Choosing how to fund an employee health plan is one of the most consequential decisions an employer can make. At a high level, most employer‑sponsored plans fall into one of two categories: fully‑insured or self‑insured (self‑funded). While the distinction sounds technical, the implications for cost, risk, transparency, and flexibility are very real.
Understanding how these models work—and how newer self‑insured options fit between them—helps employers align their health plan with their goals, risk tolerance, and workforce.
What Does “Fully‑Insured” Mean?
A fully‑insured health plan is the traditional model. The employer pays a fixed premium to an insurance carrier, and the carrier assumes responsibility for paying medical claims that fall within the policy’s coverage terms. Costs are predictable, administration is largely handled by the insurer, and financial risk is transferred away from the employer. [peoplekeep.com], [sbmabenefits.com]
Why employers choose fully‑insured plans
- Stable, predictable monthly costs
- Minimal administrative responsibility
- Protection from claim volatility
Trade‑offs
- Limited visibility into claims data
- Little ability to customize plan design
- Premiums include insurer margins and risk charges
Fully‑insured plans tend to appeal to organizations that value simplicity and budget certainty, particularly smaller employers or those with limited tolerance for year‑to‑year variability.
What Does “Self‑Insured” Mean?
Under a self‑insured (or self‑funded) plan, the employer retains financial responsibility for employee medical claims. Instead of paying premiums, the employer pays claims as they occur and typically hires a third‑party administrator (TPA) to handle claims processing, networks, and compliance. Because claims can be unpredictable, most self‑insured employers also purchase stop loss insurance to limit exposure to large or catastrophic claims. [sbmabenefits.com], [npabenefits.com]
Why employers consider self‑insured plans
- Greater control over plan design
- Access to detailed claims and utilization data
- Potential savings when claims are lower than expected
- Ability to tailor benefits to workforce needs
Trade‑offs
- Variable cash flow as claims fluctuate
- More responsibility for oversight and governance
- Greater exposure to risk if poorly structured
Self‑insurance is less about avoiding risk and more about choosing how and where to retain it.
Self‑Insured Is Not One‑Size‑Fits‑All
Importantly, self‑insured plans sit on a spectrum, not a single structure. Over time, the market has evolved to offer options that balance predictability and risk retention in different ways. Three of the most common structures are Traditional Stop Loss, Level‑Funded plans, and Captives.
Traditional Stop Loss: The Core Self‑Insured Model
In a traditional self‑insured arrangement, the employer:
- Pays claims directly up to a pre‑set deductible
- Purchases specific stop loss (per‑member protection) and/or aggregate stop loss (total plan protection)
- Transfers only truly catastrophic risk to the insurance market [sbmabenefits.com]
This model offers the highest level of transparency and customization, but also the widest range of financial outcomes year‑to‑year.
Best suited for
Employers with sufficient scale, stable populations, and comfort managing variability over time.
Level‑Funded Plans: A Middle Ground
Level‑funded plans blend fully‑insured budgeting with self‑insured mechanics. Employers pay a fixed monthly amount, similar to a premium, which is allocated to:
- Expected claims
- Administrative costs
- Embedded stop loss protection
If claims are lower than expected, some arrangements allow the employer to share in surplus; if claims are higher, stop loss caps the downside. [uhc.com], [lfgben.com]
Why employers use level funding
- Predictable monthly payments
- Reduced volatility compared to full self‑insurance
- More insight into claims than fully‑insured plans
Best suited for
Smaller or mid‑sized employers that want more control and transparency but are not ready for full claim volatility.
Captives: Structuring Volatility Over Time
Captives take self‑insurance a step further by formally pooling risk—either within a single organization or across a group of employers—inside a licensed insurance vehicle. Instead of transferring all volatility to the annual stop loss market, captives allow employers to retain and share specific layers of risk intentionally, often supplemented by excess reinsurance for catastrophic claims. [mslcaptives.com], [artexrisk.com]
Why captives are gaining attention
- Ability to smooth volatility over multiple years
- Alignment of capital with actual risk
- Shared underwriting results when performance is favorable
- Greater transparency and governance
Best suited for
Employers seeking long‑term stability, predictability across renewal cycles, and an ownership approach to healthcare risk rather than a purely transactional one.
Who Should Consider Each Model?
There is no universally “best” model—only one that fits an employer’s objectives.
- Fully‑Insured: Employers prioritizing administrative ease and cost certainty
- Level‑Funded: Employers transitioning away from fully‑insured while managing risk conservatively
- Traditional Self‑Insured with Stop Loss: Employers ready to assume variability for greater control
- Captives: Employers focused on long‑term risk structuring and multi‑year stability
The decision is not about moving left or right on the spectrum—it’s about matching risk strategy to organizational readiness.
Closing Thought
Fully‑insured and self‑insured plans represent different philosophies, not just different funding mechanisms. As healthcare costs grow more volatile, many employers are re‑examining where risk truly belongs and how best to manage it.
Understanding the full range of self‑insured structures—from level funding to captives—allows employers to move beyond annual renewal decisions and toward a more strategic, sustainable approach