Free SaaS LTV to CAC calculator from Fynvorax. Model customer lifetime value, acquisition cost, payback months, and unit economics for subscription businesses.
SaaS businesses rely on unit economics to judge whether growth is sustainable. LTV:CAC shows how much lifetime gross profit you earn per dollar spent acquiring a customer. Ratios below 3x often indicate weak retention or expensive acquisition. CAC payback measures how quickly each customer returns its acquisition cost; payback under 12 months is commonly viewed as efficient.
An LTV:CAC ratio of 3x or higher is the classic industry benchmark for healthy, venture-backable growth. A ratio above 5x indicates exceptionally profitable unit economics, while anything below 2x requires immediate pricing optimization or retention corrections.