The basic idea: your own money, your own rules

A Health Savings Account (HSA) is a savings account that belongs to you, not your employer or insurance company. You put money into it before taxes are taken out of your paycheck, and you can spend that money on medical costs whenever you need to. The account stays yours even if you change jobs or retire — unlike a flexible spending account (FSA), which you lose if you don't use it by the end of the year.

The money in an HSA earns interest or investment returns, just like a regular savings account or brokerage account. You decide how much to contribute each year (within legal limits), and you decide when and how to spend it. There's no important date to use the money, and no "use it or lose it" rule.

Key Takeaways

  • An HSA is a personal savings account you control, funded with pre-tax money from your paycheck, and it stays yours for life.
  • You can only open an HSA if you're enrolled in a high-deductible health plan (HDHP), but once open, the account is separate from your insurance.
  • Money you contribute reduces your taxable income, and money you withdraw for may have access to medical expenses is never taxed.
  • After age 65, you can withdraw money for any reason without penalty, though non-medical withdrawals are taxed as income.
  • You choose how to invest the money in your account — some people keep it in cash, others buy mutual funds or stocks.

Who can open an HSA and when

You can only open an HSA if you're enrolled in a high-deductible health plan (HDHP) — a type of insurance that has a higher deductible (the amount you pay before insurance kicks in) but lower monthly premiums. Your employer may offer an HDHP as one of their health insurance choices, or you can buy one on your own through the health insurance marketplace in your state.

The IRS sets minimum deductibles each year for what counts as an HDHP. For 2024, that's $1,600 for individual coverage or $3,200 for family coverage, though many plans have higher deductibles. You can't have other health insurance at the same time (with a few exceptions for specific types of coverage like dental or vision).

Once you enroll in an HDHP, you can open an HSA through your employer (if they offer one) or through a bank or financial institution on your own. You don't have to open one when ready — you can open it anytime during the year you're covered by an HDHP.

How money goes in: contributions and limits

You contribute to your HSA through payroll deductions, which means the money comes out of your paycheck before federal income tax is calculated. This is the main tax advantage: if you earn $50,000 and contribute $3,000 to your HSA, you only pay income tax on $47,000.

The IRS sets a yearly limit on how much you can contribute. For 2024, the limit is $4,150 for individual coverage or $8,300 for family coverage. These limits change each year, and your employer or HSA provider will tell you the current limit when you enroll. If you're 55 or older, you can contribute an extra $1,000 per year.

You can also contribute money to your HSA after taxes (from your bank account) if you want to save more, though you won't get the tax deduction for that portion. Some people do this to build up savings for future medical costs.

How money comes out: what you can spend it on

You can withdraw money from your HSA to pay for may have access to medical expenses — a specific list set by the IRS. These include doctor visits, prescriptions, dental work, vision care, mental health treatment, and hospital stays. They also include medical equipment like wheelchairs, hearing aids, and blood pressure monitors. You can find the full list on the IRS website, but the basic rule is: if it's a medical or dental cost that your health insurance doesn't cover, your HSA can probably pay for it.

You can also use HSA money to pay your health insurance premiums in certain situations: if you're receiving unemployment benefits, if you're retired and over 65, or if you're paying for COBRA coverage (temporary insurance after you leave a job). You cannot use HSA money to pay premiums for regular health insurance while you're working, with the exception of long-term care insurance.

When you withdraw money for a may have access to expense, that withdrawal is not taxed. You keep receipts as proof, though you don't usually have to send them to the IRS unless you're audited.

How your HSA grows: investment options

The money in your HSA doesn't just sit in a checking account. Depending on your provider, you can keep it in a savings account (earning a small amount of interest), or you can invest it in mutual funds, stocks, or bonds. Some HSA providers automatically move money above a certain balance into investments; others let you choose.

This is different from a regular savings account because you're building wealth over time. If you're young and healthy and don't expect to use much of your HSA money soon, you could invest it for growth. If you're older or expect medical costs, you might keep it in cash where it's safe and accessible.

The earnings on your HSA investments are never taxed, as long as you eventually spend the money on may have access to medical expenses. This makes an HSA a powerful long-term savings tool — some people use it as a retirement account for medical costs.

What happens after age 65

At 65, your HSA rules change. You can still withdraw money for may have access to medical expenses tax-free, just as before. But now you can also withdraw money for any reason without penalty — you'll just pay income tax on the non-medical withdrawal, the same way you would with a traditional retirement account.

Many people use this feature to treat their HSA as a second retirement account. If you've been saving in your HSA for decades and haven't spent it on medical costs, you can start withdrawing it for living expenses at 65 without the 20% penalty that would explore if you did that at age 50.

Common mistakes and how to avoid them

The biggest mistake is losing track of receipts. The IRS doesn't require you to submit receipts when you withdraw money, but you need to keep them for your own records in case of an audit. If you can't prove a withdrawal was for a may have access to expense, the IRS can tax it and charge a penalty.

Another common mistake is withdrawing money for non-medical expenses before age 65. If you do this, you pay income tax on the withdrawal plus a 20% penalty. For example, if you withdraw $1,000 for a vacation, you'd owe income tax on that $1,000 plus $200 in penalties.

A third mistake is not maximizing contributions. Many people don't contribute the full amount allowed, which means they're missing out on tax savings. If your employer offers an HSA match (some do, like a 401(k) match), you're also leaving information programs on the table.

Frequently Asked Questions

Can I use my HSA debit card to buy anything, or only medical things?

Most HSA providers give you a debit card that's supposed to work only for may have access to medical expenses. In practice, the card often works at any store, but you're responsible for keeping track of what you buy. If you use it for non-medical purchases, you owe taxes and penalties on those amounts. It's safer to pay out of pocket and then reimburse yourself from your HSA, keeping the receipt as proof.

What happens to my HSA if I leave my job?

Your HSA stays with you. It doesn't belong to your employer — you own it. You can keep the account open, continue to invest the money, and withdraw it for medical expenses anytime. If your new job offers an HSA, you can keep both accounts or roll the old one into the new one. The account is yours for life.

Can I contribute to an HSA and a 401(k) at the same time?

Yes. An HSA is separate from retirement accounts like a 401(k) or IRA. You can contribute to all three in the same year, as long as you stay within the yearly limits for each. Many financial advisors suggest maxing out your HSA first because of the triple tax advantage: contributions are tax-deductible, growth is tax-free, and withdrawals for medical expenses are tax-free.

What if I don't use all my HSA money in a year?

The money rolls over to the next year. There's no important date to spend it, and no "use it or lose it" rule like with FSAs. You can let it grow for decades and spend it whenever you need to. This is why an HSA can become a powerful long-term savings tool.

Can I reimburse myself for medical expenses from years ago?

Yes, as long as you have a receipt and the expense happened after you opened your HSA. You could have a medical bill from 2020, keep the receipt, and reimburse yourself in 2024 if you want to. Many people do this strategically — they pay medical costs out of pocket, keep the receipts, and reimburse themselves from their HSA later when they need the money for something else.