The basic flow: money in, money out, money that stays

A Health Savings Account (HSA) is a bank account you own that holds money specifically for medical expenses. You put pre-tax dollars into it, spend those dollars on may have access to medical costs, and any money left over stays in the account and grows year to year. Unlike a flexible spending account (FSA), which forces you to use the money or lose it each year, an HSA is yours to keep.

The account only works if you're enrolled in a high-deductible health plan (HDHP)—a type of health insurance with lower monthly premiums but a higher deductible. Once you have an HDHP, you can open an HSA through a bank, credit union, or insurance company. You decide how much to contribute each year (up to a limit set by the IRS, which changes annually). Your employer may contribute too, and that money counts toward your limit.

When you need medical care, you pay out of pocket first. Then you can withdraw from your HSA to cover that cost. The withdrawal is tax-free as long as you spent the money on a may have access to medical expense. If you spend the money on something that isn't may have access to—say, vitamins or gym memberships—you owe income tax on that withdrawal plus a 20% penalty.

Key Takeaways

  • You must be enrolled in a high-deductible health plan to open or contribute to an HSA; without one, the account closes and you can only withdraw for medical expenses.
  • Money you contribute reduces your taxable income for the year, and withdrawals for may have access to medical expenses are tax-free.
  • Unlike FSAs, HSA money rolls over year to year and never expires, so you can save for future medical costs.
  • You can withdraw money for may have access to expenses anytime, but non-may have access to withdrawals trigger income tax plus a 20% penalty before age 65.
  • After age 65, you can withdraw HSA money for any reason without penalty, though non-medical withdrawals are taxed as regular income.

Who can open an HSA and when

You must be covered by an HDHP to open an HSA. The IRS defines an HDHP by its deductible amount—the threshold varies by year and by whether you have individual or family coverage. You also cannot be claimed as a dependent on someone else's tax return, and you cannot be enrolled in Medicare.

You can open an HSA at any time during the year, but contributions for a given tax year must be made by the tax filing deadline (usually April 15 of the following year). If you enroll in an HDHP mid-year, you can still open an HSA and contribute a prorated amount based on the months you were covered. Some employers offer HSAs through payroll deduction, which is the simplest route because the money comes out before taxes are calculated.

If you leave your HDHP or lose coverage, you can no longer contribute to the HSA, but you keep the account and the money in it. You can still withdraw for may have access to medical expenses. If you switch to a non-HDHP plan (like a traditional PPO), your HSA freezes—no new contributions, but the balance stays yours.

What counts as a may have access to medical expense

may have access to expenses include doctor visits, hospital stays, prescription medications, dental work, vision care, mental health treatment, and medical equipment like wheelchairs or hearing aids. Copays, coinsurance, and deductibles all count. Over-the-counter medications count only if you have a prescription for them (or, as of 2020, insulin without a prescription). Physical therapy, acupuncture, and chiropractic care are covered if a doctor orders them.

Things that do not count: cosmetic surgery, gym memberships, vitamins (unless prescribed), most over-the-counter pain relievers or cold medicine, toothpaste, or sunscreen. Long-term care insurance premiums are covered up to a limit. Health insurance premiums themselves are not covered, except for COBRA continuation coverage, Medicare premiums (after age 65), or long-term care insurance.

The IRS publishes a full list, and it changes occasionally. When you withdraw, keep receipts and documentation showing the expense was medical and the date it occurred. You do not have to submit receipts to the HSA provider, but you must keep them in case of an audit.

How contributions and tax deductions work

Money you contribute to an HSA reduces your taxable income for that year. If you contribute $3,000 and earn $50,000, you only pay income tax on $47,000. This works whether you contribute through payroll deduction or deposit the money yourself. The tax savings depend on your tax bracket—the higher your bracket, the more you save.

The IRS sets annual contribution limits, which vary by coverage type (individual, family, or other). These limits change each year. If you contribute more than the limit, you owe income tax on the excess plus a 6% penalty. If your employer contributes and you also contribute, the total of both cannot exceed the limit.

If you turn 55 before the end of the year, you can contribute an extra amount called a "catch-up" contribution. This is separate from the main limit and phases out once you enroll in Medicare.

Withdrawals, timing, and proof

You can withdraw money from your HSA anytime for a may have access to medical expense. There is no waiting period. You do not need to submit a receipt to the HSA provider before you withdraw—you can withdraw first and keep the receipt for your records. However, the IRS can audit you years later and ask for proof that the expense was may have access to and that you paid it.

If you cannot produce documentation, the IRS treats the withdrawal as non-may have access to. You owe income tax on the amount plus a 20% penalty. This penalty applies only before age 65. After 65, you can withdraw HSA money for any reason without the penalty, though non-medical withdrawals are taxed as regular income.

Some HSA providers offer debit cards linked to the account, which lets you pay directly at the pharmacy or doctor's office. Others require you to withdraw the money and pay out of pocket, then reimburse yourself from the HSA. Both methods are valid. If you use a debit card, the provider may ask you to submit a receipt later to confirm the expense was may have access to.

Investment and growth of HSA funds

HSA money can sit in a cash account earning minimal interest, or you can invest it in mutual funds, stocks, or bonds through the HSA provider. The investment earnings are tax-free as long as you eventually use the money for may have access to medical expenses. If you withdraw invested money for a non-may have access to expense, you owe tax on the earnings plus the 20% penalty.

Not all HSA providers offer investment options. Some are basic savings accounts only. If you want to invest, you need to open an HSA with a provider that offers it—typically a bank or brokerage, not an insurance company. You can also roll your HSA balance to a different provider if your current one does not offer the investment options you want.

Because HSA money rolls over indefinitely, some people use it as a long-term savings vehicle for retirement medical expenses. You can accumulate decades of contributions and let them grow. After age 65, you can withdraw the money for any reason, so it functions like a supplemental retirement account.

What happens if you lose HDHP coverage

If you switch to a non-HDHP plan or lose health insurance, you can no longer contribute to your HSA. The account does not close, and the money stays there. You can still withdraw for may have access to medical expenses at any time, tax-free. You cannot make new contributions until you re-enroll in an HDHP.

If you enroll in Medicare, your HSA closes to new contributions. You can continue to withdraw for may have access to expenses, including Medicare premiums and out-of-pocket costs. Once you turn 65 and are on Medicare, you can withdraw HSA money for any reason without the 20% penalty, though non-medical withdrawals are taxed as income.

If you leave your job, you keep the HSA. It is your account, not your employer's. You can continue to use it, invest it, and withdraw from it regardless of where you work next. Some employers offer HSAs through a third-party administrator; when you leave, the administrator will tell you how to access your account independently.

Common mistakes and how to avoid them

The biggest mistake is withdrawing for a non-may have access to expense and not keeping the receipt. Years later, an audit can trigger the 20% penalty. Keep all medical receipts and documentation for at least three years, ideally longer. If you use an HSA debit card, reconcile it monthly to catch any fraudulent charges or provider errors.

Another mistake is over-contributing. If you contribute more than the annual limit, you owe a 6% penalty on the excess for each year it sits in the account. If your employer contributes and you also contribute, track both to stay under the limit. Some payroll systems will catch this automatically, but not all.

A third mistake is assuming your HSA provider will reject a non-may have access to withdrawal. Most do not. The provider processes the withdrawal, and it is your responsibility to track whether it was may have access to. The IRS may audit you years later. Keep a personal log of what you withdrew and what it was for.

Frequently Asked Questions

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

Yes. HSA money can be used for may have access to medical expenses of you, your spouse, or your dependents, regardless of whether they are covered by your health plan. You do not need to be on the same insurance policy. Keep receipts showing the expense and who it was for.

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 as an HSA and withdraw tax-free for their own may have access to expenses. If a non-spouse inherits it, the account is treated as taxable income to them, though they can still withdraw for the deceased person's unpaid medical bills tax-free.

Can I withdraw HSA money to pay off medical debt from years ago?

Yes, as long as the debt is for a may have access to medical expense and you did not already deduct it on your taxes. You can withdraw to cover old bills, but you need documentation showing the expense was incurred and what it was for. The year the expense occurred does not matter, only that it was may have access to.

Do I have to use my HSA before my regular health insurance deductible?

No. You can use your HSA and your insurance in any order. Some people use insurance first to hit their deductible, then use HSA money for costs above the deductible. Others use HSA money first to preserve it for future years. The choice is yours, and there is no tax penalty either way.

Can I roll over my HSA to an IRA or other retirement account?

No. HSA money cannot be transferred to an IRA, 401(k), or other retirement account. However, after age 65, you can withdraw HSA money for any reason without the 20% penalty, so it functions like a supplemental retirement account. You can also leave it invested and let it grow for future medical expenses in retirement.