What is customer lifetime value?

What does customer lifetime value mean?

Businesses calculate LTV in different ways, so the label should travel with the formula. Lifetime revenue is simple but ignores the direct cost of serving the customer. For marketing and acquisition decisions, estimated gross-margin contribution is usually more informative.

A simple formula for a relatively stable recurring relationship is:

LTV = average revenue per customer per period × gross margin percentage × average customer lifetime in periods

If an average customer pays £500 per month, gross margin is 60% and the relationship lasts 30 months, estimated gross-margin LTV is:

£500 × 0.60 × 30 = £9,000

This is an estimate, not a promise. It assumes the averages describe future behaviour reasonably well.

A customer lifetime value example

A software company has two customer segments that each produce £12,000 in average lifetime revenue. Segment A has an 80% gross margin and needs little support. Segment B has a 35% gross margin and substantial onboarding requirements.

Revenue-based LTV makes them look equal. Before considering other costs, their gross-margin contributions are £9,600 and £4,200. That difference may justify different acquisition budgets and may prompt the company to examine pricing, onboarding or product fit for Segment B.

Real relationships can involve expansion, contraction, one-off work and changing service costs. Cohort analysis or a discounted cash-flow model may represent those businesses better than the simple formula.

Why does customer lifetime value matter?

LTV puts acquisition cost in context. A high customer acquisition cost can be rational when the customer produces sufficient contribution and the business can fund the payback period. A low CAC is not automatically attractive if the acquired customers buy little, require heavy support or leave quickly.

Segment-level LTV can also guide retention work. It helps teams distinguish between activity that increases revenue and activity that creates sustainable contribution.

A common customer lifetime value mistake

Do not use revenue and call it profit. State whether the measure is revenue, gross margin or a more complete contribution calculation.

Avoid relying on one company-wide average when customer groups behave differently. Large accounts, self-serve users and project clients may have different margins, lifetimes and service demands.

Do not present an LTV-to-CAC ratio as a universal rule. The acceptable relationship depends on uncertainty, cash, payback time, growth stage and the cost base omitted from the LTV formula.

Related terms and guides

• Customer acquisition cost: average sales and marketing cost per new customer.
• Gross margin: revenue remaining after direct delivery costs.
• Retention: the continuation of customer relationships over time.
• Conversion rate: the proportion completing a defined action.

Frequently asked questions

Are CLV and LTV the same?

They are commonly used interchangeably. Some organisations reserve the terms for different models, so define the formula rather than relying on the abbreviation.

Should LTV use revenue or gross profit?

Use the measure that matches the decision. Revenue can describe purchasing; gross-margin contribution is normally more useful when comparing acquisition economics.