Churn is the quiet killer of SaaS because it compounds. At 2 percent monthly churn you lose about a fifth of your customers a year. At 5 percent you lose nearly half. Every point of churn raises how many new customers you need just to stand still, which is why retention beats acquisition once you are at any scale.
The free churn rate calculator works out both customer and revenue churn and shows what it costs you.
For B2B SaaS, monthly revenue churn under 1 percent is strong and annual logo churn under 10 percent is healthy. Self-serve and SMB products churn faster by nature, often 3 to 5 percent monthly, while enterprise should be far lower given the contract size and switching cost.
The number that should worry you is net churn above zero, where lost revenue outpaces expansion. The opposite, negative net churn, means expansion beats losses and your base grows on its own. That is the same idea as net revenue retention above 100 percent, just framed from the loss side.
Most churn is decided in the first 30 days. Customers who reach real value early stay. A weak onboarding leaks customers before they ever see the point.
Declining logins and feature use predict churn weeks ahead. Catching at-risk accounts early gives success a chance to step in before renewal.
A lot of churn is bad-fit customers who were never going to stay. Tighter targeting at the top of the funnel cuts churn at the bottom.
Churn rate is the share of your customers or revenue that leaves over a set period. If you start a month with 500 customers and lose 10, that is a 2 percent monthly churn rate. It is the clearest measure of how leaky your business is and how hard retention has to work to keep you growing.
Divide the number lost during the period by the number you had at the start, then multiply by 100. For revenue churn, use recurring revenue lost over starting recurring revenue instead of customer counts. Revenue churn is usually the more useful figure because it weights large accounts more heavily than small ones.
For B2B SaaS, monthly revenue churn under 1 percent is strong and annual logo churn under 10 percent is healthy. Self-serve and SMB products run higher, often 3 to 5 percent monthly, which is normal for the model. Enterprise should be much lower given large contracts and high switching costs.
Customer churn counts the logos you lose. Revenue churn counts the dollars. They diverge when the accounts you lose are bigger or smaller than average. Revenue churn is the more honest measure because losing one major account can hurt more than losing ten small ones and customer churn alone would hide that.
Negative net churn is when expansion revenue from existing customers more than replaces the revenue lost to cancellations and downgrades. It means your base grows even with no new customers, which is the same thing as net revenue retention above 100 percent. It is the strongest position a SaaS can be in, because growth no longer depends on constantly refilling losses.
High churn is usually a fit and onboarding problem, not a product one. Book a 30-minute audit and we will find where the bucket leaks. No sales sequence.
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