A Health Savings Account is a tax-advantaged container for medical money

A Health Savings Account (HSA) is a bank account you own that holds money specifically for medical expenses. You put pre-tax dollars in, the money grows tax-free, and you withdraw it tax-free when you pay for may have access to medical costs. Unlike a flexible spending account (FSA), which you must spend down each year or lose the money, an HSA rolls over indefinitely—money you don't use stays in the account and grows.

To open an HSA, you must be enrolled in a high-deductible health plan (HDHP) through your employer, the individual market, or Medicare. The account itself is separate from your insurance; your bank or a third-party administrator holds it. You control the money, not your employer or insurer. If you leave your job, the account goes with you.

The three-part tax advantage is what makes HSAs different from a regular savings account. Contributions reduce your taxable income (whether your employer contributes or you do). The money inside earns interest or investment returns tax-free. And withdrawals for may have access to medical expenses are never taxed. This stacking of tax benefits is why HSAs are sometimes called "triple tax-advantaged."

Key Takeaways

  • You must be enrolled in a high-deductible health plan to open or contribute to an HSA, and the account is yours to keep even if you change jobs.
  • Money you contribute reduces your taxable income, grows tax-free inside the account, and comes out tax-free when spent on medical expenses.
  • Unlike an FSA, HSA money rolls over year to year with no "use it or lose it" deadline, so you can build a long-term medical fund.
  • You can invest HSA funds in stocks, bonds, or mutual funds once the balance reaches a certain threshold, typically $1,000 to $2,500 depending on your provider.
  • Withdrawals for non-medical expenses are taxed as income plus a 20 percent penalty before age 65, but after 65 the penalty disappears and it becomes like a regular retirement account.

How money flows in and out of your HSA

You can fund an HSA in three ways: through payroll deduction from your employer, by contributing directly yourself, or through both. If your employer offers an HSA, they typically set up the account and may contribute money on your behalf—this is assistance programs and counts toward your annual contribution limit. You can also add your own money by writing a check, setting up a bank transfer, or mailing a check to the account administrator.

The IRS sets annual contribution limits, which change yearly. For 2024, the limit is $4,150 for individual coverage and $8,300 for family coverage. If you are 55 or older, you can add an extra $1,000 per year ("catch-up" contributions). You can contribute until April 15 of the following year for the prior tax year, just like an IRA.

When you spend money on a may have access to medical expense—copays, deductibles, prescriptions, dental work, vision care, mental health treatment—you can withdraw from your HSA to pay for it. You don't have to submit receipts to the account administrator unless you are audited by the IRS. Some HSA providers give you a debit card linked to the account; others require you to pay out of pocket and then request a reimbursement.

What counts as a may have access to medical expense

may have access to expenses are broad and include most things your health insurance would cover: doctor visits, hospital stays, surgery, prescription drugs, dental and orthodontic care, vision exams and glasses, hearing aids, mental health counseling, and physical therapy. Over-the-counter medications like pain relievers and allergy medicine count only if you have a prescription from a doctor. Insulin does not require a prescription.

Some expenses do not may have access to. Cosmetic surgery, gym memberships, vitamins (unless prescribed for a specific condition), and most over-the-counter items without a prescription are not covered. Long-term care insurance premiums and certain health insurance premiums can may have access to under specific rules. The IRS publishes a full list, and your HSA provider's website usually has a searchable database of common expenses.

You can withdraw money for your spouse's or dependent's medical expenses even if they are not on your health plan. You do not have to use the money in the same year you contribute it—this is the major advantage over an FSA. You can let it sit for years, building a medical fund for retirement.

How HSA investments work and when they grow

Most HSA providers let you invest the money once your balance reaches a threshold, usually $1,000 to $2,500. You can choose from mutual funds, stocks, bonds, or target-date funds, similar to a 401(k) or IRA. The investment options vary by provider—some offer dozens of choices, others only a handful. Your employer's HSA plan documents will list what is available.

Money you invest grows tax-free, and you pay no capital gains tax when you sell. This makes an HSA a powerful long-term retirement savings tool if you do not need the money for medical expenses now. Some people use their HSA as a secondary retirement account, keeping receipts for medical expenses and reimbursing themselves years later, allowing the account to compound untouched.

If you withdraw money for non-medical expenses before age 65, you owe income tax on the earnings plus a 20 percent penalty. After age 65, the penalty disappears—you can withdraw for any reason and pay only income tax on the earnings, just like a traditional IRA. This makes the HSA a de facto retirement account after 65, though it still offers the tax advantage for actual medical expenses.

What happens to your HSA when you change jobs or retire

Your HSA is yours alone. If you leave your job, the account stays with you and the money remains available. You can keep the same HSA with the same provider, or you can roll it to a new HSA at a different bank or administrator. Some employers require you to move the account if you leave; others let you keep it where it is. Check your plan documents or call your HSA provider to confirm.

If your new job offers an HSA, you can have both accounts open at the same time, but your total contributions across all accounts cannot exceed the annual IRS limit. If your new job does not offer an HSA or you move to a non-HDHP plan, you can no longer contribute to the account, but the money already there stays put and you can still withdraw it for medical expenses.

When you turn 65, you become may be able to access for Medicare. You can no longer contribute to an HSA once you are enrolled in Medicare Part A, but you can continue to withdraw money for medical expenses tax-free. After 65, non-medical withdrawals are taxed as income but the 20 percent penalty no longer applies.

HSA versus FSA: why the differences matter

An FSA is a "use it or lose it" account—money you do not spend by the end of the year (or during a grace period, if your plan offers one) is forfeited. An HSA has no deadline; unused money rolls over forever. This makes an HSA far more flexible if you are unsure how much you will spend on medical care in a given year.

An FSA is usually run by your employer and ends when you leave the job. An HSA is your personal account that travels with you. An FSA typically does not allow investments; an HSA does once you reach the minimum balance. An FSA contribution limit is usually lower—around $3,200 per year—while an HSA limit is higher and indexed to inflation.

You can have both an FSA and an HSA at the same time, but there are strict rules. If you have an FSA, you can only contribute to an HSA if the FSA is a limited-purpose FSA (covering only dental, vision, and hearing) or a post-deductible FSA (which does not pay anything until you meet your deductible). Ask your employer's benefits administrator whether your FSA qualifies.

Common mistakes and how to avoid them

One frequent error is withdrawing money for non-may have access to expenses and not realizing the tax and penalty hit. Before you withdraw, verify the expense is on the IRS list. If you are unsure, ask your HSA provider or check IRS Publication 969.

Another mistake is losing track of receipts. You do not have to submit them when you withdraw, but the IRS can ask for proof during an audit. Keep receipts for at least three to seven years. Some people photograph receipts or save them digitally to avoid paper clutter.

A third error is forgetting that you must be enrolled in an HDHP to contribute. If you switch to a standard health plan mid-year, you can no longer contribute for that year, even if you were enrolled in an HDHP at the start. Your employer's benefits team can tell you the exact date your coverage changes.

Finally, some people do not take advantage of the investment option and leave their HSA in cash, missing years of potential growth. If you have a large balance and do not expect to use it soon, consider moving at least part of it into a low-cost index fund.

Frequently Asked Questions

Can I use my HSA to pay for my spouse's medical expenses?

Yes. You can withdraw HSA funds for your spouse's or dependent's may have access to medical expenses even if they are not on your health plan. You do not need to be married or have them listed as a dependent on your taxes—the IRS definition of dependent is what matters. Keep receipts in case of an audit.

What happens to my HSA if I do not use the money?

The money stays in the account indefinitely and rolls over year to year. You can let it grow through investments and use it later in life for medical expenses or retirement. After age 65, you can withdraw it for any reason, though non-medical withdrawals are taxed as income.

Can I withdraw money from my HSA to pay my health insurance premium?

Only in specific cases. You can pay COBRA premiums, Medicare premiums (Part B, Part D, and supplemental), and long-term care insurance premiums with HSA funds. You cannot use it for your regular employer health plan premium, even if you are paying your share through payroll deduction.

What if I accidentally contribute too much to my HSA?

Contact your HSA provider immediately and request a corrective distribution of the excess plus earnings. You must withdraw the excess by April 15 of the following year to avoid a 6 percent excise tax on the overage. Your provider can help you file the necessary forms with the IRS.

Do I have to use my HSA debit card, or can I pay out of pocket and reimburse myself?

Either method works. Some people prefer to pay medical expenses out of pocket and reimburse themselves from the HSA later, allowing the account to grow longer. Others use the debit card for convenience. Both are valid; just keep receipts for tax purposes.