CLV (Customer Lifetime Value), also written as LTV or CLTV, is a forward-looking estimate of how much revenue or profit a single customer will generate from their first purchase to the point they stop buying.
Formula (simple):
CLV = Average Order Value × Purchase Frequency per Year × Customer Lifespan (years)
Formula (profit-based):
CLV = (Average Order Value × Gross Margin %) × Purchase Frequency × Lifespan
Example: A customer orders 4 times per year, spends $80 per order, has a 3-year lifespan, and you make 35% gross margin.
CLV = $80 × 35% × 4 × 3 = $336
Why CLV Is the Most Important Ecommerce Metric
CLV defines how much you can afford to spend acquiring a customer. If CLV is $336, spending $80 on CAC (a 1:4.2 ratio) is profitable. Without knowing CLV, CAC targets are guesswork.
CLV also determines which customer segments are worth retaining versus churning, which products to prioritize (do they lead to repeat purchase?), and the long-term value of a subscription vs. one-time model.
CLV vs. LTV
The terms are interchangeable. Some teams distinguish:
- LTV = gross revenue from the customer
- CLV = net profit after COGS and operating costs
The profit-based definition is more actionable for business decisions.
Increasing CLV
| Lever | How It Raises CLV |
|---|---|
| Subscription model | Extends lifespan and purchase frequency |
| Cross-sell / upsell | Raises average order value |
| Loyalty program | Improves retention and purchase frequency |
| Customer service quality | Reduces churn (longer lifespan) |
| Email / SMS retention | Re-activates lapsed customers |
| Product expansion | More SKUs = more purchase occasions |
CLV by Acquisition Channel
Not all customers have the same CLV. Customers acquired through referral or organic search tend to have 20–40% higher CLV than customers acquired through paid social, because intent and brand affinity are higher at acquisition.