Ratio = CLTV ÷ CLP
CLTV applies gross margin. CLP also subtracts the cost of retaining and serving the customer across their life.
The ratio is therefore a direct measure of what keeping a customer costs, expressed as a multiple.
Reading it
- Close to 1.0: serving costs little beyond cost of revenue. Typical of
self-serve.
- Around 1.3 to 1.6: a normal assisted or mid-market motion.
- Above 2.0: more of the value is consumed by keeping the customer than by
delivering to them. Worth a hard look at whether the segment is viable.
The bands are observation rather than standard. What matters more is the direction over time.
A widening gap is the signal
Churn can hold steady while the cost of holding it rises. That is invisible in every retention metric and obvious here.
Three causes, in rough order of likelihood:
- Targeting drifted. Accounts outside the ICP need more help to stay. The
same root cause that shows up in retention cost.
- Onboarding weakened, so support absorbs what enablement should have
done once.
- A product gap covered by humans, which scales linearly with customers
and never improves on its own.
Keep the assumptions identical
Both terms must use the same churn rate, the same horizon cap, and the same segment. Any mismatch and the ratio measures the mismatch rather than the cost of serving, which is easy to do accidentally because the two figures are often produced by different teams.
A worked example
Capped five-year CLTV of $29,900. Retention and service costs attributable to that customer over the same five years: $9,400. So CLP is $20,500.
Ratio = 29,900 ÷ 20,500 = 1.46
If next year the same segment produces 29,900 and 17,900, the ratio moves to 1.67 with no change in churn or price. Retention got more expensive, and nothing else on the dashboard would have said so.
The traps
- Different churn or horizon assumptions between the two terms.
- Attributing shared costs arbitrarily rather than by a stated rule.
- Reading the level rather than the trend.
- Blending segments, which is the failure this ratio exists to expose.
Where this sits
This ratio is Measurement in the Tenbound Pipeline Architecture Standard, and it is the sharpest financial expression of a Market failure available. Bad targeting shows up here as a rising cost of service long before it shows up as churn.