Attrition

Attrition is the gradual reduction in a workforce when employees leave and are not replaced. It measures staff loss over time and helps organizations assess stability.

In plain English, attrition refers to people leaving a job through resignation, retirement, or other exits where the employer does not hire replacements immediately. It differs from churn that implies active replacement and from layoffs that are employer initiated.

What is Attrition

Attrition is a passive form of headcount change. HR teams track attrition rates to understand natural workforce decline and to align hiring and budget plans. It is commonly expressed as a percentage of total headcount over a period.

How does it work

Organizations calculate attrition by dividing the number of separations by average headcount for the period. HR uses the result to guide workforce planning, retention initiatives, and cost forecasting. High attrition can signal engagement issues while low attrition may indicate retention success.

Practical usage and examples

Where and why the term is used:

• Recruitment forecasting when hiring freeze is not planned
• Workforce planning to predict vacancies from retirements
• Compliance reporting for headcount trends

Realistic HR scenarios

Exit interviews reveal causes of voluntary attrition; payroll adjusts for fewer hires after a round of resignations; talent acquisition targets roles with high attrition.

Related HR concepts include turnover, retention, separation, voluntary turnover and headcount planning. These terms are often used together when analysing workforce health.