SaaS Churn Rate Calculator
Churn is the silent killer of SaaS businesses, and measuring it correctly is essential because it quietly erodes the recurring revenue you work so hard to build. There are two lenses that matter. Logo churn (customer churn) counts the percentage of customers who cancel in a period, while revenue churn measures the percentage of MRR lost. These numbers can tell very different stories: a company might lose many small customers yet keep its revenue nearly intact, or lose a single whale and suffer painful revenue churn while logo churn looks fine. Understanding both — and driving them down — is the foundation of durable growth, high lifetime value, and net revenue retention. Enter your customer and MRR figures to measure churn from both angles.
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Results update live as you type. Estimates only — not financial, tax, or investment advice.
The Formula
Logo Churn = Customers Lost ÷ Starting Customers × 100; Revenue Churn = MRR Lost ÷ Starting MRR × 100
Understanding the SaaS Churn Rate Calculator
Logo churn and revenue churn diverge because not all customers are equal. If your churned customers are disproportionately small accounts, revenue churn will be lower than logo churn — a reassuring sign that your most valuable customers are sticking around. If large accounts are leaving, revenue churn will exceed logo churn, a serious warning even if the customer count looks stable. Segmenting churn by plan size, cohort, and tenure reveals where retention is actually breaking.
The most sophisticated teams also watch net revenue churn, which factors in expansion revenue from existing customers. When upgrades and cross-sells outpace losses, net revenue churn goes negative — meaning your existing customer base grows revenue on its own even if you never sign another new logo. That is the holy grail of SaaS economics. High churn, by contrast, caps lifetime value, lengthens payback, and forces you onto an ever-faster acquisition treadmill just to stand still.
Frequently Asked Questions
What is a good churn rate for SaaS?
For SMB-focused SaaS, monthly logo churn of 3–5% is common; best-in-class products run below 2%. Enterprise and annual-contract businesses often see annual churn in the single digits. Lower is always better, and revenue churn matters even more than logo churn because it directly protects MRR.
What's the difference between logo churn and revenue churn?
Logo churn is the percentage of customers who cancel; revenue churn is the percentage of MRR lost. They can differ sharply: losing many tiny accounts produces high logo churn but low revenue churn, while losing one large account does the reverse. Track both to see the full picture.
What is negative churn?
Negative net revenue churn happens when expansion revenue from existing customers — upgrades, seat additions, cross-sells — exceeds the revenue lost to downgrades and cancellations. The result is a customer base whose revenue grows on its own, which corresponds to net revenue retention above 100% and is a hallmark of elite SaaS businesses.