Customer Acquisition Cost (CAC)
The fully loaded cost to win one new customer, including every sales and marketing dollar, not just ad spend.
Definition
CAC equals total sales and marketing costs divided by new customers acquired in the same period. The honest version includes salaries, tooling, agency fees, and overhead, not only paid media. Formula: CAC = Total Sales and Marketing Costs / New Customers Acquired. On its own it says nothing about whether growth is healthy. It only becomes meaningful next to LTV and payback period.
Why it matters
Most teams quote a CAC that ignores headcount and tooling, so the real number is often two to three times higher. AI that scales outreach on a broken funnel scales the cost, not the efficiency. A rising CAC with flat conversion is the first signal that the pipeline architecture, not the budget, is the problem.
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