CAC Payback Period Calculator
Calculate exactly how many months it takes for a newly acquired customer to generate enough profit to pay back your marketing spend.
CAC Payback Time Required:
Cash Flow Reality: Managing Your Runway
The number one reason heavily-funded startups go bankrupt is Cash Flow Depletion. They spend thousands of dollars upfront to acquire customers, but they collect revenue from those customers in tiny $50 monthly slices. The CAC Payback Period is the most critical metric for survival.
What is the "Payback Period"?
The Payback Period isolates exactly how many months a customer must remain subscribed before the Gross Profit generated from their subscription covers the cost it took to acquire them (CAC). Until a customer hits this month, they are technically a financial negative to your business. Every month after this period is pure, compounding profit.
Why Software and Services Differ
Software (SaaS) relies entirely on 12 to 18-month payback cycles. They spend $1,000 to get a $100/mo corporate client, and wait a year to turn a profit on them. They can survive this curve only because Software has a massive 90% Gross margin (servers cost almost nothing). Conversely, Physical E-commerce stores must see a Payback Period of exactly Day 1, because shipping inventory physically drains cash reserves immediately.