---
title: "What Is Revenue Churn?"
term: "Revenue Churn"
description: "Revenue churn is the recurring revenue lost from existing customers in a period — through cancellations, downgrades, or non-renewals — usually measured as a percentage of starting ARR or MRR."
date: 2026-07-25T00:00:00.000Z
updated: 2026-07-25T00:00:00.000Z
topics: ["venture-capital"]
source: https://venturecapitaltracker.com/glossary/revenue-churn
---

# What Is Revenue Churn?

> Revenue churn is the recurring revenue lost from existing customers in a period — through cancellations, downgrades, or non-renewals — usually measured as a percentage of starting ARR or MRR.

**Revenue churn** is the share of recurring revenue you lose from existing customers in a period, before counting upsells or expansions.

### How it works

**Gross revenue churn** = revenue lost from churn and downgrades ÷ starting recurring revenue.

Start the month at $500K MRR. Cancellations and downgrades cost $25K. Gross revenue churn = 5% for that month.

**Net revenue churn** subtracts expansion revenue from the same numerator logic — or equivalently, reports net revenue retention above 100% when expansion outweighs losses. A company with 3% gross churn but strong upsell might show 105% net revenue retention.

Revenue churn differs from **logo churn**: losing one small customer vs one enterprise account hits revenue churn harder. Always segment by customer size and cohort.

Annual contracts may show churn at renewal dates, creating lumpy months — use trailing twelve-month views for board reporting.

### Why it matters

- **Founders:** Fix churn before scaling paid acquisition; high churn raises [CAC payback](/glossary/cac-payback) and burns cash.
- **Investors:** Net revenue retention above 100% is a hallmark of category leaders; sustained gross churn above single digits in SMB SaaS raises diligence questions.

### Common mistake

Reporting only logo churn when a handful of large accounts drive most ARR. Revenue churn exposes concentration risk that customer counts hide.

### Related ideas

See also [logo churn](/glossary/logo-churn), [retention curve](/glossary/retention-curve), [SaaS metrics](/glossary/saas-metrics), and [Rule of 40](/glossary/rule-of-40).

## FAQ

### What is revenue churn in simple terms?

Revenue churn measures how much recurring revenue you lost from existing accounts in a month or year — not from new sales. If you started with $1M ARR and lost $20K from cancels and downgrades, gross revenue churn might be 2% for that period.

### Why does revenue churn matter?

For founders, high revenue churn means expansion must outrun leaks to grow. For investors, gross vs net revenue churn separates fragile growth from durable compounders — especially in enterprise SaaS.


---
Source: https://venturecapitaltracker.com/glossary/revenue-churn