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Business & eCommerceGenerated accuracy model review: 2026-05-06
SaaS Churn Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Customer churn = lost customers / starting customers. Gross revenue churn = churned MRR / starting MRR. Net revenue churn = (churned MRR - expansion MRR) / starting MRR.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Starting Customers: 1,000
- Lost Customers: 40
- Starting MRR: $100,000
- Churned MRR: $5,000
- Expansion MRR: $7,000
Expected outputs
- Customer Churn Rate: 4.00%
- Gross Revenue Churn: 5.00%
- Net Revenue Churn: -2.00%
- Retained Customers: 960
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- Rates are user-entered planning assumptions.
- The estimate does not replace accounting, tax, payroll, legal, or marketplace-specific guidance.
- Inputs are processed locally in the browser.
Unit handling
- Starting Customers accepts numeric values.
- Lost Customers accepts numeric values.
- Starting MRR accepts values in $.
- Churned MRR accepts values in $.
- Expansion MRR accepts values in $.
- Customer Churn Rate is displayed as a percentage.
- Gross Revenue Churn is displayed as a percentage.
- Net Revenue Churn is displayed as a percentage.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Percent outputs are displayed with two decimal places.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current saas-churn-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for SaaS Churn Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.