What is a good employee turnover rate?

There is no universal threshold: retail runs at 40%, manufacturing at 12%. Compare yourself to your sector and your own history, never to a national average.

Does parental leave count toward turnover?

No. Parental leave, disability leave and internal transfers are not departures: the person is still employed. Only permanent exits from payroll count.

What period should turnover be calculated over?

A rolling twelve months above 50 employees, 24 months below that: at 30 employees a single departure is worth 3.3 percentage points and makes the trend unreadable.

Should seasonal employees be included?

Exclude them from the headline rate, calculate them separately. Otherwise the end of each season produces a spike unrelated to your real retention.

What is the difference between turnover rate and retention rate?

Retention looks only at the people present at the start of the period and asks how many are still there at the end. Turnover counts every departure, including people hired and lost within the same year. The two do not add up to 100%, and only turnover sees a revolving door.

How do I calculate turnover for a single quarter?

Use the quarter's departures over the quarter's average headcount, without annualizing by multiplying by four: a quarter holds too few departures for that extrapolation, especially under 100 employees. Present it as a quarterly figure, alongside the rolling twelve-month rate.

Employee turnover rate: the complete formula

Most turnover rates we get shown are wrong by a factor that changes the conclusion. The error is almost always in the denominator.

The formula

Average headcount is (headcount at start + headcount at end) ÷ 2, not the December 31 figure. A company that grows from 80 to 120 employees over the year with 20 departures has a rate of 20%, not 16.7%.

What counts as a departure

Any permanent exit from payroll: resignation, termination, end of contract, retirement, death. Parental leave, disability leave and internal transfers do not.

Average headcount, the exact version

Averaging the two endpoints is fine when growth is steady. It lies the moment the year isn't. Take a seasonal business that opens the year at 100 people, climbs to 180 in July and drops back to 100 by December: the two-endpoint average says 100, and its real denominator is closer to 130.

The exact version: add up the month-end headcount and divide by twelve. If your headcount swings more than 15% within the year, don't take the shortcut.

Month-by-month headcount curve with departures marked, the denominator behind the employee turnover rate — Twelve monthly readings instead of two. That's the difference between an accurate denominator and a convenient one.

Separate voluntary from the rest

A blended rate is useless. Three companies at 18% can be living three very different situations.

Company	Blended rate	Voluntary share	Reading
A	18%	16%	Retention. People are choosing to leave
B	18%	4%	Restructuring. The employer's decision
C	18%	9%	Mixed. Look at sub-one-year departures first

The voluntary rate measures organizational health. The rest measures your decisions.

One full calculation

Here's the whole exercise on a 140-person services company. Headcount last December 31 was 128, this year it closes at 152. The sum of the twelve monthly readings divided by twelve gives 141: neither 128, nor 152, nor 140.

Twenty-six people left. Strip out what isn't a departure: two parental leaves and one transfer to the Ontario subsidiary. That leaves 23 real departures.

Calculation	Result	What you do with it
23 ÷ 141 × 100	16.3% blended turnover	The number for the board
15 resignations ÷ 141 × 100	10.6% voluntary turnover	The actual health indicator
8 involuntary exits ÷ 141 × 100	5.7%	A reflection of your decisions
9 sub-12-month exits ÷ 141 × 100	6.4% first-year turnover	The alarm bell

A 16.3% blended rate in services isn't dramatic. But nine of the twenty-three departures are people who'd been there under a year: 39% of all turnover happens in year one. The problem is hiring, onboarding or the gap between what was promised at interview and what exists. Without that row, this company launches a recognition programme and fixes nothing.

The turnover rate calculator runs these four lines, monthly average included.

First-year turnover

It's the highest-yield split available, and almost nobody runs it. Someone leaving after eight months and someone leaving after eleven years don't share a cause, a cost or a fix.

Calculate it against the same denominator as your headline rate, counting only people who left before their first anniversary. Above 20%, the problem sits upstream: your selection process, your job description or the first week.

Turnover and retention are not two halves of 100

A classic trap: "we're at 85% retention, so 15% turnover." The two measures don't count the same population. A company that hires 30 people in January and loses 25 of them in October posts excellent retention alongside catastrophic turnover. Present turnover: it sees the revolving door that retention misses.

The traps

Before presenting the number

Average headcount, not end-of-period headcount.
Twelve monthly readings if headcount swings more than 15% in the year.
Voluntary departures isolated from the total.
Sub-12-month departures counted separately.
Seasonal roles excluded or calculated separately.
The same definition year over year or the trend means nothing.

Management meeting in front of a dashboard where the employee turnover rate is broken down — A rate presented without its breakdown starts a discussion about opinions.

What the number does not tell you

A turnover rate is a symptom, not a diagnosis: it tells you something is happening, never what. Cross three things: average tenure before departure, the reporting manager and what the exit interviews say.

The second is the most useful. Recalculate the rate by reporting manager, over 24 months so small teams mean anything at all. Almost everywhere, one or two teams carry a share of the turnover wildly out of proportion to their share of headcount.

A rate climbing from 12% to 19% in one year inside a single team is not an HR problem. It is a management problem, and it has a name.

What to do with the number

An indicator that triggers no action is decorative. Set the thresholds in advance, before anyone is being defensive.

What you see	What it means	The action
Voluntary flat, below your own history	Nothing to report	Measure quarterly
Voluntary up 3 points or more	Something changed this year	Segment by team and tenure before acting
First-year above 20%	The problem is hiring or onboarding	Rework selection and the first 90 days
Concentrated in one team	A management problem, not an HR one	A conversation, not a programme

Before you argue over a budget, work out what turnover costs you. The cost-of-departure calculator converts the percentage into dollars, and that's when finance starts listening.

The number tells you there is a problem, never which one. That is what an organizational diagnostic goes after, in three weeks of interviews and real data.