Churn Rate: recognising customer loss early

Churn Rate is the share of customers who stop using or paying for a product during a period. For one-off purchases, define inactivity carefully: not buying again within a short window does not necessarily mean a customer is lost.

Divide customers lost during the period by customers at the beginning, then multiply by 100%. If 8 of 200 starting customers leave in a month, monthly customer churn is 4%. New arrivals do not enlarge the starting denominator.

Retention and churn are complements only when they use the same starting group, activity definition and time window.

Customer churn counts people or accounts. Revenue churn measures lost recurring revenue. One large account may barely change the customer count but significantly affect income. Subscription teams should inspect both views.

Segment departures by customer age, plan and acquisition channel. Compare cancellation reasons, support issues and use of the core feature. Then test a focused improvement, such as a clearer first-use path or a better support handoff.