Calculating it
Start a month with 1,000 customers, lose 50, and monthly churn is 5%. That sounds small, but it compounds to losing about 46% of customers in a year (1 − 0.95¹²). Distinguish customer churn from revenue churn; with upsells, net revenue retention can top 100%. Average customer lifetime is roughly 1 ÷ churn, making churn central to customer lifetime value (LTV).
Why it matters and how to reduce it
Reichheld and Sasser found that boosting retention by 5 points could raise profits 25% to 85% depending on the industry, since acquiring customers costs far more than keeping them. Tactics include better onboarding, flagging users whose activity drops, annual plans, and exit surveys. Churn is critical in the subscription economy and freemium models and covers the post-purchase end of the funnel.
FAQ
- What's a good churn rate?
- It varies; B2B SaaS often targets 1–2% monthly or less, while consumer apps run much higher.
- Why not make canceling hard?
- It erodes trust, and the FTC and other regulators target such dark patterns.
Sources reviewed: 2026-10-26
References
- Reichheld, F. F., & Sasser, W. E. (1990). Zero defections: Quality comes to services. Harvard Business Review, 68(5), 105–111.
- Gupta, S., Lehmann, D. R., & Stuart, J. A. (2004). Valuing customers. Journal of Marketing Research, 41(1), 7–18.