A High-Deductible Health Plan is exactly what the name says: a health insurance plan with a deductible well above what a typical plan charges, in exchange for a lower monthly premium. You're betting on needing less care during the year in exchange for paying less every month regardless. * The IRS doesn't just let insurers call any plan an "HDHP" — to qualify, and more importantly, to make you eligible to contribute to a Health Savings Account, a plan has to meet specific minimum deductible and maximum out-of-pocket thresholds that the IRS sets and adjusts for inflation every year. A plan with too low a deductible, or too high an out-of-pocket cap, simply doesn't count as HDHP-qualified under federal rules, regardless of what an insurer might call it. * Despite the higher deductible, HDHPs generally still cover many of the same core services as a lower-deductible plan — hospital stays, doctor visits, emergency care — and, like most modern health plans, they typically still cover certain preventive services, like annual checkups and standard screenings, before you've paid anything toward your deductible at all. * The real draw of an HDHP for a lot of people isn't the lower premium by itself — it's what enrolling in one unlocks: eligibility to open and contribute to a Health Savings Account, a tax-advantaged account you can use to pay for medical expenses tax-free, with any unused balance rolling over and growing year after year, unlike a Flexible Spending Account. * HDHPs make the most financial sense for people who are relatively healthy, have some savings cushion to cover the higher deductible if something unexpected happens, and want to actively use the HSA tax advantage rather than just carry lower-deductible insurance as a safety net.