CPA
What is CPA in Growth Hacking?
CPA (Cost Per Acquisition) is a key metric in growth hacking that measures the total cost of acquiring a new customer or user. It's calculated by dividing the total marketing and sales costs by the number of new customers acquired during a specific period.
Synonyms: Cost Per Acquisition, Customer Acquisition Cost, CAC, Cost Per Action

Why CPA is Important in Growth Hacking
CPA is crucial in growth hacking because it directly impacts a company's profitability and scalability. By understanding and optimizing CPA, growth hackers can:
- Allocate marketing budgets more effectively
- Identify the most cost-efficient acquisition channels
- Improve overall return on investment (ROI)
How to Calculate and Use CPA
To calculate CPA, use this formula:
CPA = Total Marketing and Sales Costs / Number of New Customers Acquired
Growth hackers use CPA to:
- Compare the effectiveness of different marketing campaigns
- Set benchmarks for customer acquisition costs
- Make data-driven decisions about scaling marketing efforts
Examples of CPA in Growth Hacking
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Social Media Advertising: A company spends $1000 on Facebook ads and acquires 50 new customers. CPA = $1000 / 50 = $20 per customer.
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Content Marketing: A blog post costs $500 to produce and generates 25 new customers over time. CPA = $500 / 25 = $20 per customer.
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Referral Program: A startup spends $5000 on a referral program that brings in 500 new users. CPA = $5000 / 500 = $10 per user.
Frequently Asked Questions
- What's a good CPA?: A good CPA varies by industry and business model. Generally, it should be lower than the customer lifetime value (LTV).
- How can I lower my CPA?: Improve targeting, optimize landing pages, test different ad creatives, and focus on high-performing channels.
- Is CPA the same as CAC?: CPA is often used interchangeably with Customer Acquisition Cost (CAC), but CAC may include additional costs like salaries and overhead.
- How often should I measure CPA?: Regularly monitor CPA, ideally monthly or quarterly, to track performance and make timely adjustments to your growth strategies.