How an HSA account actually works

An HSA is a bank account you own that holds money specifically for medical expenses. You put money in (usually through payroll deductions), the money sits there earning interest, and you withdraw it to pay for may have access to medical costs. Unlike a flexible spending account (FSA), the money does not disappear at the end of the year — it rolls over and stays yours indefinitely, even if you change jobs or retire.

The account itself is held at a bank or financial institution, the same way a savings account is. You get a debit card, checkbook, or online access to move money out. The key difference from a regular savings account is that the money going in is not taxed, and the money coming out for medical expenses is not taxed either. That tax break is the entire point of the account.

To open an HSA, you must be enrolled in a high-deductible health plan (HDHP) — a specific type of health insurance with a lower monthly premium and a higher deductible. You cannot have an HSA if you are on Medicare, covered by another person's health plan, or enrolled in a traditional health plan with a lower deductible. The HDHP requirement is strict and non-negotiable.

Key Takeaways

  • An HSA is your own bank account that holds pre-tax money for medical expenses, and the balance rolls over year to year instead of disappearing.
  • You can only open an HSA if you are enrolled in a high-deductible health plan (HDHP), and you lose HSA may be able to access the moment you switch to a different type of insurance.
  • Contributions come from your paycheck (if your employer offers it) or directly from you, and the IRS sets annual limits that change each year.
  • Withdrawals for may have access to medical expenses are tax-free, but withdrawals for non-medical expenses are taxed as income plus hit with a 20 percent penalty before age 65.
  • After age 65, you can withdraw money for any reason without the penalty, though non-medical withdrawals are still taxed as regular income.

How money gets into your HSA

If your employer offers an HSA, the easiest route is payroll deduction. You authorize a portion of your paycheck to go into the account before taxes are calculated, which lowers your taxable income for the year. Your employer may also contribute money directly to your account — this is a common benefit and the money is yours to keep even if you leave the job.

If your employer does not offer an HSA or you are self-employed, you can open one on your own at a bank or financial institution and contribute directly. You make the contribution yourself, and at tax time you deduct it on your tax return (Form 1040, Schedule 1). The deduction works the same way: the money reduces your taxable income for that year.

The IRS sets annual contribution limits, and they change each year. For 2024, the limit is $4,150 for individual coverage and $8,300 for family coverage. If you are 55 or older, you can contribute an additional $1,000 per year (called a catch-up contribution). You cannot contribute more than the limit, and if you do, the excess is taxed and penalized.

Contributions must be made by the tax filing deadline (usually April 15) to count toward that tax year. If you enroll in an HDHP mid-year, you can still contribute a full year's worth of money, but only if you remain enrolled through December 31 of that year — if you switch insurance plans before year-end, the excess contribution is taxed and penalized.

What you can spend HSA money on

may have access to medical expenses include doctor visits, prescription drugs, dental work, vision care, mental health treatment, and hospital stays. They also include medical equipment (crutches, wheelchairs, hearing aids), over-the-counter medications (if you have a prescription from your doctor), and certain medical supplies. The IRS publishes a full list, but the basic rule is: if it treats, prevents, or diagnoses a medical condition, it probably qualifies.

Expenses do not have to be for you alone. You can use HSA money for your spouse and any dependent children, even if they are not on your health plan. You can also pay for expenses that your health insurance does not cover — copays, deductibles, coinsurance, and out-of-network costs all count.

Things that do not may have access to include cosmetic procedures (unless they treat an injury or disease), gym memberships, vitamins without a medical condition, and most over-the-counter items without a prescription. Long-term care insurance premiums and certain health insurance premiums (like COBRA or Medicare premiums after age 65) do may have access to, but regular health insurance premiums do not.

You do not have to spend the money in the year you contribute it. The balance rolls over, and you can spend it years later. Some people use an HSA as a retirement savings tool, contributing the maximum each year and paying medical expenses out of pocket, letting the account grow tax-free.

How withdrawals work and what happens if you spend it wrong

To withdraw money, you use the debit card, write a check, or transfer funds online — the same way you would with any bank account. There is no approval process or paperwork required at the time of withdrawal. You simply take the money out and use it for the expense.

The IRS does not require you to submit receipts when you withdraw, but you should keep them. If the IRS audits you, they will ask for proof that the money was spent on may have access to expenses. If you cannot prove it, the withdrawal is treated as non-may have access to spending, which means you owe income tax on the amount plus a 20 percent penalty.

A non-may have access to withdrawal before age 65 costs you twice: you pay regular income tax on the amount (as if it were a paycheck) plus a 20 percent penalty on top. For example, if you withdraw $1,000 for a non-may have access to expense and you are in the 22 percent tax bracket, you owe $220 in income tax plus $200 in penalty — a total of $420. After age 65, the 20 percent penalty goes away, but you still owe income tax on non-may have access to withdrawals.

If you withdraw money for a may have access to expense but do not have proof, you have a grace period to gather documentation. Keep receipts for at least three years after the withdrawal, because that is how far back the IRS can audit.

What happens to your HSA when you change jobs or insurance

Your HSA stays with you. The account is yours, not your employer's, so when you leave a job, the money remains in the account. You can keep it at the same bank, move it to a new bank, or roll it into an HSA at your new employer's plan — the choice is yours. There is no time limit to move the money, and no tax consequence for doing so.

If you switch to a health plan that is not an HDHP (such as a traditional PPO or HMO with a lower deductible), you lose HSA may be able to access immediately. You can no longer contribute new money, but the money already in the account stays there and you can still withdraw it for may have access to medical expenses. Once you re-enroll in an HDHP, you can start contributing again.

If you enroll in Medicare, your HSA may be able to access ends. You can still withdraw money from the account for may have access to medical expenses, including Medicare premiums and out-of-pocket costs, but you cannot contribute new money. Many people use their HSA to pay Medicare premiums and medical expenses in retirement, which is one reason some treat it as a long-term savings tool.

HSA interest and investment options

Most HSAs earn interest on the balance, similar to a savings account. The interest rate varies by bank and changes over time. Some HSAs also allow you to invest the money in stocks, bonds, or mutual funds, similar to a 401(k). If you invest, the growth is tax-free as long as you withdraw it for may have access to medical expenses.

Investment options depend on which bank or financial institution holds your account. Some offer only savings accounts with interest; others offer a full range of investments. If you plan to use the HSA as a long-term savings tool, look for an account that offers investment options, because interest alone will not grow the money much over decades.

If you invest HSA money and the investment loses value, you cannot deduct the loss on your taxes. You can only deduct contributions and gains (if withdrawn for may have access to expenses). This is different from a regular investment account, where losses can offset other gains.

Frequently Asked Questions

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

Yes. You can use HSA money for your spouse and any dependent children, even if they are not on your health plan. The expenses must still be may have access to medical expenses — doctor visits, prescriptions, dental work, and so on. Keep receipts in case the IRS asks for proof.

What happens to my HSA if I die?

The account becomes part of your estate. If your spouse is the beneficiary, they can continue to use it for their own may have access to medical expenses tax-free. If a non-spouse inherits it, they owe income tax on the full balance, but not the 20 percent penalty. The rules are complex, so discuss this with the bank holding your account.

Can I withdraw HSA money to pay my health insurance deductible?

Yes. Deductibles are may have access to medical expenses, so you can use HSA money to pay them. You can also use it for copays, coinsurance, and out-of-network costs. The only health insurance cost you cannot pay with HSA money is the regular monthly premium (unless it is COBRA, Medicare, or long-term care insurance).

What if I contribute too much to my HSA by accident?

The excess contribution is taxed as income and hit with a 6 percent penalty each year it sits in the account. You can withdraw the excess and the earnings on it before the tax filing deadline to avoid the penalty. Contact your HSA provider immediately if you over-contribute.

Can I use my HSA debit card at any store?

The debit card is designed for medical expenses, but it does not always block non-medical purchases at the point of sale. If you use it for non-may have access to expenses, you are responsible for tracking that and reporting it correctly at tax time. Some HSA providers monitor card use and flag suspicious transactions, but not all do.