Free Attrition Rate Calculator

Attrition is the silent killer of growth. You can be adding new customers, subscribers, or employees at a healthy clip — but if attrition is eating away at your base just as fast, you're running on a treadmill going nowhere.

This calculator works for any context: employee turnover (HR), customer churn (SaaS), subscriber attrition (email marketing), or student dropout rates. It gives you the attrition rate, retention rate, annualized projections, half-life analysis, and — for employees — estimated replacement costs.

For email marketers, subscriber attrition is especially important. A healthy email list should have less than 0.5-1% monthly attrition (unsubscribes + bounces combined). If your list is shrinking faster than you're growing it, check our list growth calculator to see the net picture, and review your unsubscribe rate and bounce rate to find the root cause.

For SaaS companies, customer attrition is essentially your churn rate — the metric that determines whether your business can sustain long-term growth. Pair attrition data with your MRR and customer lifetime value for a complete health check.