Simple definitions for overcomplicated terms.
Definition
What is Churn Rate? Definition & Meaning
The Definition
Churn rate is the percentage of customers—or recurring revenue—that a business loses over a set period (monthly, quarterly, or annually). It is the single most important health metric of any subscription business, because it quietly undoes every new sale you close.
In Plain English
Picture your business as a bucket. New sales are the water you pour in at the top. Churn is the holes in the bottom. You can pour in as much water as you want, but if the holes are big enough, the bucket never fills.
This is why Silicon Valley is obsessed with churn: a company growing 100% a year with 5% monthly churn is sprinting on a treadmill, while a company growing 40% a year with 1% monthly churn is building a compounding machine.
Logo Churn vs. Revenue Churn
Churn can be measured two ways, and they tell you two different stories. A mature RevOps team tracks both:
Dimension | Logo Churn | Revenue Churn |
|---|---|---|
What it counts | Customers lost, regardless of size | Dollars lost, regardless of logo count |
Formula | Customers lost ÷ customers at period start | MRR lost ÷ MRR at period start |
What it reveals | Product and onboarding fit | Commercial concentration risk |
Easy to mislead with | Treating a $1K logo and a $500K logo as equal | Ignoring many small cancellations under one big renewal |
Gross vs. Net Revenue Churn
Within revenue churn, there are two flavors. Most SaaS investors care about both:
Gross revenue churn counts only lost revenue—cancellations and downgrades. It measures how much of your existing book you are bleeding, ignoring new growth inside that base.
Net revenue churn nets expansion revenue (upsell, seat adds, cross-sell) against those losses. If expansion exceeds losses, net churn goes negative—the coveted 'net dollar retention >100%' profile where last year's cohort grows even without new logos.
What Counts as a 'Good' Churn Rate
Benchmarks vary sharply by segment. KeyBanc Capital Markets' Private SaaS Company Survey has consistently shown median gross revenue retention around 91% across B2B SaaS—roughly 9% annual gross churn. Splitting by segment: SMB-focused SaaS tends to land at 3–5% monthly gross churn (35–50% annual), mid-market at 1–2% monthly, and enterprise often under 1% monthly. Best-in-class enterprise SaaS keeps annual gross churn below 5% and pairs it with logo retention above 95%. Pair this view with customer lifetime value and ARR to see whether churn is eroding compounding or just trimming the long tail.
Operationally, the modern churn-prevention stack leans on live disengagement signals—usage drops, champion departures, logged competitor evaluations—rather than waiting for the renewal call to discover a red account. The earlier the signal, the cheaper the save.
Related Questions
What is the difference between gross and net revenue churn?
Gross revenue churn counts only lost revenue—cancellations and downgrades—and ignores growth inside your existing base. Net revenue churn subtracts expansion revenue (upsells, seat adds, cross-sell) from those losses. If you expand more than you lose, net churn turns negative, meaning last year's customers alone grow your revenue this year. That 'negative churn' profile, or Net Dollar Retention above 100%, is the clearest signal of a durable SaaS business.
What is a healthy churn rate for B2B SaaS?
It depends sharply on segment. SMB SaaS typically runs 3–5% monthly gross revenue churn (35–50% annualized). Mid-market lands at 1–2% monthly. Enterprise SaaS usually keeps monthly gross churn under 1% and targets annual gross retention above 90%. Top-quartile enterprise players post annual gross churn under 5%. As a rule of thumb, if your annualized gross revenue churn is above 15%, something structural—onboarding, ICP fit, or product-market fit—is likely broken.
How do you calculate monthly churn rate?
The two standard formulas: customer churn = (customers lost in the month ÷ customers at start of month) × 100, and revenue churn = (MRR lost in the month ÷ MRR at start of month) × 100. Pick one definition and stick with it in every dashboard and board deck. Mixing customer and revenue churn in the same conversation is the single most common source of misread retention signals—a company can look healthy on logos while bleeding big accounts on revenue.