The 5 SaaS Metrics You MUST Know by Heart

Why It Matters

Accurate SaaS metrics enable data‑driven decisions that boost profitability and attract investment.

Key Takeaways

• Calculate CAC by dividing monthly sales & marketing spend by new customers.
• Determine ARPA by dividing monthly revenue by total customer count.
• Measure account churn rate as percentage of customers lost each month.
• Compute customer lifespan as inverse of monthly churn rate.
• Derive LTV by multiplying ARPA with calculated customer lifespan.

Summary

The video walks viewers through the five core SaaS metrics every founder must internalize: Customer Acquisition Cost (CAC), Average Revenue Per Account (ARPA), account churn rate, customer lifespan, and Lifetime Value (LTV).

It explains how to compute each metric with simple formulas: CAC equals total sales‑and‑marketing spend divided by new customers; ARPA is monthly revenue divided by the customer base; churn rate is customers lost divided by total customers; lifespan is the reciprocal of monthly churn; and LTV multiplies ARPA by lifespan.

Concrete examples illustrate the calculations: $100,000 monthly revenue from 1,000 users yields a $100 ARPA; a 2% churn rate translates to a 50‑month lifespan; a $200 ARPA over 50 months produces a $10,000 LTV.

Understanding these numbers equips SaaS leaders to gauge unit economics, allocate growth capital efficiently, and communicate financial health to investors and board members.