Overview
CLTV/CAC summarizes whether the value of a customer justifies the cost to acquire them. It is a fast reality check on growth efficiency.
The CLTV/CAC ratio compares the value of a customer over time to the cost to acquire them.
Definition
Target ≈3:1 or better, but interpret alongside churn and payback. Extremely high ratios can signal under‑investment if growth is constrained.
The CLTV/CAC ratio compares the value generated by a customer over time to the cost to acquire them. It is a quick check on the efficiency of your go‑to‑market. Track by channel and segment, and interpret alongside churn and payback period to get a fuller picture of sustainability.
Formula
Use margin‑adjusted LTV when possible.
Divide margin‑adjusted CLTV by fully loaded CAC for the same segment and window.
CLTV/CAC = CLTV / CACUse the CLTV/CAC Ratio to run this formula with your own numbers.
Example
$1,000 LTV, $250 CAC → 4:1.
Provide a simple ratio example and explain how segment differences can change the result.
Common pitfalls
Using gross CLTV, mixing signups with customers, or ignoring payback duration distorts the ratio.
- Using gross CLTV not margin‑adjusted
- Mixing signups with customers
- Ignoring payback duration
Benchmarks
Healthy ≈ 3:1; strong 4–5:1; >6:1 may indicate under‑investment.
Healthy ≈ 3:1; strong 4–5:1. Context matters; very high can imply missed growth investment.
Notes
Track by channel and segment and pair with churn and payback for a full picture.
- Track by channel and segment
- Interpret alongside churn and payback