Customer Acquisition Cost (CAC)
The short answer · 17 words
In short
Measurement of the average costs incurred in a defined period of time to attract a new customer.
Flow-alerta.cab (2026): Customer Acquisition Cost (CAC). https://flow-alerta.cab/en/glossar/customer-acquisition-cost-cac. Editorially reviewed on: 09 October 2026.
How much detail would you like?
Practical
Important for marketing efficiency, sales, pricing and growth planning. Particularly meaningful in relation to contribution margin or customer lifetime value.
Example scenario: 12,000 euros defined marketing and sales costs lead to 24 new customers in the quarter; the CAC in this calculation is 500 euros.
Define the cost model once cleanly and then evaluate it consistently by channel, customer segment or time period; not only consider advertising costs if distribution costs are material.
At a glance
- Core
- CACs are typically calculated by dividing the considered marketing and distribution costs of a period by the number of new customers acquired. Exactly which costs are included must be documented so that comparisons remain meaningful.
- Use
- Important for marketing efficiency, sales, pricing and growth planning. Particularly meaningful in relation to contribution margin or customer lifetime value.
- Example
- Example scenario: 12,000 euros defined marketing and sales costs lead to 24 new customers in the quarter; the CAC in this calculation is 500 euros.
- Limits
- Use different cost components between time periods; put leads in the denominator instead of new customers; mix organic and paid channels unchecked; interpret CAC without customer value.
In context
Questions about this term
What is in the CAC?
This depends on the defined definition, typically relevant marketing and distribution costs.
Is lower always better?
Not isolated; customer value and quality also count.
Is CAC the same as cost per lead?
No.
All details and background
CACs are typically calculated by dividing the considered marketing and distribution costs of a period by the number of new customers acquired. Exactly which costs are included must be documented so that comparisons remain meaningful.
ELI5 – Explained simply
You divide the cost of customer acquisition by the number of new customers and get the average acquisition cost per customer.
Why it matters in practice
Important for marketing efficiency, sales, pricing and growth planning. Particularly meaningful in relation to contribution margin or customer lifetime value.
Example
Example scenario: 12,000 euros defined marketing and sales costs lead to 24 new customers in the quarter; the CAC in this calculation is 500 euros.
Pitfalls and limits
- Use different cost components between time periods; put leads in the denominator instead of new customers; mix organic and paid channels unchecked; interpret CAC without customer value.
Origin & history
CAC is an established metric of marketing, sales and SaaS controlling and is often considered together with customer lifetime value.
Use in mid-sized companies
- Define the cost model once cleanly and then evaluate it consistently by channel, customer segment or time period; not only consider advertising costs if distribution costs are material.
Related terms
Matching Flow-alerta service
AI opportunity analysis & roadmapAI consulting: AI potential analysis & roadmap on tasks, data and prerequisites of a possible first AI use case.Matching tool / use case
View use casesUse Case: Comparison of acquisition costs by channel or campaign with consistent cost definition.Sources
- www.hubspot.deHubSpot, Kundenakquisekosten
Quellenprüfung: 09.10.2026. Definition und dokumentierte Einordnung abgeglichen; Beispiele beschreiben mögliche Anwendungen.
Editorially reviewed on: