Retention vs churn: simple definitions
Churn is the share of customers who leave in a period. Retention is the share who stay. If monthly churn is 5%, monthly retention is 95%.
Customer churn vs revenue churn
- Customer churn: % of customers who cancel.
- Revenue churn: % of recurring revenue lost (can differ if big accounts churn).
- Net revenue retention (NRR): revenue retention after expansion (upsells, seat growth).
Why churn is so powerful
Small improvements compound. If you reduce churn, you increase LTV, improve payback, and unlock more acquisition spend without breaking unit economics.
How to estimate churn when you’re early
- If you have subscriptions: churn = cancellations / starting customers (per month).
- If you have cohorts: measure churn by cohort month to see stabilization.
- If you don’t have enough data: start conservative and refine monthly.
Common churn traps
- Ignoring involuntary churn (failed payments). Fix with dunning and retries.
- Not separating early churn (activation issues) from late churn (value issues).
- Counting paused accounts as retained without clear rules.
Levers to improve retention
- Time-to-value: shorten onboarding; reduce first-week friction.
- Habit loops: features that bring users back weekly.
- Success metrics: help users see progress (dashboards, milestones).
- Pricing/packaging: align price with perceived value and usage.
Once you have churn, you can compute LTV with the CAC & LTV tool and sanity-check payback with Payback.