You open an HSA through your employer's plan, a bank, or an insurance company—not through the government

An HSA account is not something you apply for with a government agency. Instead, you open one through a financial institution that offers HSA accounts: your employer's benefits administrator, a bank, a credit union, an insurance company, or a dedicated HSA provider like Lively or HealthEquity. The account itself is straightforward to set up—usually online in 10 to 15 minutes—but you can only open one if you are enrolled in a high-deductible health plan (HDHP). That enrollment is the gate. Without the HDHP, the account will not be approved.

The three most common routes are employer-sponsored (your company offers an HSA as part of benefits), direct enrollment with a bank or HSA provider (you find and open one yourself), or through your health insurance company when you buy a plan on the individual market. Each route has different timing and different requirements for proof that you have an HDHP.

Key Takeaways

  • You must be enrolled in a high-deductible health plan before you can open an HSA; the account provider will verify this enrollment before approving your account.
  • If your employer offers an HSA, enrollment usually happens during open enrollment or when you first become may be able to access, and the account opens within days.
  • If you are buying an HDHP on your own, you can open an HSA with a bank or dedicated provider once your plan is active, and you will need your plan documents or policy number as proof.
  • The IRS sets annual contribution limits—for 2024, $4,150 for individual coverage and $8,300 for family coverage—and these limits change each year.
  • You can have only one HSA at a time; if you already have one and open another, you risk over-contributing and owing taxes and penalties.

Opening an HSA through your employer

If your employer offers an HSA, the enrollment process is usually bundled with your health benefits enrollment. During open enrollment (typically October through December for coverage starting January 1), you will see the HSA option listed alongside your HDHP choice. You select the HDHP, and the HSA account opens automatically—or you are given a link to open it with the designated provider your company has chosen.

Timing matters here. If you enroll in an HDHP effective January 1, your HSA account typically opens within 3 to 5 business days. If you enroll mid-year due to a may have access to life event (marriage, birth, job change, loss of coverage), the account opens on the same timeline. Your employer's benefits team or the HSA provider will send you login credentials and a debit card, usually within one to two weeks.

You do not need to bring documents to prove your HDHP enrollment—your employer has already verified it. The provider pulls the information from your benefits record. If there is a delay or error, contact your employer's benefits administrator, not the HSA provider, because the employer is the source of truth.

Opening an HSA on your own with a bank or HSA provider

If you buy an HDHP through the individual market (healthcare.gov, your state's exchange, or directly from an insurance company), you can open an HSA with any bank or dedicated HSA provider that accepts individual accounts. Common providers include Lively, HealthEquity, Fidelity, Vanguard, and most major banks. You do not have to use the provider your insurance company recommends—you can shop around for lower fees or better investment options.

To open the account, you will need your health insurance policy number and proof that your plan qualifies as an HDHP. Most providers ask you to upload a copy of your Summary of Benefits and Coverage (SBC) or your policy documents. The SBC is a one-page document your insurance company sends when you enroll; it lists your deductible, copays, and out-of-pocket maximum. If you cannot find it, log into your insurance company's website or call and request it.

The account usually opens within 1 to 3 business days once the provider verifies your HDHP status. Some providers offer instant approval if you provide your policy number and deductible amount; others require the full document. After approval, you will receive a debit card and online access within 5 to 10 business days.

What you need to have ready before you start

Gather these items before you begin the application, whether you are opening through your employer or on your own:

  • Your health insurance policy number (found on your insurance card or in your plan documents)
  • Your deductible amount and out-of-pocket maximum (from your plan documents or the SBC)
  • Your Social Security number
  • A valid government-issued ID
  • Your bank account information if you want to fund the HSA by direct transfer (optional; you can also mail a check or use payroll deduction if your employer offers it)
  • Proof of HDHP enrollment (your insurance company's letter, the SBC, or your policy documents)

If you are opening through your employer, you typically need only your Social Security number and ID. The employer provides the HDHP verification. If you are opening on your own, have your insurance documents ready—the process stalls if the provider cannot confirm your plan qualifies.

Contribution limits and the one-HSA rule

The IRS sets an annual limit on how much you can contribute to an HSA. For 2024, the limit is $4,150 for individual coverage and $8,300 for family coverage. These limits change each year; the IRS announces the new amounts in September for the following year. If you contribute more than the limit, you owe income tax on the overage plus a 6 percent excise tax, and you must file an amended return.

You can have only one HSA at a time. If you open a second account while the first is still active, you are violating the one-HSA rule. This matters most when you change jobs or switch insurance plans mid-year. If your old employer's HSA is still open, close it or roll it over to your new account before opening a new one. If you accidentally open two, contact both providers immediately and ask one to close the account and transfer the balance to the other.

If you are married and both spouses have individual HDHP coverage, each spouse can have a separate HSA. If you have family coverage, only one HSA is allowed between you, and either spouse can own it. Make sure you coordinate with your spouse so you do not accidentally open two.

Funding your HSA after it opens

Once your account is open, you can fund it in several ways. If your employer offers payroll deduction, that is usually the simplest—contributions come out of your paycheck before taxes, and you never see the money leave your bank account. You set up payroll deduction through your employer's benefits portal or by contacting your HR department.

If you are self-employed or your employer does not offer payroll deduction, you can transfer money from your bank account to your HSA online, by mail, or by automatic transfer. Most HSA providers let you set up recurring monthly transfers. You can also make a lump-sum contribution at any time during the year, as long as you do not exceed the annual limit.

Contributions made by April 15 of the following year count toward the previous year's limit. For example, if you open an HSA in December 2024, you can contribute to it through April 15, 2025, and those contributions count toward your 2024 limit. This is useful if you enroll in an HDHP late in the year and want to catch up.

Common delays and how to fix them

The most common reason an HSA account does not open is a mismatch between your HDHP enrollment and the provider's records. If your employer says you are enrolled in an HDHP but the HSA provider says they cannot verify it, ask your employer to re-submit your enrollment information to the provider. This usually takes 24 to 48 hours.

If you are opening an HSA on your own and the provider rejects your plan documents, call your insurance company and ask them to confirm in writing that your plan meets IRS requirements for an HDHP. Some plans are labeled "high-deductible" by the insurance company but do not meet the IRS definition—for example, if they have a copay for primary care visits, they do not may have access to. If your plan does not may have access to, you cannot open an HSA, and you will need to switch to a true HDHP to proceed.

If you are waiting for a debit card and it has been more than two weeks, contact the HSA provider directly. Cards sometimes get lost in the mail. The provider can issue a replacement or give you temporary access to your funds through online transfer while you wait.

Frequently Asked Questions

Can I open an HSA if I am on Medicare?

No. Once you enroll in Medicare, you are no longer may be able to access to contribute to an HSA, even if you also have an HDHP. You can keep an existing HSA and spend the money tax-free on medical expenses, but you cannot add new contributions. If you are approaching Medicare age and have an HSA, plan to stop contributing the month you enroll in Medicare.

What if my employer does not offer an HSA but I have an HDHP?

You can open an HSA on your own with any bank or HSA provider. You will need to provide proof of your HDHP enrollment (your insurance documents or policy number). Contributions are not made through payroll, so you will fund the account yourself by transfer or check. You can still deduct contributions on your tax return if you file Schedule C or itemize deductions.

Can I open an HSA before my HDHP coverage starts?

Most providers will not open an account until your HDHP is active. If your plan starts on January 1, you can usually open the HSA in late December once the insurance company confirms your enrollment. If you try to open it before the plan is active, the provider will ask you to reapply once coverage begins.

What happens to my HSA if I leave my job?

Your HSA stays with you. You own it, not your employer. When you leave, you can keep the account open with the same provider, or you can roll it over to a new HSA at a different bank or provider. You do not have to close it or spend the money. If your new employer offers an HSA, you can keep your old one and open a new one—but remember, you can have only one active HSA at a time, so you will need to roll the old one into the new one or close it.

Do I have to use the HSA provider my insurance company recommends?

No. Your insurance company may recommend a provider, but you can open an HSA with any institution that offers them. Shop around for low fees, good investment options, and customer service. Some providers charge monthly maintenance fees; others do not. Some offer investment choices; others keep the money in a savings account. Compare before you commit.