Free churn calculator
SaaS Revenue Leak Calculator
Calculate how much recurring revenue churn could quietly remove over the next twelve months. Instant, private, and completely free.
Find your revenue leak
See what churn removes even while you continue adding new customers.
$197K
The cumulative recurring revenue lost to 4% monthly churn over the next year.
Methodology
How this calculator works
Churn compounds. Losing a percentage of recurring revenue every month creates a widening gap between the revenue path you could have kept and the one you actually retain—even when new sales remain constant.
The calculator projects twelve months one period at a time. At the start of each month, the selected percentage of existing MRR churns, then the same amount of new MRR is added. The revenue leak is the cumulative gap versus an identical no-churn path.
- Next-month MRR equals current MRR × (1 − churn rate) + new MRR.
- Repeat the calculation for each of the next twelve months.
- Build a comparison path with the same new MRR and zero churn.
- Add the monthly differences to calculate the twelve-month revenue leak.
Questions
Frequently asked questions
- What is SaaS revenue churn?
- Revenue churn is the percentage of recurring revenue lost during a period through cancellations and downgrades. This calculator uses monthly gross revenue churn.
- What is a good monthly churn rate?
- It depends on customer size, contract length, and stage. Lower is generally better; the scorecard labels 2% or less excellent and 4% or less healthy as a simple directional reference.
- Why add new MRR after churn?
- The model uses a consistent monthly sequence so every scenario is comparable. Switching the order makes only a small timing difference but would change the exact output.
- Does this predict future revenue?
- No. It is a constant-rate scenario. Real churn and new sales vary, so use the result to understand sensitivity rather than as a financial forecast.
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