Customer Lifetime Value (LTV)
Customer lifetime value estimates the economic value generated by an average customer over a defined relationship horizon.
What is Customer Lifetime Value?
LTV, also called CLV, looks beyond the first order. It combines repeat purchasing and value per purchase to describe a customer relationship. The crucial qualification is the value basis: some reports use revenue, while others use gross profit or contribution.
For acquisition decisions, contribution-based LTV is usually more informative than revenue alone because servicing future orders costs money. State whether acquisition cost has already been deducted. An LTV used as the numerator of an LTV:CAC ratio should normally be before that acquisition deduction.
Simple contribution LTV = Expected orders per customer × Average contribution per order
State the horizon and include the variable costs of fulfilling and servicing those orders. This simplified undiscounted model assumes a stable average contribution; it is not a forecast guarantee.
Revenue value and contribution value differ
A store expects an acquired customer to place four orders over 24 months. Each order has $70 of net revenue and $45 of variable costs, leaving $25 before acquisition. Revenue LTV is $280, while contribution LTV is $100. If CAC is $35, $65 remains after acquisition, before fixed costs and any time-value adjustment.
How to interpret it
A useful LTV estimate states how much is observed and how much is forecast. A customer cohort only three months old has not demonstrated two years of repeat behavior. Extending its early activity into the future introduces assumptions about retention and order frequency.
A fixed horizon such as 12 or 24 months often makes comparisons clearer than an undefined “lifetime.” Compare customers with equal time to mature, and identify whether the figure is an average across everyone acquired or only customers who returned. Excluding one-time buyers overstates cohort value.
The timing of value matters. Earning $100 of contribution over two years does not make $100 immediately available to pay today’s advertising bill. Discounted models can account for timing, while payback analysis addresses how long acquisition cash takes to return.
Returns, fulfillment costs and retention incentives can change value even when order frequency stays stable. A revenue-based LTV may rise while contribution LTV falls, so preserve the chosen boundary when comparing channels or customer groups.
A horizon is part of the name
An observed 12-month contribution value should be described as exactly that, even if a dashboard uses the shorter label LTV. It does not claim that the relationship ends after month twelve. It simply states the measurement boundary. A forecast lifetime estimate extends beyond observed data and should disclose that extension. Using a common horizon makes a new channel easier to compare with an established one without giving older customers an automatic advantage from having had more time to order.
Common mistakes
Treating forecast repeat purchases as earned profit
Expected future orders are uncertain. Separate actual cohort performance from projected value rather than presenting the entire estimate as realized earnings.
Using revenue LTV as an acquisition budget
The customer’s sales still have product and service costs. A revenue total cannot be spent entirely on acquisition without accounting for those costs.