What Is Churn Rate? Definition, Examples & Best Practices
Churn Rate Churn rate is the percentage of customers (or revenue) lost during a specific time period. Customer churn rate is calculated as: (customers lost during period / customers at start of period) x 100. Revenue churn replaces customer count with MRR. A 5% monthly churn rate means you lose 5% of your customers every month.
Why churn rate matters
Churn is the silent killer of SaaS businesses. A 5% monthly churn rate means you lose nearly half your customers annually. No amount of acquisition can compensate for high churn. Reducing churn by even 1% has a compounding effect on revenue growth. PMs must understand churn to prioritize retention features.
How it works
Track churn monthly or quarterly. Segment by cohort (when users signed up), plan type, company size, and usage level. Identify patterns: do users churn after a specific event? After a certain number of days? After a usage drop? Use these patterns to build retention features and trigger interventions.
Common mistakes
Only measuring customer churn, not revenue churn (losing enterprise customers is worse than losing free users)
Not segmenting churn by cohort or plan
Focusing only on acquisition when churn is the real problem
Not investigating the reasons behind churn (exit surveys, usage data)
Related terms
How Vantage relates
Vantage connects to your analytics data so churn patterns can inform product specs. When you create a project to address retention, the AI can ground the PRD in your actual churn data rather than assumptions.