U.S. Health Savings Accounts: Eligibility, Tax Treatment, and Observed Use
Explains federal HSA eligibility and tax rules alongside EBRI’s observed account-use findings.
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Eligibility must be checked against both the tax year and the plan type. The IRS says certain bronze and catastrophic plans are treated as HSA-compatible beginning January 1, 2026. It also explains that the rule allowing pre-deductible telehealth without losing HSA eligibility became permanent for plan years starting in 2025. Do not assess every plan using only the older HDHP test; check the actual coverage documents and current IRS guidance. IRS HSA expansion guidance
For 2026, the standard HDHP test requires a deductible of at least $1,700 self-only or $3,400 family, with out-of-pocket limits no higher than $8,500 and $17,000, respectively. Certain bronze and catastrophic plans newly treated as HSA-compatible for 2026 may qualify under a separate statutory rule; verify the plan’s actual status instead of assuming the standard HDHP test alone decides it.
1. Eligibility depends on tax rules, not the plan’s label
A Health Savings Account (HSA) is available to an individual who meets federal tax requirements, including enrollment in an eligible high deductible health plan (HDHP). IRS Publication 969 also identifies other health coverage, dependent status, and Medicare enrollment as relevant eligibility questions. A plan’s marketing name alone does not establish that contributions are allowed. Deductible and out-of-pocket thresholds may change by tax year, so check the IRS publication for the applicable year and the terms of the actual plan before contributing.
For tax year 2026, IRS Revenue Procedure 2025-19 sets the annual contribution limit at $4,400 for self-only HDHP coverage and $8,750 for family coverage. These are total annual HSA limits, not amounts that an employer can add on top of the limit. The amount an individual may actually contribute can depend on eligible months and other contributions, so a midyear coverage change should not be treated as permission to use the full-year limit automatically. IRS Revenue Procedure 2025-19
2. Tax treatment of contributions and qualified withdrawals
The IRS explains that an individual’s HSA contribution may be deductible even without itemizing deductions, while employer contributions are excluded from the employee’s income. Distributions used for qualified medical expenses are not taxed. These features are often summarized as a triple tax advantage, but that phrase does not mean personal deposits, payroll deductions, and employer contributions all receive identical payroll tax treatment. Reconcile the contribution type, payroll records, Form 8889, and tax return. The reviewed sources do not require a particular investment and do not promise investment gains.
Interest and other earnings on HSA funds are not included in federal income while held in the account. This is tax treatment, not a promise of investment gains or principal growth.
3. Nonqualified spending and recordkeeping
A distribution used for a nonqualified purpose is generally included in income and may be subject to an additional tax. The IRS also provides exceptions involving circumstances such as disability, death, and reaching a specified age, so the same additional tax should not be assumed for every account holder. If a person pays an expense out of pocket and seeks reimbursement later, retain receipts and statements showing that the expense qualified and was not reimbursed elsewhere. A delay between payment and withdrawal does not by itself establish eligibility. Not every insurance premium qualifies as a medical expense; check the IRS rules. The IRS says an HSA trustee reports distributions on Form 1099-SA, and the account holder reports them on Form 8889. Those forms show distribution amounts; they do not establish that an expense qualified or was not reimbursed, so keep the underlying receipts and insurance statements.
4. What EBRI’s account data shows
EBRI published its 2023 report in June 2025, analyzing contributions, withdrawals, and investment activity in a database of more than 14 million HSAs. It reports that average year-end balances in 2023 exceeded average beginning balances, and accounts receiving employer contributions had higher total contributions and were more likely to invest. These are observed associations in the dataset. They do not prove that employer contributions caused investment activity or predict future returns. Having an HSA also does not automatically invest its balance; products, fees, and minimums vary by provider.
Expert perspective: limits of the evidence
The IRS explains federal eligibility and tax treatment; EBRI analyzes observed account behavior. Neither source says HSA investing is best for everyone or guarantees the same tax savings. This article covers U.S. federal rules and does not resolve state tax treatment, plan terms, or an individual’s eligibility.
Illustrative month-based calculation: If you were eligible for self-only standard HDHP coverage for six months of the tax year and do not use the last-month rule, the basic limit is $4,400 × 6/12 = $2,200. This is the combined annual HSA contribution limit for you and your employer. Catch-up contributions, coverage type in earlier months, and the last-month rule and its testing period require separate treatment; check Form 8889 instructions before filing. IRS Publication 969
Practical checks before acting
Calculate the limit for eligible months and verify catch-up rules separately. An otherwise eligible person age 55 or older may also have a $1,000 catch-up limit for 2026; Medicare enrollment makes the person ineligible to contribute for applicable months. Confirm the age, coverage-month, and account-holder rules before counting it. Under the last-month rule, someone eligible in December may sometimes use the annual cap; losing eligibility during the following testing period can make the extra amount taxable and subject to an additional tax. Stop HSA contributions for months after Medicare enrollment starts, including retroactive enrollment. Publication 969 requires Form 8889 with a federal return when the taxpayer or spouse has HSA activity, even if only employer contributions. Check coverage dates, fees, investment terms, and the applicable year’s Form 8889 instructions; the $4,300 self-only limit is a 2025 figure and must not be carried into 2026.