Customer Churn Rate
Measure customers lost from the starting customer cohort.
Your numbers
Customer churn
Business ratio based on your consistent-period inputs. Accounting definitions and industry comparisons may differ.
Scenario comparison
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Formula
Use c = L/S and r = 1−c. S is starting customers and L is customers lost from that starting group. c is the churn fraction and r is the retained fraction; new customers do not enter either numerator.
Measure customers lost from the starting customer cohort.
Worked example
- Starting customers
- 1000
- Starting-cohort customers lost
- 50
- Customer churn
- 5 %
- Cohort retention
- 95 %
Scope and limitations
Business ratio based on your consistent-period inputs. Accounting definitions and industry comparisons may differ.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 2e7b52507e84 · Example checked: