Attrition is the gradual loss of employees through resignations, retirements and other departures that the employer does not replace right away. It is how a workforce shrinks without layoffs.
| Attrition | Turnover | |
|---|---|---|
| What it counts | Departures not replaced (the workforce shrinks) | All departures, usually replaced |
| Typical use | Headcount planning, cost reduction without layoffs | Retention problems, hiring load |
| Formula (common) | Departures not replaced / average headcount | All departures / average headcount |
Because definitions vary between companies, write yours down. See turnover rate and the employee turnover calculator.
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A call center needs to cut 20 agent positions over a year and chooses attrition instead of layoffs. Historically, about 3 agents leave each month. It stops all external hiring for agent seats and lets departures reduce the count.
By month 7 the center is at 100 agents, but the losses are uneven: the billing disputes queue lost 5 of its 14 agents, while the general queue lost 15 of 106. Average wait time for billing calls doubled. The center moves 3 general agents with billing experience into that queue with a pay step and reopens hiring for the language queue only. Attrition met the cost goal, but only after someone looked at which seats were emptying, not just the total.
A headcount report taken from the same system that holds the schedule makes the split by shift and location much easier, since every employee is already tied to a location and role.
Attrition can be predicted roughly from your own history. Look at departures by role and month for the last two or three years: most businesses have a pattern, such as more departures after the holiday season or at the start of the school year. Plan hiring and training to arrive before the dip, not after it.
For roles where losing one person creates a big gap, such as the only certified technician on a shift, track a bench of people who could step in. Attrition in a role with no bench is a risk even if the total attrition rate looks fine.
A restaurant group sees that 30% of its yearly server departures happen in late August, when students return to school. Each year it scrambles to hire in September.
It starts recruiting in July, offers fall schedules that fit around classes, and asks departing students whether they want weekend shifts. The next year, September vacancies fall from 18 to 7, and 5 students stay on weekends.
Turnover counts all departures, usually replaced. Attrition usually describes departures that are not replaced, so the workforce shrinks.
A common method is departures not replaced in a period divided by average headcount for the period, times 100. Use the same method every time.
It can be a deliberate, low-disruption way to shrink, or a warning sign if valuable people are leaving. Look at who is leaving, not just how many.
Retirements, resignations, relocations and career changes. High attrition in one team often points to scheduling, pay or management issues there.
It depends on the industry and role. Compare your own rate over time and by role, and watch for roles where losses are not being covered.
Sometimes, if the reduction is gradual and you track which roles are emptying, so coverage does not fail in critical areas.
Announcements by location, department or role, and a company feed with surveys and read confirmations, so frontline staff see the same news.