TL;DR: Churn rate is the percentage of customers, or revenue, that a company loses over a given period. It is a central measure of retention: low churn signals that customers stay and the business compounds, while high churn means growth leaks away.
Churn rate measures loss over a period, usually monthly or annually. Customer churn is the share of customers who cancel or do not renew. Revenue churn is the share of recurring revenue lost. The two can differ sharply: losing a few small accounts is very different from losing one large one, which is why revenue churn often tells the clearer story.
Gross churn counts only the revenue lost. Net churn nets that loss against expansion revenue from existing customers, such as upgrades and additional seats. When expansion outpaces losses, net churn can be negative, meaning the existing customer base grows in value even before any new sales. That dynamic is captured in net revenue retention.
For a venture debt provider, retention is one of the most important signals of revenue quality. A company with low churn has a predictable, durable revenue base, which supports its ability to service and repay a facility. High churn undermines that predictability no matter how fast new sales are growing.
What is a good churn rate? It varies by segment. Strong recurring-revenue businesses serving larger customers often run low single-digit annual churn, while products serving very small customers tend to see higher churn.
Why track revenue churn as well as customer churn? Because not all customers are equal. Revenue churn reflects the financial impact of losses, which customer churn alone can hide.
Related terms: Net Revenue Retention (NRR) · Unit Economics · Annual Recurring Revenue · Monthly Recurring Revenue
