The HSA as a long-term account

Most people meet the Health Savings Account (HSA) as a line on their benefits form. It looks like a way to pay the deductible. It can be that. But the rules also let an HSA work as a long-term account, one of the few that can be tax-free going in, while it grows, and coming out.

That makes it worth understanding properly, especially if you're planning years of self-paid health care before Medicare.

This is general education, not advice. HSA rules are detailed, and state tax treatment can differ from federal. Please check IRS Publication 969, your plan documents, or a tax professional before relying on any of this.

Who can have one

To contribute, you must be an eligible individual. Publication 969 sets out the main conditions:

• You're covered by an HDHP on the first day of the month.
• You have no other health coverage, except types the rules allow (such as dental, vision or certain specific coverage).
• You're not enrolled in Medicare.
• You can't be claimed as a dependent on someone else's tax return.

For 2026, an HDHP must have a deductible of at least $1,700 (self-only) or $3,400 (family), and out-of-pocket costs, not counting premiums, of no more than $8,500 or $17,000 (IRS Rev. Proc. 2025-19).

New for 2026: qualifying bronze and catastrophic plans bought on the individual market are treated as HDHPs for HSA purposes, even if they don't meet the usual deductible and out-of-pocket rules (IRS Notice 2026-05). That matters to early retirees buying their own coverage: a bronze marketplace plan can now pair with an HSA. The other eligibility rules still apply.

The 2026 limits

• Self-only coverage: $4,400.
• Family coverage: $8,750.
• Age 55 or older by year-end: an extra $1,000. If both spouses are 55+, each puts their catch-up in their own HSA (IRS Publication 969).

These are full-year figures, and they include anything your employer puts in. If you're eligible for only part of the year, your limit is generally lower. One exception is the last-month rule: if you're eligible on December 1, you can generally contribute the full year's amount, but only if you stay eligible through a testing period that runs to the end of the following year. If you stop being eligible during that period for a reason other than death or disability, the contributions you could make only because of the last-month rule become taxable income, plus a 10% additional tax (Publication 969).

You can make contributions for a tax year until the tax filing deadline the following April (Publication 969).

The triple tax advantage

Publication 969 describes three federal benefits:

1. Going in. Contributions you make are deductible, even if you don't itemize. Contributions through payroll at work are generally excluded from your income.
2. While it grows. Interest and investment earnings inside the HSA aren't taxed.
3. Coming out. Distributions used for qualified medical expenses aren't taxed.

A traditional 401(k) generally gets pre-tax contributions and tax-deferred growth, but withdrawals are generally taxed (IRS). A Roth gets the last two. An HSA used for medical costs gets all three.

A note on states: some states don't follow the federal treatment of HSAs. Check your state's rules.

Using it as a long-term account

Many HSA providers let you invest the balance in funds once it's above a set amount. Options and fees vary a lot by provider; compare them the same way you'd compare a 401(k)'s menu (see Index investing basics). Investments can lose value.

Some people use their HSA like this:

• Pay current medical bills from cash while working, if they can afford to.
• Leave the HSA invested for years.
• Keep every receipt.
• Reimburse themselves later, for example in early retirement, when tax-free cash is especially useful.

The receipt rules

This works only within the IRS rules (Publication 969):

• The expense must have been incurred after your HSA was established. Bills from before you opened it don't count.
• It must not have been paid or reimbursed by insurance or another source.
• It must not have been taken as an itemized deduction.
• You must keep records showing that distributions were for qualified medical expenses.

Many people keep a simple folder or spreadsheet: date, provider, amount, what insurance paid, and a scan of the receipt and explanation of benefits.

What counts as a qualified medical expense

Broadly, costs for diagnosis, treatment and prevention of disease, as listed in IRS Publication 502. Health insurance premiums usually don't count, but Publication 969 lists exceptions that matter to early retirees:

• COBRA continuation coverage.
• Health coverage while you're receiving unemployment compensation.
• Long-term care insurance (subject to limits).
• Medicare and other health coverage once you're 65 or older, but not Medigap (Medicare supplement) premiums.

Marketplace premiums while you're under 65 and not on unemployment generally aren't on the list.

Non-medical withdrawals, before and after 65

If you take money out for something other than qualified medical expenses, it's added to your income. Before 65, there's also a 20% additional tax. That additional tax doesn't apply after you turn 65, become disabled, or die (Publication 969).

So after 65, money in an HSA spent on non-medical things is taxed much like a traditional IRA withdrawal, while money spent on medical costs stays tax-free. That flexibility is part of why people treat it as a long-term account.

Medicare ends contributions, not the account

Once you're enrolled in Medicare, you can no longer contribute (Publication 969). If you sign up for Medicare, or apply for Social Security or Railroad Retirement benefits, more than six months after turning 65, Part A coverage can be backdated up to six months. So Medicare.gov suggests stopping HSA contributions six months before you retire or apply for benefits (Medicare.gov). Money already in the HSA can still be used, including for Medicare Part B and Part D premiums. More in Medicare in plain English.

Who inherits it

If your spouse is the named beneficiary, the account is treated as their HSA after your death. If someone else inherits it, it stops being an HSA and its value is generally taxable to them in the year you die (Publication 969). Keep your beneficiary form up to date.

Is it worth it?

It depends on your health, your cash flow and the plans you can choose from. An HDHP means paying more out of pocket before insurance kicks in, and that cost is real. For some households a lower-deductible plan is simply the better fit. The HSA's value is greatest for people who can cover the deductible from cash and leave the account to grow.

Next step

Add realistic health costs to your yearly spending, including the years before Medicare, and see how they change your number.

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Related: Health insurance before Medicare and Getting to your money before 59½.