Short-Term Health Insurance vs. Health Sharing

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Short term health insurance and health sharing often get grouped together as “cheap ACA (Obamacare) plan alternatives” but they are very different. One is standard insurance designed to be temporary. The other isn’t insurance. It’s a cost-sharing membership with no time limit. Here’s how that difference plays out in practice.

What Is Short Term Health Insurance?

Short term, limited-duration insurance (STLDI) is real insurance — sold by licensed carriers — that’s specifically exempted from most ACA individual market requirements because it’s designed as temporary bridge coverage, not a long-term primary plan. That exemption is what allows it to deny coverage for pre-existing conditions and exclude essential health benefits.

How Long Can I be on a Short Term Health Plan?

Term limits for short term insurance plans have changed repeatedly and are currently up for debate again. Under 2018 federal rules, a short term plan could run up to 12 months initially and be renewed for a total of up to 36 months. A 2024 federal rule reduced that, limiting new short term plans to a 3-month initial term and 4 months total, including renewals. As of an August 2025 federal statement, the current administration announced it will not prioritize enforcement of that 2024 durational limit while a new rule is developed, expected sometime in 2026. States have also been given more latitude to set their own short term plan definitions in the meantime. In practice, this means the maximum duration you’ll be offered depends on your state and which insurer you’re shopping with. Confirm the specific term length directly with your plan provider.

Pre-existing Conditions: The Biggest Difference

This is the difference that matters most in practice. Insurers for short term plans can review your health history and deny coverage, exclude specific conditions, or charge more based on it, since short term plans aren’t bound by ACA rules. Pre-existing conditions are commonly excluded entirely and permanently under a short term policy.

Health sharing organizations generally don’t reject members based on pre-existing conditions. Most health share plans will accept you regardless of health history but will apply waiting periods and phased sharing caps for issues related to pre-existing conditions. See our waiting periods and pre-existing conditions guide for details but generally pre-existing conditions aren’t covered in your first year and are then covered in subsequent years with an increasing cap (e.g. $25K cap in year 2, $50K in year 3, etc.).

Coverage Scope

Short term plans, being exempt from ACA essential health benefit requirements, commonly exclude maternity care, mental health treatment, and prescription drug coverage, or offer only limited versions of them. Health share coverage varies by organization, but several secular options — including MPB Health’s plans — include all of those benefits depending on the plan you subscribe to.

Renewability

Short term plans generally aren’t guaranteed renewable in the way ACA plans are. If you develop a new health condition during your term, an insurer isn’t obligated to renew your policy at the end of the term, or may exclude the new condition going forward if they do. Health sharing memberships don’t work this way. Your ongoing membership isn’t contingent on staying healthy. Newly developed conditions will not be subject to the plan’s pre-existing condition rules at renewal time.

Cost

Both options are frequently marketed as low-cost alternatives to ACA insurance. Their lower cost is driven by how they handle pre-existing conditions relative to ACA plans. Pricing for each varies widely by provider, health status (for short term plans), and age but are generally in the same ball park. If cost is your primary driver you should get quotes for both short term plans and health share plans to compare for your specific situation.

Regulatory Status

Both sit outside standard ACA individual market regulation, but for different legal reasons. Short term plans are still regulated insurance, just specifically exempted from ACA-specific rules; state insurance departments generally do regulate short term plan carriers even though the plans skip ACA requirements. Health sharing isn’t insurance and operates under a completely separate nonprofit exemption. See our is health sharing legal guide for more details.

Who Each Option Tends to Fit

Short-term insurance tends to fit people who need coverage for a clearly defined, genuinely short gap (e.g. between jobs with a known start date, waiting out a specific enrollment window, etc.) and who are in good health and comfortable with the possibility of denial or exclusion based on that health history, and who don’t need maternity or robust mental health coverage during the gap.

Health sharing tends to fit people looking for a longer-term, potentially indefinite alternative to traditional insurance, who may have pre-existing conditions at enrollment even if it means accepting a waiting period on those conditions, and who value broader benefit categories like mental health and maternity care.

Bottom Line

Short term insurance and health sharing solve a similar budget problem through very different mechanisms — pre-existing exclusions and a hard time limit versus no exclusions but a waiting period on pre-existing conditions and no inherent time limit. Duration rules for short term plans are in flux right now which makes it a riskier long-term bet than it was a few years ago. If you’re looking for a true short bridge and you’re healthy, short-term insurance works well. If you want something you can stay on indefinitely without re-applying every few months, health sharing would be a better fit.