Glossary

Attrition Rate

Attrition rate (also known as churn rate) is the percentage of customers who stop doing business with a company over a given time period. It is one of the most important metrics for any subscription or membership-based business.

How to Calculate Attrition Rate

Attrition Rate = (Customers Lost During Period ÷ Customers at Start of Period) × 100

For example, if you start the month with 500 members and lose 25, your monthly attrition rate is 5%.

Why Attrition Rate Matters

High attrition directly impacts revenue and growth. Acquiring a new customer costs 5-25x more than retaining an existing one. Even a small reduction in attrition — say from 5% to 4% monthly — can dramatically increase your customer lifetime value and annual revenue.

How to Reduce Attrition

  • Identify at-risk customers early using engagement data
  • Automate win-back campaigns before members fully lapse
  • Improve onboarding to build habits in the first 30 days
  • Use behavioral triggers to re-engage inactive customers
  • Collect and act on feedback to fix experience issues
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