Definition
Last reviewed June 7, 2026
Monthly logo churn is calculated as: (Customers lost in the month) ÷ (Customers at the start of the month). Annual churn is the same idea over a year. Revenue churn uses ARR instead of customer count. The two ratios should be reported side by side because the gap between them reveals concentration risk: a wide gap means small customers churn fast and large ones stay, or vice versa.
Gross Revenue Churn measures only the lost revenue. Net Revenue Churn adds expansion: (Churn - Expansion) ÷ Starting ARR. Net Churn can be negative when expansion exceeds churn, which is the same condition that produces NRR above 100%. Net Churn negative is the healthiest state a subscription business can be in and the strongest signal of product-market fit.
INSIDEA's pattern with customers is to track logo churn, gross revenue churn, and net revenue churn separately, segmented by ICP, by tenure, and by acquisition channel. The patterns inside churn are diagnostic: if a specific ICP segment churns at 3x the average, that segment should not be acquired. If first-90-day churn is high, the onboarding motion is broken. Churn is the data the customer success and product teams should be obsessing over.
FAQs
Logo churn counts customers lost. Revenue churn counts ARR lost. They often tell different stories: a business can have low logo churn but high revenue churn if it loses one big customer, or the opposite. Both should be reported. The gap between them reveals concentration risk.
For B2B SaaS, monthly logo churn under 1% is excellent (under 12% annualized), 1-2% is healthy, 2-4% is concerning, and over 4% is a serious problem. Revenue churn benchmarks are similar. Net Revenue Churn under 0% (negative churn) is best-in-class and signals strong expansion.
Net Revenue Churn equals (Churned ARR - Expansion ARR) ÷ Starting ARR. NRR equals 100% minus Net Revenue Churn. So Net Revenue Churn of -10% is the same as NRR of 110%. The two metrics describe the same dynamic from opposite directions.
Segment churn by ICP, tenure, and acquisition channel. If specific ICP segments churn at 3x the average, you are acquiring the wrong customers. If first-90-day churn is high, onboarding is broken. If churn happens at renewal, the customer success motion has not built enough value. The segmentation tells you exactly where the leak is.
Related terms
Net Revenue Retention (NRR) measures how much revenue a SaaS business retains from a cohort of customers over a period, including expansion, contraction, and churn. NRR is calculated as: (Starting ARR + Expansion - Contraction - Churn) ÷ Starting ARR. NRR over 100% means the cohort grew without new logos. Public SaaS leaders run 110-130% NRR and it is one of the strongest predictors of long-term value.
Annual Recurring Revenue (ARR) is the normalized annualized revenue a subscription business expects from its active contracts. It is calculated by taking MRR × 12 or by summing each subscription's annualized fee. ARR is the headline number SaaS investors and operators track because it represents the durable, predictable revenue base of the business stripped of one-off variability.
Monthly Recurring Revenue (MRR) is the predictable, normalised revenue a SaaS business expects each month from its subscription customers. It is calculated by summing each active subscription's monthly fee, with annual contracts divided by 12. MRR is the single most important metric in subscription-software finance because it predicts ARR, growth rate, and runway without requiring the volatility of one-off bookings to interpret.
Customer Lifetime Value (LTV) is the total gross profit a customer is expected to deliver over the length of the relationship. For subscription businesses, the standard formula is: (average revenue per customer × gross margin) ÷ customer churn rate. LTV is the value side of the LTV-to-CAC ratio, which is the single most-cited measure of subscription business health.
Customer Acquisition Cost (CAC) is the total sales and marketing spend required to win a new customer, divided by the number of new customers acquired in the period. It is the cleanest single measure of acquisition efficiency: are you spending more or less than the next dollar of customer revenue is worth.
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