Churn Rate
Churn rate is the percentage of customers or revenue a business loses over a given period. The most important retention metric for any subscription business.
What Is Churn Rate?
Churn rate measures the rate at which customers (or revenue) stop doing business with a company over a defined period — typically a month or year.
Monthly Customer Churn = Customers Lost in Month ÷ Customers at Start of Month
If you started the month with 200 customers and lost 10, your monthly churn rate is 5%.
Two Types of Churn
1. Customer (Logo) Churn
The percentage of customer accounts lost:
Customers at start: 200
Customers lost: 10
Customer churn: 10 / 200 = 5%2. Revenue (MRR) Churn
The percentage of recurring revenue lost — more important because not all customers are equal:
MRR at start: $50,000
MRR lost from cancellations: $2,000
Revenue churn: 2,000 / 50,000 = 4%Revenue churn is more meaningful than logo churn for businesses where customers have very different contract sizes.
Negative Churn
One of the most powerful concepts in SaaS: negative net revenue churn happens when expansion revenue from existing customers (upgrades, upsells, additional seats) exceeds revenue lost from cancellations.
If you lose $2,000/month in churned MRR but gain $3,500 in expansions, your net revenue churn is -3% — your base grows even if you acquire zero new customers.
Churn Rate Benchmarks
| Business Type | Healthy Monthly Churn |
|---|---|
| B2B SaaS (SMB) | 2–5% |
| B2B SaaS (Enterprise) | 0.5–1% |
| B2C Subscription | 5–8% |
| Consumer apps | 10–25% |
Annual churn is roughly monthly churn × 12 (though cohort analysis gives more accurate figures).
The Compounding Effect of Churn
Churn compounds destructively. At 5% monthly churn, you lose roughly 46% of your customer base in a year. At 2%, you lose 21%.
This is why improving retention from 5% to 3% monthly churn has far more value than reducing CAC by 20%.
Why Customers Churn
Understanding why customers leave is as important as knowing the rate:
- Value not realized — poor onboarding, feature complexity
- Competitive alternatives — a better or cheaper option emerged
- Budget cuts — especially true in B2B during downturns
- Use case mismatch — you acquired customers you shouldn’t have
- Product gaps — missing features critical to their workflow
The best churn reduction tool is talking to churned customers within 48 hours of cancellation.
Key Takeaway
Churn is a silent killer. A business growing 20% per month with 8% monthly churn is essentially running on a treadmill. Fix churn before you scale — pouring new customers into a leaky bucket doesn’t build a business.