High Deductible Health Plan (HDHP)

A high deductible health plan is a health plan defined by Internal Revenue Code section 223(c)(2). The definition has two limbs. The plan must have an annual deductible of at least a stated amount, currently $1,700 for self-only coverage and $3,400 for family coverage. And the sum of the annual deductible and the other annual out-of-pocket expenses the plan requires for covered benefits, premiums excluded, must not exceed $8,500 for self-only coverage or $17,000 for family coverage.

The name describes the first limb and hides the second, which is why HealthCare.gov notes that the plan "is more commonly called an HSA-eligible plan." That is the better name. Nothing about a high deductible is intrinsically desirable; the point of the category is that satisfying it is the condition of being allowed to contribute to a health savings account, and the phrase "high deductible" describes the price of admission rather than the benefit.

🔴 A high deductible is necessary and not sufficient, and this is the commonest consumer error about the category. The statute does more than set a floor under the deductible: it requires that the deductible actually operate, so a plan that pays for ordinary care below the deductible fails even if the deductible figure itself is enormous. What the plan may pay for ahead of the deductible is a closed list written into section 223(c)(2), and it has grown over time. Preventive care has always been carved out. So now are telehealth and other remote care services, benefits provided under the federal surprise-billing protections, and selected insulin products. Out-of-network arrangements in a network plan get their own rule. Everything else pays only above the deductible, which is why an otherwise attractive plan with a modest office-visit copayment from day one is not an HSA-eligible plan.

The family figures are twice the self-only figures by construction. Section 223(c)(2)(A) writes each family amount as "twice the dollar amount" for self-only coverage rather than setting it independently, so the pairs move together and can never drift apart. The statute's own numbers, $1,000 and $5,000, are 1997 base amounts; section 223(g) indexes them, which is why the figures a reader needs come from the annual revenue procedure rather than from the code. ⚠️ Those figures come out in a spring revenue procedure of their own, not the large autumn one that carries the tax brackets, which is why looking for them in the wrong document finds nothing.

🔑 The out-of-pocket ceiling here is not the Affordable Care Act ceiling, and confusing them is expensive. Section 223 caps a qualifying plan's total out-of-pocket exposure well below what the Affordable Care Act alone would permit, and the two limits are now far apart because they index on different measures. The practical effect is a consumer protection that is easy to miss: a plan cannot be HSA-eligible and simultaneously push cost sharing to the ceiling the Affordable Care Act allows. Which ceiling a quoted figure refers to has to be established before the figure means anything.

What disqualifies you is other coverage, not other insurance in general. Section 223(c)(1)(A) makes eligibility monthly, and it turns on being covered by a qualifying plan and not covered by another health plan that both fails the section 223 test and covers a benefit the qualifying plan covers. That precision is why a general-purpose health flexible spending account disqualifies you and a limited-purpose one does not: the general-purpose arrangement reimburses the same medical expenses the plan covers, and the limited-purpose version is confined to categories such as dental and vision that the statute disregards anyway. Section 223(c)(1)(B) also disregards accident, disability, dental, vision, long-term care and telehealth coverage, and section 223(c)(1)(C) protects veterans receiving care for a service-connected disability. A direct primary care arrangement is likewise not treated as a health plan for this purpose, provided the aggregate monthly fee does not exceed $150 for one person or $300 where the arrangement covers more than one; that limit becomes inflation-adjusted for taxable years beginning after 2026.

Two changes took effect in 2026 and both widened the category. A bronze or catastrophic plan available as individual coverage through a Marketplace Exchange is now treated as a high deductible health plan under section 223(c)(2)(H) whether or not it meets the ordinary deductible and out-of-pocket tests. And a direct primary care arrangement, which used to be disqualifying coverage, no longer is. Both changes came from the July 2025 reconciliation statute. Anyone who concluded in an earlier year that they could not fund a health savings account should check the conclusion again.

1. The plan's deductible is tested against the statutory minimum for the coverage tier, self-only or family.

2. The plan's total cost sharing is tested against the statutory maximum: the deductible plus all other out-of-pocket amounts required for covered benefits, premiums excluded.

3. What the plan pays before the deductible is tested. Preventive care, telehealth and other remote care, surprise-billing protected benefits and selected insulin products are permitted; ordinary care is not.

4. Your own other coverage is tested, month by month. A second health plan covering the same benefits, including a general-purpose health flexible spending account, ends eligibility for the months it applies.

5. If all four hold, you may contribute to a health savings account up to that year's limit, $4,400 for self-only coverage or $8,750 for family coverage, plus $1,000 from age 55.

A hypothetical, showing that the deductible figure does not settle the question. Two employer plans both carry a $3,000 individual deductible, comfortably above the statutory floor. Plan A pays nothing before the deductible except preventive care and telehealth. Plan B is identical except that it charges a $25 copayment for primary care visits from the first day of the plan year, with the plan picking up the rest of the visit.

Plan A is a high deductible health plan and its holder may fund a health savings account. Plan B is not, because it pays for ordinary care below the deductible, and that is outside the categories section 223 permits. The deductible is the same, the premium may well be the same, and the tax consequence is completely different. Figures are illustrative; the test is not.

Change one more fact. Suppose the employee on Plan A also elects a general-purpose health flexible spending account. The account reimburses the same medical expenses the plan covers, so it is disqualifying coverage, and the employee cannot contribute to a health savings account for any month it is in force. Electing the limited-purpose version instead, confined to dental and vision, leaves eligibility intact.

Pros

• It is the only route to a health savings account, which is the sole account in the tax code offering a deduction going in, untaxed growth, and tax-free withdrawals for qualified medical expenses.
• Its out-of-pocket ceiling is held below what the Affordable Care Act alone would allow, so the worst case is bounded more tightly than on a comparable non-qualifying plan.
• Preventive care is covered before the deductible, and since 2025 so are telehealth and other remote care services on a permanent basis.
• Premiums are generally lower than on a plan with a small deductible, and the difference can be redirected into the account rather than spent.
• Since 2026 the category reaches bronze and catastrophic Marketplace plans, which brings the account within reach of many self-employed and individual-market buyers who were previously shut out.

Cons

• The deductible is real money owed at the worst possible moment, and the tax advantage is worth nothing to someone who cannot produce it.
• It suits predictable low spending or genuinely catastrophic spending, and fits worst in the middle: chronic conditions, ongoing prescriptions or a planned procedure.
• The eligibility test is monthly and easy to break by accident, most often through a spouse's general-purpose health flexible spending account.
• Enrolling in Medicare ends the ability to contribute, and Part A enrolment can be backdated, which catches people working past 65.
• The name misleads. A plan with a large deductible that fails any other limb of the test gives you the deductible and none of the tax benefit.