Question 1

What is the LTV:CAC ratio?

Accepted Answer

It compares customer lifetime value to customer acquisition cost, showing how much lifetime value a business generates for every unit of money spent acquiring a customer.

Question 2

What is the formula for the LTV:CAC ratio?

Accepted Answer

Customer lifetime value divided by customer acquisition cost. A result of 3 means a customer is worth three times what it costs to acquire them, written as 3:1.

Question 3

What is a good LTV:CAC ratio?

Accepted Answer

Around 3:1 is the widely cited healthy benchmark, but it is a floor rather than a target, and the right level depends on the business model and stage.

Question 4

Where does the 3:1 benchmark come from?

Accepted Answer

It was popularized by investor David Skok around 2010, derived from observations of mature, public software companies at steady state, and is often misapplied to other stages and models.

Question 5

Why is a very high LTV:CAC ratio not always good?

Accepted Answer

A ratio like 6:1 or higher usually signals under-investment in growth, meaning the business could profitably acquire many more customers by spending more on acquisition.

Question 6

Why must the ratio be read with the payback period?

Accepted Answer

Because the ratio describes eventual return, not cash timing. A healthy ratio with a very long payback period can still exhaust a business’s cash before customers become profitable.

Question 7

What is the CAC payback period?

Accepted Answer

The number of months of customer profit required to earn back the cost of acquiring that customer. Shorter payback frees cash to reinvest in more acquisition.

Question 8

Should LTV be based on revenue or profit?

Accepted Answer

Profit, or gross margin, not raw revenue. Using revenue overstates lifetime value and the ratio, tempting a business to overspend on acquisition it cannot actually afford.

Question 9

How can product managers improve the ratio?

Accepted Answer

By raising lifetime value through better retention, activation, and expansion, and lowering acquisition cost through referrals and improved conversion, many of which are product levers.

Question 10

Is the same benchmark right for every business?

Accepted Answer

No. The 3:1 rule came from mature software businesses. Different business models, margins, and stages call for different healthy thresholds.

What Is the LTV:CAC Ratio and Why It Matters?

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Q1: What does the LTV:CAC ratio compare?

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