churn rate
noun [ C ]
ukus COMMERCE, MARKETING
the percentage of customers who stop buying the products or services of a particular company, calculated for a particular period of time:
Its churn rate is 17% against an industry average of 25%.
HR
the percentage of people who leave their job, calculated for a particular period of time:
The firm reports a staff churn rate of just 4% against a sector average of around 25%.