Metrics & Performance
Churn
Last updated
Quick Answer
The rate at which customers cancel or fail to renew their subscriptions over a given period, expressed as a percentage of total customers or revenue.
Churn measures how much of your customer base or revenue you lose in a given period. Customer churn (or logo churn) tracks the percentage of customers who cancel, while revenue churn (or gross revenue churn) measures the percentage of recurring revenue lost to cancellations and downgrades — before accounting for expansion revenue from existing customers.
Churn is the single most important metric for SaaS businesses because it determines whether growth is compounding or eroding. High churn means you're constantly refilling a leaky bucket — spending on acquisition just to replace lost customers. Low churn means revenue is sticky and compounds over time.
In Practice
A SaaS company starts the month with 100 customers at $100/month each ($10,000 MRR). Ten customers cancel during the month. Customer churn = 10%. Revenue churn = 10% ($1,000 lost). If 5 remaining customers upgrade, net revenue retention could still be positive.
Why It Matters
Investors scrutinize churn more than almost any other SaaS metric. High churn signals a product-market fit problem and makes the business economically unsustainable — CAC payback never comes if customers leave before you recoup acquisition costs. Benchmark: best-in-class SaaS companies have annual gross churn below 5%.
Further Reading
How to Calculate and Improve Net Revenue Retention
NRR is the metric VCs care about most. How to calculate it, what good looks like, and proven strategies to push NRR above 120%.
LTV: What Lifetime Value Means in Venture Capital
LTV (Lifetime Value) measures the total revenue a business expects to earn from a single customer over the entire relationship. Here's what it means, how to calculate it correctly, and why the LTV:CAC ratio is the most important unit economics benchmark in SaaS.
50+ Venture Capital Interview Questions by Role (With Sample Answers)
Preparing for a VC interview? Here are 50+ real questions organized by role — Analyst through GP — with sample answer frameworks from people who've been on both sides of the table.
What Happens at a Startup Board Meeting: Agenda, Dynamics, and Preparation
Board meetings are where a startup's most consequential decisions get made — or avoided. Here's what actually happens in the room, who attends, and how to run one well.
How to Calculate LTV: Customer Lifetime Value Formula Explained
LTV tells you how much revenue a customer generates over their entire relationship with your company. Here's the formula, a worked example, and what benchmarks VCs use.
ARR: What Annual Recurring Revenue Means in Venture Capital
ARR (Annual Recurring Revenue) is the single most-watched metric in SaaS venture capital. Here's exactly what it means, how it's calculated, what benchmarks matter, and why VCs obsess over it.
Comparisons
Frequently Asked Questions
What is Churn in venture capital?
Churn measures how much of your customer base or revenue you lose in a given period. Customer churn (or logo churn) tracks the percentage of customers who cancel, while revenue churn (or gross revenue churn) measures the percentage of recurring revenue lost to cancellations and downgrades — before...
Why is Churn important for startups?
Understanding Churn is critical for founders navigating the fundraising process. It directly impacts deal terms, valuation, and the relationship between founders and investors.
What category does Churn fall under in VC?
Churn falls under the metrics category in venture capital. This area covers concepts related to the quantitative measures used to evaluate fund and company performance.
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