calculate your churn rate
and revenue impact
enter your customer count and cancellations. instantly see your monthly and annual churn rate, customer half-life, revenue impact, and how you compare to industry benchmarks.
How to use this churn rate calculator
Enter the number of customers you had at the start of the period, the number of customers you lost during that period, and the period length in months. If you track churn monthly, set the period to 1 month. For quarterly data, use 3 months — the calculator will normalize to a monthly rate.
Optionally enter your average revenue per customer to see the dollar impact of churn. This helps you understand not just how many customers you're losing, but how much revenue walks out the door each month.
What is churn rate?
Churn rate measures the percentage of customers who cancel their subscription during a given period. It's the inverse of retention — if your monthly churn is 5%, your monthly retention is 95%. Churn is arguably the most important metric for a subscription business because it determines your customer lifetime and puts a ceiling on growth.
Even small differences in churn have massive long-term effects. At 3% monthly churn, you retain about 69% of customers after a year. At 8%, you retain only 36%. This means a 5-percentage-point improvement nearly doubles your customer base over 12 months — without acquiring a single new customer.
Churn rate benchmarks for solo founders
Healthy churn rates vary significantly by business type and customer segment. Here are typical monthly churn ranges:
- B2B SaaS (SMB): 3–7% monthly is normal. Under 5% is good.
- B2B SaaS (Enterprise): Under 1% monthly. Annual contracts help.
- B2C SaaS: 5–10% monthly. Consumer products are inherently churnrier.
- Mobile apps: 8–15%+ monthly. High competition and low switching costs.