What a Health Savings Account Actually Is

A Health Savings Account (HSA) is a tax-advantaged savings account tied to a high-deductible health insurance plan. You put pre-tax money into it, use that money to pay medical expenses, and the account grows tax-free. Unlike a flexible spending account (FSA), money you don't spend in a given year stays in the account and rolls over—you don't lose it.

The account belongs to you, not your employer. If you change jobs or leave your employer, the account goes with you. You control how much to contribute each year (within IRS limits), what you spend it on, and when you spend it.

HSAs are only available to people enrolled in a high-deductible health plan (HDHP). That means your plan's deductible is higher than a standard plan—in 2024, at least $1,600 for individual coverage or $3,200 for family coverage. The tradeoff is that your monthly premiums are usually lower.

Key Takeaways

  • You contribute pre-tax dollars to an HSA, which means the money reduces your taxable income for the year.
  • You can spend HSA money on a wide range of medical, dental, and vision expenses, and the IRS publishes a full list of what counts.
  • Money left unspent in your HSA rolls over year to year and can be invested to grow, unlike FSA funds which you typically lose if unused.
  • Once you turn 65, you can withdraw HSA money for any reason without penalty, though non-medical withdrawals are taxed as income.
  • You must be enrolled in a high-deductible health plan to open or contribute to an HSA; losing that coverage ends your ability to add new money.

How Much You Can Contribute and Who Can Open One

The IRS sets annual contribution limits, which change each year. For 2024, you can contribute up to $4,150 if you have individual coverage, or $8,300 if you have family coverage. If you're 55 or older, you can add an extra $1,000 per year (called a catch-up contribution).

You can only open an HSA if you're enrolled in a high-deductible health plan. You cannot have other health coverage at the same time—no spouse's plan, no Medicare, no Medicaid, no VA benefits. You also cannot be claimed as a dependent on someone else's tax return.

Your employer may offer an HSA and contribute money on your behalf, but you don't have to use your employer's plan. You can open an HSA through a bank, credit union, or investment firm on your own. If you do, you'll need to set up the account before the tax important date (usually April 15) to count contributions toward that tax year.

What Medical Expenses You Can Pay From Your HSA

The IRS maintains a detailed list of what counts as a may have access to medical expense. The broad categories include doctor visits, hospital stays, prescription medications, dental work, vision care, and mental health treatment. You can also pay for medical equipment like crutches, wheelchairs, or blood pressure monitors.

Some expenses that surprise people: you can pay for over-the-counter medications (including pain relievers, allergy medicine, and cold remedies) if you have a prescription or doctor's note. You can pay for therapy, acupuncture, and chiropractic care. You can pay for hearing aids and glasses. You can pay your health insurance premiums if you're unemployed, on COBRA, or receiving workers' compensation.

Things you cannot pay for: cosmetic surgery (unless it's reconstructive after an injury), gym memberships, vitamins without a medical condition diagnosis, and most over-the-counter items without a prescription. If you're unsure whether an expense qualifies, the IRS website has a searchable database, or you can ask your HSA provider.

How to Use Your HSA Money

Most HSAs come with a debit card you can use at the pharmacy, doctor's office, or hospital. Some accounts let you pay by check or electronic transfer. You can also pay out of pocket and then reimburse yourself from the account later—even years later, as long as you keep receipts.

You don't have to spend the money in the year you contribute it. Unlike an FSA, there's no "use it or lose it" rule. Money rolls over indefinitely, which means you can build a balance over time and use it strategically. Some people use their HSA as a retirement savings tool, letting the money grow invested rather than spending it when ready.

Keep receipts and documentation for every withdrawal. The IRS can audit HSA accounts, and you'll need proof that money was spent on may have access to medical expenses. If you withdraw money for a non-may have access to expense before age 65, you pay income tax on that amount plus a 20% penalty.

How HSA Money Grows and Investment Options

Once your HSA balance reaches a certain threshold (usually $1,000 to $2,500, depending on your provider), you can invest the money in mutual funds, stocks, or bonds. The earnings grow tax-free, and you pay no tax when you withdraw the money for medical expenses.

This is where an HSA becomes a powerful retirement tool. If you don't need the money for medical expenses now, you can let it compound for decades. At 65, you can withdraw money for any reason—not just medical expenses—without the 20% penalty. You'll pay income tax on non-medical withdrawals, but the account itself has grown tax-free.

Not all HSA providers offer investment options. Some only let you keep money in a savings account earning minimal interest. If investing matters to you, compare providers before opening an account. The fees also vary—some charge monthly maintenance fees, transaction fees, or investment management fees.

What Happens to Your HSA If Your Coverage Changes

If you lose your high-deductible health plan coverage—because you change jobs, retire, or switch to a different plan—you can no longer contribute new money to the HSA. The account itself doesn't close, and the money stays there, but you cannot add to it.

If you enroll in Medicare, you must stop contributing to your HSA the month you become may be able to access. You can still withdraw money from the account for may have access to medical expenses, and Medicare premiums count as may have access to expenses.

If you gain other health coverage (like Medicaid or your spouse's plan), you lose HSA may be able to access when ready. You have until the tax important date to withdraw any contributions you made after you lost may be able to access, or you'll face taxes and penalties on that money.

HSA vs. FSA vs. Other Savings Options

An HSA and an FSA both let you set aside pre-tax money for medical expenses, but they work differently. An FSA has a "use it or lose it" rule—money you don't spend by the end of the year is forfeited (though some plans allow a small carryover or grace period). An HSA has no important date; money rolls over forever.

An FSA doesn't require a high-deductible plan, so it's available to more people. But an HSA lets you invest the money and use it as a retirement account, which an FSA does not. If your employer offers both, an HSA is usually the better choice if you can afford to contribute and don't need to spend the money when ready.

A regular savings account or taxable investment account gives you no tax advantage. You pay taxes on the money going in, and you pay taxes on the earnings. An HSA is the only account that offers a triple tax advantage: contributions are tax-deductible, growth is tax-free, and withdrawals for medical expenses are tax-free.

Frequently Asked Questions

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

Yes. You can pay for any family member's may have access to medical expenses from your HSA, even if they're not on your health insurance plan. You don't need to be the one receiving the care—only that the expense is medically necessary and qualifies under IRS rules.

What happens if I withdraw money from my HSA for something that's not a medical expense?

Before age 65, you'll owe income tax on the amount plus a 20% penalty. After 65, you can withdraw money for any reason, but non-medical withdrawals are taxed as regular income (no penalty). Keep receipts so you can prove which withdrawals were for medical expenses if the IRS asks.

Can I open an HSA if my employer doesn't offer one?

Yes. You can open an HSA through a bank, credit union, or investment firm as long as you're enrolled in a high-deductible health plan. You'll contribute your own money instead of having your employer deduct it from your paycheck, but the tax advantages are the same.

Do I have to spend my HSA money by a certain age?

No. There's no age limit on how long you can keep money in an HSA or when you must spend it. At 65, the rules change—you can withdraw for any reason without the 20% penalty—but you're never forced to use the money.

What if I change jobs and my new employer offers a different HSA?

You can roll your old HSA into your new employer's plan, or keep the old account open and manage it separately. You don't have to consolidate. Some people keep multiple HSAs from previous jobs. Just remember that your total contributions across all accounts cannot exceed the annual IRS limit.