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🔒 '''Aggregate stop-loss''' is a [[Definition:Reinsurance | reinsurance]] or risk-transfer mechanism that caps the total amount of [[Definition:Claims | claims]] a [[Definition:Cedent | ceding insurer]], [[Definition:Self-insured entity | self-insured employer]], or [[Definition:Captive insurance company | captive]] must bear over a specified period — typically one year — by transferring liability for losses above a predetermined aggregate threshold to a [[Definition:Reinsurer | reinsurer]] or [[Definition:Stop-loss carrier | stop-loss carrier]]. While the concept shares structural DNA with [[Definition:Aggregate excess-of-loss reinsurance | aggregate excess-of-loss reinsurance]], the term "stop-loss" is especially prevalent in the [[Definition:Self-funded health plan | self-funded health insurance]] market, where employers retain the first layer of employee [[Definition:Medical claims | medical claims]] and use stop-loss contracts to contain catastrophic aggregate exposure.

⚙️ In a self-funded [[Definition:Group health plan | group health plan]], aggregate stop-loss coverage sets a corridor — often expressed as 125% of expected annual claims — beyond which the stop-loss carrier reimburses the employer for the excess. If an employer expects $10 million in total claims for the year, the aggregate stop-loss might attach at $12.5 million, covering losses above that level up to the [[Definition:Policy limit | contract limit]]. This differs from [[Definition:Specific stop-loss | specific stop-loss]], which addresses individual high-cost claimants. In the [[Definition:Reinsurance | reinsurance]] context, aggregate stop-loss treaties function similarly: a [[Definition:Primary insurer | primary insurer]] cedes cumulative retained losses above an agreed attachment, typically defined as a [[Definition:Loss ratio | loss ratio]] percentage, to the reinsurer. [[Definition:Actuarial science | Actuarial analysis]] of the underlying [[Definition:Loss distribution | loss distribution]] drives the pricing, and contracts frequently include [[Definition:Co-participation | co-participation]] provisions that require the cedent to share in losses above the attachment to maintain [[Definition:Underwriting discipline | underwriting discipline]].

📈 The strategic importance of aggregate stop-loss protection is most visible in volatile or uncertain environments. For self-insured employers, it converts an open-ended healthcare cost exposure into a budgetable maximum, which is often the deciding factor in choosing self-funding over fully insured [[Definition:Group insurance | group coverage]]. For [[Definition:Insurance carrier | carriers]] and [[Definition:Captive insurance company | captives]], aggregate stop-loss treaties smooth financial results across underwriting cycles, supporting consistent reporting to [[Definition:Rating agency | rating agencies]] and regulators. Demand has grown in recent years as medical inflation, high-cost specialty drugs, and [[Definition:Catastrophe event | catastrophe frequency]] have made aggregate outcomes harder to predict. [[Definition:Insurtech | Insurtech]] platforms that specialize in [[Definition:Stop-loss insurance | stop-loss]] distribution and analytics are bringing greater transparency and speed to a market traditionally negotiated through specialized [[Definition:Reinsurance broker | brokers]].

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Aggregate excess-of-loss reinsurance]]
* [[Definition:Specific stop-loss]]
* [[Definition:Self-funded health plan]]
* [[Definition:Excess-of-loss reinsurance]]
* [[Definition:Captive insurance company]]
* [[Definition:Loss ratio]]
{{Div col end}}

Definition:Aggregate stop-loss - Revision history

PlumBot: Bot: Creating new article from JSON