Churn Rate Calculator

Monthly & Annual Churn · Net Revenue Retention · Customer Lifetime

Monthly Churn Rate
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Enter your customer or revenue data
Monthly Churn
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Annual Churn
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Net Revenue Retention
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Customer Lifetime
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Revenue Churn
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Monthly Retention
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Customer Decay Curve (24 Months)

Churn = Lost ÷ Start
Annual = 1-(1-m)^12
NRR = (Start+Exp-Con-Churn) ÷ Start
Lifetime = 1 ÷ Churn%
Current
Your Churn Rate
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Lifetime: —
Target
−2 percentage points
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Lifetime: —
Best Case
50% churn reduction
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Lifetime: —

Sensitivity Matrix — Churn Rate by Customers Lost × Starting Customers

Heat map: green = lower churn, red = higher churn

Churn Reduction Impact on Customer Lifetime

Monthly Churn Annual Churn Customer Lifetime Change vs Current

Monthly Churn Rate Benchmarks by Segment

Retention Rate by Category

Industry Churn & Retention Benchmarks

Segment Typical Monthly Churn Annual Churn NRR Benchmark Avg Customer Lifetime
Consumer SaaS (B2C)3–8%30–65%80–95%12–33 mo
SMB SaaS1.5–4%16–40%90–100%25–67 mo
Mid-Market SaaS0.75–2%9–22%100–110%50–133 mo
Enterprise SaaS0.25–1%3–11%110–130%100–400 mo
Usage-Based SaaS1–3%11–30%100–120%33–100 mo
E-commerce Subscription4–10%40–72%80–90%10–25 mo
Your Company — — — —

How to Use This Calculator

1

Enter Subscriber Data

Input the number of customers at the start of the period and the number who cancelled or did not renew.

2

Set Time Period

Select the measurement period — monthly, quarterly, or annually.

3

Analyze Churn

Review your churn rate, retention rate, customer half-life, and projected revenue impact over 12 months.

Formula & Methodology

Customer Churn Rate

Churn Rate = Customers Lost / Customers at Start of Period

The percentage of customers who leave during a given time period.

Revenue Churn Rate

Revenue Churn = MRR Lost / MRR at Start of Period

Accounts for the dollar value of lost customers, not just count.

Customer Half-Life

Half-Life = ln(0.5) / ln(1 − Monthly Churn Rate)

The number of months until half your customer base has churned.

About this calculation · Accuracy & Methodology

Key Terms

Customer Churn
The rate at which customers cancel or fail to renew their subscription.
Revenue Churn
MRR or ARR lost from cancellations, downgrades, or contractions.
Net Revenue Churn
Revenue churn offset by expansion revenue (upgrades, cross-sells). Can be negative if expansion exceeds churn.
Retention Rate
1 minus churn rate — the percentage of customers retained over a period.
Cohort Retention
Tracking retention for a specific group of customers acquired at the same time.

Real-World Examples

Example 1

SaaS SMB Product

Start: 2,400 customers, Lost: 108 in one month

Monthly churn: 4.5%. Annual churn: ~42%. Half-life: 15 months.

Example 2

Enterprise SaaS

Start: 340 customers, Lost: 5 in one quarter

Quarterly churn: 1.47%. Annual churn: ~5.8%. Half-life: 47 months.

Churn Rate Benchmarks (Monthly)

SegmentGoodAveragePoor
Enterprise SaaS< 0.5%0.5-1.0%> 1.5%
Mid-Market SaaS< 1.0%1.0-2.0%> 3.0%
SMB SaaS< 3.0%3.0-5.0%> 7.0%
Consumer Subscription< 4.0%4.0-8.0%> 10.0%
Mobile App< 5.0%5.0-10.0%> 15.0%

Understanding and Reducing Churn

The Compounding Cost of Churn

Churn compounds like interest in reverse. At 5% monthly churn, you lose 46% of customers annually. To merely maintain your customer count, you need to acquire new customers equal to nearly half your base every year — before you can even begin to grow. Reducing churn from 5% to 3% monthly improves annual retention from 54% to 69%, dramatically reducing the acquisition burden.

Identifying Churn Signals

Most churned customers show warning signs 30-60 days before cancelling: declining login frequency, reduced feature usage, support tickets increasing, and billing failures. Build a health score that tracks these signals and trigger proactive outreach when the score drops. Companies with proactive churn prevention save 20-30% of at-risk customers.