Cost per acquisition (CPA)

Cost per acquisition (CPA) is a marketing metric that measures the aggregate cost to acquire one paying customer on a campaign or channel level from the first touchpoint to conversion. The conversion can be defined as a sale, a purchase, a click, a sign-up, a form submission, an app download, or something else.

Cost per acquisition is an essential metric that provides key insights into the efficiency of your marketing efforts on various channels, such as PPC, affiliate, display, social media, content marketing, SEO, email and others.

To calculate your advertising campaign’s cost per acquisition, take your total advertising spend and divide it by the number of conversions:

CPA = Ad Spend ÷ Conversions

You can reduce CPA by:

  • Optimizing landing pages.
  • Improving the checkout process.
  • Optimizing ad copy.
  • Focusing on customer retention.
  • Managing and prioritizing leads.

By understanding and effectively calculating CPA, businesses can:

  • Optimize their marketing strategies and campaigns.
  • Manage their budget more effectively.
  • Analyze and enhance their profitability.
  • Adjust their business decisions.

Businesses can also combine CPA with average order value (AOV) and customer lifetime value (CLV) to calculate what CPA will work in their marketing budget.


  • What is PII, non-PII, and personal data? [UPDATED]

    Personally identifiable information (PII) and personal data are two classifications of data that often confuse organizations that collect, store and analyze such data. Both terms cover common ground, classifying information that could reveal an individual’s identity directly or indirectly. PII is used in the US, but no specific legal document defines it. The legal system…

  • What is first-party data and how does it benefit your marketing strategy [Updated]

    First-party data is information a company collects directly from its customers through owned channels like websites, apps, transactions, and customer interactions. Unlike third-party data purchased from external sources, first-party data comes straight from your audience, making it more accurate, privacy-compliant, and valuable for personalized marketing. According to Acquia’s 2024 CX Trends Report, 93% of marketers…