Last week we looked at why the fully insured pool has been shrinking and what that may mean for 2027 renewals. The question that naturally follows is whether self-funding is a realistic option for an employer of a certain size. Many owners and CFOs hear the term and assume it is reserved for large corporations with dedicated benefits departments and deep cash reserves.
The data suggests otherwise. The 2025 KFF Employer Health Benefits Survey found that 27 percent of covered workers at firms with 10 to 199 workers are enrolled in self-funded plans, compared with 80 percent at larger firms. Self-funding is far more common at smaller employers than most people assume. The more useful question is not whether a group is big enough. It is whether the group is a good fit.
What Self-Funding Means in Practice
In a self-funded arrangement, the employer pays employee health claims directly as they occur rather than paying a fixed premium to a carrier. A third party administrator processes claims, a network provides access to discounted rates, and a stop-loss carrier protects the employer against claims that run unusually high. We covered the structure in detail in our earlier guide to every major structural option, so this post focuses on the question of fit.
Why Size Matters, and Why It Is Not the Whole Answer
Covered Lives Matter More Than Headcount
Self-funding is measured in covered lives, which means employees plus any enrolled spouses and children. A company with 70 enrolled employees may have well over 100 covered lives once dependents are counted. The more lives in the pool, the more predictable claims become, because no single member can dominate the total. In a smaller pool, a handful of high-cost claims can account for a very large share of annual spending.
What Stop-Loss Changes
Stop-loss insurance is the mechanism that makes self-funding workable for groups that are not large. Specific stop-loss caps what the employer pays for any single individual in a plan year. Aggregate stop-loss caps total claims for the group, and the aggregate attachment point is commonly set at around 120 to 125 percent of expected claims. Together, these 2 layers define the most an employer can be asked to pay in a given year, which turns an open-ended risk into a known maximum.
Stop-loss is not a guarantee against surprises, however. It is underwritten and renewed each year, so the terms and pricing can change based on how the group performs, and the policy language determines exactly what is covered and when.
Where Group Size Fits
There is no official minimum. In practice, the conversation becomes more realistic as a group approaches 50 to 75 covered lives and above, and it tends to get easier as the pool grows. Below that range, a level-funded arrangement often fits better because it offers some of the same upside with more predictability. At 100 covered lives and beyond, self-funding is a serious option for many employers, but whether it is the right option depends on factors beyond size.
Beyond Size: What Actually Determines Fit
Employers with the same number of covered lives can be very different candidates. These are the factors that tend to matter most.
- Claims history and demographics. A group with stable, favorable experience and a workforce profile that is not unusually high risk is a stronger candidate than one with several known large claimants.
- Cash flow tolerance. Claims are paid as they occur, so month to month spending will vary, and the employer needs the financial flexibility to absorb that variation.
- Leadership comfort with variability. A favorable year can produce meaningful savings, while an unfavorable year costs more than expected. Decision makers need to be comfortable with both outcomes before committing.
- Workforce stability. Groups with steady headcount and consistent enrollment are easier to project than groups with significant turnover or rapid growth.
- Willingness to engage. Employers who review claims data, ask questions, and act on what they learn capture far more of the value than employers who treat self-funding as a set it and forget it arrangement.
The Risks Employers Should Understand Before Moving
Lasering at Renewal
At renewal, a stop-loss carrier may assign a higher specific deductible to an individual with a known high-cost condition, which is commonly called a laser. A laser can leave the employer carrying far more risk for that person than the headline specific deductible suggests. Employers should ask about lasers before they sign, not after the initial renewal.
Month to Month Variability
A self-funded plan will not produce the same claims bill every month. A group can have a very quiet quarter followed by a very expensive one. Employers who budget for the full year rather than for any single month, and who hold a reasonable reserve, handle this far better than those who are surprised by it.
Renewals Follow Experience
A strong initial year does not guarantee a strong renewal, and a difficult year can lead to higher stop-loss pricing and tighter terms. Self-funding rewards employers who manage their plan actively over several years, rather than those who evaluate it only at a single point in time.
Who Self-Funding Tends to Fit, and Who It Does Not
Self-funding tends to fit employers with stable, reasonably healthy claims experience, sufficient financial flexibility, and a genuine interest in understanding where their health spending goes. It is also a strong fit for employers who want greater control over plan design and direct access to their own data.
It tends to fit less well for employers who need complete budget certainty, who have several known high-cost claimants, who have limited financial flexibility, or who prefer to hand off the plan entirely. For those groups, a fully insured or level-funded arrangement may be the better choice, and there is nothing wrong with reaching that conclusion after a careful look.
Questions to Ask Before Considering Self-Funding
Whether your group is a realistic candidate comes down to the details. These are the questions worth putting to your advisor.
- Has your advisor modeled your group’s worst realistic year, not just the expected year?
- Do you know the specific and aggregate stop-loss terms being proposed, and how they compare with your own claims history?
- Has anyone explained laser risk, and how stop-loss renewals are handled after a high-cost year?
- Do you understand how the stop-loss contract treats claims incurred during the plan year but paid after it ends?
- Who will administer claims and report on them, and how will you see where your money is going each month?
- Has your advisor presented level-funded and fully insured alternatives with the same level of detail?
At Cypress Benefit Solutions, we believe the right funding arrangement depends on a group’s claims, cash flow, and appetite for engagement rather than on a headcount cutoff. If you want to know whether your group is a realistic candidate for self-funding, we would welcome the opportunity to model it with you ahead of your next renewal.
