You control the money in your HSA the same way you control a checking account, except the money is earmarked for medical costs and grows tax-free if you don't spend it

An HSA works in three phases: you put money in (usually through payroll deductions), you spend it on medical expenses, and any balance you don't use rolls forward to next year and grows. You get a debit card or checkbook tied to the account, and you use it to pay doctors, pharmacies, and other providers directly. The money you contribute reduces your taxable income that year, the growth is tax-free, and withdrawals for may have access to medical expenses are tax-free. If you withdraw money for non-medical reasons, you pay income tax plus a 20% penalty—but only on the amount you withdraw for that purpose, not the whole account.

The catch is knowing what counts as a may have access to medical expense. The IRS has a specific list, and it's narrower than you might think. Gym memberships don't count. Cosmetic surgery doesn't count. But dental work, vision care, prescription drugs, copays, deductibles, and medical equipment all do. You can also use HSA money to pay health insurance premiums if you're receiving unemployment benefits, or to pay Medicare premiums once you turn 65.

Key Takeaways

  • You access HSA money through a debit card, checkbook, or online transfer, and you can spend it when ready on any may have access to medical expense without waiting for reimbursement.
  • may have access to expenses include copays, deductibles, prescription drugs, dental work, vision care, and medical equipment, but not gym memberships, cosmetics, or most over-the-counter items without a prescription.
  • Money you don't spend in a given year stays in the account and grows tax-free, so you can build a balance over time and use it in future years.
  • If you withdraw money for non-medical reasons before age 65, you owe income tax plus a 20% penalty on that withdrawal only.
  • After age 65, you can withdraw money for any reason without the 20% penalty, though non-medical withdrawals are still taxed as income.

How to pay for medical expenses with your HSA

Most HSAs come with a debit card that works like a regular bank card. You swipe it at the pharmacy, the doctor's office, or the hospital, and the money comes out of your HSA balance. Some providers—especially large hospital systems—will ask you to verify that the charge is for a may have access to expense, but many don't. Keep your receipt anyway, because the IRS can ask you to prove that a withdrawal was for a may have access to expense if you're ever audited.

If your HSA doesn't have a debit card, or if you want to pay out of pocket and reimburse yourself later, you can write a check or transfer money online to your bank account. Some people do this intentionally: they pay medical bills with their regular checking account, keep the receipts, and then reimburse themselves from the HSA months or even years later. This strategy lets the HSA balance grow longer before you touch it, though it requires you to keep organized records.

A few expenses trip people up. Over-the-counter medications like ibuprofen or cold medicine don't count unless a doctor writes a prescription for them. Vitamins and supplements don't count. Toothpaste and mouthwash don't count. But prescription medications, dental crowns, eyeglasses, hearing aids, and crutches all do. If you're unsure, the IRS publishes a full list on its website, and your HSA provider's customer service can usually answer specific questions.

What happens to money you don't spend

Unlike a flexible spending account (FSA), an HSA has no "use it or lose it" rule. Whatever balance remains at the end of the year stays in your account and earns interest or investment returns, depending on how your HSA is set up. Some HSAs function like savings accounts and earn a small interest rate. Others let you invest the balance in mutual funds or other securities, similar to a 401(k), so the money can grow significantly over time.

This is one of the biggest advantages of an HSA: it becomes a long-term savings vehicle for medical expenses in retirement. Many people contribute the maximum amount each year, spend only what they need for current medical costs, and let the rest accumulate. At 65, you can withdraw money for any reason without the 20% penalty (though you'll still owe income tax on non-medical withdrawals), so the account essentially becomes a second retirement account.

The downside is that if you withdraw money for non-medical reasons before 65, you owe income tax on the withdrawal plus a 20% penalty. So if you withdraw $1,000 for a non-medical reason and you're in the 22% tax bracket, you'd owe $220 in income tax plus $200 in penalty, for a total of $420. That's why most people treat the HSA as off-limits except for genuine medical expenses.

Keeping records of your spending

The IRS doesn't require you to submit receipts when you make a withdrawal, but it can ask you to prove that a withdrawal was for a may have access to expense during an audit. This means you need to keep receipts and documentation for at least three years, and ideally longer. A straightforward system works: save your receipts in a folder, take photos of them, or scan them into a computer file organized by year.

Your HSA provider will send you an annual statement showing all deposits and withdrawals, but that statement doesn't prove what the money was spent on. The burden is on you to show that each withdrawal matched a may have access to expense. If you can't produce documentation, the IRS can reclassify the withdrawal as non-medical, which means you'd owe back taxes and penalties.

Some people use a spreadsheet to track expenses as they happen: the date, the provider, the amount, and what it was for. Others keep a folder of receipts organized by month. The method doesn't matter as long as you can match each withdrawal to a specific medical expense if asked.

Using your HSA after you turn 65

At 65, the rules change. You can withdraw money from your HSA for any reason without the 20% penalty. You'll still owe income tax on non-medical withdrawals, but the penalty goes away. This makes the HSA function like a traditional IRA at that point: you can use it for medical expenses tax-free, or for anything else and pay income tax like you would on any other retirement income.

Many people use this flexibility to cover Medicare premiums, long-term care insurance, or out-of-pocket medical costs that aren't covered by Medicare. Others straightforward use the HSA as a general retirement fund once they reach 65, since the tax penalty is no longer a concern.

Moving your HSA if you change jobs or insurance

Your HSA belongs to you, not your employer or your insurance company. If you leave your job or switch health plans, the money stays in your account. You can keep the HSA open with the same provider, or you can roll it over to a new HSA at a different bank or investment firm. The process is similar to rolling over a 401(k): you request a direct transfer from the old provider to the new one, and the money moves without any tax consequences.

Some employers offer HSAs through a specific bank or administrator, but once you leave that job, you can move the account elsewhere. You're not locked in. The only time you lose access to an HSA is if you drop your high-deductible health plan and switch to a plan that doesn't may have access to (like a traditional PPO or HMO), in which case you can no longer contribute new money, but you can still withdraw from the existing balance for may have access to expenses.

Common mistakes to avoid

The biggest mistake is treating the HSA like a regular savings account and withdrawing money for non-medical reasons without realizing the penalty. If you need cash, use your emergency fund or another savings account instead. The 20% penalty is steep, and it applies on top of income tax.

Another common error is not keeping receipts. Years later, if you're audited, you won't be able to prove what the money was spent on. Even if you remember, the IRS won't accept your word without documentation.

A third mistake is not realizing that you can't contribute to an HSA if you're covered by a non-may have access to health plan. If you have a spouse on a traditional PPO while you're on a high-deductible plan, you can't contribute to an HSA. The rules are strict about this, and violations can result in penalties and taxes on the contributions.

Frequently Asked Questions

Can I use my HSA debit card at any doctor or pharmacy?

Yes, you can use it at any provider that accepts debit cards. However, some providers may ask you to verify that the charge is for a may have access to medical expense. Keep receipts regardless, because the IRS can ask you to prove the expense later.

What if I spend all my HSA money and then have a medical emergency?

You'll have to pay the emergency out of pocket or use another payment method. The HSA is a savings tool, not insurance. If you anticipate high medical costs, it's wise to keep a balance in the account rather than spending it all each year.

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

Yes, as long as your spouse is your dependent for tax purposes. You can use HSA funds to pay for may have access to medical expenses for yourself, your spouse, and any dependents, even if they're not on your health plan.

What happens to my HSA if I die?

The HSA becomes part of your estate. If your spouse is the beneficiary, they can continue to use it for may have access to medical expenses tax-free. If a non-spouse inherits it, they owe income tax on the full balance, though not the 20% penalty.

Can I invest my HSA balance like a 401(k)?

It depends on your HSA provider. Some offer only savings accounts with interest. Others let you invest in mutual funds, stocks, or bonds once your balance reaches a certain threshold, often $1,000 or $2,000. Check with your provider about investment options.