SaaS & retention
Revenue Churn Calculator
Measure recurring revenue lost from an opening customer cohort as a percentage of its starting revenue.
Use revenue churn when lost dollars matter more than the number of accounts. Use customer churn for logo loss and gross revenue retention for the retained share.
What the result means
This is the share of opening cohort recurring revenue lost through full customer churn. It excludes downgrades and expansion and is labeled by the chosen period.
The formula
(Revenue lost to churn / opening cohort revenue) * 100
Results are displayed to at most two decimal places. Calculations use the unrounded inputs.
A worked example
Put the formula to work
- Opening cohort revenue (currency per period)
- 50,000
- Revenue lost to churn (currency per period)
- 2,500
Revenue churn rate: 5%
Losing 2,500 of 50,000 opening recurring revenue gives 5% revenue churn for the period.
How to use this calculator
- Freeze the opening cohort and recurring-revenue basis.
- Count only full-customer churn, not downgrades.
- Divide lost recurring revenue by opening cohort revenue.
- Label the result with its period and revenue basis.
Why this number matters
Revenue-weighted churn shows whether large accounts are leaving even when logo counts look stable.
Input definitions
- Opening cohort revenue (currency per period)
- Recurring revenue from the same customer cohort at the start of the period; must be greater than zero.
- Revenue lost to churn (currency per period)
- Recurring revenue lost when opening-cohort customers fully leave; cannot exceed starting revenue.
Assumptions and limitations
- Downgrades and expansions require separate measures.
- A blended cohort can hide concentration in a few accounts.
- Monthly and annual rates should not be treated as interchangeable.
Methodology
The default result and worked example use the same calculation functions as the interactive tool. The formula cannot verify the quality or scope of your source data.
Read our calculation methodology
Last updated .