[GTM glossary](/glossary.md) Book of business

Market & Targeting

# Book of business

In short

A book of business is the collection of accounts assigned to a seller or team. It typically includes current customers, open opportunities, and target prospects the owner is accountable for.

The term is common in account management, insurance, and enterprise sales. It defines who works which accounts and is the basis for quotas, compensation, and territory design.

## What a book of business contains

* **Existing customers:** Accounts to retain and expand.
* **Open opportunities:** Deals currently in the pipeline.
* **Target prospects:** Assigned accounts the owner should open.
* **History:** Past contacts, deals, and notes that move with the account.

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## How to build and balance books

### 1. Count and size the accounts

List every account with size, current revenue, and potential. Without potential, books look equal when they are not.

### 2. Divide by a clear rule

Common rules are geography, industry, company size, or named accounts. Pick one primary rule and make exceptions rare.

### 3. Balance potential, not just count

Say two reps each hold 50 accounts, but one book has far more large, high-fit companies. They are not equal. Balance by expected opportunity and workload.

### 4. Review on a schedule

Reassign accounts when reps leave, quotas change, or accounts sit untouched for too long.

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## Book of business vs. territory

A territory is a defined slice of the market, such as a region or segment. A book of business is the actual list of accounts a person holds, which may follow a territory or be a named set.

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## Common mistakes

* **Hoarding:** Reps keep accounts they do not work. Use activity rules to reclaim them.
* **Unbalanced books:** Equal account counts with unequal potential create unfair quotas.
* **Messy ownership data:** Duplicate or unowned accounts cause conflicts and missed outreach.

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## Book of business FAQs

**What does book of business mean in sales?**

It is the group of accounts a salesperson or account manager owns, covering current customers, open deals, and assigned prospects. It defines who is responsible for each account and often sets quota and compensation.

**How do you build a book of business?**

Assign accounts using a clear rule such as territory, industry, or size, balance books by potential revenue as well as account count, and document ownership in your CRM. Then review and rebalance on a regular schedule.

**What is the difference between a book of business and a territory?**

A territory is a defined portion of the market, such as a region or segment. A book of business is the specific list of accounts a person owns, which may be drawn from a territory or assigned by name.

**What happens to a book of business when a rep leaves?**

The accounts are usually reassigned to other reps or an interim owner so customers stay covered. Good practice is to keep notes and history in the CRM so the new owner can pick up without losing context.

Share term

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## More related phrases

* [Key accounts](/glossary/key-accounts.md)
* [Named accounts](/glossary/named-accounts.md)
* [Coverage model](/glossary/coverage-model.md)

## Similar phrases

* [Sales territory](/glossary/sales-territory.md)  
A sales territory is a defined set of accounts, usually grouped by geography, industry, or size, assigned to a rep or team so coverage is clear and effort is balanced.
* [Territory planning](/glossary/territory-planning.md)  
Territory planning is the up-front process of sizing a market, choosing a coverage model, and designing sales territories and targets so the team can capture the available opportunity.
* [Whitespace analysis](/glossary/whitespace-analysis.md)  
Whitespace analysis identifies accounts, segments, products, or regions where you have little or no presence yet, but where fit and demand suggest revenue potential your team is not capturing.
* [Account tiering](/glossary/account-tiering.md)  
Account tiering groups target accounts into tiers by fit and potential value, so the highest-value accounts get the most personalized effort.
* [Target account list](/glossary/target-account-list.md)  
A target account list is a defined set of companies that a sales and marketing team has chosen to pursue because they match the ideal customer profile and show strong potential.