# Churn

> The rate at which users or customers stop using a product or cancel over a given period — the inverse of retention.

- Category: Growth & Metrics
- Canonical: https://www.themasterly.com/glossary/churn

Churn is the percentage of users or revenue lost in a period — the leak in the bucket. It comes in flavors: user churn (people leaving), revenue churn (dollars lost), and voluntary versus involuntary (failed payments). Each points to a different fix, so measuring the right one matters.

High churn quietly caps growth: if new users pour out as fast as they come in, acquisition spend is wasted. Because churn is the mirror image of [retention](https://www.themasterly.com/glossary/retention), the levers are the same — better [onboarding](https://www.themasterly.com/glossary/onboarding), faster [activation](https://www.themasterly.com/glossary/activation), and delivering value people don't want to give up.

## In practice

A startup panics at 6% monthly churn and starts planning win-back campaigns. Segmenting first changes the plan: 40% of losses are involuntary — failed card payments, not decisions. Dunning emails, card-retry logic, and a grace period claw back most of that slice within a quarter, the cheapest retention work the team ever shipped. The remaining voluntary churn concentrates in accounts that never activated a second user — a design problem, not a billing one.

## Related terms

- [Retention](https://www.themasterly.com/glossary/retention)
- [Activation](https://www.themasterly.com/glossary/activation)
- [Onboarding](https://www.themasterly.com/glossary/onboarding)
- [North Star Metric](https://www.themasterly.com/glossary/north-star-metric)

## FAQ

**What's the difference between voluntary and involuntary churn?**

Voluntary churn is a decision — the user cancels. Involuntary is friction — payment failures, expired cards. They need different fixes: product value for the first, billing mechanics for the second. Always split them before reacting.

**What churn rate is acceptable?**

Depends on segment: SMB SaaS often lives with 3–7% monthly; enterprise expects low single digits annually. More useful than the absolute number is the trend and whether revenue expansion outpaces the leak.

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