Health Savings Accounts Explained: 2026 Rules, Limits and Uses

A health savings account (HSA) is a tax-favored account you can use for medical costs, but only if you are covered by a qualifying high deductible health plan (HDHP), have no other disqualifying coverage, are not enrolled in Medicare and cannot be claimed as someone else's dependent ^[1]. For 2026, an HDHP's deductible can be no lower than $1,700 for one person or $3,400 for a family, and you can contribute up to $4,400 (self-only) or $8,750 (family) ^[2]. Money goes in tax-free, grows tax-free, and comes out tax-free for qualified medical expenses ^[1]. This guide covers who qualifies, the 2026 and 2027 limits, what you can spend it on, investing the balance and what changes at 65.

Who can open and fund an HSA

You are an eligible individual for a given month if all of these are true on the first day of that month ^[1]:

1. You are covered by an HDHP.
2. You have no other health coverage, apart from types the rules allow.
3. You are not enrolled in Medicare.
4. No one else can claim you as a dependent.

Allowed extra coverage. You can still contribute if you also have coverage for accidents, disability, dental, vision, long-term care, or telehealth and other remote care ^[1]. Insurance for a specific disease or a fixed amount per day of hospital stay is also allowed ^[1].

Coverage that usually disqualifies you. A general-purpose health flexible spending account (FSA) or health reimbursement arrangement (HRA) from your job, including your spouse's if it covers you, generally blocks HSA contributions. A limited-purpose FSA or HRA, which pays only for items such as dental and vision, does not ^[1].

No income limit. There is no income test for an HSA, and you do not need earned income to contribute ^[3].

One account per person. Spouses cannot share a joint HSA. Each eligible spouse opens their own ^[1].

What counts as an HDHP in 2026

An HDHP has a higher deductible than a typical plan and a cap on what you pay out of pocket each year. For 2026, the numbers are ^[2]:

An HDHP can still cover preventive care, such as annual physicals, screenings and immunizations, before you meet the deductible ^[1].

Watch family plans with an embedded per-person deductible. If the deductible for one family member is below the family minimum ($3,400 for 2026), the plan is not an HDHP ^[1].

What the 2025 tax law changed

The 2025 law known as the One, Big, Beautiful Bill (Public Law 119-21) widened HSA eligibility in three ways ^[4]:

• Telehealth. You can get telehealth and other remote care before meeting the deductible and still keep HSA eligibility. This is now permanent, for plan years starting on or after January 1, 2025.
• Bronze and catastrophic plans. Starting January 1, 2026, bronze and catastrophic plans offered through an Exchange count as HSA-compatible, even if they do not meet the usual HDHP numbers. IRS guidance says they do not have to be bought through an Exchange to qualify.
• Direct primary care. Starting January 1, 2026, people in certain direct primary care arrangements can still contribute, and they can pay the periodic fees from the HSA tax-free.

For the direct primary care rule, the total monthly fees cannot exceed $150 for one person or $300 for an arrangement covering more than one person ^[5]. Before this law, many bronze plans failed the HDHP test because their out-of-pocket limits were too high or they covered non-preventive care before the deductible ^[6].

2026 and 2027 contribution limits

Key rules for these limits:

• Everything counts. The limit covers your contributions, your employer's and anyone else's. Employer contributions reduce what you can add yourself ^[1].
• Catch-up at 55. If you are 55 or older by the end of the year, you can add $1,000 more ^[1]. If both spouses are 55 or older, each puts their own $1,000 in their own HSA ^[1].
• Married couples. If either spouse has family HDHP coverage, both are treated as having family coverage. The family limit is split equally unless you agree on a different split ^[1].
• Part-year eligibility. If you were eligible for only part of the year, your limit is generally prorated by month, but the "last-month rule" lets you contribute the full amount if you are eligible on December 1. In that case, you must stay eligible through the end of the following year, or part of the contribution becomes taxable ^[1].
• Too much in? Pull out excess contributions and their earnings by your tax return due date, including extensions, to avoid an additional tax ^[1].

Example. Elena, 41, has self-only HDHP coverage all of 2026. Her employer puts in $1,000. She can add up to $3,400 more ($4,400 − $1,000). If she were 56, she could add $4,400 ($4,400 + $1,000 catch-up − $1,000 from her employer).

The triple tax advantage

An HSA gives three federal tax breaks ^[1]:

1. Going in. You deduct your own contributions even if you do not itemize. Employer contributions, including those you make through a cafeteria plan at work, can be left out of your income.
2. Growing. Interest and other earnings in the account are not taxed.
3. Coming out. Distributions used for qualified medical expenses are tax-free.

Payroll contributions have a fourth benefit. When your employer contributes cash to your HSA through payroll, including through a cafeteria plan, those amounts are generally exempt from federal income tax withholding and from Social Security and Medicare taxes ^[3].

Example. A family in the 22% federal bracket puts $8,750 into an HSA through payroll in 2026. They avoid about $1,925 of federal income tax (22% × $8,750). Because the deposits go in through payroll, that $8,750 also escapes Social Security and Medicare taxes ^[3]. Their state may add to or reduce this benefit.

State taxes. Most states follow the federal treatment, but California and New Jersey do not give a state tax break on HSA deposits ^[7].

What you can spend HSA money on

Qualified medical expenses are costs of medical care as the tax code defines it, for you, your spouse and your dependents, to the extent insurance or another source does not pay them ^[1]. Medical care covers costs to diagnose, treat or prevent disease or to affect a body function, and not things that are just good for general health, such as vitamins or a vacation ^[8].

Common qualified uses include deductibles, copays, prescriptions, dental and vision care. Since 2020, over-the-counter medicines and menstrual products also qualify ^[7][1].

Insurance premiums are mostly excluded. You can use HSA money only for these premiums ^[1]:

• Long-term care insurance, within limits
• COBRA continuation coverage
• Health coverage while you receive unemployment compensation
• Medicare and other health coverage once you are 65 or older, except Medigap supplemental policies

Timing rule. Expenses from before you opened your HSA do not qualify ^[1]. Once the account is open, there is no deadline to pay yourself back for a qualified expense ^[9].

Non-medical withdrawals. Money taken out for other purposes is taxable income and, before 65, generally faces an additional 20% tax ^[1].

Keep records. You must be able to show that each distribution paid for a qualified expense that was not reimbursed elsewhere or deducted on your return. You keep these records yourself; you do not send them with your return ^[1].

Investing your HSA balance

Unused money carries over from year to year, and the account stays with you if you change jobs or stop working ^[1]. That is a key difference from a health FSA, which is generally "use it or lose it" ^[9]. Many HSA providers let you invest part of the balance in funds, and some require a minimum cash amount first ^[9]. Providers differ a lot in investment choices and fees, so compare before you pick one ^[7].

A common approach is to keep enough in cash to cover your deductible and invest the rest for later. Some people pay current medical bills from other money, keep the receipts, and let the HSA grow, reimbursing themselves years later ^[9]. That only works if you keep careful records proving the expense and that you paid it out of pocket ^[7]. Fidelity estimates that a 65-year-old may need $185,500 in after-tax savings for health costs in retirement, which is one reason people treat an HSA as a long-term account ^[9]. Investments can lose value, so money you will need soon is better kept in cash.

Example. Jordan keeps $2,000 in HSA cash, enough for his self-only deductible, and invests everything above that in a broad index fund. He pays a $600 urgent care bill from his checking account and saves the receipt. Ten years later, he can take $600 from the HSA tax-free for that bill.

What happens at 65

The penalty goes away. After you turn 65, the additional 20% tax on non-medical withdrawals no longer applies. Those withdrawals are still taxed as income, but medical withdrawals stay tax-free ^[1].

Premiums become eligible. You can use HSA money for Medicare premiums, other than Medigap ^[1].

Contributions stop when Medicare starts. Your contribution limit is zero starting with the first month you are enrolled in Medicare ^[1]. This includes retroactive coverage. If you sign up for premium-free Part A after 65, your coverage starts up to six months back from when you sign up, though not before the month you turned 65 ^[10]. Contributions made during those backdated months become excess contributions ^[1]. If you plan to keep working and contributing past 65, stop HSA contributions about six months before you apply for Medicare or Social Security.

Prorated final year. In the year you enroll, your limit is prorated by month. The IRS example: a person with self-only coverage who turned 65 and enrolled in July 2025 could contribute $2,650, six-twelfths of $5,300 ^[1].

When you die. If your spouse is the beneficiary, the account becomes your spouse's HSA. If anyone else inherits it, it stops being an HSA and its value becomes taxable to that person in the year of death ^[1].

Common mistakes

• Contributing while covered by a general-purpose FSA, including a spouse's ^[1].
• Contributing after Medicare starts, especially with backdated Part A ^[1][10].
• Counting only your own deposits and forgetting your employer's toward the limit ^[1].
• Paying for expenses from before the HSA was opened ^[1].
• Losing receipts you will need to prove a tax-free withdrawal years later ^[1].

When to get professional help

Talk to a tax professional if you changed coverage mid-year, used the last-month rule, made excess contributions, or are close to Medicare enrollment while still working. Your HR team can confirm whether your plan qualifies as an HDHP and whether your FSA is limited-purpose.

Your next step: find your health plan's 2026 deductible on your benefits summary and compare it with the $1,700 self-only or $3,400 family minimum. If you qualify, check how much your employer contributes and set your payroll deposit so the total stays within your 2026 limit.