Churn Rate & Retention Calculator
Calculate monthly/annual customer churn rate, retention rate, and average customer lifetime.
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How to use this calculator
Churn rate measures the percentage of customers who cancel or leave in a given period. Retention rate = 100% − Churn rate. Average customer lifetime = 1 / Churn rate (in periods). Annual churn compounds monthly rates.
- 1
Enter the number of customers you had at the start of the period and how many were lost.
- 2
Select whether your data covers a monthly, quarterly, or annual period.
- 3
Add your MRR to see the dollar impact of churn and estimate customer LTV based on current revenue.
Frequently asked questions
What is a good monthly churn rate?
For SaaS businesses, a monthly churn rate below 2% is considered acceptable, and below 1% is excellent. At 5% monthly churn, your annualized churn exceeds 46% — meaning you lose nearly half your customer base each year. Even a 1% reduction in monthly churn can dramatically improve lifetime value.
How does monthly churn compound to annual churn?
Annual churn is not simply monthly churn × 12. It compounds: Annual Churn = 1 − (1 − Monthly Churn)^12. A 5% monthly churn results in a ~46% annual churn, not 60%. This calculator handles the compounding automatically.
What is the difference between customer churn and revenue churn?
Customer churn counts the number of customers lost. Revenue churn (or MRR churn) counts the revenue lost. If you lose mostly small accounts, customer churn will be higher than revenue churn. If large accounts leave, revenue churn will exceed customer churn. Track both for a complete picture.
Churn Rate & Retention Calculator
Understanding Churn Rate and Why It Matters
Churn rate is the percentage of customers who stop doing business with you in a given period. For subscription businesses — SaaS, streaming, membership, or any recurring-revenue model — churn is the most important metric to track and minimize. High churn destroys the economics of acquisition: if you spend $200 to acquire a customer who churns after 3 months at $50/month, you have lost money. Reducing churn by even 0.5% per month can double or triple average customer lifetime value over a 3-year horizon.
Strategies to Reduce Churn and Improve Retention
The most effective churn-reduction strategies address root causes: poor onboarding, lack of product value realization, competitive alternatives, or pricing dissatisfaction. Invest in customer success outreach at key lifecycle moments (day 7, day 30, renewal), identify at-risk customers through product usage signals, and survey churned customers to understand why they left. Even a structured 30-day onboarding sequence can reduce early churn by 20–40%. Every percentage point of retention improvement compounds into significantly higher LTV and lower effective CAC.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →