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📉 '''Annual aggregate deductible (AAD)''' is a cumulative [[Definition:Deductible | deductible]] threshold that an [[Definition:Insured | insured]] — or, in [[Definition:Reinsurance | reinsurance]] arrangements, a [[Definition:Ceding company | ceding company]] — must absorb in total losses over a policy year before the [[Definition:Insurance carrier | carrier]] or [[Definition:Reinsurer | reinsurer]] begins to respond. Unlike a per-occurrence deductible, which resets with every individual claim, the AAD accumulates all qualifying losses across the entire period. Once the aggregate of retained losses crosses the AAD, subsequent losses (or the portion above the AAD) become recoverable, subject to any per-occurrence terms and the policy's [[Definition:Policy limit | overall limit]].

🔧 Consider a commercial [[Definition:Property insurance | property]] program with a per-occurrence deductible of $50,000 and an AAD of $500,000. Each individual loss still carries the $50,000 per-occurrence retention, but the insurer does not pay anything until the insured has absorbed $500,000 in aggregate retained losses during the year. After that aggregate threshold is reached, the insurer begins reimbursing losses above the per-occurrence deductible. In [[Definition:Excess of loss reinsurance | excess-of-loss reinsurance]], an AAD functions similarly: the ceding company retains an aggregate layer of net losses before the reinsurance contract attaches. Pricing an AAD requires [[Definition:Actuarial analysis | actuarial]] simulation of loss frequency and severity together, because the likelihood of breaching the aggregate depends on how many claims occur and their individual sizes — not just the tail of a single loss distribution. Regulatory reporting frameworks in various jurisdictions require clear disclosure of aggregate deductible structures within [[Definition:Technical provisions | technical provisions]] and [[Definition:Risk management | risk-management]] filings.

💰 From a strategic standpoint, an AAD allows the insured to retain predictable, high-frequency losses while still securing protection against an abnormally costly year. This self-insurance of the expected loss layer often yields meaningful [[Definition:Premium | premium]] savings compared to a program with no aggregate retention, because the insurer no longer bears the near-certain portion of annual losses. For insurers and reinsurers, attaching an AAD to a contract reduces [[Definition:Loss ratio | loss-ratio]] volatility and concentrates their exposure on the less predictable, higher-severity portion of the risk. Large corporate buyers, [[Definition:Captive insurance company | captive]] programs, and [[Definition:Self-insured retention (SIR) | self-insured]] organizations frequently employ AADs as a cornerstone of their [[Definition:Risk financing | risk-financing]] strategy, balancing retention capacity against the cost of transferring risk.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Deductible]]
* [[Definition:Self-insured retention (SIR)]]
* [[Definition:Annual aggregate limit (AAL)]]
* [[Definition:Aggregate stop loss]]
* [[Definition:Excess of loss reinsurance]]
* [[Definition:Risk financing]]
{{Div col end}}

Definition:Annual aggregate deductible (AAD) - Revision history

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