KnowledgeCustomer Churn Rate
Churn · The share of existing customers who leave during a period.
Understand Churn in context.
Simply explained explanation
The share of existing customers who leave during a period.
Professional explanation
Customer attrition among the starting customer base according to a defined inactivity or cancellation rule.
Analytical explanation
High churn weakens LTV/CAC economics even when new acquisition is strong. Distinguish voluntary cancellation from failed payments.
Technical explanation
Common subscription formula: customers lost during period / customers at start × 100. In non-contract commerce, churn requires an explicit inactivity rule.
Four complementary explanations — choose your level. Technical definitions are platform-specific where noted.
↗ How to use it
Combine with cohort survival and churn reasons.
⚠ Common interpretation mistake
“Churned” is not directly observable without a business-specific rule.
Metric calculator
Adjust the inputs to see how the metric is calculated.