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📝 '''Actuarial memorandum''' is a formal written document in which an [[Definition:Actuary | actuary]] records the data, methods, [[Definition:Actuarial assumptions | assumptions]], and reasoning behind a specific piece of actuarial work — such as a [[Definition:Ratemaking | rate indication]], a [[Definition:Loss reserve | reserve estimate]], or a [[Definition:Product development | product-design]] recommendation. In the insurance industry, these memoranda serve simultaneously as professional work papers, regulatory submissions, and institutional knowledge repositories, making them among the most consequential documents an [[Definition:Actuarial department | actuarial department]] produces.

📋 Regulatory bodies and [[Definition:Actuarial standard of practice (ASOP) | actuarial standards of practice]] require that the memorandum be sufficiently detailed for another qualified actuary to evaluate and, if necessary, replicate the work. When a [[Definition:Property and casualty insurance | property-casualty]] carrier files a [[Definition:Rate filing | rate filing]] with a state [[Definition:Department of insurance | department of insurance]], an actuarial memorandum accompanies the submission to justify the proposed rate changes — documenting [[Definition:Loss development | loss-development]] selections, [[Definition:Trend factor | trend factors]], [[Definition:Credibility | credibility]] adjustments, and the final indicated rate need. In the [[Definition:Life insurance | life]] sector, a memorandum supporting the [[Definition:Statement of actuarial opinion | appointed actuary's opinion]] on reserves must describe the methods used, the tests performed, and any areas of concern. During a [[Definition:Financial examination | financial examination]], regulators routinely request these memoranda to verify that an insurer's reported financial position rests on sound actuarial analysis.

🔒 Beyond regulatory compliance, a well-constructed actuarial memorandum protects both the individual actuary and the organization. If an [[Definition:Insurance claim | adverse loss event]] or a [[Definition:Litigation | litigated coverage dispute]] later calls the original analysis into question, the memorandum provides a contemporaneous record of what was known, what judgment was exercised, and why. This documentation discipline also supports continuity: when staff turnover occurs or an external [[Definition:Actuarial consultant | actuarial consultant]] hands off a project, successors can pick up the thread without restarting from scratch. For [[Definition:Insurtech | insurtechs]] and fast-growing [[Definition:Managing general agent (MGA) | MGAs]] building their actuarial functions, establishing rigorous memorandum practices early signals maturity to [[Definition:Insurance carrier | capacity providers]] and regulators alike.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Statement of actuarial opinion]]
* [[Definition:Actuarial standard of practice (ASOP)]]
* [[Definition:Rate filing]]
* [[Definition:Loss reserve]]
* [[Definition:Actuarial department]]
* [[Definition:Actuarial assumptions]]
{{Div col end}}

Definition:Actuarial memorandum - Revision history

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