What is LTV (customer lifetime value)
Also known as: Lifetime Value, Customer Lifetime Value, CLV
LTV (lifetime value, also called CLV) is the value a customer generates for a business over the entire time they keep buying. The right calculation uses margin, not revenue: what is left from each sale after the cost of delivering it, added up across the relationship. It tells you how much you can afford to spend to win each customer.
LTV = average monthly revenue per customer × gross margin ÷ monthly churn
This is the version for recurring revenue, such as subscriptions and memberships. Dividing by monthly churn is the same as multiplying by the average customer lifetime: 5% monthly churn means, on average, 20 months of relationship.
For one-off sales, the math becomes: average order value × purchases per year × years as a customer × margin.
A gym charges $150 a month. After trainers, a share of the rent and maintenance, $90 of margin is left per member, a 60% margin. Each month, 5% of members cancel.
LTV = $150 × 60% ÷ 5% = $90 ÷ 0.05 = $1,800 per member.
If the gym spends $300 to win each member (its CAC), every new member returns six times what they cost. If churn rises to 10%, LTV halves to $900, with no change in price or cost.
Revenue or margin: the difference that changes the decision
Many spreadsheets calculate LTV with revenue: monthly fee times customer lifetime. The number comes out bigger and prettier, and it misleads. A store that bills $1,000 per customer but keeps $150 after product, shipping and fees cannot spend $800 to win that customer, however much the revenue figure suggests it can.
That is why the useful version uses gross margin: what is left from the sale after the direct cost of delivering the product or service. That amount is what pays for marketing, the team and profit.
LTV and CAC: the math that shows whether the business stands
LTV on its own does not tell you whether a company is doing well. It has to be compared with CAC, the cost of winning each customer. LTV ÷ CAC shows how many times a customer returns what they cost.
In his SaaS Metrics 2.0 guide, David Skok notes that the best subscription software companies have LTV above three times CAC, sometimes as high as seven or eight. Outside that market the ratio shifts, but the logic holds for any business: below 1, every new customer loses money; close to 1, the company is working to break even.
| What it usually means | |
|---|---|
| Below 1 | Each new customer costs more than they return |
| Between 1 and 3 | Customers pay for themselves, with little left to grow |
| Above 3 | Room to invest more in acquisition |
| Well above 5 | The company may be underinvesting and growing too slowly |
Why churn weighs so much on LTV
In the recurring revenue formula, churn sits in the denominator. That makes it the strongest lever on LTV: cutting cancellations from 5% to 2.5% a month doubles LTV, without touching price or margin.
Skok's guide includes a case like this: HubSpot cut its monthly revenue churn from 3.5% to 1.5%, and that pushed the lifetime value of each customer up considerably. It is why retention is often the cheapest investment for a company that already has a customer base.
How to increase LTV
- Reduce churn. Support that solves problems, a product that delivers what it promised, and proactive contact with customers showing signs of leaving.
- Improve margin. Renegotiate direct costs, or adjust the price for customers who already see the value.
- Sell more to existing customers. Upselling (a fuller version) and cross-selling (a complementary product) raise revenue per customer with no new acquisition cost.
- Increase purchase frequency. In retail and one-off services, reminding customers at the right moment is worth more than a discount.
Common calculation mistakes
- Using revenue instead of margin.
- Estimating customer lifetime from your best customers rather than the average.
- Calculating a single LTV for everyone, when different channels and plans behave differently.
- Projecting years of relationship for a business with only a few months of history.
Frequently asked questions
What does LTV stand for?
LTV stands for lifetime value, or customer lifetime value (CLV). It is how much a customer generates for a business over the whole relationship.
How do you calculate LTV?
For recurring revenue: average monthly revenue per customer, times gross margin, divided by monthly churn. For one-off sales: average order value, times purchases per year, times years as a customer, times margin.
Are LTV and CLV the same thing?
Yes. Both describe the same concept, the value of a customer over the relationship. CLV is more common in academic writing; LTV in day-to-day business.
What is a good LTV to CAC ratio?
In subscription software, the most quoted benchmark is LTV above three times CAC. Other industries differ, but below 1 every new customer loses money.
Should LTV use revenue or profit?
Gross margin. Revenue overstates how much a customer really leaves to pay for marketing, the team and profit.
Related terms
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Rodrigo Fávaro
Founder of ROO3, a marketing and technology agency in São José do Rio Preto, Brazil. Builds AI products running in production (Tobia, gerar.app, Pense Mercado) and maintains the AI Benchmark, a public ranking of AI models.
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