Understanding gross churn: how to calculate it and what the benchmarks are.
Gross churn rate measures the percentage of customers or revenue lost in a given period, without accounting for expansion. It shows the raw rate of customer loss.
Gross churn only counts losses. Net churn subtracts expansion revenue. A company can have 5% gross churn but 0% net churn if expansion covers the losses. But high gross churn is still a problem: it means you are constantly replacing customers.
Logo churn measures the number of customers lost. Revenue churn measures the MRR lost. If you lose many small customers but keep large ones, revenue churn will be lower than logo churn.
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Understanding what is gross churn rate? as a concept is the easy part. The harder part — and the part that actually matters in a deal — is computing it accurately from a revenue ledger you did not build, under time pressure, with a seller whose interests are not aligned with yours. The workflow below is the one ChurnLens automates, but it is also the one you can follow manually in a spreadsheet if you understand the mechanics.
Step one: request the monthly MRR-by-customer ledger with contract start date, contract end date, plan type, and monthly revenue. This is a standard data-room ask and should be the first one you make, not the last. Step two: compute what is gross churn rate? under a consistent definition — exclude trials, include downgrades, separate annual from monthly plans. Step three: segment by acquisition cohort to see whether retention is improving or deteriorating over time. Step four: compare your reconstructed figure to the one in the seller's pitch deck.
The gap between steps two and four is the diligence finding. If your reconstructed what is gross churn rate? is materially worse than the reported figure, you have found the specific customers and cohorts driving the divergence, and you have the evidence to either renegotiate or walk. If the numbers match, you have verified the seller's claims and can proceed with confidence. Either outcome is worth the effort.