HSA Rules for Married Couples: Family Limit, Catch-Ups, and Medicare

HSA rules for married couples turn on one central fact: no matter how many accounts you hold between you, you share a single family contribution ceiling. In 2026 that ceiling is $8,750 if either spouse has family High Deductible Health Plan coverage.¹ Each spouse who is 55 or older can add another $1,000 catch-up on top, but that catch-up has to sit in that spouse’s own HSA. Eligibility, Medicare, and the way you file all add complications that catch couples off guard.

The 2026 Numbers

HSA contribution limit, self-only coverage: $4,400
HSA contribution limit, family coverage: $8,750
Catch-up contribution, age 55 and older: $1,000 per eligible spouse
HDHP minimum deductible: $1,700 self-only, $3,400 family
HDHP maximum out-of-pocket: $8,500 self-only, $17,000 family

These come from Rev. Proc. 2025-19 and IRS Notice 2026-05.¹ Starting in 2026, bronze and catastrophic plans bought through a health insurance Exchange also qualify as HDHPs even if they don’t meet the standard deductible thresholds, a change from the One, Big, Beautiful Bill Act.²

How the Family Limit Is Split Between Spouses

If either spouse has family HDHP coverage, both spouses are treated as having family coverage for contribution purposes. You can’t stack a self-only limit on top of a family limit. The $8,750 is the total for both of you, including any employer contributions.³

How you divide that $8,750 between two accounts is up to you. The default IRS rule is an equal split, but you can agree to any allocation, including putting the whole amount in one spouse’s HSA and nothing in the other’s.⁴ If each spouse has family coverage under a different HDHP, the couple is treated as having the plan with the lowest annual deductible, and the same combined $8,750 ceiling applies.⁵

One spouse holding self-only coverage while the other has family coverage catches people. Because the family plan already covers at least one other person, the IRS disregards the self-only plan entirely and applies only the family contribution limit to the couple’s combined contributions.⁴

How One Spouse’s Coverage Can Break the Other’s Eligibility

To contribute for a given month, you have to be enrolled in an HDHP on the first day of that month, not enrolled in Medicare, not a dependent on someone else’s return, and not covered by another health plan that isn’t an HDHP.⁶

That last piece is where marriage matters. If your spouse has a traditional health care Flexible Spending Arrangement through their employer, that FSA can pay medical expenses below your HDHP deductible. The IRS treats that as first-dollar coverage and it disqualifies both of you from HSA contributions, even if you’re personally enrolled in a qualifying HDHP.⁶

A Limited Purpose FSA fixes this. It only covers dental and vision, so it doesn’t reimburse general medical costs below your deductible and doesn’t count as disqualifying coverage. If your spouse’s employer offers one, switching from a general FSA to a Limited Purpose FSA preserves HSA eligibility for both of you. A Dependent Care FSA, which covers childcare rather than medical costs, also doesn’t disqualify either spouse.

Catch-Up Contributions Stay in Each Spouse’s Own Account

The $1,000 catch-up for age 55 and older is the one piece that isn’t shared. Each spouse who’s at least 55 and not yet on Medicare can contribute an extra $1,000 to their own HSA, on top of the $8,750 family limit.³ Both spouses eligible? The household can contribute $10,750 total in 2026.

The catch: catch-up contributions must go into the account of the spouse they belong to. You can’t route both catch-ups into a single HSA. If only one of you currently has an account, the other has to open their own to receive their catch-up. A proposal to allow spousal catch-up deposits into a single HSA was considered during the One, Big, Beautiful Bill Act negotiations but didn’t make it into the final law.

When One Spouse Enrolls in Medicare

Enrolling in any part of Medicare, Part A alone included, ends your ability to contribute to an HSA. The One, Big, Beautiful Bill Act did not change this.⁶ Your spouse’s eligibility isn’t destroyed by that, though. If you go on Medicare and your spouse stays on a family HDHP, they can still contribute up to the full $8,750 family limit into their own HSA, plus their own $1,000 catch-up if they’re 55 or older. The limit tracks the coverage in place, not the number of HSA-eligible people in the household.

Watch the six-month retroactive enrollment rule. When you sign up for Medicare Part A after turning 65, coverage backdates up to six months (but not before your 65th birthday). Any HSA contributions made during those retroactive months become excess contributions. If you’re delaying Medicare so you can keep contributing, stop contributions at least six months before your Medicare enrollment date. Enrolling in Social Security benefits also triggers automatic Medicare Part A enrollment, which catches people who didn’t realize the two were linked.

Using HSA Funds for Your Spouse’s Medical Expenses

Contribution rules and spending rules are separate systems, and this is the good news for couples. You can withdraw funds tax-free from your HSA to pay for your spouse’s qualified medical expenses whether or not your spouse has HDHP coverage, is on Medicare, or has any insurance at all.⁵

Qualified medical expenses cover diagnosis, treatment, or prevention of disease, including deductibles, copayments, prescriptions, dental, and vision.⁷ Health insurance premiums generally don’t count, but there are exceptions worth knowing: Medicare premiums (Parts A, B, C, and D), COBRA continuation coverage, and health coverage while receiving unemployment benefits can all be paid from an HSA tax-free.³

You can also use your HSA for the qualified medical expenses of any dependent you claim on your tax return. Adult children who are no longer your tax dependents don’t qualify, though, even if they’re still on your health plan through age 26. The health insurance rule and the HSA spending rule use different definitions of dependent.

Divorce, Death, and Beneficiary Rules

After a divorce is final, your former spouse is no longer your spouse for HSA purposes. You can’t use your HSA funds tax-free for a former spouse’s medical expenses. You can still use it for the qualified medical expenses of any dependent children you claim, regardless of custody.⁵

Transferring HSA funds to a spouse or former spouse under a divorce or separation agreement isn’t a taxable event. The receiving spouse becomes the account beneficiary and the funds keep their HSA status.⁵ The agreement should spell out how existing balances are divided, the same as any other financial account.

Beneficiary designation matters even more at death. If the HSA owner dies and the designated beneficiary is the surviving spouse, the account simply becomes that spouse’s HSA. No taxable event, no forced distribution, no change to how the money can be spent. Any other beneficiary receives the fair market value as taxable income in the year of death, with an offset only for the deceased’s qualified medical expenses the beneficiary pays within one year of the death.³ If the estate is the beneficiary, that full value hits the decedent’s final return. Confirming your spouse is named is one of the simplest estate steps a couple can take.

Filing Form 8889 as a Married Couple

Anyone who contributed to an HSA, took a distribution, or has a testing period issue files IRS Form 8889 with their return.⁸ Filing jointly does not merge the forms. Each spouse with an HSA completes a separate Form 8889. The deduction amounts from both forms then combine and flow to Schedule 1.⁴

Each form reports that spouse’s contributions, the portion of the family limit allocated to them, and any distributions received. If either spouse took distributions during the year, the custodian issues a Form 1099-SA that carries over to Form 8889.⁸ Couples filing separately follow the same process but need to document the allocation carefully. The IRS applies the combined family cap regardless of filing status, so if both spouses claim more than their share, the excess will surface.⁴

Fixing Excess Contributions

Excess contributions happen when a couple’s combined deposits, including employer contributions, exceed the $8,750 family cap, or when one spouse loses eligibility and prior contributions become invalid. Leaving the excess in the account triggers a 6% excise tax every year it stays there.⁹

To stop that clock, contact your HSA custodian and request a return of excess contribution before your tax filing deadline, including extensions. The custodian withdraws the excess plus any earnings attributable to it. You’ll owe income tax on the earnings, but the 6% penalty won’t keep compounding. You can also apply the excess toward the following year’s limit if there’s room, though the 6% tax still applies for the year the excess existed.

A Note on State Taxes

Most states follow the federal tax treatment of HSAs, so contributions are deductible and growth is tax-free at the state level too. California and New Jersey are the exceptions: both treat HSA contributions as taxable income and tax interest and investment gains inside the account each year. If either spouse lives or works in one of those states, the federal benefits still apply, but the state-level savings other residents get don’t.

1
IRS.gov. Rev. Proc. 2025-19
2
Internal Revenue Service. Treasury, IRS Provide Guidance on New Tax Benefits for Health Savings Account Participants Under the One Big Beautiful Bill
3
Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
4
Internal Revenue Service. Instructions for Form 8889
5
Office of the Law Revision Counsel. 26 U.S. Code 223 – Health Savings Accounts
6
Internal Revenue Service. Individuals Who Qualify for an HSA – IRS Courseware
7
Internal Revenue Service. Publication 502 – Medical and Dental Expenses
8
Internal Revenue Service. Instructions for Form 8889
9
Office of the Law Revision Counsel. 26 U.S. Code 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities