Attrition Rate

Attrition rate measures how many customers a business loses — whether through cancellations, non-renewals, or simply stopping purchases — relative to its total customer base. It is calculated as: (customers lost during period ÷ customers at start of period) × 100. For subscription businesses like gyms or SaaS companies, attrition is one of the most closely watched metrics because even small improvements compound significantly over time.

Why It Matters

A high attrition rate is expensive. Acquiring a new customer typically costs five to seven times more than retaining an existing one. If your attrition rate is 5% per month, you are replacing your entire customer base roughly every 20 months just to stay flat. Reducing attrition by even 1–2 percentage points can meaningfully increase revenue without spending more on acquisition.

Attrition vs. Churn

The terms are often used interchangeably, but some businesses distinguish between voluntary attrition (a customer actively cancels) and involuntary attrition (a payment fails and the customer is automatically removed). Understanding which type dominates your numbers points to different fixes — better retention campaigns for voluntary, and better dunning workflows for involuntary.

How to Reduce It

The most effective attrition-reduction strategies combine early warning signals (behavioral data that predicts who is about to leave) with proactive outreach — automated SMS or email campaigns triggered when engagement drops. Fitness studios, for example, often set a trigger when a member has not checked in for 14 days, sending a personalized re-engagement message before they formally cancel.