Short-term health insurance is a type of temporary medical coverage designed to fill gaps between other plans, not to serve as year-round insurance. These policies last a maximum of three months, with a total coverage window of no more than four months including renewals. They cost less than standard health insurance because they cover far less, and they are not required to follow the consumer protections built into the Affordable Care Act.
How Short-Term Plans Differ From ACA Coverage
The most important thing to understand about short-term plans is what they leave out. Under the ACA, marketplace plans must cover ten categories of essential health benefits, including prescription drugs, maternity care, mental health treatment, and preventive services. Short-term plans have no such requirement, and the gaps are significant.
A KFF review of short-term products found that 98% exclude maternity care, 48% do not cover outpatient prescription drugs, 40% do not cover mental health services, and 40% exclude substance abuse treatment. Nearly all (94%) exclude adult immunizations. Even when a short-term plan does advertise preventive care, most services come with cost sharing or dollar limits that would be prohibited under ACA-compliant plans.
Short-term plans also have no cap on what you could spend out of pocket. ACA plans set a yearly maximum on your combined deductibles, copays, and coinsurance, so your financial exposure has a ceiling. Short-term plans can be sold with very high deductibles, and many impose annual or per-condition dollar limits on what the insurer will pay. Some cap hospital payments at a daily rate, which can leave you responsible for the difference if actual charges are higher.
Pre-Existing Conditions and Medical Underwriting
ACA plans cannot ask about your health history or deny you coverage for any reason. Short-term plans work the opposite way. When you apply, you’ll typically answer detailed questions about your current health, past illnesses, and prior treatments. The insurer can deny your application outright based on those answers.
If you are approved, your plan contract will almost certainly exclude any care related to a pre-existing condition. These exclusions are often written broadly. Even conditions you didn’t know about at the time of enrollment may not be covered if the insurer later determines they existed before your policy started.
Some insurers practice what’s called post-claims underwriting: after you receive care and file a claim, they investigate your medical history looking for evidence that the treatment relates to a condition you had before coverage began. If they find a connection, the claim is denied, and you’re responsible for the full bill. This can happen months after treatment, leaving you with unexpected costs you thought were covered.
What Short-Term Plans Typically Cover
Short-term insurance generally covers emergency room visits, hospitalization, and some doctor visits for new illnesses or injuries that arise during the coverage period. Think of it as protection against a sudden accident or unexpected illness rather than comprehensive healthcare.
Prescription drug coverage is limited when it exists at all. Among short-term products that do cover medications, nearly all impose a dollar cap ranging from $1,000 to $5,000 per policy term. Some also restrict the types of drugs covered, excluding contraceptives or covering them only when prescribed for a purpose other than preventing pregnancy.
Mental health and substance abuse benefits, when included, come with tight limits. Examples from reviewed plans include a $50 cap per outpatient visit, a 31-day maximum for inpatient care, and a $3,000 benefit limit per policy term. Plans covering substance use disorders often exclude any care resulting from being under the influence of alcohol or controlled substances.
Duration and Renewal Limits
Federal rules updated in September 2024 limit the initial contract term to no more than three months, with total coverage (including any renewals or extensions) capped at four months. This was a deliberate tightening. The goal was to prevent short-term plans from functioning as long-term substitutes for ACA coverage.
Some states impose stricter limits or ban short-term plans entirely. Before shopping, check your state insurance department’s rules, because the plan options available to you depend heavily on where you live.
Required Consumer Notices
Federal rules require every short-term plan to display a prominent notice on the first page of the policy, as well as in all marketing and enrollment materials, in at least 14-point font. The notice must clearly state that the coverage is not required to comply with ACA market requirements. It must also include a comparison table explaining that the plan might not cover pre-existing conditions, might not cover essential health benefits like prescription drugs or maternity care, and does not qualify you for federal premium subsidies or cost-sharing assistance.
If you’re reviewing a short-term plan and don’t see this notice, that’s a red flag. Legitimate insurers are required to display it before you have the opportunity to enroll.
Who Short-Term Insurance Is Designed For
These plans exist for a narrow set of circumstances. You might consider one if you’re between jobs and waiting for employer coverage to start, if you’ve aged out of a parent’s plan and need a few weeks of bridge coverage, or if you missed the ACA open enrollment window and don’t qualify for a special enrollment period. The low premiums reflect the limited protection: you’re paying less because the plan covers less and can deny claims that a marketplace plan could not.
If you have any ongoing health condition, take regular medications, are pregnant or planning to become pregnant, or need mental health care, a short-term plan is unlikely to cover those needs. You’d also forfeit eligibility for the federal subsidies that reduce premiums and out-of-pocket costs on ACA marketplace plans, which for many people make comprehensive coverage more affordable than they expect.
The core tradeoff is straightforward: short-term plans offer cheaper monthly costs in exchange for dramatically narrower coverage, no pre-existing condition protections, and no limit on what you might owe if something serious happens. For a healthy person who needs a few months of basic coverage and understands exactly what’s excluded, they can serve a purpose. For anything beyond that, the financial risks often outweigh the premium savings.