Deep-dive guide
Employee Turnover True Cost Simulator: What Every Departure Really Costs You
Executive industry analysis
Turnover is often reported as a percentage and treated as a fact of life. In money terms it is one of the largest controllable costs in a people-based business. When a person leaves, the salary is not simply saved. A role goes empty, colleagues cover the gap, a recruiting process begins, a replacement needs weeks of onboarding and months to reach full speed. Many studies and practitioners put the full cost of a departure at a large fraction of a year's salary, and sometimes more for specialist roles.
The structure of the problem is a repeating event. If sixty people turn over at twenty-two percent, about thirteen leave in a year, a little over one a month. Each departure sets off the same chain of costs: the recruiting cost, the vacancy, the ramp-up, the training and the drag on peers. The monthly bill is the number of departures multiplied by the cost of one. Both factors move with the turnover rate, so a small change in the rate is felt across everything at once.
The domino cascade starts with the number of leavers. More departures raise the total cost of replacing people, which means a larger share of monthly capacity is lost to empty seats and to new hires working at half speed. That lost capacity consumes a larger part of the margin each person is supposed to earn. The final stage is monthly profit: a firm with a thin margin per head can move from comfortable to loss-making through turnover alone, with no change in sales.
The iceberg shows what the job advert hides. Above the waterline sit the recruiting fees and the training budget, the items a human resources team can report. Below it sit four costs that are rarely added up: the output lost while the role is empty, the reduced output while the new hire ramps up, the distraction and overload of colleagues who cover and train, and the administration of the exit itself. The hidden part is usually several times the visible part.
Formula and methodology blueprint
The model works per month on a stable team. Departures per month are headcount times the annual turnover rate divided by twelve. Each departure costs the recruiting fee, training, lost output during the vacancy after colleagues cover part of it, half the output of a new hire for three months, an exit administration cost and a short-lived drag on peers. The margin before turnover is headcount times the output value minus the loaded cost of salary. The monthly result is that margin minus the total cost of departures.
- Departures per month
- D = headcount × turnover ÷ 12
- The average number of people who leave in a month.
- Loaded monthly cost
- W = salary × 1.25 ÷ 12
- Salary plus employer on-costs such as taxes, benefits and equipment.
- Cost per departure
- C = recruiting + 5% salary + vacancy months × value × 0.65 + 3 × value × 0.5 + 2% salary + 0.3 × value
- Recruiting, training, vacancy loss, ramp-up loss, exit administration and peer drag for one leaver.
- Margin before turnover
- G = headcount × (value − W)
- What the team earns each month if nobody left.
- Monthly profit
- Net = G − D × C
- The result. The breaking point is the turnover rate or vacancy length where it reaches zero.
Cascading elasticity
The turnover rate is the most elastic input because it multiplies the cost of every departure. Output per person and salary decide the margin that turnover has to be paid from, so a thin margin makes the same turnover far more dangerous. Vacancy length acts through lost output and is strongest for roles that produce a lot of value each month, while recruiting cost is linear and usually the smaller part.
Three real-world case studies
Bootstrapped starter
A small team with low turnover
A team of fifteen with modest pay and a close culture loses two or three people a year, fills roles within a month and recruits cheaply through referrals. The month is positive and turnover is a small part of it. Load it to see how a stable team keeps its margin.
Scaling mid-market
A large organisation that keeps people
A company of two hundred and fifty people holds turnover at sixteen percent with a standing talent pipeline. Departures happen every week, but the process is smooth and quick. Load it to see how scale amplifies even a modest rate.
Black-swan crisis
A revolving door
A fifty-person team loses sixty percent of its people each year. Roles stay empty for months, agencies are used for most hires and half the staff is always new. Load it to see how turnover alone can turn a productive team into a loss-making one.
Industry benchmark matrix
| Metric | Danger zone | Industry average | Top 10% elite |
|---|---|---|---|
| Annual voluntary turnover | Above 30% | 12–20% | Below 10% |
| Full cost of one departure | Over 1.5 × annual salary | 0.5–1 × annual salary | Under 0.4 × annual salary |
| Time to fill a role | Over 90 days | 35–50 days | Under 25 days |
| Time to full productivity | Over 6 months | 3–4 months | Under 2 months |
| Share of hires from referrals | Below 5% | 15–25% | Above 35% |
Variables and levers
Headcount
Number of employees in the group you are analysing.
Lever: Grow headcount only where each added person clearly creates more value than their loaded cost.
Output value per person per month
Revenue or business value one employee produces in a month.
Lever: Raise the output per person with better tools and clearer priorities, because margin per head decides how much turnover you can afford.
Average annual salary
Base salary per person per year, before employer on-costs.
Lever: Review pay against the market for the roles that leave most, since an adjustment often costs less than one replacement.
Annual turnover rate
Share of the workforce that leaves within a year.
Lever: Find out why people leave through stay interviews and exit data, and fix the top two causes before spending on hiring.
Recruiting cost per hire
Advertising, agency fees and interviewing cost as a share of annual salary.
Lever: Build referrals and an internal talent pool so that fewer hires depend on agencies and paid advertising.
Days the role stays empty
Average time between a person leaving and a replacement starting.
Lever: Keep a warm pipeline for the roles that churn most, so that a replacement can start within weeks.
How to use this simulator
- 1Start from the realistic preset or enter your headcount, salary and annual turnover rate.
- 2Set the value each person produces in a month, so margin per head is honest.
- 3Enter the recruiting cost and how many days a role typically stays empty.
- 4Press Find my breaking point to see which input erases monthly profit first.
- 5Compare the current situation with the retention programme over 24 months in the Parallel universe tab.
Mistakes to avoid
- Counting a departure as a saved salary. The vacancy saves wages but loses output, and the output is usually worth more than the wage.
- Measuring only the recruiting cost. Agency fees are visible, but the ramp-up and the drag on peers usually cost more.
- Using one company-wide turnover rate. Turnover concentrated in a critical team or in the first year is far more expensive than the average suggests.
- Spending on hiring before finding the cause. A retention problem fed by management or workload will refill the funnel faster than recruiting can empty it.
Frequently asked questions
Why is a departure so expensive?
Because the salary is only one of its costs. The empty seat, the recruiting process, the training, the months of reduced output and the strain on colleagues all add up, and most of them are never recorded as a single line.
Is all turnover bad?
No. Some departures, such as a poor fit leaving, can be healthy. This model prices an average departure, so apply it mainly to regretted losses, the people you would rather keep.
How do I set output value per person?
Use revenue or contribution per employee per month, divided across the group you analyse. For support roles, use the value of the work their time frees up.
Does a pay rise really reduce turnover?
Often, but not always. Pay is one of several causes, along with management, workload and career growth. The model includes a modest salary rise in the retention plan, and you should test the cause first.
How do I find the breaking point?
Press Find my breaking point. The tool pushes each input to its worse end in small steps and reports the value at which monthly profit reaches zero.
How accurate is this?
It is an educational planning model with the assumptions stated above, not human resources, legal or financial advice. Replace the inputs with your own figures and check employment rules in your country.
This is an educational planning model with stated assumptions. It is not financial, tax or legal advice. Replace the inputs with your own figures and verify important decisions with a qualified professional.