Quick Definition
Churn (also called customer churn or attrition) is when customers stop doing business with you. In subscription businesses, churn occurs when a customer cancels their subscription or fails to renew.
Looking for formulas? See How to Calculate Churn Rate for step-by-step calculations and our Churn Rate Calculator.
What Does Churn Mean in Business?
In business, churn represents lost customers and lost revenue. It's one of the most critical metrics for any subscription-based company because:
- It directly impacts revenue - Every churned customer means recurring revenue lost
- It affects growth - High churn can cancel out new customer acquisition
- It's a health indicator - Rising churn often signals product or service issues
- It compounds over time - Even small churn rates become significant annually
For SaaS companies, a "healthy" monthly churn rate is typically 3-5% for B2C and under 2% for B2B.
Types of Churn
Voluntary Churn
Voluntary churn happens when customers actively decide to leave. Common reasons include:
- Dissatisfaction with the product
- Finding a better alternative
- No longer needing the service
- Price concerns
- Poor customer support experience
Compare how different tools handle voluntary churn: Rekko vs Churnkey (which focuses on cancel flows).
Involuntary Churn
Involuntary churn occurs when customers lose access due to payment failures, not because they wanted to leave. Causes include:
- Expired credit cards
- Insufficient funds
- Bank security flags
- Card number changes
Key insight: 20-40% of all churn is involuntary and completely preventable with proper dunning processes.
Read our complete guide: Involuntary Churn: The $440B Revenue Killer.
How Churn Differs from Attrition
While often used interchangeably:
- Churn typically refers to subscription businesses and measures customers who cancel
- Attrition is broader and can include natural customer loss in any business model
In practice, most SaaS companies use "churn" as the standard term.
Calculating Churn
The basic churn rate formula:
Monthly Churn Rate = (Customers Lost / Customers at Start of Month) × 100
For example:
- Start of month: 1,000 customers
- End of month: 950 customers (50 churned)
- Churn rate: 50 / 1,000 = 5%
Resources:
- How to Calculate Churn Rate - Complete formulas and examples
- Churn Rate Calculator - Free interactive tool
- ROI Calculator - See how much you can recover
Why Churn Matters More Than You Think
The Compound Effect
A 5% monthly churn rate might seem small, but over a year:
| Month | Customers (starting 1,000) |
|---|---|
| 1 | 950 |
| 6 | 735 |
| 12 | 540 |
You'd lose 46% of your customer base in one year.
The Revenue Impact
Churn doesn't just affect customer count—it affects revenue:
- Direct revenue loss from churned subscriptions
- Lost expansion revenue (churned customers can't upgrade)
- Wasted acquisition cost (CAC that never recovered)
- Lower customer lifetime value (LTV)
Churn Benchmarks by Industry
| Industry | Good Monthly Churn | Average | Needs Improvement |
|---|---|---|---|
| B2B SaaS | < 2% | 3-5% | > 7% |
| B2C SaaS | < 4% | 5-7% | > 10% |
| Media/Streaming | < 5% | 6-8% | > 12% |
| Fitness/Wellness | < 6% | 8-10% | > 15% |
Proven Strategies to Reduce Churn
1. Separate Voluntary from Involuntary Churn
You can't fix what you don't measure. Track:
- Why customers are leaving (exit surveys)
- How many are leaving due to failed payments
2. Implement Dunning for Failed Payments
Automated dunning sequences can recover 60-80% of failed payments. This includes:
- Email notifications - see 7 Failed Payment Email Templates
- SMS reminders - learn about multi-channel dunning
- Pre-authenticated payment update links
Compare dunning tools: Rekko vs Churn Buster | Rekko vs Stripe Smart Retries
3. Improve Onboarding
Many customers churn because they never got value from your product. Better onboarding reduces early churn by 20-30%.
4. Monitor Usage Patterns
Identify at-risk customers before they churn:
- Declining login frequency
- Reduced feature usage
- Support ticket patterns
5. Act on Feedback
Regular NPS surveys and customer feedback help you fix issues before they cause churn.
Related: Best Dunning Software 2026 - Compare all your options.
The True Cost of Churn
For a SaaS company with:
- $100,000 MRR
- 5% monthly churn
- $500 CAC per customer
- 24-month expected LTV
Monthly churn cost:
- Lost MRR: $5,000
- Wasted CAC: ~$2,500
- Lost LTV: $60,000+ over time
That's $60,000+ in lost value every month from churn.
Key Takeaways
- Churn = customers leaving - Either voluntarily or involuntarily
- It compounds quickly - Small monthly rates become massive annual losses
- 20-40% is preventable - Involuntary churn from failed payments can be recovered
- Measure both types - Different problems require different solutions
- Focus on retention - It costs 5-7x more to acquire than retain
Reduce Involuntary Churn with Rekko
Up to 40% of your churn might be from failed payments—customers who want to stay but have a card issue.
Rekko automatically detects failed Stripe payments and sends multi-channel recovery sequences (email + SMS) to get customers to update their payment method.