Customer lifetime value

Customer lifetime value (CLV) treats a customer relationship as a stream of future contribution rather than a one-off sale. Retention therefore depends on continuing care and normally costs less than repeated acquisition. Acquisition cost must include the relevant marketing and selling expense, not only a salesperson’s time; its scale differs dramatically between Boeing or Airbus and a high-street bakery. CLV is most useful where purchases continue for years. A housebuilder may sell two or three homes to one person but normally needs one transaction to cover acquisition, although a satisfied buyer can create referral value through Net Promoter Score®. In a continuing relationship, trial purchases may grow, plateau and decline; early contribution can be negative before acquisition cost is recovered.

When to use it

• Use it to estimate the economic contribution of a customer over the relationship.
• Apply it to acquisition, retention, segmentation, cross-selling and experience investment.

Origins

Customer lifetime value grew from the convergence of direct marketing, relationship marketing and discounted-cash-flow analysis. R. Shaw and M. Stone discussed CLV in their 1988 book Database Marketing, as better customer records made it increasingly practical to connect acquisition, retention, purchasing and service costs over time. Academic researchers and consultancies subsequently formalised alternative models for contractual and non-contractual settings. Retailers and subscription businesses adopted the logic rapidly, while many business-to-business markets have used it less consistently because relationships are fewer, longer and harder to model from standard transaction data.

What it is

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A simplified customer lifetime value formula is:

Annual profit per customer × years retained – acquisition cost = customer lifetime value

Because money received later is worth less than money held today, a complete model discounts future cash flows. Before that refinement, the simple calculation uses three inputs:

1. Customer-acquisition cost.

1. Annual profit per customer.

1. Average retention or expected lifetime.

Estimate retention from the share of customers lost. If annual churn is 20 per cent and retention is 80 per cent, the implied average lifetime is five years. The illustration applies that logic to made-up values.

Refine the model by discounting forecast cash flows and subtracting support and service costs throughout the relationship. CLV can then guide strategy:

• Segment customers by lifetime contribution and use profitable profiles to focus future acquisition.

• Combine CLV with share of wallet to find high-value customers whose low current share indicates expansion potential.

• Compare acquisition channels by the lifetime value they produce, not only initial conversion.

• Identify long-standing valuable customers for an economically justified loyalty programme.

• Spend more up front where credible future contribution exceeds the additional acquisition cost.

• Test whether relationship-management communication increases both customer experience and lifetime sales.

The difficult input is realistic future profit. Assumptions must cover purchase volume, channel migration, price, service cost and retention rather than simply extending the past.

Developments of the model

The basic model remains common but needs NPV discounting and a dynamic view of behaviour. A bakery customer who initially buys bread once a week might later visit three or four times for confectionery. That growth may take weeks or months, so cohort or state-transition models can represent changing spend and retention more accurately.

How to use it

Use CLV where relationships and churn materially affect economics, including gyms, telecommunications, airlines, banking, insurance and many B2B services. A gym member paying $20 per month for three years generates $720 of revenue. That forecast may justify spending $200 to acquire a member through introductory offers. If a buffet bar is installed after 18 months, add the expected snack and drink contribution rather than leaving the original model unchanged.

Refresh the model whenever the offer, cost structure or customer behaviour changes.

Some things to think about

Calculate three core metrics:

• Profit per customer: average revenue less the full relevant customer cost.

• Average lifetime: expected active duration, based on cohorts or retention.

• Acquisition cost: relevant annual marketing and sales cost divided by new customers acquired.

Calculate:

Customer lifetime value = (Profit per customer × Average customer lifetime) – Acquisition cost per customer

Then model which controllable change to profit, lifetime or acquisition cost produces incremental value.

Top practical tip

Use contribution after all customer-specific acquisition, service and retention costs—not revenue—as the economic input.

Top pitfall

Do not value future cash as if it arrived today. Discount it to net present value and expose the retention and spend assumptions driving the result.

Further reading

• Berger, P.D. and Nasr, N.I. (nineteen ninety-eight). “Customer Lifetime Value: Marketing Models and Applications.” Journal of Interactive Marketing.
• Gupta, S. et al. (two thousand and six). “Modeling Customer Lifetime Value.” Journal of Service Research.