Customer metric

CAC

Customer acquisition cost.

Updated 9 October 2026Open in Marginful

On this page

Customer acquisition cost.

CAC = (Ad spend + other marketing costs) ÷ New customers

Example

Ad spend $2,000 + agency fee $400 ÷ 60 new customers = CAC $40.00.

How it is calculated

  • Empty (—) when there are no new customers.

Reading it

  • Format: Amount in your reporting currency.
  • Lower is better (an increase is shown in red).

Where it appears

  • Overview and Dashboards — add it from the metric picker (Customers group).
  • Settings → Targets — set a target and get an alert when you miss it. See targets.

Was this page helpful?

Need help?
CAC · Marginful Docs