Executive Summary: The 6-to-15 Sweet Spot: Where Level Funded Starts Working and Why

LFP-04.03 — The 1-to-50 Market

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At 6 to 15 lives, level funded becomes viable. The shift is actuarial: stop loss premium as a percentage of expected claims decreases meaningfully as group size increases. Practitioners consistently observe that at 3 lives, stop loss premium may represent 45% to 55% of expected claims; at 10 lives, that share drops to 25% to 35% for a healthy group; at 15 lives, to 20% to 28%. Each incremental life added narrows the claims variance, reducing the risk charge that dominates stop loss premium at micro-group sizes. Surplus return becomes meaningful in absolute dollar terms: a 12-person group running 15% below expected claims on a $360,000 expected total might see $40,000 to $50,000 returned, a real sum for a small employer. This is the size range where level funded market penetration is growing fastest and where the product delivers its value proposition most clearly.

Not every 6-to-15-life employer is a good candidate. The employer profile that works combines favorable demographics (average age below 45, no known high-cost claimants), financial reserves sufficient to absorb a moderate adverse year, and an engaged point person who can work with claims data and the annual renewal process. An employer seeking purely passive cost management with no deficit tolerance is better served by fully insured. The most common conversion path into level funded for this segment is an unfavorable fully insured renewal: the employer receives a 15% to 25% rate increase, the broker presents level funded as an alternative, and the comparison favors level funded both on current-year cost and on the upside potential of surplus return.

Plan design at this size is standardized. Most TPAs offer 2 to 4 plan options with set deductibles, coinsurance structures, and out-of-pocket limits. Custom plan design is not economically justified when the administrative cost of a bespoke benefit structure is spread across 10 members. Common structures run deductibles from $2,000 to $6,000 individual with 80/20 coinsurance. The employer accepts the standardized menu in exchange for level funded economics: claims transparency, surplus potential, and ERISA preemption from state mandates.

The risks at this size remain significant. Claims can swing 30% to 50% above expectations from a single pregnancy complication, cancer diagnosis, or acute trauma. A lasered member at renewal, where the stop loss carrier imposes a higher individual attachment point on a known high-cost condition, can gut the economic rationale for a group this small. An employer who understands these risks going in, treats level funded as a multi-year relationship rather than an annual procurement comparison, and works with a broker who can interpret claims data and stop loss proposals at renewal is positioned to compound the advantage over time.