Employee turnover
Also called:attrition, employee attrition, staff turnover, labor turnover
Turnover and retention describe the same departures from opposite ends. The number only means something next to a same-industry benchmark — a flat 'healthy %' target ignores how much normal rates vary by sector and role.
What the number actually counts
Employee turnover is the share of the workforce that left over a set period, expressed as a rate: how many people left, relative to how many you had.
Turnover rate = (separations during the period ÷ average headcount) × 100“Separations” means anyone who left for any reason: resignation, dismissal, retirement, or a fixed-term contract ending. Average headcount, rather than the count at either end of the period, keeps the number honest when the team was also growing or shrinking while people left. The result is usually annualized, even when the underlying count is monthly, so a bad month doesn’t get compared with a good year.
It’s also called attrition, or employee attrition. HR uses both words for the exact same calculation, and this entry covers both.
Voluntary vs. involuntary, and why it matters
The formula treats every departure the same, but the reason someone left changes what the number is telling you. Voluntary turnover (a resignation) usually points at pay, management, or fit. Involuntary turnover (a dismissal, or a fixed-term contract ending) usually points at a hiring decision made months earlier. A rate reported without that split is a number waiting to be misread: the same total can hide a healthy pruning of underperformers or a culture problem driving good people out the door.
Turnover and first-year retention describe the same movement from opposite ends: a business keeping 88% of its first-year hires is running roughly 12% turnover in that cohort. The two figures rarely match exactly, since retention tracks a fixed cohort over time while turnover recalculates against a moving headcount, but they move together, and a team that only watches one is missing half the picture.
Where one number breaks
The instinct is to compare a company’s rate against “the industry standard.” Mercer’s 2025 US Turnover Survey puts average voluntary turnover at 13.0% for 2024–2025, but the same survey shows 8.2% in insurance and reinsurance against 26.7% in retail and wholesale. A retailer running “only” 20% isn’t beating a general benchmark; it’s still below what’s normal in its own sector.
This is coming from a company that sells hiring software rather than retention or engagement tools, so weigh what follows with that in mind: a single “healthy turnover %” target is close to meaningless without a same-industry, same-role comparison, and plenty of vendors publish one anyway because a flat number is easier to sell than an honest range.
The stakes are why the number is worth getting right in the first place. Gallup estimated in 2019 that voluntary turnover costs US businesses roughly $1 trillion a year, and that 52% of people who quit say their manager or employer could have prevented it. Turnover on its own is an outcome. Investigating why it moved is the actual diagnosis.
How to measure it without fooling yourself
Four habits keep the number honest: report voluntary and involuntary separately instead of one blended figure, use average headcount for the period rather than a single-day count, annualize consistently so one bad quarter doesn’t distort a full year, and never count an internal transfer or promotion as a separation, since that’s headcount movement, not turnover. Segment by tenure and department before drawing a conclusion. A 15% company-wide rate can be 4% in one team and 40% in another, and the average tells you about neither.
Where Join fits
Join doesn't move your turnover rate. That's a management and engagement question. What it moves is the cost of each open seat: multiposting to 10+ organic boards cuts the time to refill a role, so replacing someone costs less, whatever your turnover rate is.
