What happens when you open an HSA and start using it

An HSA is a bank account paired with a high-deductible health insurance plan. Money goes in through payroll deductions (if your employer offers it) or direct deposits you make yourself. That money sits in the account earning interest, and you withdraw it to pay medical bills—doctor visits, prescriptions, dental work, vision care, and certain medical equipment. The account is yours to keep even if you change jobs or insurance plans.

The mechanics are straightforward: you fund the account, the money accumulates, you spend it on may have access to medical expenses, and you keep receipts to prove the spending was allowed. Unlike a flexible spending account (FSA), which forces you to use the money or lose it each year, an HSA rolls over indefinitely. After age 65, you can withdraw money for any reason without penalty, though non-medical withdrawals before 65 are taxed and penalized.

Key Takeaways

  • You can only open an HSA if you are enrolled in a high-deductible health plan (HDHP), and you must not be covered by other health insurance or claimed as a dependent on someone else's taxes.
  • Money enters through payroll deduction, direct deposit, or check, and the account itself functions like a savings account with a debit card attached for medical purchases.
  • Withdrawals for may have access to medical expenses are tax-free; non-may have access to withdrawals before age 65 are taxed as income plus a 20 percent penalty.
  • The account balance carries forward year to year with no "use it or lose it" important date, and you own it regardless of employment or insurance changes.
  • After age 65, you can withdraw money for any reason, though non-medical withdrawals are taxed as ordinary income without the penalty.

Who can open an HSA and what the may be able to access rules actually mean

You must be enrolled in a high-deductible health plan (HDHP) to open an HSA. In 2024, an HDHP means a deductible of at least $1,600 for individual coverage or $3,200 for family coverage, with an out-of-pocket maximum of $4,000 or $8,000 respectively. These numbers change annually. Your employer or insurance broker can confirm whether your plan qualifies.

You also cannot be covered by any other health insurance—not Medicare, not your spouse's plan, not a parent's plan if you are claimed as a dependent. You cannot have used a flexible spending account (FSA) or health reimbursement arrangement (HRA) in the same calendar year. If you turn 65 and enroll in Medicare, you stop being HSA-may be able to access, though you keep the account and can continue withdrawing from it.

The account itself is opened through a bank, credit union, or financial services company that offers HSA products. Your employer may have a preferred provider, or you can open one independently. The process is similar to opening any savings account: you provide identification, Social Security number, and initial funding information.

How money gets into the account

If your employer offers an HSA, the easiest route is payroll deduction. You elect a contribution amount during open enrollment, and that amount is deducted from your paycheck before taxes are calculated. This reduces your taxable income for the year. For 2024, the contribution limit is $4,150 for individual coverage or $8,300 for family coverage; these limits change annually.

You can also fund an HSA yourself through direct deposit or check. Self-employed people and those whose employers do not offer HSAs often do this. The contribution limits are the same whether the money comes from payroll or your own bank account. You must make contributions by the tax filing important date (usually April 15) to count them toward that year's limit.

If you contribute more than the annual limit, the excess is taxed and penalized. If you contribute less than allowed, you straightforward do not use the full allowance that year—there is no penalty for under-contributing. The money you do contribute earns interest or investment returns depending on how the account is structured; some HSAs function like savings accounts, others allow you to invest the balance in mutual funds or stocks.

What you can spend HSA money on and what you cannot

may have access to medical expenses include doctor visits, hospital stays, surgery, prescription medications, dental work, vision care, hearing aids, and certain medical equipment like blood pressure monitors or glucose meters. Mental health treatment, physical therapy, and chiropractic care count. Over-the-counter medications like pain relievers and cold medicine count only if you have a prescription for them. Vitamins and supplements do not count unless prescribed by a doctor for a specific medical condition.

What does not count: cosmetic procedures, gym memberships, general wellness products, and insurance premiums (with narrow exceptions for COBRA, long-term care insurance, and health insurance while unemployed). Teeth whitening is cosmetic and does not count; root canals and fillings do. Laser eye surgery for vision correction counts; purely cosmetic laser procedures do not.

You withdraw money using a debit card linked to the account, or you pay out of pocket and request reimbursement later. Many people keep receipts and reimburse themselves years later, letting the account grow tax-free. The IRS does not require you to spend the money when ready; you can accumulate it and withdraw for past expenses at any point, as long as you have documentation.

The tax treatment and what happens at tax time

Contributions made through payroll are deducted before income tax and payroll tax are calculated, so they reduce both your federal income tax and your Social Security and Medicare taxes. This is the largest tax advantage of an HSA. If you contribute $3,000 through payroll and your combined tax rate is 25 percent, you save $750 in taxes.

Withdrawals for may have access to medical expenses are not taxed at all. The money comes out tax-free, and you do not report it on your tax return. You do need to keep receipts and documentation in case the IRS audits you, but you do not file forms or claim deductions.

If you withdraw money for a non-may have access to expense before age 65, that withdrawal is taxed as ordinary income plus a 20 percent penalty. If you withdraw $1,000 for a non-may have access to expense and your tax rate is 22 percent, you owe $220 in income tax plus $200 in penalty, for a total of $420. After age 65, the penalty disappears—non-may have access to withdrawals are taxed as income but not penalized.

How the account works when you change jobs or insurance

The HSA belongs to you, not your employer. When you leave a job, the account stays open and the money remains yours. You can continue making withdrawals for medical expenses, and you can continue contributing if you remain enrolled in an HDHP (whether through a new employer or the individual market). Some employers require you to move the account to a different provider or consolidate it with a new employer's HSA plan, but the money itself does not disappear.

If you switch to a health plan that is not an HDHP—a PPO or HMO with a lower deductible, for example—you stop being able to contribute to the HSA, but you can still withdraw from it for medical expenses. The account essentially becomes a medical savings account with no new contributions allowed. Once you re-enroll in an HDHP, you can resume contributions.

If you have multiple HSAs from different employers or accounts you opened yourself, you can consolidate them into one account. The total balance across all accounts counts toward your annual contribution limit, so you cannot exceed the limit by having multiple accounts.

Common mistakes and what to watch for

The most common mistake is withdrawing money for something you think is medical but is not. Over-the-counter medications without a prescription, vitamins, and cosmetic procedures are frequent culprits. If you withdraw for a non-may have access to expense, you owe income tax plus the 20 percent penalty, and you cannot undo it. Keep a list of what counts and what does not, or ask the HSA provider before you spend.

Another mistake is not keeping receipts. The IRS can audit HSA withdrawals years later, and you need documentation to prove the expense was may have access to. A receipt from a pharmacy or doctor's office is sufficient; a credit card statement alone is not. If you cannot produce a receipt, the withdrawal may be treated as non-may have access to and taxed retroactively.

Some people over-contribute by accident when they have multiple accounts or when their employer's contribution plus their own contribution exceeds the annual limit. The excess is taxed and penalized. If you discover an over-contribution before filing taxes, you can request a correction from the HSA provider, and they will report it to the IRS.

How HSAs compare to FSAs and other medical savings options

An FSA is an employer-sponsored account with a "use it or lose it" rule: money you do not spend by the end of the year is forfeited. An HSA has no important date and rolls over indefinitely. FSAs are easier to set up through an employer and do not require a high-deductible plan, but they do not accumulate wealth the way an HSA does. You cannot have both an FSA and an HSA in the same year.

A health reimbursement arrangement (HRA) is funded entirely by the employer, not by the employee. You cannot contribute to an HRA yourself. Like an FSA, an HRA may have a "use it or lose it" rule, though some employers allow rollover. An HRA is not portable—if you leave the job, the account typically closes.

An HSA is the only option that functions as both a medical savings account and a retirement account. The triple tax advantage—tax-deductible contributions, tax-free growth, and tax-free withdrawals for medical expenses—makes it the most powerful tool for people who can afford to let the money accumulate rather than spend it when ready.

Frequently Asked Questions

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

Yes, if your spouse is not covered by other health insurance. You can withdraw HSA funds for any family member's may have access to medical expenses, regardless of whether they are on your insurance plan. Keep receipts for each person's expenses in case of audit.

What happens to my HSA if I die?

The account passes to your beneficiary, usually your spouse or estate. If your spouse inherits it, they can continue using it as an HSA. If anyone else inherits it, the account is treated as taxable income to them, though they can still withdraw for your unpaid medical expenses without penalty.

Can I invest the money in my HSA?

Many HSA providers allow you to invest the balance in mutual funds, stocks, or bonds once it reaches a certain threshold (often $1,000 to $2,500). The growth is tax-free. Some providers offer only savings accounts with interest. Check with your provider about investment options.

Do I have to spend my HSA money on medical expenses, or can I save it?

You can save it indefinitely with no penalty. Many people use an HSA as a retirement account, letting the balance grow and withdrawing only for medical expenses in retirement. After age 65, you can withdraw for any reason without penalty, though non-medical withdrawals are taxed as income.

What if I contribute to an HSA and then lose my high-deductible plan?

You stop being able to contribute, but you keep the account and can withdraw from it for medical expenses. If you re-enroll in an HDHP later, you can resume contributions. The money you contributed while may be able to access remains yours.