Lifetime Value (LTV)

What is Lifetime Value (LTV)?

Lifetime value, also called customer lifetime value or CLV, estimates the economic value attributed to a customer relationship. It is not one universally standardized measure. Some teams report future revenue, while others apply gross margin or contribution assumptions to estimate the value remaining after selected delivery costs.

The calculation should identify the customer population and time basis. Cohort-based methods follow groups acquired in comparable periods. Aggregate methods use averages across a broader customer base. Contractual businesses may use expected renewal or term behavior, while transaction businesses can require a different repeat-purchase model.

Simple churn-based formulas assume that churn and customer economics are reasonably stable and that the chosen churn measure matches the revenue measure. Those assumptions often weaken when cohorts are young, segments differ, expansion is material, or churn changes over time.

Revenue LTV versus gross-profit LTV

Revenue LTV estimates customer revenue over the modeled relationship. Gross-profit LTV applies a gross-margin or contribution convention to that revenue. The second can be more relevant to acquisition economics because it recognizes selected delivery costs, but the cost policy must be stated. Neither label should be assumed from the number alone.

What assumptions affect LTV?

• Retention or churn

  The observed cohort pattern or churn assumption used to estimate lifetime.

• Revenue definition

  ARPA, recurring revenue, expansion, contraction, and non-recurring items included by policy.

• Margin convention

  The direct or contribution costs applied when the result is not revenue LTV.

• Horizon and discounting

  Any cap, terminal assumption, or present-value treatment used in the model.

LTV versus realized customer value

Realized customer value can be measured from completed historical activity. LTV extends beyond the observed period using a model. Keep the observed history, assumptions, and modeled remainder visible so an estimate is not presented as cash already received.

Why it matters

LTV can help a company compare customer segments, acquisition choices, retention work, pricing, and service economics. It becomes more useful when the same policy is applied consistently and the inputs can be reconciled to cohort evidence.

A large LTV estimate is not automatically good. It can be inflated by low assumed churn, optimistic expansion, an unlimited horizon, or a revenue-only convention that ignores delivery cost and cash timing.

Simplified churn-based approximations

• A clearly defined customer cohort or population
• Average revenue per account or another compatible revenue measure
• Customer churn or retention measured on the same time basis
• Gross-margin or contribution policy when costs are included
• Any horizon cap, expansion, contraction, and discounting assumptions

Simplified churn-based approximations

Revenue LTV ≈ ARPA ÷ customer churn rate
Gross-profit LTV ≈ ARPA × gross margin % ÷ customer churn rate

Illustrative simplified estimate

How RunwayCal helps

Common mistakes

• 1Calling LTV the total revenue a customer will certainly produce.
• 2Comparing revenue LTV with gross-profit LTV without naming the convention.
• 3Using a simple churn formula when churn or economics are unstable.
• 4Mixing customer cohorts, segments, or time bases in the same calculation.
• 5Treating expected lifetime value as cash already collected.