What Is a High-Deductible Health Plan?

A High-Deductible Health Plan, or HDHP, is a type of health insurance policy characterized by a higher-than-average deductible — the amount you pay out of pocket before your insurance begins covering costs. In exchange for that higher deductible, HDHPs generally charge lower monthly premiums than traditional plans.

The IRS sets minimum thresholds that a plan must meet to qualify as an HDHP. For 2024, an HDHP must have a deductible of at least $1,600 for individual coverage or $3,200 for family coverage, and out-of-pocket maximums cannot exceed $8,050 (individual) or $16,100 (family).

For a broader comparison of plan structures — including HMOs, PPOs, and EPOs — see our plain-English guide to health plan types.

HDHP Thresholds Change Annually

The IRS adjusts the minimum deductible and maximum out-of-pocket thresholds for HDHPs each year, typically in the fall. Always verify the current-year thresholds on IRS.gov or in your plan's Summary of Benefits and Coverage before assuming a plan qualifies.

How the HSA Works Alongside an HDHP

The HSA is designed to fill the gap created by a high deductible. Because you pay more before insurance coverage activates, the HSA gives you a dedicated, tax-favored place to accumulate funds for those costs. The two components work as a system: the HDHP lowers your premium; the HSA helps you build reserves to cover the deductible when care is needed.

There are three layers of tax benefit with an HSA:

  • Contributions are tax-deductible (or pre-tax if made through payroll).
  • Growth — including interest or investment earnings — is tax-free.
  • Withdrawals for qualified medical expenses are also tax-free.

This triple tax advantage is what makes the HSA unusually powerful as a financial tool. Funds not used for near-term medical costs can be invested and grow over time, functioning similarly to a retirement account for healthcare expenses.

$116B+

Total assets held in HSAs across the US

According to Devenir Research's 2023 HSA market statistics report, total HSA assets surpassed $116 billion, reflecting significant growth in adoption.

35M+

HSA accounts open in the United States

Devenir Research estimated more than 35 million HSA accounts were open as of year-end 2023, up from under 10 million a decade earlier.

Trade-Offs Families Should Weigh

An HDHP-plus-HSA combination is not automatically the right choice for every household. Here are the key trade-offs to consider:

Potential advantages

  • Lower monthly premiums free up cash for other household needs or HSA contributions.
  • HSA funds roll over indefinitely — there is no use-it-or-lose-it pressure.
  • After age 65, HSA funds can be used for any purpose (ordinary income tax applies but no penalty), making it a secondary retirement savings vehicle.

Potential drawbacks

  • A high deductible means larger upfront costs when healthcare is needed. Families without adequate HSA savings may find this stressful.
  • Some families — particularly those managing chronic conditions or anticipating frequent care — may spend more overall under an HDHP than a lower-deductible plan with higher premiums.
  • HSA eligibility is lost if you enroll in Medicare or are claimed as a dependent on someone else's tax return.

If your family is weighing the difference between employer-sponsored options and Marketplace plans, our article on employer-sponsored coverage vs. Marketplace plans covers the broader picture. You may also find it helpful to understand how family deductibles and cost-sharing work when adding dependents to a plan.

Compare Total Cost, Not Just Premium

When evaluating an HDHP against other plan types, look beyond the monthly premium. Calculate total annual premium cost plus each plan's out-of-pocket maximum to compare worst-case scenarios. Then factor in any HSA tax savings and employer HSA contributions to get a clearer picture of true cost.

Putting It Into Practice

A practical approach for families exploring this combination is to calculate the total potential cost of each plan option — not just the premium. Add up annual premiums plus the plan's out-of-pocket maximum to see the worst-case scenario, then compare across available plans.

If the premium savings of an HDHP roughly equal or exceed the difference in deductibles, the HDHP may be financially competitive — especially if you can redirect those premium savings into HSA contributions.

For foundational guidance on how health coverage works in general, our health insurance explainer is a good starting point. You can also reference our health insurance glossary to decode any terms you encounter in plan documents.

This article is for general informational and educational purposes only. It is not personalized financial, tax, insurance, or legal advice. HSA rules, contribution limits, and HDHP thresholds are set by the IRS and may change annually. Please consult a licensed insurance agent, financial adviser, or tax professional regarding your specific situation.