The basic mechanics of an HSA

A Health Savings Account is a bank account you control that holds money specifically for medical expenses. You put pre-tax dollars into it, the money grows tax-free, and you withdraw it tax-free when you pay for may have access to medical costs. The account stays open year to year — unlike a Flexible Spending Account, which empties at the end of the year — so unused money accumulates and can be spent years later.

To open an HSA, you must be enrolled in a High Deductible Health Plan (HDHP), which is a health insurance plan with a higher deductible than standard plans. For 2024, the IRS defines an HDHP as a plan with a deductible of at least $1,600 for individual coverage or $3,200 for family coverage. Your employer may offer an HDHP, or you can purchase one through the health insurance marketplace.

Once you have HDHP coverage, you can open an HSA through a bank, credit union, or financial institution that administers them. You do not need to use the same institution as your insurance company. You choose where your account lives and how the money is invested.

Key Takeaways

  • You contribute pre-tax money to an HSA, and withdrawals for may have access to medical expenses are tax-free, creating a double tax advantage that other savings accounts do not offer.
  • An HSA requires enrollment in a High Deductible Health Plan, which means you pay more out of pocket before insurance kicks in, but you get the HSA benefit in return.
  • Money in an HSA rolls over year to year and never expires, so you can save for future medical costs or even retirement healthcare expenses.
  • You can only contribute to an HSA during the months you have HDHP coverage, and contribution limits change yearly based on IRS rules.
  • Withdrawals for non-medical expenses are taxed as income and subject to a penalty, so the account is designed to stay dedicated to healthcare costs.

How money flows in and out

If your employer offers an HSA, you authorize payroll deductions before taxes are calculated. That money goes directly into your HSA account and never appears on your taxable income. If you buy an HDHP on your own, you can contribute directly to an HSA you open yourself, and you deduct the contribution on your tax return.

The IRS sets annual contribution limits. For 2024, you can contribute up to $4,150 for individual coverage or $8,300 for family coverage. If you are 55 or older, you can add an extra $1,000 per year. These limits change annually, and your HSA provider will tell you the current year's cap when you open the account.

You can withdraw money anytime for a may have access to medical expense — doctor visits, prescriptions, dental work, vision care, mental health treatment, and many other healthcare costs all count. Keep your receipts. You do not have to submit them to the HSA provider when you withdraw, but you need them if the IRS ever audits your account to prove the withdrawal was for a medical expense.

If you withdraw money for something that is not a may have access to medical expense, you pay income tax on that amount plus a 20% penalty. After age 65, the penalty goes away, but you still owe income tax on non-medical withdrawals — at that point, an HSA works like a traditional retirement account.

What counts as a may have access to medical expense

The IRS maintains a detailed list, but the practical rule is: if it treats, prevents, or diagnoses a medical condition, it usually counts. Doctor visits, hospital stays, surgery, prescription drugs, and mental health therapy all may have access to. Dental work, vision care including glasses and contacts, and hearing aids may have access to. Over-the-counter medications like pain relievers and allergy medicine count if you have a prescription or doctor's note.

Some expenses do not count. Cosmetic procedures, gym memberships, vitamins without a medical condition diagnosis, and most wellness products are not may have access to expenses. Long-term care insurance premiums count, but regular health insurance premiums do not — with one exception: if you are receiving unemployment benefits, you can use HSA funds to pay health insurance premiums during that time.

The rules are specific enough that it is worth checking the IRS Publication 502 or asking your HSA provider before you withdraw for something unusual. If you are wrong, you owe the penalty.

Investment options and growth

An HSA is not just a savings account — it is an investment account. Most HSA providers let you keep money in a cash account earning interest, or move it into mutual funds, stocks, or other investments. The money grows tax-free regardless of which option you choose.

Some people use an HSA as a retirement savings tool. They contribute the maximum each year, pay medical expenses out of pocket, and let the account grow. Once they turn 65, they can withdraw for any reason without the 20% penalty (though non-medical withdrawals are still taxed as income). This strategy turns an HSA into a supplemental retirement account with a tax advantage that a regular savings account does not have.

Your HSA provider charges fees — some charge monthly maintenance fees, some charge per transaction, some charge investment management fees. Shop around when you open the account, because fees vary widely and can eat into your balance over time.

When you change jobs or insurance

Your HSA belongs to you, not your employer. If you leave your job, the account stays open and the money stays yours. You can keep it with the same provider, move it to a different HSA provider, or leave it invested and untouched for years.

If you lose HDHP coverage, you can no longer contribute to an HSA, but you can still withdraw from the account for medical expenses. If you switch to a different HDHP later, you can resume contributions. The account itself never closes unless you close it.

If you switch to a non-HDHP plan — a standard PPO or HMO — you cannot contribute to an HSA while you have that coverage. You can contribute again if you re-enroll in an HDHP during open enrollment or if you have a may have access to life event like losing coverage.

HSA vs. other healthcare savings options

A Flexible Spending Account (FSA) is similar but different. You contribute pre-tax money and use it for medical expenses, but FSA money does not roll over — you lose what you do not spend by the end of the year (with a small carryover option in some plans). An FSA does not require an HDHP. If you have an FSA through your employer, you cannot also have an HSA.

A Dependent Care FSA covers childcare and elder care expenses, not medical costs, so it serves a different purpose and can exist alongside an HSA.

A regular savings account offers no tax advantage. Money you put in is after-tax, and interest is taxed as income. An HSA gives you a tax break on the way in, on the growth, and on the way out — three tax advantages a regular account does not have.

Common mistakes and how to avoid them

The biggest mistake is treating an HSA like a general savings account. If you withdraw for non-medical expenses, you owe the penalty. Keep careful records of what you spend and why. If you are not sure whether something counts, ask your provider or check the IRS list before you withdraw.

Another mistake is not maximizing the account. If your employer offers an HSA match — some do — you are leaving information programs on the table if you do not contribute enough to get it. Check your benefits paperwork to see if your employer matches contributions.

A third mistake is paying medical expenses out of pocket and then forgetting to reimburse yourself from the HSA. You can withdraw at any time, even years later, as long as you have receipts. Some people deliberately pay out of pocket and let the HSA grow, then reimburse themselves in retirement — a valid strategy, but only if you keep the receipts.

Frequently Asked Questions

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

Yes, if your spouse is on your tax return. You can use HSA funds for medical expenses of you, your spouse, and any dependents you claim, regardless of whether they are on your health insurance plan. Keep receipts showing whose expense it was.

What happens to my HSA if I turn 65?

Your HSA continues to exist and you can still withdraw for medical expenses tax-free. After 65, you can also withdraw for any reason without the 20% penalty — you only owe income tax on non-medical withdrawals, like a traditional IRA. The account never expires.

Can I contribute to an HSA if I have Medicare?

No. Once you enroll in Medicare, you are no longer may be able to access to contribute to an HSA. You can still withdraw from an existing HSA for medical expenses, but you cannot add new money. If you delay Medicare enrollment, you can continue contributing to an HSA until the month you enroll.

Do I have to use my HSA every year or lose the money?

No. Unlike an FSA, HSA money rolls over indefinitely. You can let it accumulate for years and withdraw whenever you need it. There is no "use it or lose it" rule, which makes an HSA a true long-term savings tool.

What if I withdraw money and later find out it was not a may have access to expense?

You owe income tax on the amount plus a 20% penalty. If you discover the mistake, you can file an amended tax return to correct it. Keep documentation of what you spent on and why — that is your defense if the IRS questions the withdrawal.