Employee Turnover Rate
Also known as Turnover Rate, Staff Turnover
Employee turnover rate is the percentage of employees who leave an organisation over a set period, divided by the average headcount for that period. It is the headline retention metric most HR teams report to their board, and it covers both voluntary resignations and involuntary exits.
Formula
Turnover Rate (%) = (Number of separations during the period ÷ Average headcount during the period) × 100Average headcount is normally (starting headcount + ending headcount) ÷ 2. For fast-growing teams, use a monthly average instead — a single start-and-end average will understate turnover when headcount moves quickly.
Worked example
- Scenario
- A company starts the year with 480 employees and ends with 520. During the year, 84 people leave.
- Calculation
- Average headcount = (480 + 520) ÷ 2 = 500. Turnover rate = (84 ÷ 500) × 100
- Result
- 16.8% annual turnover
What good looks like
Across all industries, annual turnover commonly sits in the 12–20% range. It runs far higher in retail, hospitality and contact centres (often 40–60%) and lower in regulated or highly specialised sectors. The number only means something against your own sector and your own trend line — a 25% rate is alarming in pharma and unremarkable in quick-service retail.
Why employee turnover rate matters
Turnover is the most expensive people problem most organisations have, and it is the one that compounds quietest. Every exit takes institutional knowledge, loads the remaining team, and restarts a hiring cycle that costs a meaningful share of the role's salary. Tracked as a single annual figure it is a scorecard; tracked by team, manager, tenure band and reason it becomes a diagnosis.
How to improve it
- 1Segment before you act — total turnover almost always hides one or two teams driving most of the loss.
- 2Split voluntary from involuntary, then separate regretted from non-regretted. Improving the headline number by keeping low performers is not a win.
- 3Look at the first 12 months separately. New-hire attrition is a hiring and onboarding problem, not a retention problem.
- 4Correlate exits with engagement scores and manager changes rather than treating exit interviews as the only evidence.
- 5Act on tenure cliffs. Most organisations have a predictable spike at 12, 24 or 36 months that maps to vesting, promotion cycles or role stagnation.
Common mistakes
- Mixing voluntary and involuntary exits into one number, which makes a restructuring look like a retention crisis.
- Using ending headcount instead of average headcount — this understates turnover in a growing company and overstates it in a shrinking one.
- Comparing your rate against a cross-industry average rather than your own sector and geography.
- Reporting annually. By the time an annual figure moves, the causes are a year old.
- Counting fixed-term contract completions as turnover without flagging them separately.
Frequently asked questions
What is a good employee turnover rate?
There is no universal target. Most industries sit between 12% and 20% annually, but retail and hospitality routinely run above 40% without it signalling a problem. The useful question is whether your rate is rising, and whether the people leaving are the ones you wanted to keep.
What is the difference between turnover rate and attrition rate?
The terms are often used interchangeably. Where organisations do distinguish them, turnover covers all separations including those you backfill, while attrition refers to positions left unfilled — headcount that shrinks through natural departure rather than redundancy.
Should I calculate turnover monthly or annually?
Calculate monthly and report on a rolling 12-month basis. Monthly calculation gives you a trend you can act on; the rolling annual view smooths out seasonal noise so you are not reacting to a single bad month.
Do internal transfers count as turnover?
Not for organisation-level turnover — the person has not left. They should count for team-level turnover, because a manager losing four people to internal moves has the same coverage problem as one losing four to resignations.
Related metrics
Voluntary turnover rate is the percentage of employees who choose to leave — resignations and retirements — as a share of average headcount. Isolating it from involuntary exits is what turns a turnover number into a retention signal, because only voluntary departures reflect decisions your organisation could have influenced.
Regretted Attrition RateRegretted attrition rate is the share of departures the organisation would have preferred to prevent — typically strong performers, people in critical roles, and those with scarce skills. It is the retention metric that correlates most directly with business impact, because it strips out the exits that were neutral or beneficial.
Employee Retention RateEmployee retention rate is the percentage of employees who remain with the organisation across a defined period, measured against the headcount present at the start. Unlike turnover, it only counts people who were already employed at the start of the period, so new hires who join and leave within it do not distort the figure.
Cost of Employee TurnoverCost of turnover is the total financial impact of an employee leaving and being replaced, combining direct replacement costs with the productivity lost while the role is vacant and while the replacement ramps up. It is the number that converts a retention conversation into a budget conversation.
New Hire Turnover RateNew hire turnover rate is the percentage of new employees who leave within a defined early window — most often 90 days, six months or one year of joining. It is a hiring and onboarding metric rather than a retention one, because departures this early usually trace back to selection, role clarity or the first-weeks experience.
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