Free calculator: churn and retention
Churn and retention calculator
See how monthly churn, expansion, and new-customer growth compound into the customer base and recurring revenue you have months from now.
Inputs and formula
- Customers next month = customers × (1 − churn) + new customers.
- MRR next month = MRR × (1 − churn + expansion) + new customers × new-customer revenue.
- Monthly net revenue retention = 1 − churn + expansion, before new customers.
Worked example
With 250 customers, 4% monthly churn, 1% expansion, and 40 new customers per month, the model makes the compounding effect of retention visible across a 12-month plan.
Planning estimate caveat
This is a cohort-free planning model. Use customer-level retention and revenue cohorts when segments, downgrades, or expansion behavior differ materially.
Put the decision into motion
Start a 14-day free trial and give your company a persistent AI executive team that keeps working between founder check-ins.