10% Monthly Churn Rate — How Bad Is It?
Losing 20 customers out of 200 per month is a 10% monthly churn rate, meaning your entire customer base turns over roughly every 10 months.
How to use this tool
- Enter customers at start of period, customers lost during period, mrr at start of period and mrr lost (churned revenue) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your customer churn rate and the full breakdown beneath it.
A 10% monthly churn is a critical warning sign — this calculator quantifies the revenue loss alongside customer loss so you can prioritize retention.
Frequently asked questions
- What is a good monthly churn rate?
- For SaaS, monthly churn below 2% is considered good; below 1% is excellent. Annual equivalents: 2% monthly ≈ 21% annual churn. Enterprise software tends to have lower churn (0.5–1%/mo) than SMB-focused products (2–5%/mo).
- What is the difference between customer churn and revenue churn?
- Customer churn counts the number of accounts lost. Revenue churn (MRR churn) measures the dollar value lost. Revenue churn can be negative (net negative churn) if expansion revenue from existing customers exceeds cancellations — a sign of a very healthy business.
- How does churn relate to customer lifespan?
- Average customer lifespan ≈ 1 ÷ monthly churn rate. At 10% monthly churn, average lifespan is 10 months. Use this to estimate LTV.