No one likes to talk about customers leaving. But in the world of subscription-based businesses, it can’t be ignored, and that’s where churn rate comes in. At its simplest, churn rate is the percentage of customers who stop using your product or service over a given time period. It’s a key health check, letting you know if your business is holding on to its users or if people are slipping through the cracks.
Churn rate matters because keeping an existing customer tends to be far more cost-effective than acquiring a new one. A high churn rate can suggest something isn’t quite right: your product may not meet users’ needs, onboarding is too tricky, or competitors are luring your customers away. On the other hand, a low churn rate is a healthy sign that people are finding value and sticking around.
There are a few ways to slice churn. Customer churn is about the number of users leaving; revenue churn looks at the money lost when subscribers downgrade or cancel. Understanding churn rate helps you:
To gain insight into your churn rate, use the simple formula below. Input the number of customers you had at the start of the month and how many customers you had at the end of the month.
| ( | − | ) / ( | # at the start | ) * 100 = |
Join us on 23 September for the exclusive Breakfast & Growth Session for Spotler Partners and discover the latest developments, Agentic AI and our Commerce Cloud.
Join Sport:80 COO & Spotler’s CEX Director for this thought-leadership session introducing the universal member lifecycle marketing.
Learn how to build automated email sequences triggered by customer actions, from picking the right trigger to measuring performance with Spotler.
Join our session at the Groothandel E-commerce Event. Discover how wholesalers grow with personalisation and marketing automation.
Join Spotler's session at Shopping Today. Discover how AI, personalisation and marketing automation create more relevant customer journeys.
Join Spotler's expert session at Frankwatching's AI Marketing Event 2026. Discover the future of AI and email marketing.
Discover what agentic commerce means for your online shop and how Spotler helps you turn every AI transaction into a genuine customer relationship.
Many email marketers use AI, but don’t get the most out of it. Discover how to use AI more intelligently to create better emails.
Using Spotler, Hertfordshire Zoo generated over half a million pounds in additional revenue from automated emails in the first year.
WhatsApp is replacing phone numbers with Scoped IDs. Use this checklist to check what your organisation needs to change.