A health savings account (HSA) is an account a person owns, funded while covered by a qualifying high deductible health plan, and used for qualified medical expenses. Its "triple tax" treatment is three separate rules in IRS Publication 969: contributions are deductible or excluded from income, "the interest or other earnings on the assets in the account are tax free," and "distributions may be tax free if you pay qualified medical expenses." Each layer has its own condition. A person can keep one and lose another, which is the part most explanations leave out.
This article explains how the IRS describes the tax treatment of an HSA in the United States. It is general information, not tax, investment or financial advice. It does not say whether to open an HSA, how much to contribute, or what to hold inside one. A CPA or enrolled agent is the professional for questions about your own return.
Sources read September 11, 2026. Contribution limits change every year; each figure below names its tax year and IRS document.
How does an HSA work: the basic mechanics
HealthCare.gov's glossary, read September 11, 2026, describes an HSA as "a type of savings account that lets you set aside money on a pre-tax basis to pay for qualified medical expenses." It adds that a person may contribute "only if you have an HSA-eligible plan (sometimes called a High Deductible Health Plan (HDHP))," and that "banks, credit unions, and other financial institutions offer HSAs."
Four facts from IRS Publication 969 (2025), read the same day, describe how the account behaves:
- It is owned by the individual. "An HSA is 'portable.' It stays with you if you change employers or leave the work force."
- It does not expire. "The contributions remain in your account until you use them."
- Eligibility is tested month by month. A person must be covered by an HDHP on the first day of the month, have no other disqualifying coverage, not be enrolled in Medicare and not be claimed as someone else's dependent.
- It covers the household's medical costs. Qualified medical expenses include those of "the spouse of the individual, and any dependent of the individual."
What makes a plan an HDHP is a tax test with its own figures each year. The plan design, a lower premium paired with a higher deductible, is explained in our piece on the low premium, high deductible trade-off.
The three tax layers, and the condition on each
| Layer | What Publication 969 says | The condition it depends on | What removes it |
|---|---|---|---|
| 1. Money going in | Contributions are deductible "even if you don't itemize"; employer contributions, including through a cafeteria plan, "may be excluded from your gross income" | Being an eligible individual for the months in question, within the annual limit | Months without HDHP coverage, Medicare enrollment, contributions above the limit |
| 2. Money inside | "The interest or other earnings on the assets in the account are tax free" | The account being an HSA | Nothing in normal use; the layer applies while money stays in the account |
| 3. Money coming out | "Distributions may be tax free if you pay qualified medical expenses" | What the money is spent on | A distribution for something that is not a qualified medical expense |
The key point for the reader: layer 1 depends on who you are this month, layer 3 depends on what you spend it on, and they are tested separately. A person who loses HDHP coverage loses the ability to contribute, but money already in the account keeps its other two layers. A person who spends on a non-qualified expense loses layer 3 for that withdrawal, and nothing about their eligibility changes.
Layer 1: contributions, and the two ways they enter
Publication 969 describes two routes in. Contributions a person makes themselves, or that someone other than their employer makes, are claimed as a deduction: "You can claim a tax deduction for contributions you or someone other than your employer make to your HSA even if you don't itemize your deductions on Schedule A (Form 1040)." Contributions an employer makes, including those through a cafeteria plan, "may be excluded from your gross income."
The layer only covers contributions within the annual limit. Those limits, read on irs.gov on September 11, 2026:
| Figure | 2026 (Rev. Proc. 2025-19) | 2027 (Rev. Proc. 2026-24) |
|---|---|---|
| Self-only HDHP coverage | $4,400 | $4,500 |
| Family HDHP coverage | $8,750 | $9,000 |
Publication 969 (2025) also describes an additional $1,000 contribution for an eligible individual age 55 or older. The limit is also affected by eligibility: the publication states that "beginning with the first month you are enrolled in Medicare, your contribution limit is zero."
Layer 2: the money inside the account
Publication 969 states that "the interest or other earnings on the assets in the account are tax free." HealthCare.gov's glossary says the same in consumer terms: an HSA "may earn interest or other earnings, which are not taxable."
This article stops at the tax rule. What an HSA custodian offers inside the account, and whether anything inside it should be invested, is outside what this site covers.
Layer 3: distributions, and what happens when one is not qualified
The third layer depends entirely on use. When a distribution pays a qualified medical expense, it may be tax free. When it does not, Publication 969 describes two consequences: the amount is included in income, and it is subject to "a 20% additional tax."
There is a named exception to the additional tax, and it is where the HSA begins to resemble a retirement account. Publication 969 states: "There is no additional tax on distributions made after the date you are disabled, reach age 65, or die." After 65, a non-medical withdrawal is still included in income, but the 20% additional tax no longer applies.
What an HSA generally cannot pay: premiums
A common surprise. Publication 969 states: "You may not use HSA funds to pay for insurance, except for" a short list, which it gives as long-term care insurance, COBRA continuation coverage, health coverage while receiving unemployment compensation, and Medicare and other health coverage for people 65 or older. HealthCare.gov's glossary summarizes: "HSA funds generally may not be used to pay premiums."
What an HSA is commonly used for instead are the costs the plan leaves to the member. That sequence, deductible first and then coinsurance, is set out in our guide to how a deductible and coinsurance work. Which of those costs count toward the plan's annual ceiling is a separate question, covered in our explainer on what counts toward your out-of-pocket maximum.
What changed for 2026
The IRS announced several changes under the law it calls the One, Big, Beautiful Bill, in news release IR-2025-119 dated December 9, 2025 and read September 11, 2026. Three matter to how an HSA works:
- Telehealth. The law "made permanent the ability to receive telehealth and other remote care services before meeting the high-deductible health plan (HDHP) deductible while remaining eligible to contribute to an HSA."
- Bronze and catastrophic plans. "As of Jan. 1, 2026, bronze and catastrophic plans available through an Exchange are considered HSA-compatible, regardless of whether the plans satisfy the general definition of an HDHP."
- Direct primary care. "Beginning Jan. 1, 2026, an otherwise eligible individual enrolled in certain direct primary care (DPC) service arrangements may contribute to an HSA."
Each change widens layer 1, who may contribute. None changes layers 2 or 3.
The limits of the triple tax description
Three honest caveats that promotional pages tend to skip.
It is a federal description. Publication 969 describes federal income tax treatment. Each state sets its own income tax rules, and the IRS publication does not say how any state treats HSA contributions or earnings. A state's tax agency or a local tax professional can answer that.
It depends on records. Layer 3 depends on a distribution paying a qualified medical expense. The account holder, not the custodian, is the one who may need to show that later, so receipts and explanations of benefits matter. The tax return reports HSA activity on Form 8889.
It is not an insurance product. An HSA pays nothing on its own. The health plan does the insuring; the HSA holds the member's own money for the member's share. Our explainer on premium, deductible, limit and out-of-pocket sets out which of those words belongs to the policy and which to the member.
Who can answer a question about your own HSA
The HSA custodian, for account statements and distribution records. The employer's benefits administrator, for payroll contributions and the plan's HDHP status. A CPA or enrolled agent, for how contributions and distributions go on a return, including Form 8889. What they need from you: the custodian's year-end forms, Form W-2 showing any employer or payroll contributions, and receipts for medical expenses paid from the account. The IRS rules are in Publication 969.
Frequently asked questions
What is the HSA triple tax advantage?
IRS Publication 969 describes three separate rules: contributions are deductible or excluded from income, "the interest or other earnings on the assets in the account are tax free," and distributions "may be tax free if you pay qualified medical expenses."
What happens if HSA money is spent on something non-medical?
Publication 969 states that the amount is included in income and subject to "a 20% additional tax," with no additional tax on distributions after the account holder is disabled, reaches age 65, or dies.
Can I keep my HSA if I leave my job?
Yes. Publication 969 says an HSA "stays with you if you change employers or leave the work force."
What are the HSA contribution limits for 2026?
IRS Rev. Proc. 2025-19 sets the 2026 limit at $4,400 for self-only HDHP coverage and $8,750 for family coverage. For 2027, Rev. Proc. 2026-24 sets $4,500 and $9,000.
Sources, all read September 11, 2026: IRS Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans. IRS Rev. Proc. 2025-19, Internal Revenue Bulletin 2025-21, May 19, 2025. IRS Rev. Proc. 2026-24, Internal Revenue Bulletin 2026-25, June 15, 2026. IRS news release IR-2025-119, December 9, 2025. HealthCare.gov glossary, "Health Savings Account (HSA)," no date shown.