Customer Attrition

Customer attrition is the process of losing customers over time. In a subscription business, every customer who cancels, fails to renew, or lapses due to a payment failure adds to your attrition. It's the same concept as customer churn, just described from the perspective of gradual, ongoing loss rather than a single-period rate.

Measuring customer attrition

The standard measure is the attrition rate: customers lost during a period divided by customers at the start, times 100. Most SaaS businesses track this monthly. You can calculate yours with our attrition rate calculator.

Causes of customer attrition in SaaS

Customer attrition splits into two categories. Voluntary attrition happens when customers actively decide to cancel: poor product fit, price sensitivity, or a competitor shipping a must-have feature. Involuntary attrition happens when payments fail and the subscription lapses without the customer intending it.

Involuntary attrition typically accounts for 20 to 40% of total customer loss. It's the faster fix because the customer still wants your product. We've seen automated dunning and smart payment retries recover the majority of these failed charges across Stripe and Paddle billing setups.

Attrition vs churn

The terms are often used interchangeably. In SaaS, "churn" is more common. "Attrition" tends to appear in broader business and HR discussions. For a full comparison, see attrition vs churn.