LTV/CAC ratio is a unit economics metric that compares the estimated lifetime value of a customer to the cost of acquiring that customer. It is commonly used to give a quick view of how efficiently a business turns customer acquisition spending into economic value.
What the LTV/CAC Ratio Shows
The ratio is usually expressed as a simple relationship between customer lifetime value and customer acquisition cost. A higher ratio generally suggests that a company earns more value from a customer relative to what it spends to acquire that customer, while a lower ratio may indicate weaker acquisition efficiency or lower customer economics.
On its own, the metric is only a shorthand. Its meaning depends on how lifetime value is defined, how acquisition cost is measured, and whether the underlying assumptions are stable across time.
Why It Matters in Analysis
Investors often use the LTV/CAC ratio as a reference point when reviewing subscription and recurring revenue businesses. It can help frame whether customer growth appears economically attractive, but it should not be treated as a complete assessment of business quality by itself.
For a broader view of how this metric fits into business analysis, see unit economics.
Limits of the Metric
The LTV/CAC ratio can look precise while still being highly assumption-sensitive. Different companies may calculate lifetime value in different ways, include different cost categories in acquisition cost, or present adjusted figures that are not directly comparable. Because of that, the metric is most useful as a directional indicator rather than a standalone conclusion.
It is also important to view the ratio together with retention, gross margin, payback dynamics, and overall business model context.
FAQ
Is a higher LTV/CAC ratio always better?
Not always. A higher ratio may look attractive, but its usefulness depends on how the inputs are defined and whether the economics are sustainable.
Is LTV/CAC ratio the same as unit economics?
No. LTV/CAC ratio is one metric often used within unit economics, but unit economics covers a broader assessment of customer-level profitability and business efficiency.
Can the LTV/CAC ratio be compared across companies?
Only with caution. Comparisons can be misleading when companies use different formulas, time horizons, or cost assumptions.