Losing a job, waiting for an employer plan to start, or aging off a parent’s policy can leave you without health coverage for a few weeks or months. Short-term health insurance is often marketed as a cheap way to fill that gap. It can serve a narrow purpose, but it is a very different product from a regular health plan, and buyers who do not understand the differences can end up with large unpaid medical bills. This guide explains how short-term health insurance works in the United States, what the federal rules say, and when other options are a better fit.
What short-term health insurance is
Short-term, limited-duration insurance, often shortened to STLDI, is a type of health coverage that is exempt from most Affordable Care Act requirements. Because it is not considered individual health insurance under federal law, it does not have to:
- Cover the ACA’s ten essential health benefits, such as maternity care, mental health treatment, and prescription drugs.
- Accept applicants with pre-existing conditions or charge them the same as healthy applicants.
- Cap annual out-of-pocket costs at the ACA limit.
- Avoid annual or lifetime dollar limits on benefits.
Insurers use medical underwriting, which means they can ask health questions, decline applicants, and exclude conditions you already have. In exchange, premiums are often lower than unsubsidized marketplace plans, especially for young and healthy buyers.
Federal duration limits
Federal rules that took effect for policies sold on or after September 1, 2024 limit short-term plans to an initial contract term of no more than three months and a maximum total duration of four months, including renewals or extensions, with the same insurer within a 12-month period. Earlier rules had allowed terms of up to 364 days and renewals for up to 36 months.
These rules also require a prominent consumer notice on the application and policy documents explaining that the coverage is not comprehensive and may not cover pre-existing conditions. Federal enforcement priorities can change, so check the current status with your state insurance department before buying.
State rules can be stricter
States can regulate short-term plans more tightly than federal law, and many do. Some states, including California, New York, and New Jersey, effectively prohibit or do not have short-term plans available. Others set shorter maximum durations or require certain benefits. A plan that is available in one state may be unavailable just across the border, so your state’s rules determine what you can actually buy.
What short-term plans usually exclude
The exclusions are where most problems happen. Common limitations include:
- Pre-existing conditions. Many plans will not pay for any condition you were diagnosed with, treated for, or had symptoms of during a look-back period before coverage began. Some insurers review your medical records after a large claim to see whether the condition existed earlier.
- Maternity and newborn care. Pregnancy is commonly excluded entirely.
- Prescription drugs. Coverage may be absent or limited to a discount card.
- Mental health and substance use treatment. Often excluded or heavily limited.
- Preventive care. Routine checkups and screenings that ACA plans cover without cost sharing may not be covered.
- Benefit caps. Plans may have per-condition or per-policy maximums, meaning coverage stops once a dollar limit is reached.
Post-claims underwriting
One practice to understand is post-claims underwriting. When you file a significant claim, the insurer may request your past medical records to determine whether the condition was pre-existing. If it decides the condition existed before your coverage began, it may deny the claim, even if you were never formally diagnosed. Read the policy’s definition of a pre-existing condition carefully.
How short-term coverage compares with other options
| Feature | Short-term plan | ACA marketplace plan | COBRA |
|---|---|---|---|
| Covers pre-existing conditions | Often no | Yes | Yes |
| Essential health benefits | Not required | Required | Same as employer plan |
| Premium subsidies | No | Yes, if eligible | No |
| Out-of-pocket maximum | Not required | Required | Same as employer plan |
| Maximum length (federal) | 4 months total | Plan year | Generally 18 months |
ACA marketplace plans
If you lose job-based coverage, you typically qualify for a special enrollment period on HealthCare.gov or your state’s marketplace, generally with 60 days to enroll. Depending on your income, you may qualify for premium tax credits that lower your monthly cost significantly. Many people who assume a marketplace plan is unaffordable are surprised by their subsidized price, so it is worth running an estimate before buying a short-term plan.
COBRA continuation coverage
COBRA lets you keep your former employer’s group plan, usually for up to 18 months, but you pay the full premium plus up to a 2% administrative fee. It is often expensive, but it keeps your doctors, deductible progress, and network the same. You generally have 60 days to elect COBRA, and coverage is retroactive to the date you lost your employer plan if you elect and pay on time.
Medicaid and CHIP
If your income has dropped, you may qualify for Medicaid, especially in states that expanded the program. Children may qualify for the Children’s Health Insurance Program even if parents do not. Medicaid enrollment is open year-round.
When a short-term plan might make sense
Short-term coverage may be reasonable in a narrow set of situations:
- You are healthy, have no ongoing conditions, and need coverage for a few weeks until a new employer plan begins.
- You missed open enrollment and do not qualify for a special enrollment period.
- You understand the exclusions and have savings to absorb costs the plan will not cover.
Even then, compare the total risk rather than just the premium. A low monthly price matters little if a single hospital stay for an excluded condition produces a bill of tens of thousands of dollars.
Fixed indemnity and other look-alike products
Short-term plans are sometimes confused with other limited products, such as fixed indemnity insurance, hospital indemnity plans, and health care sharing ministries. Fixed indemnity plans pay a set dollar amount per day in the hospital or per doctor visit, regardless of the actual bill. Health care sharing ministries are not insurance at all, and members have no guarantee that bills will be shared. None of these products provide the protections of ACA-compliant coverage. Federal rules now require fixed indemnity policies to include a notice stating that they are not comprehensive coverage.
Red flags when shopping
Be cautious if a seller:
- Pressures you to buy immediately or calls the plan “Obamacare” when it is not.
- Will not provide the full policy document before you pay.
- Describes a discount card as insurance.
- Steers you away from HealthCare.gov without asking about your income.
You can verify that an insurer and agent are licensed through your state insurance department. Most departments have an online lookup tool and a consumer complaint line.
How to read a short-term policy
Before you sign up, find these items in the policy document:
- The exact coverage start and end dates.
- The definition of a pre-existing condition and the look-back period.
- The deductible, coinsurance, and any per-condition maximums.
- Whether prescription drugs, mental health care, and emergency care are covered.
- The policy’s total benefit maximum.
- Whether the plan has a provider network and how out-of-network care is paid.
If any of these are unclear, ask the insurer in writing and keep the response.
Related reading: Medicare IRMAA: How Income-Related Surcharges Work and How to Appeal Them.
Frequently Asked Questions
How long can short-term health insurance last?
For policies sold on or after September 1, 2024, federal rules limit short-term plans to an initial term of up to three months and a total of four months with the same insurer within 12 months. Some states set even shorter limits or ban these plans.
Does short-term health insurance cover pre-existing conditions?
Usually not. Short-term plans can use medical underwriting and commonly exclude conditions that existed before coverage began. Some insurers review medical records after a claim to check.
Is short-term health insurance ACA-compliant?
No. Short-term plans are exempt from most ACA rules, so they do not have to cover essential health benefits, cap out-of-pocket costs, or accept applicants with health conditions.
Can I get a subsidy for a short-term plan?
No. Premium tax credits only apply to qualifying plans bought through the ACA marketplace. If you have lost other coverage, check your marketplace eligibility first.
What should I do if I lost my job-based health insurance?
Compare a marketplace plan through a special enrollment period, COBRA, and Medicaid before buying short-term coverage. You generally have 60 days after losing coverage to enroll in a marketplace plan or elect COBRA.
This article is for general informational purposes only and is not legal, medical, tax, or financial advice. Rules vary by state and change over time; confirm details with the relevant agency or a licensed professional.
