Customer acquisition cost (CAC) is the total cost required to acquire one new customer, calculated by dividing the combined sales and marketing spend over a period by the number of new customers acquired in that same period.
How to Calculate CAC
The basic formula is: CAC = Total Sales and Marketing Spend / Number of New Customers Acquired.
The "total sales and marketing spend" in the numerator should include all direct costs that contribute to acquisition: advertising spend, sales team salaries and commissions, marketing team salaries, software costs for CRM and marketing automation, event costs, and content production. Companies differ on whether to include indirect costs such as overhead and management time. Consistency matters more than the specific inclusion decisions; the number is only useful if calculated the same way across periods.
CAC should be calculated separately for different acquisition channels where possible. Paid search CAC, outbound CAC, and partner channel CAC will differ significantly, and blending them obscures which channels are actually efficient.
CAC Payback Period
CAC on its own is not actionable without the CAC payback period: how many months of gross margin it takes to recover the acquisition cost of a new customer. A company with high CAC but a short payback period may be in a healthy position. A company with low CAC but a long payback period may be at risk if customer churn is also high.
The target payback period varies by business model, but for B2B SaaS, a payback period under twelve months is generally considered healthy for sales-led growth.
Example
A SaaS company spends a total of 400,000 dollars on sales and marketing in Q1 and acquires 40 new customers. CAC for the quarter is 10,000 dollars per customer. The average annual contract value is 24,000 dollars with 70% gross margin. Monthly gross margin per customer is 1,400 dollars. CAC payback period is approximately 7 months.
How Abmatic Does This
Abmatic improves CAC efficiency by helping teams concentrate spend on in-market accounts, reducing the cost of acquiring customers who were already signaling readiness compared to working cold lists sequentially.
Related: Pipeline velocity definition | Ideal customer profile definition
