Retention, churn & expansion · Core
Churn
Also called: attrition
ELI5
Loss of customers, users or recurring revenue during a period.
Used in conversation
“Keep churn on the dashboard, but show the definition and reporting period beside it.”
Pitch context
You will see “Churn” in go-to-market plans, sales forecasts, account reviews and commercial proposals when the discussion reaches retention, churn & expansion.
Why it matters: It helps a reader interpret retention, churn & expansion without confusing the measure, decision, role or evidence being discussed.
Connected terms
- Retention rateChurn measures loss; retention measures what remains. They are complements only when scopes and denominators align.
- ChurnThe same visible label “Churn” names different concepts.
- AttritionThe search label “Attrition” can route to both entries.
Sources & evidence · 2
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- U.S. Small Business Administration — Write your business planSupporting source family · primary · checked 2026-08-16
- IFRS Foundation — IFRS GlossarySupporting source family · primary · checked 2026-08-16