What is Churn Rate?
Customer churn rate (also known as attrition rate) is the percentage of your customers who cancel their subscriptions or fail to renew within a specific time period. It is one of the most critical metrics for any SaaS business.
How to Calculate Churn Rate
To calculate churn, simply divide the number of customers you lost during a period by the number of customers you had at the very beginning of that period, then multiply by 100.
Churn Rate = (Lost / Starting Customers) × 100For example, if you started the month with 500 customers and lost 25 of them, your monthly customer churn rate is 5%.
Why is High Churn Fatal?
A high churn rate fundamentally restricts a company's ability to grow. It forces a business to constantly spend money acquiring new customers just to replace the revenue they are losing (the "leaky bucket" problem). Lowering churn not only increases lifetime value (LTV) but massively accelerates compound revenue growth over time.
Frequently Asked Questions
What is a good churn rate for SaaS?
For early-stage SMB SaaS businesses, an acceptable monthly churn rate is typically around 3% to 5%. However, for enterprise SaaS companies with higher contract values, excellent monthly churn is generally under 1%.
What is Revenue Churn vs. Customer Churn?
Customer churn measures the number of distinct accounts lost. Revenue churn measures the total dollar value lost from those cancellations and downgrades. A company can have high customer churn but zero revenue churn if their remaining customers upgrade their tiers (Net Negative Churn).