Yes, you can use an HSA to pay your deductible. Your deductible is a qualified medical expense under IRS rules, so every dollar you pull from the Health Savings Account to cover it comes out tax-free.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses The same is true of the copays and coinsurance you owe after the deductible is met.2HealthCare.gov. What Are Health Savings Account-Eligible Plans? There’s one timing rule that catches people, plus a short list of things HSA money can’t touch. Details below.
How to Pay the Deductible from Your HSA
Before you send any money, pull up the Explanation of Benefits from your insurer. The EOB shows the negotiated rate and breaks out exactly how much of the bill applies to your deductible. The figure on your provider’s invoice should match that deductible amount. If it doesn’t, call the billing office before paying. Billing errors are common, and you don’t want to move HSA funds against a wrong number.
Paying at the Point of Service
Most HSA administrators issue a debit card tied to your account balance. Swiping it at the doctor’s office or pharmacy pulls funds straight from the HSA. If you don’t have the card on you, most administrators let you log into a web portal and send an electronic payment to the provider using the invoice number and remittance address on the bill. Check your available balance first. A decline doesn’t cost you anything, but it makes for an awkward moment at the front desk.
Reimbursing Yourself Later
If you already paid the deductible out of a checking account or on a credit card, you can reimburse yourself from the HSA afterward. Submit the request through your administrator’s portal with the date of service and amount, keep the receipt and EOB, and the money usually lands in your bank account by direct deposit within a few business days.
Here’s the piece most people don’t know: there is no federal deadline for HSA reimbursement.3Internal Revenue Service. Distributions for Qualified Medical Expenses You can pay a deductible bill from your own pocket today and reimburse yourself from the HSA years later, so long as the expense was incurred after you opened the account. Some account holders use this on purpose: pay medical bills from regular savings, let the HSA balance sit invested and compound, then pull reimbursements out down the road. The tradeoff is recordkeeping. You have to be able to prove the expense qualified whenever you eventually take that distribution.
When the Expense Has to Have Happened
The medical charge has to occur after the HSA is established. If you had a hospital bill in December and didn’t open the account until January, HSA money can’t legally pay that older bill even though the funds are sitting in the account. Pulling money out for a non-qualified expense triggers income tax on the amount plus a 20% additional tax if you’re under 65.4Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans After 65 the 20% penalty falls away, but the ordinary income tax still applies to any non-medical distribution.
Whose deductible you can pay matters too. HSA funds cover qualified expenses for you, your spouse, and your tax dependents. That’s a narrower group than your health plan covers. Your insurance may cover an adult child up to age 26, but HSA funds can only pay that child’s medical bills if they’re your tax dependent, which for full-time students generally means under 24.
The list of what counts as a qualified expense is broad. Publication 502 covers doctor visits, lab work, prescription drugs, dental care, mental health services, X-rays, and physical exams, among others.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses Since the CARES Act, over-the-counter medicine like pain relievers, allergy pills, and cold remedies qualifies without a prescription, and menstrual care products are explicitly eligible.5Office of the Law Revision Counsel. 26 U.S. Code 223 – Health Savings Accounts
What HSA Money Can’t Pay For
Health insurance premiums are generally not qualified expenses, even though they feel like a medical cost. Four narrow exceptions exist:
- COBRA continuation coverage after leaving a job
- Health coverage premiums paid while you’re receiving unemployment benefits
- Medicare premiums if you’re 65 or older, including Parts A, B, and D, but not Medigap supplemental policies
- Long-term care insurance, subject to age-based annual limits
These exceptions extend to a spouse or dependent’s coverage, with one wrinkle: Medicare premiums for a spouse who is 65 or older only qualify if you, the account holder, are also 65 or older.4Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans
If You Use HSA Funds by Mistake
Say you swiped the HSA debit card for something you later realized wasn’t a qualified expense. You can return the money to the account without owing tax or the 20% penalty, provided you do it by the due date of your tax return (without extensions) for the first year you realized the mistake. Your administrator isn’t required to accept the return, but most will. A repayment doesn’t count as a new contribution, so it won’t eat into your annual limit.6Internal Revenue Service. Instructions for Forms 1099-SA and 5498-SA (2025)
Miss that deadline and the distribution stays taxable. You’ll owe income tax on the amount, plus 20% if you’re under 65.
Tax Reporting and the Records You Need
Any year you contribute to or take money out of an HSA, you file Form 8889 with your federal return, whether or not you’d otherwise have to file. The form tallies contributions, computes your deduction, and reports distributions, including any non-qualified amount that’s subject to the extra 20% tax.7Internal Revenue Service. Instructions for Form 8889 (2025)
Keep every receipt, EOB, and invoice tied to a qualified expense. The IRS’s general recordkeeping guidance is at least three years from the filing date, matching the standard assessment period.8Internal Revenue Service. Topic No. 305, Recordkeeping If you’re leaving unreimbursed expenses on the table to reimburse yourself later, hold onto the paperwork for as long as those expenses remain unreimbursed. Scan everything.
A State Tax Wrinkle
The federal treatment of HSAs is uniform, but state income tax isn’t. California and New Jersey tax HSA contributions, earnings, and withdrawals at the state level. Your federal deduction is safe if you live there, but you’ll pay state tax on what you put in and on any investment gains inside the account. Most other states with an income tax mirror the federal rules. Confirm your state’s position before you rely on the full tax advantage.