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📘 '''In-force book''' refers to the aggregate portfolio of [[Definition:Insurance policy | insurance policies]] that are currently active — meaning [[Definition:Premium | premiums]] are being collected, coverage is in effect, and the [[Definition:Insurance carrier | insurer]] carries ongoing obligations to respond to valid [[Definition:Insurance claim | claims]]. In life insurance, the in-force book encompasses all policies where the [[Definition:Policyholder | policyholder]] has not lapsed, surrendered, or reached maturity. In general insurance, it includes all policies within their active coverage period. The in-force book is a fundamental measure of an insurer's scale and the foundation from which future revenue, [[Definition:Loss experience | loss experience]], and profitability are derived.

⚙️ Measuring and managing the in-force book requires robust [[Definition:Policy administration system | policy administration systems]] and actuarial analysis. Insurers track metrics such as total in-force [[Definition:Sum insured | sums insured]], policy count, average [[Definition:Premium | premium]], [[Definition:Retention rate | retention rate]], and the embedded profitability of the book. In [[Definition:Life insurance | life insurance]], the in-force book is central to [[Definition:Embedded value | embedded value]] and [[Definition:Actuarial appraisal value | actuarial appraisal]] calculations, which discount expected future profits from existing policies to arrive at a present value — a key metric for investors and acquirers. Under [[Definition:IFRS 17 | IFRS 17]], the [[Definition:Contractual service margin (CSM) | contractual service margin]] locked into the in-force book represents unearned profit to be released over the remaining coverage period. In property and casualty lines, the [[Definition:Unearned premium reserve | unearned premium reserve]] reflects the portion of in-force premiums not yet earned. Across all lines, the quality of the in-force book — its pricing adequacy, [[Definition:Loss ratio | loss ratio]] trajectory, and customer retention characteristics — directly determines whether the business generates sustainable [[Definition:Underwriting profit | underwriting profit]].

📊 When insurance businesses change hands, the in-force book is often the most scrutinized asset in the [[Definition:Due diligence | due diligence]] process. A buyer — whether a [[Definition:Strategic buyer | strategic acquirer]] or [[Definition:Financial buyer | financial buyer]] — must understand not only the current volume of in-force policies but also their expected [[Definition:Runoff | runoff]] pattern, the adequacy of associated [[Definition:Claims reserve | reserves]], and the likelihood of renewal. A shrinking in-force book with deteriorating retention signals underlying competitive or service problems, while a growing one with stable or improving profitability indicates a healthy franchise. For [[Definition:Managing general agent (MGA) | MGAs]] and [[Definition:Program administrator | program administrators]], the in-force book often resides on the carrier's balance sheet, but its size and performance directly determine the intermediary's [[Definition:Commission | commission]] income and negotiating leverage. Maintaining and growing a profitable in-force book is, in many respects, the central operational objective of any insurance enterprise.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Embedded value]]
* [[Definition:Unearned premium reserve]]
* [[Definition:Retention rate]]
* [[Definition:Runoff]]
* [[Definition:Book of business]]
* [[Definition:IFRS 17]]
{{Div col end}}

Definition:In-force book - Revision history

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