Turnover vs attrition
Turnover focuses on replacement: a role is vacated and filled again, so headcount stays roughly level while the people change. Attrition, in its stricter sense, focuses on reduction: people leave and the roles are not refilled, so the workforce shrinks. A retail chain replacing store staff every few months has high turnover. A company that freezes hiring and lets headcount fall through resignations is managing by attrition. Many Indian companies use the two words interchangeably, so state the definition wherever you report the number.
The cost of turnover
Every replacement costs more than the recruitment fee. There is the vacancy period, when work is delayed or covered by overtime. There is the hiring effort, the onboarding and training time, and the months a new person takes to reach full productivity. In customer-facing roles, turnover also shows in service quality, because customers meet new faces who do not yet know the products. Estimating these costs for one role, even roughly, helps leadership see why reducing turnover deserves money and attention.
- Recruitment: job posts, agency fees and interview time
- Vacancy: lost output and overtime for the team
- Onboarding: induction, training and supervisor time
- Ramp-up: lower productivity in the first months
Reading turnover numbers correctly
Split turnover into voluntary and involuntary, and into functional and dysfunctional, meaning whether the company is better or worse off after the exit. Look at exits within the first 90 days separately, since they usually reflect hiring and onboarding. Compare months and locations of similar size. Monthly rates look small, so annualize them before comparing with yearly figures. The formulas, with worked examples, are in HR metrics.
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What is the difference between turnover and attrition?
Turnover measures how often employees leave and are replaced, so it describes churn in roles that are refilled. Attrition, in the stricter sense, describes employees leaving when the roles are not refilled, which reduces the workforce. Many companies use the words interchangeably and report one exit rate, so define the term in your metrics and apply it consistently.
How do you calculate employee turnover rate?
Divide the number of employees who left during the period by the average number of employees in that period, then multiply by 100. The average is often the opening plus closing headcount divided by two. For example, 18 leavers with an average headcount of 300 gives 18 / 300 x 100 = 6 percent for the period.
What is voluntary and involuntary turnover?
Voluntary turnover is when employees choose to leave, for example by resigning for another job, higher studies or personal reasons. Involuntary turnover is when the employer ends the employment, for poor performance, misconduct, redundancy or the end of a contract. Track the two separately, because they have different causes and need different actions.