Can You Use an HSA for Old Medical Bills? Dates, Records, and Taxes

Yes, you can use an HSA to pay old medical bills, and there is no deadline for doing it. The only firm cutoff is that the expense must have been incurred after you opened and funded your HSA. A bill from five or ten years ago is still eligible for tax-free reimbursement today, as long as you have documentation, the expense wasn’t paid by insurance, and you didn’t already deduct it on a past tax return.¹

The Establishment Date Is the Only Hard Cutoff

Your HSA can only reimburse qualified medical expenses incurred after the account was established. Anything before that date is permanently ineligible, no matter how large the bill or how recently you paid it.¹

State law determines exactly when the account is considered established, which is typically the date the trust or custodial account is opened and funded.¹ Once that date passes, the reimbursement window opens and never closes. You could get treatment today, pay cash for it, invest your HSA balance, and reimburse yourself years later for the original expense amount. The account owes you that money whenever you decide to take it, provided you can still prove the expense.

Keep Your Original Date When You Switch Custodians

Moving your HSA to a new provider doesn’t reset the clock. An HSA funded by amounts rolled over from another HSA (or from an Archer MSA) is treated as established on the date the original account was opened.¹ A direct trustee-to-trustee transfer isn’t a rollover, and there’s no limit on how many of those you can make.²

Whenever you change custodians, save documentation of your original opening date. Old bills eligible under the previous custodian remain eligible under the new one, but you’re the one who has to prove it if the IRS ever asks.

The Two Other Ways an Old Bill Can Fail

Even if the expense was incurred after your HSA was opened, it still has to clear two other tests.

It wasn’t reimbursed by insurance or another source. Only your out-of-pocket portion counts. If your insurer eventually paid the claim, that portion is off the table for HSA reimbursement.

You didn’t already claim it as an itemized medical deduction. You can’t use the same expense for both a tax-free HSA distribution and a Schedule A deduction on a prior year’s return.¹

Beyond those tests, the expense has to fit the IRS definition of “medical care” under Section 213(d) of the Internal Revenue Code.³ Common qualifying costs include:

Doctor visits, copays, surgeries, lab work, and emergency room treatment
Dental cleanings, fillings, braces, eyeglasses, contact lenses, and eye exams
Prescribed drugs, insulin, and over-the-counter medications
Menstrual care products
Crutches, wheelchairs, blood sugar test kits, and breast pumps
Therapy, counseling, and psychiatric care

Over-the-counter medications and menstrual products qualify even without a prescription.¹ IRS Publication 502 has the full list.

Old Bills for a Spouse or Dependent

Your HSA can reimburse qualified medical expenses incurred by your spouse or tax dependents, not just your own.⁴ It doesn’t matter whether the spouse or dependent was covered by your high-deductible health plan. What matters is that the person was your spouse or dependent either when the service was provided or when the bill was paid.⁵

So an old dental bill for your spouse from three years ago is fair game, as long as your HSA existed at the time of the service and you were married then or when the bill was paid.

Documentation You Need to Keep

The IRS requires records proving three things about every HSA distribution: the funds went to qualified medical expenses, those expenses weren’t reimbursed from another source, and they weren’t claimed as itemized deductions.¹ Save:

Itemized receipts showing the service, date, provider, and amount
Explanation of Benefits statements from your insurer
Bank or credit card statements confirming what you paid out of pocket

You don’t send anything with your return. You produce it if the IRS audits you. The standard record retention period is three years from the date you file the return that reports the distribution.⁶ If you’re using the delayed-reimbursement strategy, that clock doesn’t start until the year you actually take the money out, so keep the receipts until then. In practice, hold onto them indefinitely. Legible digital copies are fine.

How to Reimburse Yourself

Most HSA custodians offer an online portal for distributions. Choose the reimbursement option (rather than direct payment to a provider), enter an amount that matches your documentation, and send the funds to your personal bank account. Transfers typically take two to three business days. Some custodians will also mail a check.

Your custodian won’t look at your receipts. The accuracy of every withdrawal is on you. Keep documentation organized so each distribution ties back to a specific expense.

If You Take Out Too Much by Mistake

If you withdraw more than the qualified expense, or take a distribution that turns out not to qualify, you may be able to return the money. The IRS allows repayment of a mistaken distribution (one made due to a reasonable error) no later than the due date of your return, not counting extensions, for the year you discovered the mistake.⁷ A timely repayment keeps the amount out of your income and out of reach of the 20% additional tax. Your custodian isn’t required to accept the return, so check first.

Reporting the Withdrawal on Your Taxes

Your custodian sends you Form 1099-SA reporting the total distributed from your HSA during the calendar year. The IRS gets a copy too.⁷

You then file Form 8889 with your return. That form is where you report the distribution and declare how much went to qualified medical expenses. File Form 8889 in any year you receive HSA distributions, even if you’d otherwise owe no return. If you and your spouse each have an HSA, each of you files a separate Form 8889.²

What It Costs to Get It Wrong

If a withdrawal isn’t for a qualified medical expense, the amount is added to your taxable income and hit with an additional 20% tax.³ A $1,000 non-qualified withdrawal costs you $200 in penalty plus regular income tax on the $1,000.

Three situations remove the 20% penalty, though the withdrawal is still taxable income:

Withdrawals used for qualified medical expenses stay completely tax-free at any age. The penalty and its exceptions only matter when a distribution doesn’t match a qualified expense in the first place, which is exactly the risk you run when reaching back to old bills without solid records.

1
Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans
2
Internal Revenue Service. Instructions for Form 8889 (2025)
3
Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
4
Internal Revenue Service. Distributions for Qualified Medical Expenses
5
Internal Revenue Service. Publication 502, Medical and Dental Expenses
6
Internal Revenue Service. How Long Should I Keep Records?
7
Internal Revenue Service. Instructions for Forms 1099-SA and 5498-SA (12/2026)