How to Apply for an FSA or HSA: Eligibility and Enrollment

To apply for an FSA or HSA, start by confirming which account you’re eligible for, then enroll through the right channel: a Flexible Spending Account runs entirely through your employer’s benefits system during open enrollment, while a Health Savings Account can be opened through your employer or on your own at a bank, credit union, or brokerage as long as you’re covered by a qualifying high deductible health plan. Both accounts use pre-tax dollars for medical expenses, but eligibility, enrollment steps, and what happens to the money afterward differ enough that the choice matters before you sign anything.

Do You Qualify for an HSA

You can contribute to an HSA only if you’re enrolled in a high deductible health plan on the first day of the month you want to contribute for.1Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts For 2026, that plan must carry an annual deductible of at least $1,700 for individual coverage or $3,400 for family coverage, with an out-of-pocket maximum no higher than $8,500 for individual coverage or $17,000 for family coverage.2Internal Revenue Service. Revenue Procedure 2025-19 If you aren’t sure your plan qualifies, check the summary of benefits or call the insurer.

You also need to meet three personal conditions. You cannot have any other health coverage that isn’t a qualifying HDHP; a general-purpose health care FSA through a spouse’s employer would disqualify you, though a limited-purpose FSA covering only dental and vision would not. You cannot be enrolled in Medicare, and if you’re claiming Social Security benefits after 65, Medicare Part A enrollment is automatic and retroactive.3Internal Revenue Service. Individuals Who Qualify for an HSA And you cannot be claimed as a dependent on someone else’s return.1Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts

If you become eligible partway through the year, you can generally only contribute a prorated amount for the months you qualified. The last-month rule is the exception: if you’re eligible on December 1, you can contribute the full annual amount, but you have to remain eligible through the following December 31 or face income tax plus a 10 percent penalty on the excess.4Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans

Expanded Eligibility Starting in 2026

The One, Big, Beautiful Bill Act opens HSA eligibility to people who were previously locked out. Starting January 1, 2026, bronze-level and catastrophic plans from the ACA marketplace are treated as HSA-compatible whether or not they meet the traditional deductible and out-of-pocket definitions, and the IRS has clarified that these plans don’t have to be purchased through a marketplace exchange to qualify. People in direct primary care arrangements can now contribute to an HSA and use HSA funds tax-free for periodic DPC fees, and the ability to receive telehealth before meeting your deductible without losing HSA eligibility is now permanent.5Internal Revenue Service. Treasury, IRS Provide Guidance on New Tax Benefits for Health Savings Account Participants Under the One, Big, Beautiful Bill If your plan disqualified you before, look again for 2026.

Do You Qualify for an FSA

You cannot open an FSA on your own. Your employer has to sponsor a Section 125 cafeteria plan, which is the legal structure that lets you choose between taxable wages and pre-tax benefits.6Internal Revenue Service. FAQs for Government Entities Regarding Cafeteria Plans If your employer offers one, you’re generally eligible as an active employee. There’s no health plan type requirement for a standard health care FSA, so any employee with plan access can enroll regardless of what insurance they carry.

Two distinctions are worth knowing before you sign up. A health care FSA and a dependent care FSA are separate accounts: the health care FSA covers medical, dental, and vision expenses for you and your dependents, while the dependent care FSA covers childcare and eldercare costs that let you work. You can enroll in either or both if both are offered. And if you or your spouse has an HSA, a general-purpose health care FSA will disqualify the HSA holder from contributing; a limited-purpose FSA covering only dental and vision preserves the HSA.

How to Apply for an HSA

If your employer offers an HSA through a specific custodian, enrollment usually happens during open enrollment alongside your health insurance election. You pick an annual contribution amount on the benefits portal, and pre-tax deductions start automatically from your paycheck. Many employers also make contributions to your account, so check whether there’s an employer match on the table before you decide how much to contribute yourself.

You can also open an HSA independently at a bank, credit union, or brokerage that acts as an HSA custodian, with no employer involvement at all. You’ll need to confirm that your health plan qualifies as an HDHP and provide its deductible amounts and effective date. The custodian will ask for government-issued identification and your Social Security number to satisfy federal identity verification rules. Contributions you make outside of payroll are deposited with after-tax dollars, and you claim the deduction on your tax return.

Most HSA applications ask you to name a beneficiary. If you skip that step, the balance goes to your estate at death, which can create tax complications for your heirs. Many custodians also let you invest your balance in mutual funds once it clears a minimum threshold, often around $1,000. Investing is optional, but it’s worth considering if you plan to treat the HSA as a long-term savings vehicle.

How to Apply for an FSA

FSA enrollment runs entirely through your employer. During open enrollment, your HR department or benefits portal will present the option to set up a health care FSA, a dependent care FSA, or both. The core document is a salary reduction agreement authorizing your employer to divert part of each paycheck into the account before taxes are calculated.

You’ll enter the total amount you want to contribute for the year, and the system splits it across your pay periods. If you elect $3,400 over 26 biweekly pay periods, roughly $130.77 comes out of each check. Choose this figure carefully. You generally cannot change your FSA election mid-year unless you have a qualifying life event like marriage, the birth of a child, or a change in employment status.7HealthCare.gov. Qualifying Life Event

Once processed, you’ll typically get a debit card linked to the FSA and access to an online portal for claims and balance tracking. Your full annual election is available to spend from day one of the plan year, even though payroll deductions happen gradually. That front-loading is one of the few structural advantages an FSA holds over an HSA.

When Enrollment Happens

Employer-sponsored FSA and HSA elections almost always happen during open enrollment, which most companies run in the fall for a January 1 start date. Outside that window, you can change elections only after a qualifying life event: marriage or divorce, a new child, adoption, loss of other coverage, or a similar significant change.7HealthCare.gov. Qualifying Life Event New hires generally get an enrollment window at the start of employment regardless of the open enrollment calendar.

If you’re opening an HSA independently at a bank or brokerage, no enrollment period restriction applies. You can open the account any time you have qualifying HDHP coverage and contribute up until the tax filing deadline for that year, typically April 15 of the following year.

2026 Contribution Limits

Before entering an election amount, know the ceilings. For 2026:

The HSA limit counts contributions from every source: your payroll deductions, employer contributions, and anything you deposit on your own. If both spouses have self-only HDHP coverage, each can contribute up to $4,400 to their own HSA. If one spouse carries family HDHP coverage, combined household contributions across both spouses’ HSAs cannot exceed $8,750. When both spouses are 55 or older, each can add the $1,000 catch-up to their own account.

Pick Your FSA Election Carefully

An FSA runs on a use-it-or-lose-it rule: any funds left in your account at the end of the plan year are forfeited.10Internal Revenue Service. Notice 2013-71 – Modification of Use-or-Lose Rule for Health FSAs Your employer can soften that with one of two options, but not both. A grace period gives you an extra two months and 15 days after the plan year ends to incur expenses using leftover funds.11Internal Revenue Service. IRS: Eligible Employees Can Use Tax-Free Dollars for Medical Expenses A rollover lets up to $680 of unused funds carry into the following plan year, and your employer can set a lower cap.

Your employer is not required to offer either option, and many don’t. Before you finalize an election amount, find out which rule your plan follows. If it offers neither, every unspent dollar disappears at the end of the plan year. Estimate conservatively; contributing less is better than losing hundreds of dollars. An HSA has no forfeiture rule at all, and unspent funds remain yours indefinitely.

What Happens If You Leave Your Job

Before you commit, know what follows you and what doesn’t. An HSA belongs to you, not your employer. When you leave a job, the money stays in the account, and you can keep spending it on qualified medical expenses regardless of your new insurance. You can also roll the balance into a new HSA at a different custodian with no tax consequence. If your new employer doesn’t offer an HDHP, the existing balance is still yours to use or invest; you just cannot make new contributions until you’re back on qualifying coverage.4Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans

An FSA does not follow you. When employment ends, you generally lose access to the account and forfeit any remaining balance unless you elect COBRA continuation coverage for the FSA, which usually means paying with after-tax dollars and defeats the purpose. You can still submit claims for expenses incurred during your active coverage period, but the window closes quickly. If you know you’re leaving, schedule dental work, order spare contacts, or stock up on eligible supplies before your last day.