CAC: customer acquisition cost

CAC answers how much it costs, on average, to win a new paying customer—including marketing and the sales costs you attribute to acquisition.

Three columns—how CAC is calculated, why it pairs with LTV, and how to split costs by channel and sales-cycle lag—with arrows from budget to cost per new customer.

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What it is

Divide acquisition spend in a period by new customers in the same window. Document what counts: media, salaries, tools, agencies, events—finance and growth must match.

Why it matters for business

LTV sets the affordable CAC share; if CAC is out of range, the growth model does not close.

How to apply it

Split CAC by channel and product. Respect B2B cycle lag. Keep CRM and ads aligned with UTM hygiene. Separate promo spikes from sustainable run-rate in board-ready reports.

Table 1. Definition and business context

Criterion	In short
Definition	Divide acquisition spend in a period by new customers in the same window. Document what counts: media, salaries, tools, agencies, events—finance and growth must match.
Why businesses care	LTV sets the affordable CAC share; if CAC is out of range, the growth model does not close.
Effect when done right	Clear CAC reduces marketing–sales friction and shows where to trim spend without tanking revenue.

Table 2. Practice, ecosystem, and related terms

Area	What to consider
How to apply	Split CAC by channel and product. Respect B2B cycle lag.
Works with	Depends on the funnel, demand generation, and audience segmentation.
In the glossary	LTV: customer lifetime value, Sales funnel in digital marketing, Demand generation, Audience segmentation

Benefits and impact

Clear CAC reduces marketing–sales friction and shows where to trim spend without tanking revenue.

How it fits the stack

Depends on the funnel, demand generation, and audience segmentation.