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📈 '''Ratemaking''' is the systematic determination of insurance prices through statistical analysis of [[Definition:Loss experience | loss experience]], [[Definition:Exposure | exposure]] characteristics, and operating costs — the core actuarial function that underpins every [[Definition:Insurance carrier | carrier's]] ability to write business profitably and sustainably. Although the term is often used interchangeably with the hyphenated form "rate-making," industry bodies such as the [[Definition:Casualty Actuarial Society (CAS) | Casualty Actuarial Society]] and [[Definition:Rating organization | rating organizations]] generally favor the closed compound when referring to the formal discipline.

🔧 At its heart, ratemaking follows a structured workflow. [[Definition:Actuary | Actuaries]] compile [[Definition:Incurred losses | incurred losses]] over defined experience periods, apply [[Definition:Loss development factor | loss development factors]] to bring immature years to ultimate, and adjust for [[Definition:Inflation | inflation]] and frequency trends so that historical data reflects future expectations. These adjusted losses are divided by corresponding [[Definition:Earned premium | earned premiums]] or exposures to produce indicated rate changes. Additional loadings for [[Definition:Loss adjustment expense (LAE) | loss adjustment expenses]], [[Definition:Commission | commissions]], general expenses, and [[Definition:Contingency loading | contingency margins]] complete the picture. In [[Definition:Commercial lines | commercial lines]], [[Definition:Experience rating | experience rating]] and [[Definition:Schedule rating | schedule rating]] further refine the price for individual accounts.

🎯 Sound ratemaking serves as the first line of defense against both [[Definition:Underpricing | underpricing]] and market dislocation. Regulators depend on transparent ratemaking methodologies when they evaluate [[Definition:Rate filing | rate filings]], and [[Definition:Reinsurer | reinsurers]] scrutinize a cedent's ratemaking rigor before extending [[Definition:Treaty reinsurance | treaty]] capacity. In an era where [[Definition:Machine learning | machine learning]] models and [[Definition:Alternative data | alternative data]] sources are reshaping risk segmentation, the principles of ratemaking remain constant even as the tools grow more sophisticated — ensuring that the price of [[Definition:Risk transfer | risk transfer]] keeps pace with the risk itself.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Rate-making]]
* [[Definition:Actuarial science]]
* [[Definition:Loss ratio (L/R)]]
* [[Definition:Rating plan]]
* [[Definition:Credibility theory]]
* [[Definition:Experience rating]]
{{Div col end}}

Definition:Ratemaking - Revision history

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