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Core Study Guide

Customer Lifetime Value (LTV)

Understanding the long-term monetary value of customer relationships.

Customer Lifetime Value (LTV or CLV) is a crucial metric that defines the long-term economic value of a customer. In subscription businesses, LTV dictates how much you can afford to spend on acquiring customers (CAC) while remaining profitable.

LTV is driven by three variables: how much a customer pays, your gross margins, and how long they stay with your service. Improving customer retention is the most powerful lever to increase LTV.

Key Takeaways

  • •Retention Focus: LTV increases when customer churn (cancellation rate) decreases.
  • •The 3:1 Ratio: A healthy SaaS business requires an LTV to CAC ratio of 3x or higher.
  • •Valuation Metric: Investors use LTV to assess the long-term unit economics and viability of a business.

Core Concepts & Definitions

1The Inversion of Churn

Average customer lifespan is mathematically the inverse of your monthly churn rate.

•If monthly churn is 2%, the average customer lifespan is 1 / 0.02 = 50 months.

•Reducing monthly churn from 2% to 1% doubles the lifespan to 100 months, doubling LTV.

2LTV to CAC Ratio

Compares the lifetime value of a customer to the cost of acquiring them, indicating overall business viability.

•LTV:CAC < 1.0x means you are losing money on every customer acquired.

•LTV:CAC = 3.0x is the industry standard baseline for healthy SaaS businesses.