Churn Rate Calculator

Calculate customer churn rate, retention rate and average customer lifetime for a period.

How do you calculate churn rate?

Churn rate is the percentage of customers lost during a period: customers lost ÷ customers at the start × 100. Losing 50 of 1,000 customers in a month is a 5 % monthly churn rate.

What you get

Churn and retention rate for the period
Customers at the end, including new customers
Average customer lifetime (1 ÷ churn rate)
Lost recurring revenue, if you enter MRR

Count only customers who were there at the start, so new sign-ups during the period do not hide churn. Good SaaS businesses often keep monthly churn under 2–3 %.

Frequently asked questions

Monthly or yearly churn?

Use the period your data covers; 5 % monthly is about 46 % yearly.

What is a good churn rate?

It depends on the business; for B2B SaaS, under 1–2 % monthly is strong.

What is revenue churn?

The share of recurring revenue lost, which can differ from customer churn.