Churn rate
Churn rate is a customer attrition metric that shows the percentage of users who stop using a product or service over a certain period. It helps evaluate customer retention, service quality, and business model stability.
What is churn rate?
Churn rate is the percentage of customers who have discontinued using a product: stopped purchasing, did not renew a subscription, deleted an app, or ceased using a service.
This metric is especially important for SaaS, subscription services, mobile apps, online education, and e-commerce.
Example:
Out of 1,000 service users, 80 stopped using it—the churn rate is 8%.
Formula for calculating churn rate
The classic formula:
Churn Rate = (Number of Lost Customers / Number of Customers at the Start of the Period) × 100%
Example:
- At the beginning of the month: 500 subscribers
- At the end: 470
- Attrition: 30
30 ÷ 500 × 100 = 6%
Types of churn
- Customer Churn
Customer attrition—people stop using the product. - Revenue Churn
Revenue attrition—customers remain but pay less (downgrade). - Voluntary Churn
Voluntary attrition—the customer cancels the service themselves. - Involuntary Churn
Unintentional attrition—payment errors, invalid cards.
Why is churn rate critical?
- Reveals product weaknesses
- Reflects customer satisfaction
- Impacts long-term revenue
- Directly linked to LTV (Lifetime Value)
- Affects customer acquisition cost (CAC)
- Determines business scalability
High churn can undermine even a fast-growing company.
Normal churn rate values
Vary by industry:
- SaaS B2B: 2–7% per month
- SaaS B2C: 5–15%
- Mobile apps: 10–30%
- Online education: 8–20%
Reasons for increased churn rate
- Poor service quality
- Complex or inconvenient interface
- Lack of value for the user
- Poor onboarding
- High subscription cost
- Weak customer support
- Payment errors
- Competitors offering better solutions
How to reduce churn rate
- Improve onboarding
Show users how to use the product, help them take their first steps. - Focus on customer success
Regular check-ins, answering questions, monitoring customer metrics. - Continuously improve the product
Fix bugs, add new features. - Analyze reasons for churn
Surveys, cancellation forms, behavioral metrics. - Implement retention strategies
Discounts, subscription freezes, personalized offers. - Manage payment notifications
Renewal reminders, card update prompts. - Increase product value
More benefits → lower likelihood of churn.
Relationship between Churn Rate and LTV
If churn is high—LTV decreases.
If churn decreases—LTV grows even without additional advertising.
Formula:
LTV ∝ 1 / Churn Rate
Examples of churn rate interpretation
- 5% — good for SaaS
- 10%+ — product improvement needed
- 20%+ — critical level, urgent action required
Summary
Churn rate is a key customer retention metric that shows how many users leave a product. It directly impacts revenue, marketing ROI, and business sustainability.
