Every time someone resigns, the company pays a bill that almost never shows up on the income statement: recruiting hours, weeks of training, mistakes made by a new hire, overtime to cover the gap, and customers served by someone with less experience. Employee turnover is one of an organization’s largest costs and, at the same time, one of the least measured.
In this guide we explain how to calculate employee turnover step by step, what rate is reasonable in Mexico, and how to estimate what each departure costs you, so you stop treating it as “an HR issue” and manage it for what it is: a business metric.
What is employee turnover?
Employee turnover is the percentage of employees who leave the company during a given period, relative to the average number of employees in that period.
Not all turnover is the same. Before calculating it, split it into two main types:
- Voluntary turnover: the employee decides to leave (resignation, a better offer, relocation). This is the one that should worry you most, because it is often preventable and frequently takes people you didn’t want to lose.
- Involuntary turnover: the company decides the departure (dismissal, end of contract, restructuring). A high rate may point to problems in recruiting, selection, or onboarding.
It also helps to distinguish between desired turnover (a low performer leaves) and regrettable turnover (key talent leaves). Two companies with the same rate can be in very different situations depending on who is leaving.
How to calculate employee turnover: formula and example
The most widely used formula is:
Turnover rate (%) = (Number of departures in the period ÷ Average headcount in the period) × 100
Where average headcount is calculated as:
Average headcount = (Employees at the start of the period + Employees at the end of the period) ÷ 2
Practical example
A manufacturing company started the year with 118 employees and ended it with 122. During the year it recorded 30 departures.
- Average headcount: (118 + 122) ÷ 2 = 120 employees
- Annual turnover rate: (30 ÷ 120) × 100 = 25%
In other words, in one year the company replaced one out of every four people.
Four breakdowns that make the number truly useful
A single annual figure says little. To make decisions, also calculate turnover by:
- Month or quarter: helps you spot seasonal peaks (for example, after year-end bonuses or profit-sharing payments).
- Department, role, or shift: very often 70% of departures are concentrated in one or two areas, or under the same manager.
- Tenure: measure early turnover, meaning departures of people with less than 90 days. If it is high, the problem usually lies in selection, onboarding, or poorly communicated expectations.
- Voluntary vs. involuntary: each has different causes and solutions.
What turnover rate is “normal” in Mexico?
There is no universal figure: it depends on the industry, the type of role, and the region. As a reference, an Expansión report on the hidden cost of turnover notes that the Mexican Association for Human Resources Management (AMEDIRH) places labor turnover in Mexico at around 17%, while the OECD estimates it at 24.5%, above the average of its member countries.
In sectors with a large operational workforce, such as manufacturing, retail, services, and contact centers, rates tend to be considerably higher. That’s why, rather than comparing yourself to a national average, we recommend:
- Comparing yourself against your own history (are you better or worse than last year?).
- Comparing yourself against companies in your sector and region.
- Paying attention to who is leaving, not just how many.
How much does employee turnover cost?
This is where most companies are surprised. According to Gallup, replacing an employee can cost between half and twice their annual salary, depending on the complexity and level of the role. For operational roles the cost is lower; for middle managers, specialists, and executives it can easily exceed a full year’s salary.
The total cost is made up of four blocks:
| Cost block | What it includes |
|---|---|
| Separation | Severance or final pay, administrative paperwork, exit interview, HR and payroll hours. |
| Replacement | Job postings, recruiting and interview hours, assessments, agency fees. |
| Onboarding | Orientation, training, uniforms, equipment, system setup, and trainer time. |
| Lost productivity | The new employee’s learning curve, overtime to cover the vacancy, errors, rework, and poorly served customers. |
The first two blocks are easy to see because they generate invoices. The last two, which are usually the largest, are almost never recorded.
Example: cost per departure
Suppose an operational role with a monthly salary of MXN $15,000. A conservative estimate of the cost to replace it could look like this (illustrative figures, in Mexican pesos):
| Item | Estimated cost |
|---|---|
| Recruiting (job ads and HR hours) | $4,000 |
| Medical exams and orientation | $2,500 |
| Training (trainer time and materials) | $6,000 |
| Overtime to cover the vacancy (3 weeks) | $5,000 |
| Learning curve (3 months at 50% productivity) | $22,500 |
| Total per departure | ≈ $40,000 |
If the company in the earlier example had 30 departures in the year, its turnover costs around MXN $1.2 million per year, not counting the impact on quality, workplace climate, or customers. And that’s considering operational roles only.
Quick formula to estimate your annual cost
Annual turnover cost ≈ Number of departures × Average cost per departure
We suggest calculating it separately for operational, administrative, and management roles, because the cost per departure varies a lot between levels.
Signs your turnover is already a business problem
Beyond the number, pay attention if any of the following is happening in your company:
- Departures are concentrated in one specific department, shift, or manager.
- A significant share of exits happens within the first three months.
- You are losing strong performers, not just people who didn’t fit.
- Supervisors spend more time training new people than improving operations.
- Vacancies take longer and longer to fill.
- Customers notice errors or constant changes in their point of contact.
If you recognize two or more, turnover is already hurting your margins.
What to do after measuring it
Calculating turnover is the first step; the value lies in understanding why people leave. According to Pandapé’s Market Research 2025 study, the main reasons for resignations in Mexico are the search for better pay, the lack of internal growth opportunities, and the need for work-life balance.
But every company has its own combination of causes (we explain how to tell whether your turnover comes from leadership, pay, or lack of growth). To find yours:
- Segment the data using the four breakdowns above.
- Run structured exit interviews, with the same questions for everyone, and analyze the patterns every quarter.
- Measure workplace climate and cross-reference the results with the areas of highest turnover.
- Review the psychosocial risk factors required by Mexico’s NOM-035 standard; beyond being a legal obligation, they are a valuable source of information on leadership and workloads.
- Review pay and career paths for the roles with the most departures.
- Make turnover a leadership KPI, not just an HR one, with targets by department.
Frequently asked questions about employee turnover
How often should I calculate employee turnover?
Ideally, calculate it monthly and review the trend every quarter. The annual figure helps you compare yourself with the market, but the monthly one lets you react in time.
Should temporary or fixed-term employees be counted?
It depends on what you want to measure. We recommend calculating turnover separately for permanent and temporary staff, so that contracts ending by design don’t distort the metric.
What’s the difference between turnover and absenteeism?
Turnover measures permanent departures from the company; absenteeism measures temporary absences. The two are often related: high absenteeism frequently anticipates high turnover.
Is zero turnover possible?
It’s neither realistic nor desirable. Healthy turnover brings in new ideas and lets people who don’t fit move on. The goal isn’t to eliminate it, but to reduce regrettable and preventable turnover.
Conclusion
Employee turnover isn’t just an HR number: it’s a leak of money, knowledge, and operational capacity. Measuring it correctly, breaking it down, and putting a peso figure on it is what allows leadership to prioritize it with the seriousness it deserves.
At Total Consulting we help companies identify the real causes of their turnover and design retention, leadership, and talent development initiatives through our Talent and Belonging service. If you want to know how much turnover is costing you and where to start, schedule a free diagnostic session.
