Customer attrition is the most general way to describe customers leaving. Unlike a monthly churn rate, attrition is usually expressed as a total or annual figure and aggregates every reason a customer is no longer with you. It is the term you will see most often in finance reports, M&A diligence, and category research studies.
What attrition includes
- Voluntary cancellations — the customer chose to leave.
- Non-renewals — annual contract subscribers who lapsed at end of term.
- Involuntary churn — failed payments that ultimately ended the subscription.
- Account closures — customer closed entirely (death, moved out of country, etc.).
If you want to know "how many customers walked out the door this year, regardless of why," attrition is the right metric. If you want to know "why and what to do about it," you need to split attrition into its causes.
Why finance teams prefer attrition
Attrition lines up with how board reporting and valuation work. Investors model annual cohort decay; CFOs forecast bad-debt and revenue forecasts off the same horizon. Saying "monthly churn is 5%" means little to a finance committee — saying "customer attrition is 46% per year" is the same fact in their preferred dialect.
Reducing customer attrition
Because attrition aggregates every departure cause, "reducing attrition" is the wrong frame for an ops team. Split it into voluntary and involuntary first, then tackle each:
- Involuntary: dunning management, smart retries, card updater services.
- Voluntary: better cancel flow, flexibility (pause, skip, swap), product fit, onboarding.
- Non-renewal: pre-renewal outreach, expansion incentives, multi-year contracts with discounts.
See also reduce customer attrition for a focused playbook.