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Churn Rate Cost Calculator
See what each lost customer really costs you
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About this tool
5% monthly churn looks small. It isn\'t — that\'s 46% annual customer loss. By the end of year 2, you\'ve replaced your entire customer base, and you paid CAC twice for nothing.
This calculator shows you the three numbers that matter: lost MRR per month, lost ARR per year, and what it costs to replace those churned customers at your CAC. Most operators discover it costs more to refill the leaky bucket than to fix the leak.
How to use it
- 1 Enter active customers.
- 2 Enter average MRR per customer.
- 3 Set monthly churn rate (industry healthy: <2%).
- 4 Enter average CAC to replace one customer.
- 5 Read lost MRR, lost ARR and yearly replacement cost.
What you get
- The hidden multiplier — Monthly churn looks small, annual loss is brutal. The calculator shows both.
- Replacement cost — Includes the CAC to refill churned customers — usually 2–3x the lost MRR alone.
- 90-day reality check — Reducing churn by 1pt typically returns more than acquiring 10pt more new customers.
CRM Business Hub Do it for every case with CRM Business Hub
See the cost of one churned client — or get early-churn signals + auto-trigger save campaigns in Service Manager.
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