Customer Acquisition Cost (CAC)
Customer Acquisition Cost (CAC) is the total cost of acquiring a new customer, including all marketing and sales expenses. It's a critical metric for understanding the efficiency of your customer acquisition efforts and determining sustainable growth rates.
Calculate Your Customer Acquisition Cost
Use our free interactive calculator
Formula
CAC = Total Acquisition Costs ÷ Number of New CustomersWhere:
Total Acquisition Costs=All marketing and sales expenses (ad spend, salaries, tools, content creation, etc.)Number of New Customers=Total new customers acquired in the same periodExample
Scenario
Last quarter, you spent $50,000 on marketing and $30,000 on sales (including salaries) and acquired 400 new customers.
Calculation
CAC = ($50,000 + $30,000) ÷ 400 = $200Result
Your CAC is $200, meaning it costs $200 on average to acquire each new customer.
When to Use Customer Acquisition Cost
- 1Evaluating the efficiency of customer acquisition strategies
- 2Calculating LTV:CAC ratio to assess business health
- 3Setting sustainable marketing and sales budgets
- 4Comparing acquisition costs across different channels
- 5Determining pricing and unit economics
Common Mistakes
- ✗Only including ad spend and ignoring sales costs, tools, and labor
- ✗Not segmenting CAC by channel to identify the most efficient sources
- ✗Comparing CAC without considering customer quality and LTV
- ✗Using short time periods that don't capture the full acquisition cycle
CAC by Channel
Calculating CAC by channel helps identify your most efficient acquisition sources:
- Paid Search: Often higher CAC but high intent
- Paid Social: Good for awareness, varies widely
- Organic Search: Lower CAC but requires long-term investment
- Referrals: Typically lowest CAC with high LTV
CAC Payback Period
Beyond raw CAC, consider your payback period - how long it takes to recover the acquisition cost from customer revenue. A 12-month payback period is often a healthy target for subscription businesses.
Frequently Asked Questions
What is a good CAC?
A good CAC depends on your LTV. Generally, an LTV:CAC ratio of 3:1 is considered healthy - meaning your customer's lifetime value should be at least 3x your acquisition cost. Industry benchmarks vary widely.
How is CAC different from CPA?
CAC measures the full cost to acquire a paying customer, including all marketing and sales expenses. CPA (Cost Per Acquisition) typically refers to the cost of a specific conversion action, like a lead or signup, which may not yet be a customer.
Should I include salaries in CAC?
Yes, for accurate CAC you should include marketing and sales team salaries, software/tools costs, agency fees, content creation costs, and any other expenses directly related to acquisition.
How do I reduce CAC?
Focus on improving conversion rates, optimizing targeting to reach higher-quality prospects, leveraging organic channels (SEO, referrals), improving sales efficiency, and continuously testing and optimizing campaigns.
Related Terms
Learn More
Stop Calculating, Start Growing
Xplainr automatically tracks your Customer Acquisition Cost across all channels and tells you exactly what's driving changes - no spreadsheets required.