A Health Savings Account is one of the most tax-advantaged accounts in the US system, and a lot of people miss it. You can only contribute to one if you are enrolled in a specific kind of health plan: an HSA-compatible high-deductible health plan, or HDHP.
I want to explain what makes a plan HSA-eligible, what the tax benefits look like in practice, and when this combo is actually a good idea (because it is not for everyone).
What makes a plan HSA-compatible
The IRS sets the rules each year. There are two thresholds.
A minimum deductible. The plan deductible has to be at or above an IRS-set floor for self-only and family coverage. The numbers change annually. The current figures are in IRS Publication 969 and on the Form 8889 page.
A maximum out-of-pocket limit. The plan out-of-pocket maximum has to be at or below an IRS-set ceiling. This number also changes annually.
Plus a behavioral rule. The plan generally cannot pay for services before the deductible, with the major exception of preventive care, which is always free in network. Some plans also pre-deductible cover certain chronic care medications under IRS guidance.
If a plan meets the deductible minimum, the out-of-pocket maximum, and the pre-deductible payment rules, it is HSA-qualified. The marketplace flags HSA-eligible plans. So do most employer benefit portals.
The triple tax benefit of an HSA
This is what makes the HSA different from almost every other account.
Contributions are tax deductible. Money you put into an HSA reduces your taxable income for the year. If you contribute through payroll, you also avoid Social Security and Medicare tax on that money, which is a benefit you do not get with a traditional IRA.
Growth is tax-free. Many HSAs let you invest the balance once you have a minimum cash cushion. Investment gains inside the HSA are not taxed.
Withdrawals for qualified medical expenses are tax-free. You take the money out, you pay no tax on it as long as you spent it on something the IRS considers a qualified medical expense.
No other account combines all three. A traditional 401(k) gives you the first benefit. A Roth gives you the third. The HSA gives you all three for qualified medical use.
Contribution limits and catch-up
The IRS publishes contribution limits each year for self-only and family coverage. There is also a catch-up contribution if you are 55 or older. Family coverage limits are higher than self-only limits.
If both spouses are 55 or older, each can make a catch-up contribution, but only into their own HSAs. Two HSAs are needed in that case.
Contributions can be made any time during the year and up to the federal tax filing deadline of the following year (typically April 15). Many people prefer to contribute through payroll for the FICA savings, but lump-sum contributions are allowed.
What HSA money can pay for
The IRS list of qualified medical expenses is broad and is in Publication 502. It includes:
- Deductibles, copays, coinsurance
- Most prescriptions, including insulin
- Dental and vision care
- Therapy and counseling
- Acupuncture and chiropractic
- Glasses, contacts, prescription sunglasses
- Hearing aids
- Long-term care premiums (within limits)
- COBRA premiums
- Medicare premiums after age 65 (Part B, Part D, Medicare Advantage) - but not Medigap
It does not cover:
- Most over-the-counter items without a prescription, with exceptions for things like menstrual care and OTC drugs added under the CARES Act
- Cosmetic procedures
- Gym memberships
- General wellness products
If you are not sure whether something qualifies, the IRS Publication 502 list is the authoritative source.
When an HSA-compatible plan makes sense
This plan type works best for some people and not others. Here is how I usually think about it.
It makes sense if:
You are reasonably healthy and your annual medical use is light. The high deductible rarely gets hit, so you save on premiums.
You can afford to fund the HSA. The tax savings are only valuable if you actually put money in. If you cannot contribute, the HDHP is just a high-deductible plan without the benefit.
You want a long-term retirement-style account. After 65, the HSA acts like a traditional IRA for non-medical use plus stays tax-free for medical use. Some people treat the HSA as a stealth retirement account and pay current medical bills out of pocket so the balance keeps compounding.
You have predictable preventive needs. Preventive care is free, so an annual checkup, screenings, and routine vaccines do not push you toward the deductible.
It often does not make sense if:
You have a chronic condition with regular high-cost care. You will hit the deductible most years, and the lower premium does not offset the cost.
You have planned high-cost events soon (surgery, pregnancy). A lower-deductible plan usually wins.
You cannot afford the deductible if something happens. If you do not have savings to cover the deductible from cash flow, the math may not work.
A simple comparison
Two plans for a single, generally healthy person.
| Number | HDHP with HSA | Traditional PPO |
|---|---|---|
| Monthly premium (employee share) | $180 | $310 |
| Deductible | $3,200 | $1,000 |
| Out-of-pocket max | $5,000 | $4,500 |
| Annual HSA tax savings (24 percent bracket, $3,000 contribution) | About $720 | Not eligible |
Annual premium difference: $130 a month, or $1,560 a year. Tax savings on HSA contributions: about $720 (income tax) plus another $230 in FICA savings if contributed through payroll, for roughly $950.
In a quiet year, the HDHP wins by about $2,400.
In a year with one $5,000 medical event, the HDHP still wins, because the difference in deductibles ($2,200) is less than the combined premium and tax savings.
In a year with two large events that hit the out-of-pocket maximum, the difference narrows. The HDHP is still close, but the PPO predictability may be worth more to you.
Things that disqualify you from contributing
Some life events make you HSA-ineligible.
Enrolling in Medicare. Any part of Medicare, including just Part A, ends HSA contributions. This catches people who file for Social Security at 65 and get auto-enrolled in Part A.
Being claimed as a dependent on someone else return.
Having other "first-dollar" coverage. A regular FSA (not a limited-purpose FSA) is the most common conflict. A spouse FSA can also disqualify you if it covers your expenses.
Veterans Affairs care within the past three months for non-service-connected conditions. There is an exception for service-connected disabilities.
What to do next
Check whether a plan is labeled "HSA-eligible" on the marketplace, your employer portal, or the plan SBC. If it is, look for an HSA provider with low fees and an investment option once your balance is above a minimum.
Decide your contribution rate. Even $50 a paycheck adds up over a year and gets the FICA savings.
If you are deciding between an HDHP-plus-HSA and a more traditional plan, work through your expected medical year using the comparison framework and check our broader marketplace overview.
Sources
Frequently asked questions
What makes a plan HSA-eligible?
The IRS sets minimum deductible amounts and maximum out-of-pocket amounts each year. A plan that meets those numbers and does not pay for most services before the deductible is HSA-qualified.
Can I have an HSA if I am on Medicare?
No. Once you enroll in any part of Medicare, you can no longer contribute to an HSA. You can still spend down what you already have.
Do HSA contributions roll over?
Yes. HSAs do not have use-it-or-lose-it rules. Balances roll over indefinitely and follow you between jobs.
Can I use HSA money for non-medical expenses?
Yes, but you pay income tax plus a 20 percent penalty before age 65. After 65, you pay income tax but no penalty, similar to a traditional IRA.
