SaaS & Subscription Metrics

Churn is the silent killer. At 5% monthly churn your average customer lasts 20 months; at 2% they last 50. Cutting churn compounds harder than adding acquisition.

LTV:CAC tells you if growth is profitable. Below 1x you lose money on every customer. Above 3x you can usually afford to spend more to grow faster.

CAC payback tells you if growth is affordable. Even a great LTV:CAC hurts cash if payback takes 24 months — you fund the gap yourself.