Is SaaS Math Broken? Adapting Unit Economics to New Churn Realities

The article argues that traditional SaaS unit economics are breaking due to rising customer churn and slower growth, making historically acceptable CAC payback periods unsustainable unless companies dramatically improve S&M efficiency. Strong customer retention has been the critical assumption enabling SaaS profitability, but as churn increases (driven by AI commoditization and lower switching costs), companies must shorten CAC payback periods and prioritize profitability over growth to maintain viable unit economics. The path forward requires efficiency gains to offset declining customer lifetimes rather than relying on legacy benchmarks that assume higher retention rates.