How do level-funded health plans compare to fully insured for employer costs?

For employers weighing their group health insurance options, the cost comparison between level-funded and fully insured plans often becomes the deciding factor. At a high level, a level-funded plan combines the predictable monthly payments of a fully insured model with the potential savings and data transparency of self-funding. A fully insured plan locks in a fixed premium, transferring all claims risk to the carrier in exchange for a known, often higher, cost. The true financial difference lies in what happens when your employees' claims are lower than expected-and how much control you have over the levers that drive those costs.

Core Cost Mechanics: How Each Model Works

Understanding the cost comparison requires looking beneath the surface of the monthly bill. Here's how each plan structure channels employer dollars:

• Fully insured plans: You pay a fixed per-employee premium each month. That premium is the carrier's estimate of your group's expected claims, plus administrative fees, taxes, stop-loss premiums, and a risk charge for the insurer. The premium resets annually based on your group's actual claims experience. If claims are low, the carrier keeps the surplus; if high, your renewal rate spikes.
• Level-funded plans: You pay a consistent monthly amount that is actually a bundle: a claims-funding target (the expected claims amount for your group), an administrative fee, and stop-loss insurance to cap catastrophic claims. The claims fund is not a premium-it's your money, held in a dedicated account to pay employee claims. At the end of the plan year, any unused claims funds are either returned to you as a surplus or applied to reduce future costs, depending on the contract. The stop-loss policy protects against individual claims over a certain threshold (e.g., $30,000) and aggregate excess claims over the year.

Direct Cost Comparison: Where the Savings Appear

When an employer moves from fully insured to level-funded, the immediate cost difference can be 5-20% lower than a comparable fully insured quote for the same benefits. The savings stem from several tangible factors:

1. Elimination of premium tax: Fully insured premiums include a state premium tax (typically 2-3% of the premium). As the level-funded claims fund is not a premium, self-funded arrangements avoid this tax in most states, directly reducing cost.
2. Lower risk charges: Insurers build a profit margin and contingency into fully insured rates. In level-funded, the stop-loss carrier charges a risk premium, but it's often lower than a fully insured carrier's blended risk charge because you're not paying for a guaranteed premium rate over the entire year.
3. Surplus return potential: This is the headline advantage. If your group's claims run favorably, the unspent claims fund typically returns a significant portion (often 50-100% depending on contract terms) to the employer. For a group with a $500,000 claims target and $420,000 in actual claims, $80,000 minus any sharing formula could come back to the business. Fully insured offers no such refund.
4. Removal of manual rate adjustments: Fully insured renewals blend your group's experience with a carrier's entire book of business. Level-funded renewal is based primarily on your own claims trend, so you don't subsidize other companies' poor experience. If you manage your plan well, your costs reflect that directly.

Cost Risks and Hidden Variables You Must Plan For

Level-funded plans are not without financial exposure. The promise of savings assumes your group's health risk profile is stable or better than average. Employers must evaluate these risk factors:

• High claims erode the fund: If claims exceed the funding target but stay within the aggregate stop-loss attachment point, the employer is responsible for the deficit. This is the self-funded corridor. The aggregate stop-loss policy kicks in only after claims surpass a set percentage (e.g., 125%) of the expected claims. A year with several moderate claims can push you into that corridor before stop-loss triggers.
• Cash flow requirements: While monthly payments are fixed, the carrier must have timely access to funds for claims. Smaller groups need to ensure they can manage the volatility of claim payments within the fund, though administrators handle the flow. However, if the fund is drawn down faster than expected early in the year, the monthly payment may need to be adjusted (though this is rare with proper stop-loss placement).
• Terminal liability: If you exit level-funded mid-year or decide not to renew, you are still responsible for claims incurred during the coverage period (run-out claims). Most contracts include a terminal liability period (e.g., 3 months), and you may need to pay a final premium to cover claims that occur but aren't filed until after the plan terminates. Fully insured plans do not have this tail risk; you simply stop paying premiums.
• Compliance costs: Level-funded plans are self-insured for ERISA purposes, triggering additional compliance obligations like Form 5500 filing, SPD distribution rules, and possibly non-discrimination testing if you carve out benefits. These administrative burdens can add modest internal or external support costs compared to a fully insured plan where the carrier typically handles more compliance tasks.

Who Wins on Cost: A Practical Profile Comparison

The cost advantage depends heavily on group size, demographics, and risk tolerance:

• Small firms (20-50 employees) with relatively young, healthy workforces often see the most dramatic savings with level-funded. Their claims are typically stable and well below the funding target, maximizing surplus returns. The stop-loss protection is robust, and the monthly payment is competitive against fully insured rates that mark up for small-group risk pools.
• Mid-size employers (50-200 employees) can benefit from deeper data analytics (usually via an integrated TPA or carrier platform) to target wellness and care management. With level funding, they can use claims data to drive down costs over time, something opaque fully insured reports rarely provide. Over 3-5 years, the compound savings can be substantial.
• Groups with a few high-cost claimants may initially fare worse under level-funded if the claims exceed the funding target. However, if the stop-loss policy is well-structured with a low individual specific deductible, the employer can actually cap the impact of those large claims while still benefiting from surplus on the rest of the population. The key is to model scenarios carefully.

Fully insured remains the safer choice for employers who cannot tolerate any claims volatility, lack the administrative bandwidth to oversee a self-funded arrangement, or have a workforce with a claims history that consistently drives renewal increases. There is no surplus to gain, but there is also no deficit to fund.

Actionable Steps for a True Cost Comparison

To make a data-driven decision, take these specific actions with your broker or benefits consultant:

1. Request a level-funded quote with full stop-loss specifications: You need to see the specific deductible, aggregate attachment point, and contract terms (e.g., terminal liability, surplus-sharing percentage).
2. Run a claims simulation: Using your recent 12-24 months of claims data (and Rx), model a "good year" and a "bad year" against the level-funded proposal to visualize the range of total cost-monthly funding, plus any potential deficit or surplus.
3. Compare total projected cost, not just monthly payment: Include the value of surplus return in good years, the risk of deficit in bad years, and any added administrative or compliance costs.
4. Evaluate carrier-provided wraparound services: Many level-funded products now bundle wellness, telemedicine, and care navigation that can reduce claims. Factor these into overall plan cost management.
5. Check regulatory stability in your state: Some states have specific rules for level-funded plans, particularly for small groups. Confirm that the product is filed as a stop-loss policy and that the surplus return mechanism complies with state insurance law.

For the right employer, level-funded plans consistently deliver lower net costs over time by transforming the employer from a premium payer into an active manager of health plan spend. Fully insured plans, while simpler, come at the price of lost surplus opportunity and minimal insight into what's driving your second-largest expense. The most cost-effective answer isn't universal-it's the one that aligns with your risk capacity, claims profile, and long-term benefits strategy.