How an HSA savings account holds and grows your money

An HSA is a bank account attached to a high-deductible health plan, and the money in it belongs to you. You put money in (either through payroll deduction or a direct deposit), it sits in an account with a bank or financial institution, and you can spend it on medical expenses whenever you need to. The account earns interest or investment returns depending on how much money is in it and what the account provider offers.

The key difference from a regular savings account is that the money has a specific purpose: it's meant for medical costs. But legally, once the money is in your account, it's yours to keep, even if you change jobs or drop your high-deductible plan. The account doesn't disappear. The money doesn't expire. You can leave it there for decades if you want.

Most HSA accounts are held at banks, credit unions, or investment firms. Your employer may have chosen a specific provider, or you may have opened one on your own. The provider holds the actual cash and handles deposits, withdrawals, and any interest or investment growth. You access it through a debit card, online transfer, or check — just like a regular bank account.

Key Takeaways

  • Money you deposit into an HSA is yours permanently, even if you leave your job or switch health plans.
  • You can spend HSA money on may have access to medical expenses without paying taxes on the withdrawal, but non-medical withdrawals are taxed as income plus a 20% penalty.
  • HSA money can be invested in stocks, bonds, or mutual funds once your balance reaches a certain threshold (often $1,000 to $2,500), allowing it to grow beyond interest.
  • After age 65, you can withdraw HSA money for any reason without the 20% penalty, though non-medical withdrawals are still taxed as income.
  • You must keep receipts and records of medical expenses to prove they were may have access to if the IRS ever asks, even if you withdrew the money years ago.

How money gets into your HSA

If your employer offers an HSA, the easiest way to fund it is through payroll deduction. You choose how much to contribute each year (up to a limit set by the IRS, which changes annually), and that amount comes out of your paycheck before taxes are calculated. This means you pay no federal income tax, no Social Security tax, and no Medicare tax on that money.

You can also fund an HSA yourself if you don't have an employer plan or want to add more money beyond what your employer contributes. You deposit money directly into the account, either as a lump sum or over time. Self-funded contributions are tax-deductible when you file your tax return, so you get the same tax benefit as payroll deduction — just at tax time instead of on each paycheck.

Some employers contribute money to your HSA as part of your benefits package. This is information programs, and it counts toward your annual contribution limit. If your employer puts in $500 and you put in $2,000, your total contribution for the year is $2,500. You cannot exceed the annual limit regardless of how many sources fund the account.

What happens when you spend HSA money on medical costs

When you withdraw money from your HSA to pay for a may have access to medical expense, you pay no taxes on that withdrawal. may have access to expenses include doctor visits, prescriptions, dental work, vision care, mental health treatment, medical equipment, and many other healthcare costs. The IRS publishes a list of what counts, and it's fairly broad.

You don't need to submit receipts to your HSA provider when you make a withdrawal. You can straightforward use your debit card or request a check, and the money comes out. However, you must keep the receipts and documentation yourself. If the IRS ever audits your HSA, you need to prove that the money you withdrew was actually spent on may have access to expenses. Without receipts, the IRS can reclassify the withdrawal as non-medical, which means you owe income tax plus a 20% penalty on that amount.

Some people use their HSA as a long-term investment account and don't withdraw money for current medical expenses. Instead, they pay medical bills out of pocket and keep the receipts. Years or decades later, they can withdraw money from the HSA to reimburse themselves for those old expenses — as long as they still have the documentation. This strategy lets the HSA grow untouched while you cover medical costs with other money.

How HSA money grows through interest and investment

When your HSA balance is small, it typically earns interest like a regular savings account. The interest rate varies by provider and changes over time. Some accounts earn nearly nothing; others offer rates competitive with high-yield savings accounts. Check with your provider to see what rate they currently offer.

Once your balance reaches a certain threshold — usually $1,000 to $2,500, depending on the provider — you can invest the money in stocks, bonds, mutual funds, or other securities. This is optional. You can leave all your money in the savings portion if you prefer, or move some into investments. The growth from investments is not taxed as long as the money stays in the HSA and is eventually spent on may have access to medical expenses.

Investment growth in an HSA works the same way as in a 401(k) or IRA: you buy shares, they go up or down in value, and you pay no taxes on the gains while the money is in the account. If you withdraw invested money for a non-medical reason after age 65, you owe income tax on the gains but not the 20% penalty. If you withdraw for a may have access to medical expense at any age, you owe no tax on the gains.

What happens to your HSA if you change jobs or health plans

Your HSA stays with you. If you leave your job, the account doesn't close and the money doesn't go anywhere. You keep the account at the same bank or financial institution, and you can continue to use it for medical expenses. You can also continue to fund it yourself through direct deposits or tax-deductible contributions on your tax return.

If you switch to a different health plan that is not a high-deductible plan, you can no longer make new contributions to the HSA. However, the money already in the account remains yours and you can still withdraw it for may have access to medical expenses without taxes or penalties. Once you switch back to a high-deductible plan, you can resume contributions.

If you change jobs and your new employer offers an HSA with a different provider, you can roll your old HSA balance into the new one. This is a trustee-to-trustee transfer, meaning the money moves directly from one institution to the other without passing through your hands. You can also keep both accounts open if you prefer, though managing multiple HSAs adds complexity.

Non-medical withdrawals and what they cost

If you withdraw HSA money for something that is not a may have access to medical expense — a vacation, a car, groceries, anything else — you owe income tax on that amount plus a 20% penalty. So if you withdraw $1,000 for a non-medical reason and you're in the 22% tax bracket, you pay $220 in income tax plus $200 in penalty, for a total of $420. You keep $580.

This penalty applies at any age until you turn 65. After 65, the penalty goes away. You can withdraw HSA money for any reason without the 20% penalty, though you still owe income tax on non-medical withdrawals. This makes an HSA a powerful retirement savings tool: if you don't spend all the money on medical expenses while you're working, you can use it for anything after 65 and only pay income tax, not the penalty.

The income tax on a non-medical withdrawal is calculated based on your tax bracket for that year. If you withdraw $5,000 non-medically and you're in the 24% bracket, you owe $1,200 in tax plus $1,000 in penalty. The penalty is always 20% of the withdrawal amount, regardless of your tax bracket.

Keeping records and proving your expenses

The IRS does not require you to submit receipts when you withdraw HSA money, but you must keep them. Save the receipt, invoice, or explanation of benefits (EOB) from your insurance company for every medical expense you pay with HSA money. Store them in a folder, a spreadsheet, or a photo app — whatever system you'll actually use and remember.

If you use the strategy of paying medical bills out of pocket and reimbursing yourself from the HSA years later, keep those receipts even longer. You can reimburse yourself for medical expenses from years ago as long as you have documentation, but only if the expense happened after you opened the HSA. You cannot reimburse yourself for medical costs from before the account existed.

If the IRS audits your HSA, they will ask for receipts for withdrawals. Without them, the IRS can reclassify those withdrawals as non-medical, which means you owe back taxes and penalties. This is rare, but it happens. The burden is on you to prove the money was spent on may have access to expenses, not on the IRS to prove it wasn't.

Frequently Asked Questions

Can I use HSA money to pay my health insurance premium?

No, with one exception. You cannot use HSA money to pay premiums for your regular health insurance. However, you can use it to pay premiums for long-term care insurance, COBRA continuation coverage, or health insurance while you're unemployed and receiving unemployment benefits. Check the IRS rules for your specific situation.

What happens to my HSA if I don't use the money in a year?

The money rolls over to the next year. There is no "use it or lose it" rule with HSAs. You can let the balance grow year after year, and it will be there whenever you need it. This is different from a Flexible Spending Account (FSA), which has a use-it-or-lose-it rule.

Can I withdraw HSA money 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, and your dependents, regardless of whether they are covered under your health plan. You just need to keep receipts proving the expense was medical and may have access to.

What if I inherit an HSA from someone else?

The rules depend on who the account owner was. If your spouse owned it, you can treat it as your own HSA. If someone else owned it, the account becomes taxable income to you, and you lose the HSA tax benefits. Consult a tax professional if this situation applies to you.

Can I move money between my HSA and a regular savings account?

You can withdraw money from your HSA and deposit it into a regular savings account, but if it's not for a may have access to medical expense, you owe income tax and a 20% penalty on the amount. There is no way to move HSA money to another account and keep the tax benefits unless you're rolling the entire HSA to a new provider.