Masoud Azizi
Co-Founder & CMO, Indigo Mars
Customer lifetime value — the total revenue a business can expect from one customer across the entire relationship, not just their first purchase — is calculated as average purchase value multiplied by purchase frequency multiplied by customer lifespan. A clothing store with a $50 average purchase, three purchases a year, and a two-year average customer relationship has a CLV of $300. That single number changes how a business should think about acquisition spend entirely: a $300 customer easily justifies a higher acquisition cost than a $50 one, even though both might convert from the exact same ad.
The Simple Formula
Customer value equals average purchase value multiplied by purchase frequency. Multiply that by average customer lifespan, and you have customer lifetime value. This version is straightforward enough to calculate from data most businesses already have — average transaction size, how often a typical customer buys, and roughly how long customers tend to stick around.
The Version That Actually Matters: Margin-Adjusted CLV
Revenue isn't profit, and a business making acquisition decisions off raw revenue CLV is working from an inflated number. Multiplying the standard CLV formula by gross margin percentage produces a far more honest figure — the number that should actually govern how much a business is willing to spend to acquire a customer. A business with 45% gross margins and a $500 revenue CLV is really working with $225 in actual profit per customer, a meaningfully different number to budget against.
The 3:1 Benchmark
A healthy relationship between customer lifetime value and customer acquisition cost is generally considered to be at least 3 to 1 — a customer should be worth roughly three times what it costs to acquire them. Below that ratio, a business is spending too aggressively relative to what customers are actually worth; comfortably above it, there's often room to invest more in acquisition and still come out ahead. This ratio is a far more useful decision tool than either number alone, since acquisition cost or CLV in isolation doesn't tell you whether the relationship between them is actually healthy.
Why a Small Number of Customers Usually Drive Most of Your Value
A consistent pattern across most businesses: roughly 80% of total customer lifetime value comes from around 20% of customers. This has a real practical implication — identifying what makes that top 20% different, and investing retention effort specifically toward keeping and expanding those relationships, tends to produce more return than spreading equal attention across every customer regardless of value.
Where to Go From Here
Once you know what a customer is actually worth, it directly informs a realistic acquisition budget — see How Much Should a Los Angeles Business Actually Spend on Marketing?
Not sure what your own customer lifetime value actually is? Get in touch — we'll help you work through the real numbers.
