Free Churn Rate Calculator — SaaS Revenue Loss from Customer Churn
Churn rate is the percentage of customers who cancel their subscription in a given period. Even a seemingly small monthly churn of 5% compounds to a 46% annual customer loss. This calculator shows the MRR erosion and total revenue impact of your current churn rate over 12 months, and what improving churn by 1% saves.
How to use Churn Rate Impact Calculator
Enter starting MRR and customer count
Input your current monthly recurring revenue and number of active customers.
Set monthly churn rate
Enter your monthly churn rate as a percentage. Average SaaS churn is 3–7%/month.
See 12-month impact
The calculator shows MRR and customer count at each month, total revenue lost, and savings from 1% churn reduction.
Frequently asked questions
Churn rate is the percentage of customers who cancel or do not renew their subscription in a given period. Monthly churn = customers lost / customers at start of month × 100. Annual churn = 1 - (1 - monthly churn)^12.
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Further reading
Authority documentation and specifications behind this tool.
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