Churn Rate Calculator
Calculate customer churn for any period: customers lost divided by customers at the start, with SaaS benchmarks.
Churn rate
What it measures
Churn rate is the share of customers you had at the start of a period who cancelled during it. Count only customers who could have churned; new signups in the period stay out of the denominator.
Why it matters
Churn compounds silently. Three percent monthly sounds small and removes a third of your base in a year. It is the single strongest input on lifetime value.
A worked example
Start the month with 400 customers and lose 12, and churn is 3 percent. Run that for twelve months and only 69 percent of the original base remains.
How to read and improve it
Fix onboarding first. Most churn is decided in the first weeks, when customers either reach value or quietly give up.
Frequently asked questions
Monthly or annual churn?
Track monthly for operations and annual for board reporting. Small monthly numbers hide big annual effects, so always know both.
Is revenue churn different?
Yes. Customer churn counts logos, revenue churn counts money. A business losing only small accounts can have high logo churn and mild revenue churn.
More in SaaS metrics: SaaS CAC Calculator · Customer Lifetime Value Calculator · MRR Calculator
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