What is CAC?

Customer Acquisition Cost (CAC) is a fundamental metric that measures the total cost a business incurs to acquire a single new customer. This includes all expenses related to sales and marketing efforts—such as digital advertising spend, salaries of the sales and marketing teams, creative production costs, software subscriptions for CRM or marketing automation, and general overhead—divided by the number of new customers acquired during a specific period. For instance, if a SaaS startup spends ₹10 Lakhs on marketing in a quarter and acquires 1,000 new customers, its CAC is ₹1,000 per customer. Understanding CAC is vital because it must be analyzed in direct relation to Customer Lifetime Value (LTV). A business model is generally considered viable and scalable if the LTV is significantly higher than the CAC, with a common benchmark being a 3:1 ratio. If your CAC is higher than the lifetime profit a customer generates, your growth is essentially destroying value rather than creating it. By tracking CAC across different acquisition channels (e.g., SEO, Google Ads, LinkedIn, or Direct Sales), founders can identify the most efficient ways to grow and optimize their marketing budget to drive the highest possible ROI. It is also important to track "CAC Payback Period"—the number of months it takes to earn back the CAC from a customer.