What is customer lifetime value (CLV)?
CLV reframes a customer from a single sale into a long-term relationship worth a total amount. Knowing it tells you how much you can afford to spend winning and keeping customers.
Skip the math — the free customer lifetime value calculator runs this from your own figures.
Open the free calculator →The core idea
Customer lifetime value (CLV, sometimes LTV) is the total profit a customer generates over the entire time they buy from you — not just their first order. A customer who spends a little but stays for years can be worth more than one big one-off purchase.
Thinking in lifetime value, rather than per-transaction, changes decisions: it justifies investing in retention, onboarding, and service, because those protect a stream of future value, not just one sale.
The formula
A common, practical formula is: CLV = average order value × purchase frequency per year × customer lifespan in years × gross margin.
Example: an average order of $80, bought 4 times a year, for 3 years, at a 60% margin gives 80 × 4 × 3 × 0.6 = $576 of lifetime gross-margin value per customer.
Why measure it on margin, not revenue
It's tempting to use revenue, but revenue overstates what a customer is really worth because it ignores the cost of serving them. Multiplying by gross margin gives the profit a customer contributes, which is the number that actually funds your business.
A customer generating $1,000 in revenue at a 20% margin is worth $200 in real terms — very different from the same revenue at an 80% margin. Always run CLV on margin for decisions.
CLV sets your acquisition budget
The single most useful thing CLV does is cap what you can afford to spend acquiring a customer (your CAC). If a customer is worth $576 over their lifetime, spending $500 to acquire them barely works; spending $150 is healthy.
This is the LTV:CAC ratio, and a common healthy benchmark is around 3:1 — lifetime value roughly three times acquisition cost. Below that, growth is expensive; well above it, you may be under-spending on growth.
How to raise it
Because CLV is a product of four levers, you can grow it four ways: increase average order value, get customers buying more often, keep them longer (retention), or improve gross margin. Small gains in each compound into a big lift in lifetime value.
Retention is often the highest-leverage lever, since extending lifespan multiplies every other factor. The free calculator below computes CLV by segment and compares it to your CAC, so you can see which customers are worth investing in.
Questions
What's the difference between CLV and LTV?
They're the same thing — customer lifetime value. 'LTV' is just a shorter abbreviation used interchangeably, especially in subscription and SaaS businesses. Both refer to the total profit a customer generates over their relationship with you, and both are best measured on gross margin.
How is CLV different for a subscription business?
The idea is identical, but subscription businesses usually calculate lifespan from churn: average customer lifespan is roughly 1 divided by the monthly (or annual) churn rate. So CLV becomes average recurring revenue × gross margin ÷ churn rate. The principle — margin over the whole relationship — is the same.