Voluntary attrition is employee-initiated, resignation for a new job, retirement, relocation, personal reasons. Involuntary attrition is employer-initiated, termination for performance or conduct, layoffs, restructuring. Splitting the two changes what a single blended attrition rate actually tells you.

Why the split matters

A spike in overall attrition could mean two very different things: employees genuinely leaving on their own, which signals a pay, culture or engagement problem worth fixing, or a deliberate restructuring and layoff decision, which reflects business strategy rather than an unwanted talent loss. Blending both into one number masks which story is actually true, and HR and finance stakeholders need the split to diagnose the right root cause and target the right response, a retention program for voluntary attrition, workforce planning for involuntary. As a rough directional pattern, voluntary departures typically make up the larger share of total attrition in most periods, employer-initiated exits tend to be the smaller, more episodic component, though the exact split shifts considerably during active restructuring or downturns.

Regrettable vs non-regrettable attrition

A second split cuts across the first. Regrettable attrition is the loss of people the company wanted to keep: strong performers, holders of scarce skills, or a high-potential employee on a succession slate. Non-regrettable attrition covers exits the business can absorb or even welcomes, such as a consistently low performer resigning. The label is a judgement made by the manager and HR, usually against the last rating and how hard the role is to refill, so agree the rules before you report the number. If 40 people leave in a year and 12 were people you would have fought to keep, the regrettable share is 30%, and those 12 are the exits a stay interview programme should be trying to prevent.

Frequently asked questions

How is each rate calculated?

Same formula as overall attrition rate, voluntary separations divided by average headcount for voluntary attrition, involuntary separations divided by average headcount for involuntary, and the two sum to the total.

Does a layoff count as involuntary attrition?

Yes, any employer-initiated separation, layoffs included, falls under involuntary attrition rather than voluntary.

Which split matters more to track?

Voluntary attrition is usually the more actionable signal for engagement and retention efforts, since it reflects choices the company can actually influence.

See the full attrition rate and retention rate definitions.