Inherited HSA After Spouse Dies: What Surviving Spouses Need to Know

The HSA is one of the few accounts that transfers to a surviving spouse entirely tax-free — if the beneficiary designation is right. Here's what happens, what you can do with it, and the Medicare timing issue that trips people up. Not tax or legal advice — your specifics matter.

What Happens to an HSA When Your Spouse Dies — Three Scenarios

The outcome depends entirely on who was named beneficiary on the HSA account. HSAs don't pass through a will; they transfer by beneficiary designation, similar to a 401(k) or IRA.

Scenario 1: You Were Named Beneficiary (Best Case)

Under IRC §223(f)(8)(B), if the surviving spouse is the designated beneficiary, the HSA is treated as if the spouse were the original account holder.¹ This means:

• No income tax due at the time of transfer
• No penalties
• The account becomes your HSA — same tax rules as if you opened it yourself
• You notify the HSA custodian (usually a bank or brokerage) with a death certificate and retitling request

This is the only type of inherited account — IRA, 401(k), annuity, or otherwise — where a surviving spouse can simply take it over as their own account with zero tax friction at the moment of transfer.

Scenario 2: A Non-Spouse Person Was Named Beneficiary

If your spouse named a child, sibling, or any non-spouse beneficiary, that person must include the full fair market value of the HSA in their gross income for the year they receive it.¹ The account loses its tax-advantaged status immediately. There's no "stretch" option as with inherited IRAs.

Scenario 3: The Estate Was Named (or No Beneficiary Designated)

If the HSA lists the estate as beneficiary — or has no beneficiary on file — the fair market value is included in your spouse's final income tax return (Form 1040) and taxed at their applicable rate. This is the worst outcome and is easily avoided by keeping beneficiary designations current.

Can You Still Contribute to the Inherited HSA?

Once the HSA is retitled in your name, it's treated as your own. Whether you can contribute more to it depends on your health insurance situation — specifically, whether you're enrolled in a qualifying high-deductible health plan (HDHP).

If You're Enrolled in an HDHP

You can contribute up to the 2026 limits:²

2026 limits per IRS Rev. Proc. 2025-19. HDHP minimum deductible: $1,700 self-only / $3,400 family. Out-of-pocket maximum: $8,500 self-only / $17,000 family.

Note: the catch-up contribution is per person, and it applies to the account holder's age — your age, now that you own the account.

OBBBA Expansion: More Plans Now Qualify for HSA Contributions (2026)

The One Big Beautiful Bill Act (OBBBA, July 2025) expanded which health plans allow HSA contributions. Starting January 1, 2026, bronze and catastrophic plans available through an ACA Exchange are treated as HSA-compatible, even if they don't meet the traditional HDHP definition.³ This matters if you're shopping for coverage after losing your spouse's employer plan — a bronze or catastrophic ACA plan can now let you keep contributing to your HSA.

OBBBA also permanently allows HSA contributions while using telehealth services before meeting the deductible, and allows HSA funds to be used for direct primary care (DPC) fees.³

If You're Not Enrolled in a Qualifying HDHP

You can still use the existing balance for qualified medical expenses tax-free. You just can't add new contributions. The balance stays invested and grows tax-free. Many widows are in this situation — they inherit an HSA but are on Medicare or a non-HDHP plan — and they can still draw down the balance for medical costs for years.

Medicare and the HSA Contribution Cutoff

This is the most commonly missed rule: you cannot contribute to an HSA once you are enrolled in Medicare Part A, even if you still have an HDHP. Medicare enrollment is a disqualifying event for new contributions.

Medicare Part A enrollment typically happens automatically at 65 if you're receiving Social Security benefits. If you delayed Social Security past 65, you chose when to enroll in Medicare — but there's a trap:

• If you claim Social Security benefits after age 65, Medicare Part A coverage is retroactively backdated up to 6 months before your claim date. That means HSA contributions you made during those 6 months become excess contributions — subject to a 6% excise tax each year they remain in the account.
• If you're approaching 65 and still working with HDHP coverage through your own employer, you may be able to delay Medicare enrollment and keep contributing. But if you were covered under your spouse's employer plan and your spouse has died, that special enrollment exception no longer applies to you.

The practical rule: once you're on Medicare Part A, stop contributing but continue using the existing balance freely for medical expenses.

The Last-Month Rule (the Year You Enroll)

In the calendar year you enroll in Medicare, you can contribute on a pro-rata basis for the months you were HSA-eligible (not yet enrolled). If you enrolled in Medicare on July 1, you can contribute 6/12 of the annual limit. The HSA administrator won't track this automatically — you're responsible for staying within the pro-rated amount.

Three Ways to Use Your Inherited HSA

1. Tax-Free Withdrawals for Qualified Medical Expenses (Any Age)

This is the primary use case. Qualified expenses include Medicare Part B and Part D premiums, Medicare Advantage premiums, dental, vision, long-term care insurance premiums (within IRS limits by age), and most out-of-pocket medical costs. The distribution is never taxable when used for qualified expenses.

Notably, HSA distributions for medical expenses don't count toward your MAGI — so they don't affect your IRMAA tier or the taxation of your Social Security benefits. For widows managing income near the $109,000 IRMAA threshold for single filers, paying large medical bills from the HSA rather than from an IRA can keep you in the lower Medicare premium tier.

2. After Age 65: Flexible Spending for Any Purpose

Once you're 65, the 20% penalty for non-medical withdrawals disappears. You pay ordinary income tax on non-medical distributions — the same treatment as a traditional IRA. This means an HSA you've been building for years becomes a second tax-deferred retirement account usable for anything once you reach 65. If you inherited a large HSA from your spouse, you may have a meaningful reservoir of tax-deferred savings to draw from strategically.

3. Reimbursing Old Unreimbursed Medical Expenses

There's no deadline to reimburse yourself for qualified medical expenses paid out of pocket in the past — as long as the expense occurred after the HSA was established and you kept the receipts. If your spouse had an HSA for years and you paid medical bills from other accounts, you (as the new owner) can reimburse yourself from the HSA tax-free now. This is a legitimate and often overlooked strategy.

IRMAA and the Widow's HSA Strategy

Once you're widowed, the IRMAA threshold for Medicare drops from $218,000 (married filing jointly) to $109,000 (single filer). If your income is near that line — from Social Security, RMDs, pension income, or investment withdrawals — the HSA becomes a useful tool:

• Use HSA funds for medical bills instead of IRA withdrawals. HSA distributions don't count as MAGI; IRA withdrawals do.
• If you need $15,000 for dental work or a procedure, taking it from the HSA instead of your IRA keeps that $15,000 off your MAGI, potentially keeping you below the IRMAA threshold and saving hundreds per month in Medicare premiums.

For a detailed walk-through of IRMAA brackets and the SSA-44 appeal process, see IRMAA Appeal After Spouse Dies.

Update Your Own HSA Beneficiary Designation Now

Now that you've inherited your spouse's HSA and it's your own account, you need a new beneficiary designation on it. If you die without naming a beneficiary (or your estate is named), the full balance will be taxable on your final return — losing all remaining tax advantage. Options:

• Name an adult child or other individual — they'll owe income tax on the full balance in the year they receive it, but at least the estate administration delay is avoided
• Name a trust — complex but possible; requires the trust to be drafted for HSA compatibility
• Consider spending down the HSA during your lifetime for medical expenses, which is the cleanest exit — every dollar used for qualified expenses exits the account tax-free, permanently

Common Mistakes Widows Make with an Inherited HSA

Sources

1. IRC §223(f)(8) — Health Savings Accounts: Death of Account Beneficiary. §223(f)(8)(B): "If the surviving spouse is the designated beneficiary of a health savings account, such account shall be treated as if the spouse were the account beneficiary." §223(f)(8)(A): Non-spouse beneficiary must include fair market value in gross income. Via Cornell LII.
2. IRS Rev. Proc. 2025-19 — 2026 HSA Contribution Limits. Self-only HDHP: $4,400. Family HDHP: $8,750. Age-55+ catch-up: $1,000. HDHP minimum deductible: $1,700 self-only / $3,400 family. Out-of-pocket maximum: $8,500 self-only / $17,000 family.
3. IRS Notice 2026-05 — OBBBA HSA Expansions. As of January 1, 2026, bronze and catastrophic ACA Exchange plans treated as HSA-compatible. Telehealth before HDHP deductible made permanent. Direct primary care fees payable from HSA.
4. IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans (2025). Comprehensive HSA eligibility, contribution, and distribution rules including Medicare interaction, qualified medical expenses, and beneficiary rules.

HSA contribution limits and HDHP thresholds verified against IRS Rev. Proc. 2025-19 for 2026. OBBBA HSA expansions effective January 1, 2026 per IRS Notice 2026-05. IRC §223(f)(8) beneficiary rules from Cornell LII and IRS Pub. 969. Values verified May 2026.