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	<title>Definition:Book of business - Revision history</title>
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	<updated>2026-06-13T19:57:10Z</updated>
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		<updated>2026-03-11T06:56:34Z</updated>

		<summary type="html">&lt;p&gt;Bot: Updating existing article from JSON&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 14:56, 11 March 2026&lt;/td&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;📚&lt;/del&gt; &#039;&#039;&#039;Book of business&#039;&#039;&#039; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;is&lt;/del&gt; the &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;collective&lt;/del&gt; portfolio of [[Definition:&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Insurance policy&lt;/del&gt; | policies]], accounts, or [[Definition:&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Insurance coverage&lt;/del&gt; | &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;coverages&lt;/del&gt;]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;managed&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;by&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;an&lt;/del&gt; [[Definition:Insurance carrier | &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;insurer&lt;/del&gt;]], [[Definition:Managing general agent (MGA) | MGA]],&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; or&lt;/del&gt; [[Definition:Insurance broker | broker]]. It &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;represents,&lt;/del&gt; in &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;aggregate,&lt;/del&gt; the &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;risks&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;an&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;organization&lt;/del&gt; has &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;agreed&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;to&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;cover&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;(or&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;place)&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;and&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;the&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Definition:Premium&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|&lt;/del&gt; premium&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;revenue&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;associated&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;with&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;them&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;—&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;essentially&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;the&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;living&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;inventory&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;of&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;an&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;insurance&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;operation&#039;s&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;commitments&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;
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  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;📋&lt;/ins&gt; &#039;&#039;&#039;Book of business&#039;&#039;&#039; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;describes&lt;/ins&gt; the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;aggregate&lt;/ins&gt; portfolio of [[Definition:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Policy&lt;/ins&gt; |&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; insurance&lt;/ins&gt; policies]], accounts, or [[Definition:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Premium&lt;/ins&gt; | &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;premium&lt;/ins&gt;]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;volume&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;that&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;a&lt;/ins&gt; [[Definition:Insurance carrier | &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;carrier&lt;/ins&gt;]], [[Definition:Managing general agent (MGA) | MGA]], [[Definition:Insurance broker | broker]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, or individual [[Definition:Underwriter | underwriter]] controls&lt;/ins&gt;. It &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;is one of the most frequently referenced concepts&lt;/ins&gt; in &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;insurance because it encapsulates&lt;/ins&gt; the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;revenue&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;base,&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;risk profile, and client relationships that define a market participant&#039;s commercial value. When industry professionals say a company&lt;/ins&gt; has &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;a&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&quot;strong&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;book,&quot;&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;they&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mean&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;it&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;generates&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;consistent,&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;profitable&lt;/ins&gt; premium &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;with&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;high&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Definition:Retention&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rate&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;retention&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rates]]&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;and&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;manageable&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Definition:Loss&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ratio&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;(L/R)&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;loss ratios]]&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;📂 A book of business is typically analyzed along several dimensions: line of business (e.g., [[Definition:Commercial property insurance | commercial property]], [[Definition:Professional liability insurance | professional liability]], [[Definition:Personal auto insurance | personal auto]]), geographic spread, average policy size, and historical [[Definition:Claims | claims]] performance. During [[Definition:Mergers and acquisitions (M&amp;amp;A) | M&amp;amp;A]] transactions, the quality of the book is a primary valuation driver — buyers scrutinize [[Definition:Loss development | loss-development]] patterns, client concentration risk, and the degree to which policies will renew under new ownership. [[Definition:Binding authority agreement | Binding authority agreements]] and [[Definition:Renewal rights | renewal rights]] determine whether the book can legally follow the entity being sold or whether [[Definition:Policyholder | policyholders]] may be solicited by competitors. In brokerage deals, the book&#039;s portability often depends on employment contracts and non-compete clauses governing individual producers.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;📈 Professionals evaluate a book of business by examining metrics such as total [[Definition:Gross written premium (GWP) | written premium]], [[Definition:Loss ratio (L/R) | loss ratio]], policy count, average [[Definition:Policy limit | limit]], retention rate, and geographic or class-of-business concentration. A well-diversified book spreads [[Definition:Exposure | exposure]] across industries, perils, and regions so that a single [[Definition:Catastrophe | catastrophic event]] does not disproportionately erode profitability. [[Definition:Underwriting | Underwriters]] and [[Definition:Actuary | actuaries]] continuously monitor the composition of the book, adjusting [[Definition:Rate | rates]], tightening [[Definition:Underwriting guidelines | guidelines]], or non-renewing unprofitable segments to keep overall performance on target.&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br /&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-empty diff-side-deleted&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;🏦 Ownership and control of a book of business confer significant strategic leverage. A carrier that acquires a well-diversified book instantly gains [[Definition:Premium | premium]] scale and underwriting data that can refine its [[Definition:Pricing | pricing models]]. For an MGA, the book represents the tangible proof of its [[Definition:Underwriting | underwriting]] track record when seeking additional [[Definition:Capacity | capacity]] from insurers. Conversely, the loss of a key book — whether through a departing producer, a terminated [[Definition:Delegated underwriting authority (DUA) | delegated authority]], or competitive displacement — can threaten an organization&#039;s financial stability. This is why [[Definition:Due diligence (insurance) | due diligence]] processes devote substantial attention to the durability, composition, and profitability of the book at the center of any transaction.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;💰 Beyond its operational importance, a book of business is a tangible asset with real market value. When an [[Definition:Insurance agency | agency]] is acquired or an MGA changes carrier partners, the book — along with the client relationships it embodies — is often the primary driver of the transaction price. For [[Definition:Insurtech | insurtechs]] building from scratch, assembling a profitable book quickly is the central challenge; it requires not just effective distribution but disciplined [[Definition:Risk selection | risk selection]] that proves itself over multiple [[Definition:Underwriting cycle | underwriting cycles]].&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Related concepts&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;:&lt;/ins&gt;&#039;&#039;&#039;&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Div col|colwidth=20em}}&lt;/div&gt;&lt;/td&gt;
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&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Definition:&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Gross&lt;/del&gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;written premium (GWP)&lt;/del&gt;]]&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Definition:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Renewal&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rights&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;a class=&quot;mw-diff-movedpara-right&quot; title=&quot;Paragraph was moved. Click to jump to old location.&quot; href=&quot;#movedpara_16_0_lhs&quot;&gt;&amp;#x26AB;&lt;/a&gt;&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;a name=&quot;movedpara_11_0_rhs&quot;&gt;&lt;/a&gt;* [[Definition:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Premium&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Definition:Loss ratio (L/R)]]&lt;/div&gt;&lt;/td&gt;
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  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Definition:Loss ratio (L/R)]]&lt;/div&gt;&lt;/td&gt;
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  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;a name=&quot;movedpara_13_0_rhs&quot;&gt;&lt;/a&gt;* [[Definition:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Retention&lt;/ins&gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rate&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;
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  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Definition:Underwriting]]&lt;/div&gt;&lt;/td&gt;
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&lt;/table&gt;</summary>
		<author><name>PlumBot</name></author>
	</entry>
	<entry>
		<id>https://www.insurerbrain.com/w/index.php?title=Definition:Book_of_business&amp;diff=6570&amp;oldid=prev</id>
		<title>PlumBot: Bot: Creating new article from JSON</title>
		<link rel="alternate" type="text/html" href="https://www.insurerbrain.com/w/index.php?title=Definition:Book_of_business&amp;diff=6570&amp;oldid=prev"/>
		<updated>2026-03-09T16:20:48Z</updated>

		<summary type="html">&lt;p&gt;Bot: Creating new article from JSON&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;📚 &amp;#039;&amp;#039;&amp;#039;Book of business&amp;#039;&amp;#039;&amp;#039; is the collective portfolio of [[Definition:Insurance policy | policies]], accounts, or [[Definition:Insurance coverage | coverages]] managed by an [[Definition:Insurance carrier | insurer]], [[Definition:Managing general agent (MGA) | MGA]], or [[Definition:Insurance broker | broker]]. It represents, in aggregate, the risks an organization has agreed to cover (or place) and the [[Definition:Premium | premium]] revenue associated with them — essentially the living inventory of an insurance operation&amp;#039;s commitments.&lt;br /&gt;
&lt;br /&gt;
📈 Professionals evaluate a book of business by examining metrics such as total [[Definition:Gross written premium (GWP) | written premium]], [[Definition:Loss ratio (L/R) | loss ratio]], policy count, average [[Definition:Policy limit | limit]], retention rate, and geographic or class-of-business concentration. A well-diversified book spreads [[Definition:Exposure | exposure]] across industries, perils, and regions so that a single [[Definition:Catastrophe | catastrophic event]] does not disproportionately erode profitability. [[Definition:Underwriting | Underwriters]] and [[Definition:Actuary | actuaries]] continuously monitor the composition of the book, adjusting [[Definition:Rate | rates]], tightening [[Definition:Underwriting guidelines | guidelines]], or non-renewing unprofitable segments to keep overall performance on target.&lt;br /&gt;
&lt;br /&gt;
💰 Beyond its operational importance, a book of business is a tangible asset with real market value. When an [[Definition:Insurance agency | agency]] is acquired or an MGA changes carrier partners, the book — along with the client relationships it embodies — is often the primary driver of the transaction price. For [[Definition:Insurtech | insurtechs]] building from scratch, assembling a profitable book quickly is the central challenge; it requires not just effective distribution but disciplined [[Definition:Risk selection | risk selection]] that proves itself over multiple [[Definition:Underwriting cycle | underwriting cycles]].&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Related concepts&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
{{Div col|colwidth=20em}}&lt;br /&gt;
* [[Definition:Gross written premium (GWP)]]&lt;br /&gt;
* [[Definition:Loss ratio (L/R)]]&lt;br /&gt;
* [[Definition:Underwriting]]&lt;br /&gt;
* [[Definition:Risk selection]]&lt;br /&gt;
* [[Definition:Renewal rate]]&lt;br /&gt;
* [[Definition:Portfolio management]]&lt;br /&gt;
{{Div col end}}&lt;/div&gt;</summary>
		<author><name>PlumBot</name></author>
	</entry>
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