Customer Acquisition Cost (CAC)
The fully loaded total sales and marketing cost required to acquire a single new customer.
FORMULA
CAC = (Total Sales & Marketing Expense in Period) / (New Customers Acquired in Period)Why it matters
Customer Acquisition Cost measures the efficiency of a company's go-to-market engine. It dictates how much capital is required to scale. A lower CAC means the business can grow faster on less funding. Calculating CAC accurately requires a fully loaded approach: it must include marketing spend, sales commissions, software tools, and the salaries of all sales and marketing personnel. Evaluating CAC in isolation is dangerous; it must always be compared to the Lifetime Value (LTV) of the customer and the Gross Margin to determine if the acquisition engine is actually generating enterprise value.
2025 BENCHMARK
Bessemer's 2025 metrics indicate a median CAC of $12,000 for mid-market B2B SaaS, with enterprise CAC frequently exceeding $50,000.
COMMON MISTAKES
- Excluding the salaries and overhead of the sales and marketing teams.
- Failing to apply a time lag (sales cycle) between marketing spend and customer acquisition.
- Averaging CAC across fundamentally different go-to-market channels.