What Happens to My HSA If I No Longer Have an HDHP?

If you no longer have an HDHP, your HSA stays open, every dollar in it remains yours, and the tax advantages on that money don’t go away. You can still withdraw funds tax-free for qualified medical expenses for the rest of your life, and any invested balance keeps growing tax-free. The one thing that changes is contributions: you can’t add new money until you’re covered by a qualifying high deductible health plan again.

Your Balance Keeps Its Tax Treatment

Losing HDHP coverage has no effect on money already in the account. You can spend it tax-free on qualified medical costs whether you’re on a PPO, an HMO, Medicare, or no coverage at all.¹ The HSA doesn’t convert to another kind of account, doesn’t freeze, and doesn’t lose its status because your insurance changed.

Invested funds stay invested. If your custodian offers mutual funds, index funds, or other options and you’ve been using them, you can keep buying, selling, and rebalancing regardless of your insurance status. Growth remains tax-free as long as eventual withdrawals go toward medical costs.

One useful detail: there’s no deadline for reimbursing yourself. If you paid a medical bill out of pocket years ago while you had an active HSA, you can pull money out today to reimburse that expense tax-free. The only requirement is that the expense was incurred after you first opened the HSA.¹ Keep the receipts and explanation-of-benefits statements, because the burden of proving a withdrawal was qualified falls on you if the IRS ever asks.

You Can No Longer Contribute

To put new money into an HSA you must be covered by a qualifying HDHP on the first day of the month and have no disqualifying coverage such as a general-purpose flexible spending account.¹ The moment you drop HDHP coverage, your contribution eligibility ends on the first day of the following month. Drop the plan on June 15 and July is the first month you can’t contribute.

Prorating Your Annual Limit

The 2026 annual HSA contribution limit is $4,400 for self-only coverage and $8,750 for family coverage, with an extra $1,000 catch-up if you’re 55 or older.² When you lose HDHP coverage mid-year, you don’t get the full amount. Divide the annual limit by 12 and multiply by the number of months you were eligible.³

If you had self-only HDHP coverage from January through June 2026, your prorated limit is $2,200 ($4,400 × 6 ÷ 12). Anything above that becomes an excess contribution that needs correcting.

The Last-Month Rule and Its Trap

There is one exception to proration. If you’re covered by an HDHP on December 1, you can contribute the full annual limit for that year even if you only had HDHP coverage for a few months.¹ The catch: you have to keep HDHP coverage through a testing period running to December 31 of the following year.

If you fail to stay on an HDHP during that testing period, for any reason other than death or disability, the amount you contributed above your prorated share gets added to your taxable income, plus a 10% additional tax.¹ So if you used the last-month rule for the year you lost coverage, or the year before, check the math carefully.

Fixing Excess Contributions

If you contributed more than your prorated limit before your HDHP coverage ended, withdraw the excess plus any earnings on it before your tax filing deadline, including extensions.⁴ The withdrawn earnings get reported as other income, but you avoid further penalties.

Miss the deadline and a 6% excise tax hits the excess amount every year it stays in the account, reported on Form 5329.¹ People who forget to correct an accidental over-contribution can pay years of penalties on the same dollars.

What You Can Still Spend the Balance On

Qualified medical expenses cover a wide range: doctor visits, hospital bills, prescription drugs, dental work, vision care, mental health treatment, chiropractic care, hearing aids, and medical equipment.⁵ Over-the-counter medications qualify without a prescription, and menstrual products count as well.⁶

HSA funds can also pay for a narrow list of insurance premiums. That list is important when you’ve just lost HDHP coverage:

COBRA continuation premiums
Health coverage premiums while you’re receiving unemployment compensation
Long-term care insurance premiums, up to age-based annual limits (from $500 at age 40 and under to $6,200 for those over 70 in 2026)
Medicare premiums (Part A, B, C, and D) once you’re 65 or older

You still can’t use HSA money to pay premiums on a regular health insurance policy or a Medicare supplemental (Medigap) plan.¹

Non-Medical Withdrawals Get Expensive

Pulling HSA money out for anything other than qualified medical expenses triggers two costs. The full amount gets added to your taxable income at your regular rate, and a 20% additional penalty applies on top of that.¹ A $1,000 non-medical withdrawal can easily cost $400 or more in combined taxes and penalties for someone in the 22% bracket.

The 20% penalty drops away once you turn 65 or become disabled. After that, non-medical withdrawals are taxed as ordinary income with no extra penalty, similar to a traditional IRA. Qualified medical withdrawals remain tax-free at any age.¹

If Medicare Is Why You Lost HDHP Eligibility

Enrolling in any part of Medicare, whether Part A, B, C, or D, ends your HSA contribution eligibility.³ The existing balance is untouched, and you can spend it tax-free on Medicare premiums, deductibles, and copays as you go.

Watch out for retroactive Part A enrollment. If you apply for Medicare after age 65, Part A coverage is typically backdated up to six months before your application. Any HSA contributions made during those backdated months become excess contributions. The safe move is to stop contributing at least six months before you plan to enroll.

Account Fees and Moving the Money

When your HSA was tied to your employer’s HDHP, your employer may have been absorbing the monthly maintenance fee. Once that connection breaks, the custodian often starts charging you directly. Monthly fees typically run under $5, and many custodians waive them at a minimum balance somewhere between $1,000 and $5,000.

If the fees are eating into a modest balance, you can move the money. A direct trustee-to-trustee transfer shifts funds to a different HSA custodian with no tax consequences and no limit on how often you can do it, though the outgoing custodian may charge a transfer fee of $20 to $50. An indirect rollover, where you withdraw the funds yourself and redeposit them at a new HSA within 60 days, is limited to one per 12-month period.

Getting Back on an HDHP Later

If you re-enroll in a qualifying HDHP at a new job, during open enrollment, or through the marketplace, you can start contributing again right away. There’s no waiting period.³ Your contribution limit for the year prorates based on the number of months of HDHP coverage, unless you’re eligible on December 1 and want to use the last-month rule (with its testing-period strings attached).

You can contribute to your existing HSA or open a new one. There’s no cap on how many HSAs you can own, but total contributions across all of them can’t exceed the annual limit for your coverage type.

Check Your Beneficiary Designation

Who inherits your HSA matters more than most people think. A surviving spouse takes over the account as their own; it keeps HSA status and stays tax-advantaged. A non-spouse beneficiary, such as a child or sibling, is treated very differently: the account stops being an HSA the day you die, and the full fair market value becomes taxable income to that beneficiary in the year of death, reduced only by any of your outstanding medical expenses they pay within a year.¹ If your estate is named, the fair market value goes on your final income tax return.⁷ A change in health coverage is a good moment to review the designation on file.

1
Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans
2
Internal Revenue Service. Revenue Procedure 2025-19
3
Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
4
Internal Revenue Service. Instructions for Form 8889
5
Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
6
Internal Revenue Service. IRS Outlines Changes to Health Care Spending Available Under CARES Act
7
Internal Revenue Service. Form 1099-SA Distributions From an HSA, Archer MSA, or Medicare Advantage MSA