You need an HSA-may be able to access health plan first, then open an account at a bank or financial institution

You cannot open an HSA on your own. The first step is to be enrolled in a high-deductible health plan (HDHP) — a specific type of health insurance offered by your employer, the ACA marketplace, or Medicare Advantage. Once you have that coverage, you can open an HSA account at a bank, credit union, or investment firm. The two steps happen separately: your health plan does not automatically create the account for you, and you do not need permission from your employer or insurer to open one.

The timing matters. You can open an HSA only during the months you are covered by an HDHP. If you switch to a different health plan that is not HDHP-may have access to, you can no longer contribute new money, though you keep the account and the money already in it. If you go back to an HDHP later, you can start contributing again.

Key Takeaways

  • Your health insurance must be an HDHP to open an HSA; employer plans, marketplace plans, and Medicare Advantage plans can all may have access to, but you need to confirm the specific plan meets the deductible and out-of-pocket limits set by the IRS each year.
  • You open the HSA account itself at a separate financial institution — your bank, credit union, or investment firm — not through your health plan or employer.
  • You can contribute money to your HSA through payroll deduction (if your employer offers it), by sending a check or transfer to the HSA provider, or by setting up automatic transfers.
  • If you miss the deadline to open an HSA in the year you become HDHP-may be able to access, you can still open one later in that same year and contribute a prorated amount based on how many months you were covered.

Confirm your health plan is HDHP-may have access to

Not every high-deductible plan is HSA-may be able to access. The IRS sets minimum deductible amounts and maximum out-of-pocket limits each year, and your plan must fall within those ranges. For 2024, an HDHP for individual coverage must have a deductible of at least $1,600 and out-of-pocket maximum of no more than $8,050; for family coverage, those numbers are $3,200 and $16,100. These amounts change annually.

Check your plan documents or call your health insurer to confirm your plan qualifies. Look for language stating the plan is "HSA-compatible" or "HSA-may be able to access." If you are shopping for coverage on the ACA marketplace, the plan details page will note whether it qualifies. If you are on Medicare, only certain Medicare Advantage plans are HDHP-may have access to; Original Medicare does not work with HSAs.

If your employer offers health coverage, ask your benefits administrator which plans are HSA-may be able to access. Some employers offer multiple plans, and only some may may have access to. Do not assume a plan with a high deductible is automatically HSA-may be able to access — the IRS limits also apply to what the plan can cover before you meet the deductible, and some plans do not meet those rules.

Choose a financial institution to hold your HSA

Your HSA account is separate from your health plan. You can open it at a bank, credit union, or investment firm — the choice is yours, and your employer or insurer does not control where you bank. Some employers partner with a specific HSA provider and offer payroll deduction through that provider, but you are not required to use it. You can open an account elsewhere and contribute on your own.

Compare what different providers offer. Some charge monthly maintenance fees; others waive fees if you maintain a minimum balance. Some allow you to invest HSA money in stocks, bonds, or mutual funds; others keep it in a savings account earning interest. Some provide a debit card for medical expenses; others require you to pay out of pocket and reimburse yourself later. Read the fee schedule and account terms before you choose.

Once you have decided, go to the provider's website or visit in person to open the account. You will need your Social Security number, proof of HDHP coverage (your insurance card or a letter from your employer), and a government ID. The application takes 10 to 20 minutes online. Some providers approve accounts the same day; others take a few business days.

Set up contributions through payroll or direct transfer

Once your account is open, you can start funding it. If your employer offers payroll deduction, you can authorize them to send a portion of your paycheck directly to your HSA. This is the easiest method because the money comes out before taxes, lowering your taxable income automatically. Ask your benefits or payroll department for the form to set up payroll contributions.

If you do not have payroll deduction, or if you want to contribute more than your employer allows, you can transfer money directly from your bank account to your HSA. Set up a one-time transfer or recurring automatic transfers through your HSA provider's website or mobile app. You can also mail a check to the provider, though this takes longer.

You can contribute up to a yearly limit set by the IRS. For 2024, the limit is $4,150 for individual coverage or $8,300 for family coverage. These limits change each year. If you turn 55 during the year, you can contribute an extra $1,000 as a catch-up contribution. If you become HDHP-may be able to access partway through the year, you can contribute a prorated amount based on the number of months you were covered.

Understand the deadline for opening an account in your first year

You can open an HSA anytime during the year you become HDHP-may be able to access. There is no single enrollment period. However, if you want to contribute for the full year, you should open the account as soon as you enroll in the HDHP. If you open it later in the year, your contribution is prorated based on how many months remain.

The tax deadline to contribute for a given year is April 15 of the following year. For example, if you become HDHP-may be able to access in November 2024, you can open an HSA and contribute money for November and December 2024 anytime through April 15, 2025. You can also file an amended tax return to claim the contribution if you miss that deadline, but it is simpler to contribute on time.

What happens after you open the account

Once your account is open and funded, you can use the money to pay for may have access to medical expenses — doctor visits, prescriptions, dental work, vision care, and many other health costs. Keep receipts for everything you pay for. You do not have to submit receipts to your HSA provider unless you withdraw money; the receipts are for your tax records in case of an audit.

If you use the HSA debit card, the transaction is usually flagged as a medical expense automatically. If you pay out of pocket and reimburse yourself later, transfer the money from your HSA to your checking account. You can do this anytime; there is no deadline to reimburse yourself for past expenses.

Money you do not spend stays in the account and rolls over year to year. Unlike a flexible spending account (FSA), there is no "use it or lose it" rule. You can let the balance grow and use it later in life, or even invest it for retirement.

Frequently Asked Questions

Can I open an HSA if my employer does not offer one?

Yes. You can open an HSA at any bank or financial institution as long as you are enrolled in an HDHP. Your employer does not have to sponsor or contribute to it. If you buy your own HDHP through the ACA marketplace or Medicare Advantage, you can still open an HSA independently.

What if I already have an FSA or HRA?

You cannot have an HSA and an FSA at the same time in the same year. If your employer offers both, you must choose one. An HRA (health reimbursement arrangement) has different rules; some HRAs are compatible with HSAs and some are not. Ask your benefits administrator whether your specific HRA allows HSA contributions.

Do I have to contribute the maximum amount?

No. You can contribute any amount up to the yearly limit, or nothing at all. If you do not contribute through payroll, you can contribute whenever you want during the year. There is no minimum contribution required.

What if I leave my job?

Your HSA stays with you. The account is yours, not your employer's. If your new job offers an HDHP, you can keep contributing to the same HSA or open a new one. If your new job does not offer an HDHP, you can still keep the account and the money in it, but you cannot add new contributions until you enroll in another HDHP.

Can I open an HSA if I am on Medicare?

Only if you are on a Medicare Advantage plan that qualifies as an HDHP. If you are on Original Medicare, you cannot open an HSA. Once you enroll in Original Medicare, you lose HSA may be able to access even if you had an account before, though you keep the money already in the account and can use it for medical expenses.