Inherited HSA Rules: Spouse, Non-Spouse, and Estate Beneficiaries

Inherited HSA rules split sharply along one line: a surviving spouse named as beneficiary can take over the account and keep every tax advantage, while any other beneficiary owes ordinary income tax on the account’s full fair market value as of the date of death, in a single tax year. The beneficiary designation on file with the custodian decides which track applies.¹

If You Are the Surviving Spouse

A surviving spouse named as the designated beneficiary gets the best possible outcome. The HSA simply becomes the spouse’s own account. No taxable event is triggered by the transfer, the balance keeps growing tax-free, and withdrawals for qualified medical expenses stay tax-free just as they were during the original owner’s lifetime.¹

You can keep the inherited account as-is or roll the funds into an HSA you already own. Either way, you step into the original owner’s shoes. That includes the ability to use the funds tax-free to pay qualified medical expenses the decedent incurred before death, at any age.²

Withdrawals for anything other than qualified medical expenses before you turn 65 are hit with ordinary income tax plus a 20% penalty. After 65, the penalty disappears, but income tax still applies to non-medical withdrawals.²

Because the inherited HSA is now your own account, you can keep making contributions, but only if you independently meet the eligibility requirements. You have to be covered by a qualifying high-deductible health plan and not enrolled in Medicare. The 2026 contribution limits are $4,400 for self-only coverage and $8,750 for family coverage, with an extra $1,000 catch-up allowed at age 55 or older.³

Once you enroll in Medicare, the contribution limit drops to zero. You can still spend the inherited balance tax-free on qualified medical expenses, including Medicare premiums in many cases, but no new money can go in.² For a younger surviving spouse with HDHP coverage, that means years of continued tax-free growth. For a spouse already on Medicare, the account becomes a spend-down vehicle for medical costs.

If You Are Not the Spouse

The rules for a child, sibling, parent, friend, or any other individual beneficiary are blunt. The account stops being an HSA on the date of the owner’s death, and its entire fair market value on that date is included in your gross income for the year the owner died.¹

There is no way to stretch this over several years, roll it into your own HSA, or defer it. The full value hits your return in a single year. For a well-funded HSA, that lump sum can push you into a higher bracket and inflate your adjusted gross income enough to trigger side effects: higher Medicare Part B premiums, reduced eligibility for income-based tax credits, and increased taxation of Social Security benefits if you are already collecting.

One consolation. The distribution is not subject to the 20% penalty that normally applies to non-medical HSA withdrawals. The penalty is waived because the distribution is triggered by death.²

The One-Year Window for the Decedent’s Medical Bills

Non-spouse beneficiaries get one break worth acting on quickly. The taxable amount is reduced, dollar for dollar, by any of the decedent’s qualified medical expenses that you pay within one year after the date of death.¹ If the decedent left $12,000 in unpaid hospital bills and you pay them from the inherited HSA within that window, $12,000 comes off the taxable amount.

The deadline is absolute. Expenses paid one day past the one-year mark do not reduce the taxable income. Gather outstanding invoices right away and keep every bill, explanation of benefits, and payment confirmation. The IRS requires records showing the expenses were qualified medical costs, were incurred before the owner’s death, and were not reimbursed from another source.²

The one-year clock starts on the date of death, not the date the custodian releases the funds. Custodian paperwork can take weeks or months, so file the death claim quickly to protect the window.

Post-Death Earnings

If the HSA earns interest or investment gains between the date of death and the date the funds are distributed, those earnings are also taxable. They get reported separately as other income on your return, not on Form 8889. The 1099-SA the custodian issues will show the total distribution in Box 1 and the fair market value on the date of death in Box 4. The difference between those two numbers is the post-death earnings.⁴

When the Estate Ends Up as Beneficiary

If the owner named their estate as beneficiary, or named no beneficiary at all and the custodial agreement defaults to the estate, the fair market value of the HSA goes on the decedent’s final income tax return rather than any individual beneficiary’s return.²

This is often worse than naming a non-spouse individual. The decedent’s final return may already include income earned during the year of death, so a large HSA balance stacked on top can push the return into a higher bracket. And the estate does not get the one-year reduction for paying the decedent’s medical expenses. The statute limits that benefit to individual beneficiaries other than the estate.¹

When no beneficiary is on file, the custodial agreement controls. Some agreements default to the surviving spouse first, then the estate. Others go straight to the estate. Read the agreement rather than assume.

How to Report an Inherited HSA

The custodian issues Form 1099-SA to the beneficiary. Box 1 shows the gross distribution, and Box 4 shows the fair market value on the date of death. The distribution code in Box 3 varies by beneficiary type: code 1 for a spouse, code 4 for the estate or when the distribution happens in the year of death, and code 6 for a non-spouse individual receiving the funds in a later year.⁵

A non-spouse beneficiary files Form 8889 with their Form 1040, even without any other HSA activity. Write “Death of HSA account beneficiary” across the top of Form 8889, enter your name and Social Security number, and skip Part I. Report the taxable amount in Part II.⁶ Post-death earnings (Box 1 minus Box 4) go on your return as other income, not on Form 8889.⁴

A surviving spouse who takes over the HSA has nothing special to report for the year of death, because the transfer itself is not a taxable event. Future distributions follow the normal HSA reporting rules.

The Estate Tax Deduction for Large Estates

Large HSAs create a double-tax problem. The balance is included in the decedent’s taxable estate, and then the non-spouse beneficiary pays income tax on the same money. Section 691(c) softens this by letting the beneficiary deduct the portion of federal estate tax attributable to the inherited HSA income.¹

The deduction only matters if the estate was actually large enough to owe federal estate tax, which in practice means one that exceeds the applicable exemption amount. When it does apply, it can meaningfully cut the income tax owed on the inherited HSA. IRS Publication 559 confirms that this estate tax deduction is available to non-spouse HSA beneficiaries for the amount included in their income.⁷ The deduction is not available to the estate itself when the HSA is reported on the decedent’s final return.

Planning Moves for Owners Who Are Still Alive

The gap between spousal and non-spousal treatment is wide enough to drive how any HSA owner should think about the account.

Name a beneficiary, and keep the designation current after major events like divorce or the death of the named beneficiary. Leaving it blank usually sends the balance to the estate, which loses the one-year medical expense reduction and often lands the money on a return already crowded with the decedent’s final-year income.

If there is no surviving spouse, consider naming a tax-exempt charity as beneficiary instead of an individual. Because the fair market value is includible in the beneficiary’s gross income and a 501(c)(3) pays no income tax, the full balance passes to the charity without generating tax. That is a far better result than handing a child or sibling a five-figure lump-sum tax bill.

Owners whose beneficiary will be a non-spouse should also weigh spending the HSA down during their lifetime rather than saving it for inheritance. A 401(k) or IRA can at least be stretched by a non-spouse beneficiary over ten years. An inherited HSA is taxed in full in a single year, which makes it one of the least inheritance-friendly accounts to hold in reserve.

State Tax Wrinkles

A few states, including California and New Jersey, do not fully conform to the federal tax treatment of HSAs. In those states, HSA contributions may not be deductible at the state level, and distributions, including inherited HSA distributions, may face state income tax even where the federal rules would treat them as tax-free. A beneficiary in a non-conforming state should check the state’s specific treatment before assuming a distribution that looks clean on the federal return is clean on the state return.

1
Office of the Law Revision Counsel. 26 U.S. Code 223 – Health Savings Accounts
2
Internal Revenue Service. Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans
3
Internal Revenue Service. Revenue Procedure 2025-19, HSA Inflation Adjusted Amounts for 2026
4
Internal Revenue Service. Form 1099-SA Distributions From an HSA, Archer MSA, or Medicare Advantage MSA
5
Internal Revenue Service. Instructions for Forms 1099-SA and 5498-SA
6
Internal Revenue Service. Instructions for Form 8889
7
Internal Revenue Service. Publication 559, Survivors, Executors, and Administrators