Everything mid-size and growing employers need to know about self-funding, including level-funded arrangements, stop-loss insurance, TPA selection, and the financial advantages and risks of paying claims directly.
Guide
Self-Funded Health Plans: A Complete Guide
Self-funding, also called self-insurance, is a benefits financing strategy where the employer assumes direct financial responsibility for paying employee health claims rather than purchasing a fully insured policy from an insurance carrier. Approximately 65 percent of covered workers in the United States are enrolled in self-funded plans, and the approach is increasingly accessible to mid-size employers through level-funded arrangements that combine self-funding economics with cash flow predictability. Understanding the mechanics, risks, and advantages of self-funding is essential for employers evaluating their benefits financing strategy.
Fully Insured vs. Self-Funded: Key Differences
In a fully insured arrangement, the employer pays a fixed monthly premium to an insurance carrier, and the carrier assumes all financial risk for covered claims. The premium is set based on the carrier's assessment of the group's risk profile, plus administrative expenses, profit margin, and state premium taxes. Once the premium is paid, the employer's financial obligation is fulfilled regardless of how much or how little the group uses in medical services during the plan year.
In a self-funded arrangement, the employer pays claims as they are incurred using its own funds. The employer contracts with a third-party administrator to process claims, manage the provider network, handle member services, and provide utilization management. The employer also purchases stop-loss insurance to cap its exposure to catastrophic claims. The employer's total cost equals actual claims paid plus TPA fees, stop-loss premiums, and other administrative costs.
The fundamental economic difference is that self-funded employers retain the underwriting risk and reward. In a year when claims are lower than expected, the self-funded employer keeps the savings rather than paying them to a carrier as profit. In a year when claims are higher than expected, the self-funded employer bears the excess cost, though stop-loss insurance limits the downside. Over time, employers with well-managed self-funded plans typically realize savings of 5 to 15 percent compared to fully insured alternatives, primarily by avoiding carrier profit margins, state premium taxes, and the risk charges embedded in fully insured rates.
Level-Funded Plans: A Middle Ground
Level-funded plans are a hybrid arrangement designed to make self-funding accessible to smaller employers. Under a level-funded plan, the employer makes fixed monthly payments to a carrier or TPA that are structured similarly to fully insured premiums. These payments cover expected claims, stop-loss insurance premiums, and administrative fees. However, unlike a fully insured plan, the employer is technically self-funding the claims and purchasing stop-loss coverage to cap the downside.
The key advantage of level-funding for small and mid-size employers is cash flow predictability. Monthly payments are fixed and known in advance, eliminating the month-to-month claims volatility that makes traditional self-funding challenging for employers without significant cash reserves. If actual claims come in below expected levels, most level-funded arrangements return a portion of the surplus to the employer. If claims exceed expectations, the stop-loss insurance covers the excess.
Level-funded plans are typically available to employers with as few as 10 to 25 employees, depending on the carrier and market. They offer most of the advantages of self-funding, including access to claims data, exemption from state health insurance mandates under ERISA preemption, and the potential for claims surplus refunds. However, the stop-loss attachment points and corridor provisions in level-funded plans may be more conservative than those available to larger self-funded groups, reflecting the greater claims volatility inherent in smaller populations.
Stop-Loss Insurance Essentials
Stop-loss insurance is the risk transfer mechanism that makes self-funding viable for most employers. There are two types of stop-loss coverage: specific stop-loss, which caps the employer's exposure on any single claimant, and aggregate stop-loss, which caps the employer's total claims exposure for the entire group over the plan year.
Specific stop-loss, also called individual stop-loss, reimburses the employer when claims for a single covered individual exceed a predetermined deductible level, called the specific attachment point. Common specific attachment points range from $50,000 to $250,000 or more depending on group size and risk tolerance. The employer pays claims up to the attachment point for each individual, and the stop-loss carrier reimburses claims above that level. Employers with larger employee populations can generally accept higher specific attachment points because they have a more stable and predictable claims distribution.
Aggregate stop-loss protects the employer when total group claims for the plan year exceed a predetermined threshold, typically set at 120 to 125 percent of expected claims. This coverage provides a ceiling on the employer's total annual claims exposure, protecting against a scenario where many employees simultaneously incur moderate to high claims that individually fall below the specific attachment point but collectively exceed the budget. Aggregate stop-loss is essential for smaller self-funded groups where the aggregate claims distribution has higher variance.
Selecting a Third-Party Administrator
The TPA is the operational backbone of a self-funded plan, responsible for claims adjudication, network access, member services, utilization management, and compliance support. Selecting the right TPA is one of the most consequential decisions in establishing a self-funded plan because the TPA's performance directly impacts claims costs, employee experience, and administrative efficiency.
Evaluate TPA candidates on several key dimensions. Network access and discount levels determine the prices your plan pays for medical services and directly affect claims costs. Claims processing accuracy and turnaround time affect both employee satisfaction and financial accuracy. Utilization management capabilities, including prior authorization, case management, and disease management programs, influence the overall cost trend. Technology platforms for eligibility management, member portals, and employer reporting determine the day-to-day administrative experience.
Request references from current clients of similar size and industry, and ask specifically about claims accuracy rates, customer service responsiveness, reporting quality, and the TPA's track record on cost management. Negotiate transparent fee arrangements that clearly separate administrative fees from claims costs, and ensure you have contractual rights to full claims data, including line-level detail, to support ongoing plan management and renewal analysis. Transitioning TPAs is disruptive, so invest the time upfront to select a partner that will serve your needs over a multi-year relationship.
Is Self-Funding Right for Your Organization?
Self-funding is generally most advantageous for employers with at least 50 to 100 employees, a stable workforce with reasonably predictable demographics, adequate cash reserves or credit facilities to absorb claims fluctuations, and the organizational sophistication to manage a more complex benefits arrangement. Level-funded options have lowered the size threshold, making self-funding viable for groups as small as 10 to 25 employees in many markets.
The primary financial argument for self-funding is the elimination of carrier profit margins and state premium taxes. Fully insured premiums include a carrier profit and risk charge of 3 to 8 percent and state premium taxes of 2 to 4 percent, none of which apply to self-funded claims. Over time, these savings compound, particularly for employers with better-than-average claims experience who were previously subsidizing higher-risk groups in the fully insured risk pool.
The primary risk of self-funding is claims volatility. In any given year, actual claims may exceed expected levels, requiring the employer to fund the difference up to the stop-loss attachment point. Employers considering self-funding should model best-case, expected, and worst-case claims scenarios over a three to five year horizon to understand the range of possible outcomes. Your broker or benefits consultant can help construct these models using your group's actual claims data and appropriate actuarial assumptions.
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