What is CAC Payback Period?

The CAC Payback Period is the number of months it takes for a company to earn back the money it spent to acquire a customer. This metric is a crucial indicator of a SaaS company's capital efficiency and the effectiveness of its customer acquisition strategy.

For Startups: A shorter payback period is highly desirable as it means the company can reinvest its capital more quickly to fuel further growth. For startups pitching to investors, a payback period of under 12 months is often seen as a strong benchmark for a healthy B2B SaaS business.

For SaaS: This metric is closely tied to both LTV:CAC and churn. High churn will make it difficult to ever reach the payback period, while a high ARPA (Average Revenue Per Account) will shorten it.

Calculation: CAC Payback Period (in months) = Customer Acquisition Cost (CAC) / (Average MRR per Customer * Gross Margin)

Example: If CAC is ₹12,000, average MRR is ₹2,000, and gross margin is 80%, the payback period is ₹12,000 / (₹2,000 * 0.80) = 7.5 months.