Employee attrition definition
Employee attrition is a reduction in workforce size when employees leave and their roles are not immediately replaced. The departure may be voluntary or involuntary, and the work may be removed, paused, or absorbed by the remaining team.
Attrition in practice
Attrition changes both headcount and how work is distributed. If a role is not replaced, its responsibilities must be stopped, automated, outsourced, or reassigned. That makes the operational handover important even when the organization has deliberately chosen not to backfill the position.
Attrition can be voluntary, such as resignation or retirement, or involuntary, such as a redundancy. Internal movement may also create attrition within one team even when the employee remains in the organization.
Employee attrition example
A six-person operations team loses one employee during a hiring freeze. The company does not open a replacement role, so the team shrinks to five. That is attrition. Before the employee leaves, the manager decides which reports will stop, which approvals move to finance, and which recurring tasks the remaining team will own.
Attrition versus turnover
The practical distinction is what happens to the seat. If it closes or remains unfilled, the change is usually described as attrition. If recruitment begins for a replacement, it is usually employee turnover. For a deeper breakdown, read the guide to employee attrition, types, and rate.
Frequently asked questions
What causes employee attrition?
Attrition can result from resignations, retirement, restructuring, redundancies, hiring freezes, or positions that remain unfilled. The causes can be planned or unplanned, so the rate needs context before it is interpreted.
How is employee attrition calculated?
A common attrition-rate formula divides the number of employees who left during a period by the average number of employees during that period, then multiplies the result by 100. Use the same population and time period throughout the calculation.
What is the difference between attrition and turnover?
Attrition usually describes roles that disappear or remain unfilled after people leave. Turnover counts employees leaving roles that the organization generally intends to refill.