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How an HSA Works
A Health Savings Account is a savings and investment account paired with a High-Deductible Health Plan (HDHP). You contribute money — up to the annual IRS limit — into the HSA before taxes. The money grows tax-free through either interest or investments. When you spend it on qualified healthcare expenses, withdrawals are tax-free too. That's the triple tax advantage that makes HSAs the most tax-efficient savings vehicle available to most Americans.
Unlike a Flexible Spending Account (FSA), unused HSA funds roll over indefinitely from year to year. There's no "use it or lose it" deadline. You can contribute at 35, never touch the money, invest it in index funds, and withdraw it tax-free for healthcare at 65 or beyond.
Who Can Open an HSA?
To contribute to an HSA, you must meet all of the following:
- Enrolled in a High-Deductible Health Plan (HDHP) as your primary coverage
- Not enrolled in Medicare (Part A or Part B)
- Not covered by another non-HDHP health plan (e.g., a spouse's traditional PPO)
- Not claimed as a tax dependent on someone else's return
For 2026, an HDHP is defined as a plan with a minimum deductible of $1,650 (individual) or $3,300 (family), and maximum out-of-pocket limits of $8,300 (individual) or $16,600 (family). Many employer-sponsored HDHPs qualify.
2026 Contribution Limits
| Coverage Type | Standard Limit | 55+ Catch-Up | Total (55+) |
|---|---|---|---|
| Individual HDHP | $4,300 | $1,000 | $5,300 |
| Family HDHP | $8,550 | $1,000 | $9,550 |
Employer contributions count toward these limits. If your employer contributes $1,500 to your HSA, your personal contribution limit is reduced by $1,500 for that year.
What You Can Spend HSA Funds On
IRS Publication 502 defines qualified medical expenses. Broad categories include:
- Doctor visits, hospital care, surgery, lab work
- Prescription and over-the-counter medications (since 2020)
- Dental care (cleanings, fillings, crowns, orthodontics)
- Vision care (glasses, contacts, LASIK)
- Mental health services
- Medical equipment (crutches, hearing aids, blood pressure monitors)
- After age 65: Medicare Part B, Part D, and Medigap premiums
- Long-term care insurance premiums (up to IRS age-based limits)
Premiums for a working spouse's employer health insurance do not qualify. Cosmetic procedures, gym memberships, and most supplements don't qualify unless prescribed by a doctor.
How to Invest HSA Funds
Most HSA providers offer investment options once your cash balance exceeds a threshold (typically $1,000–$2,000). Common options include mutual funds and ETFs — similar to a 401k investment menu. The best approach: hold the cash minimum needed for near-term medical costs and invest the rest in low-cost index funds. Growth is entirely tax-free.
Not all HSA providers have good investment options. Fidelity, Lively, and HealthEquity are commonly recommended for investment quality, fund selection, and low fees. If your employer's HSA provider has poor investment options, you may be able to transfer funds annually to a better HSA administrator while keeping the employer contribution in the original account.
HSA After Age 65
Once you turn 65 (or enroll in Medicare, whichever comes first), two things change: (1) You can no longer make new HSA contributions. (2) The 20% penalty for non-medical withdrawals disappears. After 65, non-healthcare withdrawals are taxed as ordinary income — exactly like a traditional IRA withdrawal. Healthcare withdrawals remain permanently tax-free. This makes the HSA uniquely flexible in retirement: it's a dedicated tax-free healthcare account that doubles as a traditional IRA backup.
For a deeper look at using the HSA specifically as a retirement tool, read using your HSA as a retirement account. For a side-by-side comparison with FSAs, see HSA vs. FSA.
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Frequently Asked Questions
Who qualifies for an HSA?
You must be enrolled in a High-Deductible Health Plan (HDHP), not enrolled in Medicare, not covered by another non-HDHP, and not a tax dependent. For 2026, an HDHP must have a minimum deductible of $1,650 (individual) or $3,300 (family).
Does HSA money expire?
No. Unlike FSAs, HSA balances roll over completely every year — unused funds never expire. You can accumulate HSA funds for decades, invest them, and withdraw tax-free for healthcare at any age.
What are the 2026 HSA contribution limits?
$4,300 for individual HDHP coverage, $8,550 for family HDHP coverage. Age 55+ can contribute an additional $1,000 catch-up: $5,300 individual, $9,550 family. Employer contributions count toward these limits.
Can I use an HSA for non-medical expenses?
Before age 65: non-medical withdrawals face income tax plus a 20% penalty. After age 65: non-medical withdrawals are taxed as ordinary income but no penalty applies. Healthcare withdrawals are always tax-free at any age.
Can I contribute to an HSA after 65?
No. HSA contributions stop when you enroll in Medicare (typically at 65). However, you can still invest and grow existing funds, and withdraw them tax-free for qualified medical expenses (including Medicare premiums) indefinitely.