Customer Lifetime Value (LTV): Estimating the Economics of a Customer Relationship

Customer lifetime value (LTV or CLV) estimates the economic value a customer is expected to generate over the customer relationship.

There is no single universal formula. A useful version often starts with expected customer revenue, applies an appropriate gross-profit or contribution margin, and incorporates expected retention over time.

A simple example

Suppose a subscription customer pays $100 per month, produces a 70% gross margin, and is expected to remain for 30 months.

A simple undiscounted gross-profit LTV estimate would be:

$100 × 70% × 30 = $2,100

That is only a model. A more complete estimate may use cohort-specific retention curves, expansion, contraction, servicing costs, discounting, or different margin definitions.

LTV is an estimate, not a reported accounting value

Customer lifetime value is not a standardized GAAP measure and is not the balance-sheet value of a customer relationship.

The estimate depends on assumptions about customer lifetime, churn, future spending, margin, servicing costs, and sometimes a discount rate. Small changes in those assumptions can materially change the answer.

Revenue LTV versus profit-based LTV

An LTV calculated from revenue can look much larger than one calculated from gross profit or contribution profit.

That distinction matters when comparing LTV with Customer Acquisition Cost. A ratio that compares revenue-based LTV with CAC is economically different from one that compares gross-profit LTV with CAC.

Cohorts matter

Blended averages can hide changes in customer quality. Customers acquired through one channel, geography, product, or year may retain and spend differently from another cohort.

An investor should therefore ask whether the LTV estimate uses mature observed behavior or extrapolates beyond the available history. Young cohorts can make long-horizon lifetime estimates especially uncertain.

Retention is usually the key sensitivity

Higher Customer Churn Rate shortens the expected customer relationship and usually lowers lifetime value. Strong Gross Revenue Retention and Net Revenue Retention can support higher customer value, but those revenue-retention metrics still need to be reconciled with the specific LTV model.

Investor interpretation

Treat LTV as a model output. Preserve the cohort, horizon, retention assumptions, margin definition, included servicing costs, and reported-versus-estimated status before comparing companies or periods.

Sources

• Getty Images 2025 Form 10-K, customer lifetime value and acquisition-cost discussion
• CLEAR registration statement, lifetime value methodology and CAC comparison

Explore more topics in the Financial Research Encyclopedia.