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Self-funding a group health plan puts an employer in the position of insurer — responsible for paying claims as they come in, with direct exposure to every high-cost event that hits the plan. For most employers, that exposure is manageable across the predictable middle of the claims distribution: routine office visits, generic prescriptions, standard outpatient procedures. What it is not designed to absorb without protection is the outlier — the premature infant in the NICU for four months, the employee diagnosed with stage III cancer, the worker who needs a CAR-T cell therapy treatment that carries a price tag exceeding $500,000.
Stop-loss insurance is the mechanism that converts that unbounded catastrophic exposure into a defined, budgetable risk. It is not optional for most self-funded employers — it is the structural foundation that makes self-funding viable in the first place. Yet a significant number of employers who carry stop-loss coverage don’t fully understand what they’ve bought: what triggers the coverage, where the gaps are, and whether their attachment points are actually calibrated to their risk tolerance and claims history.
This article covers the mechanics of both types of stop-loss coverage — specific and aggregate — how they work together, and the decisions that determine whether your stop-loss program is genuinely protecting your plan or just creating the appearance of protection.
Stop-loss insurance is a form of excess loss coverage purchased by self-funded employer health plans to protect against claims that exceed a defined threshold. It is a contract between the employer (as plan sponsor) and a stop-loss carrier — distinct from the health plan itself, which is a contract between the employer and plan members.
This distinction matters for a few reasons. Stop-loss insurance is not health insurance under the Affordable Care Act (ACA) and is not regulated as such. It is a commercial insurance product regulated at the state level under property and casualty or accident and health frameworks, depending on the state. The employer — not the employee — is the policyholder. Employees have no direct rights under the stop-loss contract; their rights are governed by the plan document.
Stop-loss coverage comes in two forms that address two distinct types of catastrophic risk: specific stop-loss, which caps the plan’s exposure to any single member’s claims, and aggregate stop-loss, which caps the plan’s total annual claims liability across the entire covered population. Most self-funded employers carry both. Understanding how each works — and where the gaps can appear — is essential to structuring a stop-loss program that actually does its job.
Specific stop-loss, also called individual stop-loss, protects the plan against catastrophically high claims from a single covered individual — an employee, a covered spouse, or a covered dependent.
The employer selects a specific deductible (also called the specific attachment point) — a dollar threshold above which the stop-loss carrier reimburses the plan for that individual’s claims. If an employee’s covered claims in a plan year exceed the specific deductible, the stop-loss carrier pays the amount above that threshold, up to the policy’s maximum benefit limit.
Example: A self-funded employer sets a specific deductible of $100,000. An employee is diagnosed with leukemia and incurs $380,000 in covered claims during the plan year. The employer’s plan pays the first $100,000. The stop-loss carrier reimburses the plan for the remaining $280,000. The employer’s net exposure for that individual is capped at $100,000.
The specific deductible is the most consequential decision in stop-loss design. Set it too low, and the employer pays excessive premiums for protection that kicks in at a level where claims are relatively common — reducing the financial efficiency of self-funding. Set it too high, and the employer retains more risk than the plan’s financial reserves can comfortably absorb.
Several factors inform the right specific attachment point for a given employer:
Plan size and covered lives. Larger plans with more covered members have more statistical predictability in their claims experience. A plan covering 1,000 employees can absorb a higher specific deductible than a plan covering 150, because the probability that multiple high-cost claimants hit in the same year is distributed across a larger pool.
Financial reserves and cash flow. The specific deductible represents the maximum the employer will pay for a single individual before stop-loss kicks in. That amount must be fundable from the plan’s operating cash flow or reserves without creating a liquidity problem. For smaller self-funded plans, this is often the binding constraint.
Claims history and risk profile. An employer with a workforce that includes several members managing high-cost chronic conditions — cancer, end-stage renal disease, hemophilia, premature infants — carries a higher probability of hitting specific stop-loss thresholds than an employer with a younger, healthier population. Claims history and actuarial analysis should inform the attachment point decision, not just premium benchmarking.
Industry benchmarks. Specific attachment points for mid-market self-funded employers (200–1,000 covered lives) commonly range from $75,000 to $200,000, with $100,000 to $150,000 representing the most common range. Smaller self-funded groups (under 200 lives) typically carry specific deductibles in the $50,000 to $100,000 range. These are benchmarks, not prescriptions — the right number depends on the employer’s specific financial position and risk tolerance.
When a stop-loss carrier identifies a covered individual with a known high-cost condition at renewal — a member currently undergoing chemotherapy, a dependent on dialysis, a premature infant still in the NICU — the carrier may impose a laser on that individual. A laser excludes that specific member from specific stop-loss coverage, or applies a substantially higher attachment point to their claims, for the upcoming policy year.
Lasers are legal and common. They are also one of the most significant financial risks in specific stop-loss renewal, because they can expose the plan to the full cost of a claim that was expected to be covered. Employers should understand their carrier’s lasering practices before binding coverage, negotiate anti-laser or laser-cap provisions where possible, and plan financially for the potential that one or more high-cost members will be lasered at renewal.
Aggregate Stop-Loss: Plan-Wide ProtectionWhile specific stop-loss caps per-individual exposure, aggregate stop-loss caps the plan’s total net claims liability for the entire covered population in a given plan year.
The employer selects an aggregate attachment point — calculated as a percentage (typically 110 to 125 percent) of the plan’s expected total claims for the year, based on actuarial projections. If the plan’s net claims (after specific stop-loss reimbursements) exceed the aggregate attachment point, the aggregate stop-loss carrier reimburses the plan for the excess, up to the policy’s maximum benefit.
Example: An employer’s actuarially projected claims for the plan year are $2,000,000. The aggregate attachment point is set at 125 percent of expected claims, or $2,500,000. During the plan year, the plan experiences an unusually high-claims year — multiple moderate-cost cases that don’t individually trigger specific stop-loss — and net claims reach $2,800,000. The aggregate stop-loss carrier reimburses the plan for the $300,000 excess above the $2,500,000 attachment point.
Specific stop-loss handles the catastrophic individual claim. Aggregate stop-loss handles a different risk: a year in which no single claim is catastrophic enough to trigger specific coverage, but the cumulative volume of moderate-to-high claims across many members drives total plan costs far above projections.
This scenario — sometimes called a “bad claims year” — is statistically more common than a single catastrophic claimant, particularly in mid-size plans. An influenza outbreak, a cluster of musculoskeletal surgeries, an uptick in mental health utilization, or a year with multiple preterm births can each contribute to aggregate claims running 20 to 30 percent above projections without any individual claim approaching the specific deductible.
Aggregate stop-loss converts that year-over-year variance risk into a defined maximum: the employer knows going into the plan year that its net claims liability, after both specific and aggregate coverage, will not exceed the aggregate attachment point.
Some stop-loss programs include an aggregating specific deductible — a provision that limits which claims count toward the aggregate attachment point calculation. Specifically, claims from individuals who have individually exceeded the specific deductible may be excluded from the aggregate calculation, because those claims are already being reimbursed by specific stop-loss coverage.
This provision affects how the aggregate attachment point functions in high-individual-claimant years. Employers reviewing stop-loss proposals should confirm how the aggregating specific deductible interacts with the aggregate calculation — it is a detail that can materially affect aggregate coverage in years where specific stop-loss is also triggered.
The most effective stop-loss programs use specific and aggregate coverage in combination, with attachment points calibrated to work as a system rather than as two independent policies.
Consider a self-funded employer with 400 covered lives, projected claims of $3,200,000, a specific attachment point of $125,000, and an aggregate attachment point at 120 percent of expected claims ($3,840,000).
In a year with one catastrophic claimant ($450,000 in claims) and otherwise normal aggregate experience:
In a year with no catastrophic individual claim but elevated aggregate experience (total claims of $4,100,000 due to high utilization across the population):
In a year with both a catastrophic individual claim and elevated aggregate experience:
This interaction — where specific stop-loss reimbursements reduce net claims that count toward the aggregate threshold — is why the two coverages must be structured as a system and evaluated together, not independently.
Beyond attachment points, several stop-loss policy terms have material financial implications:
Run-in and run-out provisions Stop-loss policies are written on either an incurred basis (covering claims incurred during the policy year, regardless of when they’re paid) or a paid basis (covering claims paid during the policy year, regardless of when they were incurred), or with various run-in and run-out periods that extend coverage for claims incurred before the policy period but paid within it, or vice versa. Mismatches between the plan’s claims payment cycle and the stop-loss policy’s coverage period can create gaps — claims that were incurred but paid after the policy expired, or claims from the prior year that the new policy doesn’t cover.
Maximum benefit limit Specific stop-loss policies carry a maximum benefit per claimant — often $1 million to $5 million, though some policies are unlimited. With specialty drug treatments and gene therapies now routinely exceeding $1 million, employers should confirm that their specific stop-loss maximum is sufficient for the most catastrophic plausible claim their plan could face.
Terminal liability (run-out) coverage If a self-funded employer terminates the plan or transitions to fully insured coverage, claims incurred during the self-funded period but not yet paid may not be covered by the new arrangement. Terminal liability coverage or a run-out extension under the stop-loss policy covers those pending claims. Employers considering a transition from self-funding should account for this exposure.
Accommodation provisions Some stop-loss policies include provisions that allow the carrier to modify attachment points or exclude members at renewal — beyond standard lasering — in response to adverse claims experience. Understanding these provisions before binding coverage is essential to assessing the true stability of the stop-loss program.
Neither. They protect against fundamentally different risks, and a self-funded employer who carries only one has an incomplete program.
That said, the relative priority depends on employer size. For smaller self-funded employers — under 150 covered lives — the catastrophic individual claimant is typically the existential financial risk, making specific stop-loss the more critical coverage. Aggregate stop-loss provides meaningful protection but is statistically less likely to be triggered at small group sizes, where individual high-cost claimants drive total claims variance more than population-level utilization trends.
For larger self-funded employers — 500 or more covered lives — specific stop-loss remains essential, but aggregate exposure becomes more complex to model and more important to manage carefully, because population-level utilization trends become a larger driver of total plan cost variance.
Stop-loss programs should be formally reviewed at every renewal — not simply renewed at prior-year terms. Specific triggers for a more thorough reassessment include:
Stop-loss is not a set-and-forget purchase. The employer whose stop-loss attachment points were right for a 200-person plan three years ago may be significantly underinsured today if the company has grown to 400 employees without a corresponding review of coverage structure.
Specific and aggregate stop-loss are not interchangeable products that serve the same purpose — they are complementary protections that together define the financial boundaries of a self-funded plan. Specific coverage handles the catastrophic individual. Aggregate coverage handles the catastrophic year. Together, they convert self-funding from an open-ended financial exposure into a defined, plannable cost structure.
The decisions that determine whether that protection is real — attachment point selection, lasering provisions, run-in and run-out terms, maximum benefit limits — require analysis, not just premium shopping. Employers who approach stop-loss as a commodity purchase and select coverage on price alone routinely discover the gaps when a claim that should have been covered falls outside their policy’s terms.
Taylor Benefits Insurance Agency works with self-funded and level-funded employers to design stop-loss programs that provide genuine financial protection — with attachment points calibrated to actual risk profiles, not just market averages. If you’re reviewing your stop-loss structure or moving to self-funding for the first time, contact our team to understand what protection you actually need.
* Actual stop-loss premiums, attachment points, and coverage terms vary by carrier, group size, claims history, industry, and geographic location. Consult a qualified benefits advisor and legal counsel when designing or reviewing your stop-loss program.
Employers choose attachment points based on how much risk they are willing to absorb versus pay in premiums. Lower attachment points mean higher premiums but quicker protection from claims. Higher attachment points reduce premiums but increase out-of-pocket exposure before coverage begins. The decision usually depends on company size, cash flow strength, and confidence in employee health risk levels.
Todd Taylor oversees most of the marketing and client administration for the agency with help of an incredible team. Todd is a seasoned benefits insurance broker with over 35 years of industry experience. As the Founder and CEO of Taylor Benefits Insurance Agency, Inc., he provides strategic consultations and high-quality support to ensure his clients’ competitive position in the market.
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