Customer Lifetime Value (CLV) is the total amount of profit a company expects to earn from a customer over the entire period of their relationship. It is calculated by adding up all future profits from that customer and converting them into today’s value because money received in the future is worth less than money received now.
The traditional CLV approach uses a financial method called discounted cash flow (DCF). This means each future cash flow is adjusted back to its present value using a discount rate. The general idea is:
CLV = Current profit + future profit in year 1 (discounted) + future profit in year 2 (discounted) + … + future profit in year n (discounted)
Each future cash flow is reduced using the formula 1 ÷ (1 + r)ⁿ, where r is the discount rate and n is the number of years in the future. This ensures all future profits are measured in today’s terms. Companies often use the Weighted Average Cost of Capital (WACC) as the discount rate because it reflects the firm’s overall cost of financing.
Simplified (Modified) CLV Model
Researchers Gupta and Lehmann simplified the CLV model to make it easier to use in real business situations. They made three important assumptions:
- Customer profit margin stays the same over time
- Customer retention rate stays the same over time
- The customer relationship continues for an unlimited time
Because of these assumptions, companies do not need detailed customer-level data. Instead, they can estimate CLV using basic information.
The simplified formula becomes:
CLV = (m × r) ÷ (1 + i − r)
Where:
- m = average profit margin per customer
- r = customer retention rate
- i = discount rate
Average margin is calculated as total revenue from customers minus operating costs, divided by the number of customers.
CLV helps companies understand how valuable a customer is over the long term. It supports better decisions about marketing, customer retention, and resource allocation by focusing on long-term profit instead of short-term sales.
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