---
title: "CAC (Customer Acquisition Cost) — AP Business Definition"
description: "CAC is the cost of winning one new customer. Learn how customer acquisition cost works in AP Business Unit 2 and why strong relationships drive it down."
canonical: "https://fiveable.me/ap-business/key-terms/cac"
type: "key-term"
subject: "AP Business with Personal Finance"
unit: "Unit 2"
---

# CAC (Customer Acquisition Cost) — AP Business Definition

## Definition

In AP Business, CAC (customer acquisition cost) is the total marketing, advertising, and sales spending used to win new customers, divided by the number of new customers gained. Lower CAC generally means higher profit.

## What It Is

CAC stands for **[customer acquisition cost](/ap-business/key-terms/customer-acquisition-cost "fv-autolink")**, and it answers a simple question: how much did it [cost](/ap-business/unit-1/how-do-business-ideas-originate/study-guide/EdqjpZ5bjkqJpiGXxy8n "fv-autolink") the business to land one new customer? You calculate it by adding up all the marketing, advertising, and sales costs tied to acquiring customers, then dividing by the number of new customers those efforts brought in.

Think of it as the [price](/ap-business/unit-2/price/study-guide/RjERyO6ETg1j4c5i5lQQ "fv-autolink") tag on a new buyer. If a company spends $10,000 on ads and sales and gains 500 new customers, its CAC is $20 per customer. That number tells you whether the business is spending its marketing dollars efficiently. A high CAC eats into profit; a low CAC means each new customer was cheap to win, leaving more room for profit on every sale.

## Why It Matters

CAC lives in **[Unit 2](/ap-business/unit-2 "fv-autolink"): Marketing**, specifically topic **2.1 Marketing to Customers**, and it ties directly to learning objective **[AP Business](/ap-business "fv-autolink") 2.1.C** (the purpose of building customer relationships). EK 2.1.C.2 makes the connection explicit: strong customer relationships can *reduce* customer acquisition cost and increase profit, because satisfied customers refer new ones. That referral effect is basically free marketing, so the cost of acquiring each new customer drops. CAC is where marketing strategy meets the bottom line, which is why it shows up when the exam asks you to justify relationship-building tactics with a financial reason, not just a feel-good one.

## Connections

### Customer relationship tactics (Unit 2)

[Rewards programs](/ap-business/unit-2/marketing-to-customers/study-guide/CxCvJASGG5lxPB0QtRTF "fv-autolink"), personalized service, and satisfaction surveys (EK 2.1.C.1) aren't just nice touches. Happy customers refer friends, which lowers CAC because you didn't pay to find those new buyers.

### CLV / Customer Lifetime Value (Unit 2)

CAC is what you pay to get a [customer](/ap-business/key-terms/customer "fv-autolink"); CLV is what that customer is worth over time. The whole game is keeping CLV well above CAC, so a customer earns back far more than they cost to acquire.

### Marketing campaign and channels (Unit 2)

Every campaign and [channel](/ap-business/key-terms/channel "fv-autolink") has its own price per customer. Comparing CAC across channels helps a business decide where to spend, like shifting budget from pricey ads to cheaper word-of-mouth referrals.

### Customer data collection (Unit 2)

Better customer data (LO AP Business 2.1.A) means sharper targeting, so marketing dollars hit the right people. Wasting less spend on the wrong audience is one of the most direct ways to push CAC down.

## On the AP Exam

Expect CAC to appear as a calculation or as part of a marketing-strategy justification. On multiple choice, you might be given total marketing and sales costs plus a number of new customers and asked to compute CAC, or to identify what would lower it. On free response, CAC is the financial payoff you point to when explaining *why* a business should build customer relationships: tactics like loyalty programs and great service reduce CAC by generating referrals. When you use it, do the math cleanly (total acquisition costs divided by new customers) and connect the number back to profit.

## CAC vs CLV (customer lifetime value)

CAC is the cost to GET a customer; CLV is the total value a customer brings over the WHOLE relationship. CAC is a one-time entry cost, CLV is the ongoing payoff. A healthy business keeps CLV much larger than CAC.

## Key Takeaways

- CAC means customer acquisition cost: total marketing, advertising, and sales costs divided by the number of new customers gained.
- A lower CAC generally means higher profit because each new customer cost less to win.
- Strong customer relationships reduce CAC, since satisfied customers refer new buyers for free (EK 2.1.C.2).
- CAC and CLV are a pair: CAC is what a customer costs to acquire, CLV is what they're worth over time, and CLV should exceed CAC.
- On the exam, use CAC as the financial reason that relationship-building tactics like rewards programs and good service actually pay off.

## FAQs

### What is CAC in AP Business?

CAC is customer acquisition cost, the total marketing, advertising, and sales spending used to win new customers divided by the number of new customers gained. It tells you how much it costs to land one new buyer.

### How do you calculate CAC?

Add up all marketing, advertising, and sales costs tied to acquiring customers, then divide by the number of new customers those efforts brought in. For example, $10,000 in costs and 500 new customers gives a CAC of $20 per customer.

### Does building customer relationships actually lower CAC?

Yes. EK 2.1.C.2 says strong relationships can reduce CAC because satisfied customers refer new customers, meaning the business doesn't have to pay to find those buyers, which can increase profit.

### How is CAC different from CLV?

CAC is the cost to acquire a customer (a one-time entry cost), while CLV is the customer's total value over the entire relationship. A profitable business keeps CLV well above CAC.

### Is CAC something I need to calculate on the AP Business exam?

It can be. You may be given total acquisition costs and a number of new customers and asked to compute CAC, or asked to explain why a tactic like a loyalty program would lower it and boost profit.

## Related Study Guides

- [2.1 Marketing to Customers](/ap-business/unit-2/marketing-to-customers/study-guide/CxCvJASGG5lxPB0QtRTF)

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