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LTV (customer lifetime value)

| Article: 5 min read | Analytics

LTV (lifetime value, also CLV or CLTV) is the amount a customer brings to the store over the whole time of the relationship. For management decisions it is better to calculate it not in revenue but in margin: how much money the store keeps from all of the customer's purchases after variable costs.

Explained in plain words

In its simplest form, LTV is the total amount a customer spends at a business over the whole relationship. If a buyer purchased dog food five times at 1,200 UAH, their LTV in revenue is 6,000 UAH.

Why know it. LTV shows how much you can spend to acquire a new customer and whether the first loss-making order will pay back. Without LTV, a store judges advertising by the first sale only and may drop a channel that brings people who then buy for years.

What matters is not only how many customers remain but also how much they buy. A study of more than 1.7 million customers in Australian and New Zealand online stores (2023–2024 data, published May 2025) showed that brands that retained fewer customers but increased their spending grew more than three times faster than those that retained more without growth in spending (study, May 2025). This is exactly what LTV measures. See also customer retention.

Formulas

1. Simple formula (in revenue):

LTV = average order value × number of purchases per period × customer lifespan

The periods must match: if purchase frequency is yearly, the lifespan is in years too.

2. Through margin:

LTV by margin = average order value × purchase frequency × lifespan × margin rate

The margin rate is written as a decimal (35% = 0.35). In the classic definition, CLV is the net profit a customer brings over the whole relationship (Wikipedia, Customer lifetime value). Calculations often use gross margin, but it is more accurate to take contribution profit after delivery, fees and returns, see unit economics.

3. Historical (actual):

12-month LTV = the sum of margin from all orders of customers who first bought in a given month, over 12 months ÷ the number of those customers

a16z advises this formula for young businesses: instead of forecasting "how many years the customer will live", look at actual value over 12 and 24 months (a16z).

Example (illustrative numbers)

The numbers are made up for the example. A cosmetics store: average order 1,500 UAH, a customer makes on average 2.2 orders over 24 months, margin after cost of goods, delivery and fees is 35%.

  • LTV in revenue: 1,500 × 2.2 = 3,300 UAH
  • LTV by margin: 3,300 × 0.35 = 1,155 UAH

If acquiring a new customer (CAC) costs 600 UAH, then by revenue the ratio looks like 5.5 : 1, and by margin 1.9 : 1. The first number looks like "we can safely scale", the second like "tight for now".

Why calculate by margin

A customer who bought 3,300 UAH worth did not bring the store 3,300 UAH. Most of it went on goods, delivery, fees. If you compare LTV in revenue with the cost of acquisition, the business systematically overpays for advertising.

a16z directly calls LTV the present value of the future net profit from a customer and warns against calculating on revenue or gross margin: LTV on contribution profit gives a tighter and more honest limit for acquisition spending (a16z).

Cohorts

A cohort is a group of customers who first bought in the same month. Instead of one average LTV, you look at how much margin the "January", "February", "March" customers brought after 3, 6, 12 months.

This shows:

  • whether new cohorts are improving (for example, after launching email campaigns);
  • which channels bring customers with higher LTV;
  • whether the audience "degrades" when you scale advertising.

a16z recommends tracking retention by cohorts: the first month is 100% of the cohort, then the share of those who still buy (a16z).

LTV:CAC

The ratio of LTV to CAC shows how many times a customer pays back the money spent on acquiring them.

  • 3 : 1 is a common benchmark, but the right target depends on margin and operating costs (source, October 2026). A range of 3 : 1 to 5 : 1 is also often cited as a sign of efficient acquisition; higher may mean the business is underinvesting in growth (source, 2024).
  • An overall ratio can hide a problem channel: calculate LTV and CAC separately by channel.
  • Also look at the payback period: profit forecast over several years does not pay for advertising today.

How different sources look at it

  • Simple calculators give a formula in revenue and a "margin-adjusted" version, with gross margin.
  • a16z considers only LTV on contribution profit correct, and for young companies actual 12- and 24-month LTV instead of a forecast.
  • The 3 : 1 benchmark is applied differently: some divide LTV in revenue, some in margin. Before comparing yourself with the "norm", find out how it was calculated.

Common mistakes

  • LTV in revenue instead of margin inflates the allowable CAC.
  • A "5-year" forecast for a store that is a year old. Actual LTV over 6 and 12 months is better.
  • One average for everyone. LTV of buyers from Rozetka, from Google Ads and from email can differ many times over.
  • Duplicate customers. Orders without registration with different phones or emails split one customer into several and understate LTV.
  • Refused and returned orders in the calculation. Count only paid and not returned ones.

FAQ

What is LTV in plain words? It is how much money one customer brings during the whole time they buy from you. It is most useful to count not revenue but margin from all their purchases.

How do you calculate a customer's LTV? Multiply average order value by the number of purchases per period and by customer lifespan, then by the margin rate. Or take the cohort's actual 12-month margin and divide by the number of customers in it.

What LTV to CAC ratio is considered normal? A common benchmark is 3 : 1, and a range of 3 : 1 to 5 : 1 is often cited. But the target depends on your margin and fixed costs, and it matters whether LTV is calculated in margin.

How is LTV different from CLV? It isn't; these are different abbreviations of the same metric: lifetime value and customer lifetime value.

How do you increase LTV? Increase the frequency of repeat purchases (mailings, a loyalty program, restock reminders), average order value and margin, and keep customers longer.

Sources

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