs tend to rise with age.
If you are considering an HSA, check whether your health plan meets the IRS requirements, compare HSA providers if you are opening one on your own, and understand the current year’s contribution limits. Those three steps will tell you most of what you need to know.
Frequently Asked Questions
Can you have an HSA without a high-deductible health plan?
No. You must be enrolled in a qualifying high-deductible health plan to open and contribute to an HSA. Having the plan alone does not create the account, but you cannot open one without it.
What happens to your HSA if you change jobs?
The account stays yours and the balance rolls over. You can still use the money for qualified medical expenses, but you cannot contribute new funds unless you enroll in another qualifying high-deductible plan.
Can you use HSA money for dental or vision expenses?
Yes. Dental care and vision care, including exams, glasses, and contact lenses, are generally qualified medical expenses. Over-the-counter items may require a prescription to qualify, so check the current IRS rules.
Is an HSA better than an FSA?
They serve different purposes. An HSA requires a high-deductible plan but rolls over fully and stays with you, while an FSA does not require a high-deductible plan but is typically use-it-or-lose-it. Which is better depends on your health plan and spending needs.
