Short-term health plans: what that cheap premium actually buys

Search for health insurance outside open enrollment and you'll be flooded with ads for plans costing $150 a month when marketplace coverage runs $450. These are mostly short-term limited-duration insurance (STLDI) and fixed-indemnity products — and the price difference isn't a discount, it's a different product wearing insurance's clothes. Sometimes that product has a legitimate use. More often, buyers discover the difference in a hospital bed. Here's the honest comparison.

Why short-term plans are legally different

The Affordable Care Act's consumer protections — guaranteed coverage of preexisting conditions, essential health benefits, no annual or lifetime dollar caps, free preventive care, capped out-of-pocket maximums — apply to ACA-compliant plans. Short-term plans are explicitly exempt from all of it. They exist in a parallel legal universe where the insurer can decline you, exclude your conditions, cap what it pays, and rescind coverage after the fact.

• Medical underwriting: applications ask about your health, and the insurer can reject you or charge more based on the answers.
• Preexisting condition exclusions: anything you had — sometimes anything you had symptoms of, even undiagnosed — can be excluded from coverage entirely.
• Benefit caps: many policies cap total payout at $250,000 to $1 million, and cap specific services per day (e.g., $1,000/day hospital room when the real cost is $3,000+).
• No essential benefits: prescription drugs, maternity, and mental health are commonly excluded outright.
• Post-claims underwriting: after a big claim, the insurer can comb your medical history and rescind the policy for an undisclosed condition — legal in this market, prohibited in ACA plans.
• Duration limits: federal rules adopted in 2024 limit new short-term plans to 3 months with a maximum 4-month total including renewal, and several states ban or restrict them further — so the 'year of cheap coverage' pitch often isn't even available anymore.

Fixed indemnity: not insurance at all, functionally

Fixed-indemnity plans pay you a preset cash amount per event — $100 per doctor visit, $1,000 per hospital day — regardless of the actual bill. Sold as supplements, they're increasingly marketed as primary 'coverage.' Against a real hospitalization they're a rounding error: a three-day stay billed at $45,000 might return $3,000. Regulators now require these products to carry disclaimers that they are not comprehensive coverage, which tells you what you need to know about how they were being sold.

The comparison, honestly

When a short-term plan actually makes sense

There's a narrow, legitimate use case: a healthy person bridging a true gap of a few weeks to a couple of months — between jobs with a known start date, or between graduation and employer coverage — who has missed the special enrollment window or finds full-price marketplace coverage genuinely unaffordable. In that scenario you're buying catastrophe-only protection against the injury or sudden illness that would otherwise bankrupt you, fully aware the plan covers little else.

Questions to ask before signing anything

1. Is this plan ACA-compliant — yes or no? (Make them say the words.)
2. What is the maximum the plan will pay, in total and per day of hospitalization?
3. Exactly how does the policy define and exclude preexisting conditions — and over what lookback period?
4. Are prescriptions, mental health, and maternity covered at all?
5. Can the policy be rescinded after a claim, and under what circumstances?
6. What happens if my coverage need outlasts the policy's maximum duration?

The bottom line

Short-term and fixed-indemnity plans are cheap because they've contracted out of every protection that makes insurance work when you actually need it. For a healthy person plugging a genuine few-week gap with eyes open, a short-term plan can be a rational catastrophe hedge. As a substitute for real coverage, it's a lottery ticket where the losing outcome is bankruptcy. Check your special-enrollment eligibility, price a subsidized marketplace plan, and remember COBRA's 60-day retroactive election before you let a cheap premium make the decision for you.