What is Aggregate Stop Loss?
Aggregate stop loss (also called aggregate excess) is reinsurance that protects an employer-sponsored self-funded plan from excessive total claims during a policy period. Instead of covering a single large claim, it triggers when cumulative claims for the group exceed a predetermined attachment point. For more detailed variations and structures, see Stop Loss Excess Aggregate Insurance.
Who needs it
Organizations that self-fund health benefits—employers, associations, unions and some small organizations—use aggregate stop loss to limit volatility and budget risk. Third-party administrators, plan sponsors and benefits consultants often evaluate whether a group should add aggregate protection alongside specific stop-loss or medical stop-loss coverage such as Medical Stop-Loss Insurance.
What it typically covers
Aggregate stop loss pays only after the plan’s total paid claims exceed the aggregate attachment point. Typical covered claim types include major medical, inpatient and outpatient services, and large pharmacy claims; it generally does not extend to unrelated liability lines like commercial liability or property coverage. A common scenario: a small employer faces many moderate-to-large claims in one year (e.g., several costly surgeries) and the aggregate policy limits the employer’s total exposure.
Common exclusions or limitations
Policies commonly exclude or limit coverage for pre-existing conditions, intentional acts, fraud, stop-loss attachment manipulation, and expenses outside the defined claim period. Network discounts, rebates, and coordination with other coverages (for example, participant accident or event liability) can affect how much the insurer recognizes as covered claims. Read policy wording closely to understand carve-outs and definitions.
Factors that influence cost
Underwriting factors that drive premium include group size, demographics, recent claim history, plan design (deductibles and coinsurance), chosen aggregate attachment point, and how closely the plan controls utilization. Risk management—wellness programs, case management, and care coordination—can reduce expected claims and lower renewal pricing. Transportation risks, facility risks, and equipment-related exposures can matter where they influence medical claim frequency.
Proof of insurance & compliance
Carriers issue certificates or evidence-of-coverage documents describing policy terms, limits and the aggregate attachment point. Employers should keep current certificates for audits and to satisfy auditors or partners; some third-party administrators request policy language to confirm scope. Requirements vary by state and by contract, so review wording with your broker or plan counsel before assuming compliance.
How to get a quote
To obtain a quote, assemble recent medical paid-claim runouts, plan enrollment by age and tier, current stop-loss policy (if any), and any risk-management programs in place. If you need help comparing options or placing coverage, ask your agent for assistance—brokers can source multiple aggregate and specific stop-loss structures and explain trade-offs.
Frequently Asked Questions
How does aggregate stop loss differ from specific stop loss?
Specific stop loss protects against individual high-dollar claims above a per-person attachment point, while aggregate stop loss protects against the plan’s total claims exceeding a group-level attachment point.
Will aggregate stop loss cover all plan expenses?
No. Coverage applies only to claims defined by the policy and during the policy period; exclusions, contract definitions and coordination with discounts or rebates can reduce recoverable amounts.
Can small employers buy aggregate protection?
Some carriers offer aggregate options for smaller groups, but pricing and minimum attachment points vary. A broker can help evaluate whether an aggregate policy is cost-effective given group size and claims history.
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