Churn Rate
The percentage of customers or revenue lost within a given period due to cancellations or non-renewals.
Churn rate measures the rate at which a SaaS company loses customers or revenue over a given period, typically expressed as a monthly or annual percentage. It is one of the most critical metrics for any subscription business because it determines the long-term sustainability of the revenue base and the efficiency of growth investment.
There are two primary types of churn: customer (or logo) churn, which counts the percentage of customers who cancel, and revenue (or MRR/ARR) churn, which measures the percentage of recurring revenue lost. Revenue churn is generally more meaningful because it accounts for the relative size of departing customers.
Churn Rate (Monthly) = MRR Lost from Cancellations ÷ Beginning MRR
For example, if a company begins the month with $1M MRR and loses $15,000 from cancellations, its monthly revenue churn is 1.5%, or approximately 18% annualized.
Churn benchmarks vary significantly by market segment. Enterprise SaaS companies targeting Fortune 500 customers may achieve annual churn below 5%. Mid-market SaaS companies typically target 5–10% annual churn. SMB-focused SaaS products often see 15–25% annual churn due to higher business failure rates among small businesses.
High churn is the most dangerous disease for a SaaS business — it creates a 'leaky bucket' dynamic where the company must acquire more and more new customers just to maintain the same revenue level. Reducing churn by even 1–2 percentage points per year can dramatically improve LTV/CAC ratios and company valuation.
Churn is monitored via cohort analysis — tracking groups of customers acquired in the same period over time — to understand retention patterns by acquisition channel, pricing tier, company size, and product usage intensity.
FAQs
What is the difference between gross and net revenue retention?
Gross Revenue Retention (GRR) measures the percentage of starting MRR retained from existing customers, excluding any expansion — it can only be 0–100%. Net Revenue Retention (NRR) includes expansion revenue and can exceed 100%, meaning upsells more than offset churn.
What is involuntary churn and how do you reduce it?
Involuntary churn occurs when customers don't intend to cancel but payment fails — typically due to expired credit cards, insufficient funds, or fraud blocks. It often accounts for 20–40% of total churn in B2C SaaS. Reducing it requires automated dunning emails, card updater services, and retry logic.
How does churn rate affect company valuation?
Churn rate is a primary input in LTV calculations and SaaS valuation multiples. A company with 5% annual churn commands significantly higher revenue multiples than one with 20% annual churn at the same ARR, because lower churn implies a more durable, predictable revenue stream.
Related Terms
Net Revenue Retention
The percentage of recurring revenue retained from existing customers including expansions, showing whether a customer base grows on its own.
Annual Recurring Revenue
The annualized value of all active recurring subscription contracts, the primary revenue metric for SaaS businesses.
Customer Lifetime Value
The total net revenue a business expects to earn from a customer over the entire duration of their relationship.
SaaS Quick Ratio
A metric measuring SaaS revenue growth quality by comparing new and expansion MRR gained to churned and contracted MRR lost.
