How to Calculate Attrition Rate: With Formula and Examples

For businesses and organizations that aim to thrive in their respective and ever-competitive industries, understanding the concept of attrition rate is a strategic advantage.

According to a recent study , the average annual turnover rate in the US was at 30%, while the average voluntary and involuntary employee turnover rates were at 23% and 11%, respectively. But how many of these employee departures weren’t replaced?

HR managers, business owners, and professionals alike depend on the attrition rate to assess workforce stability, measure the impact of company culture, and respond proactively to economic conditions. This authoritative guide takes a deeper dive into attrition rate and empowers you to make informed, data-driven decisions for your organization.

What is attrition rate?

Attrition rate, also known as employee attrition or sometimes employee churn rate, is a key HR metric that measures the pace at which employees leave your company within a defined period.

Unlike turnover rate, which sometimes implies replacement, attrition rate measures the number of employee exits that aren’t rapidly filled. The rate is typically expressed as a percentage, providing a clear view of an organization's health and employee retention.

A recent report by the Bureau of Labor Statistics (BLS) states that the total number of quits in May 2025 was 3.3 million, while layoffs and discharges were at 1.6 million. This further highlights the importance of having a robust talent management system within your company.

What is the importance of attrition rate?

An organization’s attrition rate provides crucial insights into its overall health and performance in several aspects, such as the following:

• Operational efficiency: High attrition disrupts operations, burdens teams, and often increases recruiting and training costs.

• Company culture health: Consistently low attrition rates suggest a positive company culture where employees are engaged, valued, and see growth opportunities.

• Strategic planning: Monitoring attrition rates enables forecasting, budgeting, and workforce planning, especially during volatile economic conditions.

• Employer brand: Low attrition rates enhance brand reputation and attract top talent, whereas persistent high attrition signals red flags to prospective employees or investors.

Factors affecting attrition

As an employer, understanding the reasons why your employees leave is essential to managing and reducing attrition rates. Key factors influencing them include:

1. Compensation and benefits: A study discovered that 46% of employees believe that a salary or bonus is their greatest motivator for staying at their current company. This is why non-competitive packages or a lack of pay transparency drive voluntary exits.

2. Work/life balance: Excessive workloads and lack of flexibility increase stress and disengagement, resulting in voluntary quits by employees.

3. Career growth opportunities: Your employees want their careers to grow and flourish within your company. That’s why insufficient advancement opportunities and stagnation often lead to attrition.

4. Company culture: Your employees’ firsthand experience also affects attrition rates. Key aspects such as poor management, lack of recognition, low employee engagement, and misalignment with organizational values must be dealt with accordingly.

5. Economic conditions: Layoffs, restructuring, or business model pivots may force involuntary attrition. Especially since every employee needs a stable source of income to afford their basic needs.

6. Workforce demographics: This is usually overlooked by employers, but group-specific attrition can indicate systemic cultural or inclusivity issues.

Types of attrition

As we’ve discussed, employee attrition rates are highly influenced by several factors. This makes attrition rate calculation multi-dimensional, and identifying the type of attrition provides actionable insights for employers like you:

Type	Description
Voluntary Attrition	These departures are usually initiated by employees due to several reasons, such as poor employee satisfaction, better opportunities, retirement, or personal reasons.
Involuntary Attrition	These are employer-initiated exits such as layoffs, terminations, or workforce reductions, due to varying business needs.
Internal Attrition	A good example would be an employee leaving one department for another within the company, which indicates internal mobility or looming departmental issues.
Demographic-Specific Attrition	This refers to an elevated attrition within a specific group (e.g., gender, ethnicity, age), which signals possible inclusion or cultural issues.

Identifying patterns such as high internal attrition in a single department or concentrated demographic losses can direct targeted interventions and improve overall company culture. Moreover, strengthening your company’s salary planning strategies can already address the most common source of attrition—compensation.

In these situations, a reliable Compensation Planning Software can help you navigate not only employee attrition, but several other key issues as well. Whether it concerns merit, bonus, equity, or reward, total compensation management is a proven method to align your company’s compensation strategies.

How to calculate attrition rate

Calculating the attrition rate is a clear, data-driven process. Make sure that you approach it step by step, using the industry-standard attrition rate formula for accurate and market-aligned results. Here's how to calculate attrition rate:

1. Step 1: Establish the time period

   Decide whether you are analyzing monthly, quarterly, semi-annually, or the annual attrition rate. Remember that consistency is key to effective benchmarking.

   Ensuring that you have the optimal workforce at all times makes success for every business attainable. This is why Compensation Planning is essential: to mitigate errors, streamline collaboration, centralize planning, and ultimately let companies like yours incentivize without compromise.

2. Step 2: Determine the number of employees who left

   Count the total number of employees who exited or left (voluntarily or involuntarily) during the established or given period.

3. Step 3: Calculate the average number of employees

   Calculate the average number of employees during that period. Not just starting or ending headcount. This is accomplished with:

   Average Number of Employees = (Number at Start + Number at End) / 2

4. Step 4: Apply the attrition rate formula

   The definitive attrition rate formula is:

   Attrition Rate = (Number of Employees Who Left / Average Number of Employees) x 100

Attrition Rate Calculation Examples

As an employer or HR professional, the attrition rate plays an important role in your job description. Therefore, learning how to calculate it is undoubtedly a huge advantage.

Needless to say, that the best and most effective way to master it is by putting the theory and formula into practice with business scenarios familiar to HR professionals and company leaders:

Example 1: Straightforward calculation

Company XYZ starts the year with 100 employees and ends with 90. Therefore, during the whole year, 10 employees left the company. Calculate the average number of employees and the company's attrition rate.

Solution:

Average # of employees = (100 + 90) / 2 = 95

Attrition rate = (10 / 95) x 100 = 10.5%

Example 2: Quarterly attrition with rehiring

Let’s say that Business A began the quarter with 200 employees. Since the start of that quarter, they hired 10 new workers, lost employees due to layoffs with 18, and finished with 192 people. What is the average number of employees and the attrition rate?

Solution:

Average # of employees = (200 + 192)/2 = 196

Attrition rate = (18/196) x 100 = 9.18%

Example 3: Complex scenario - growth and exits

Suppose that Corporation 123 started the year with 1,000 employees, hired 100 new people during it, had 70 voluntary quits, and laid off 25 workers. How much would be the final headcount, the average number of employees, and the attrition rate?

Solution:

Final headcount = 1000 + 100 - 70 - 40 = 990

Average # of employees = (1000 + 990)/2 = 995

Attrition rate = (110/995) x 100 = 11.06%

What is a healthy attrition rate?

Every company’s definition of a “good” attrition rate may vary depending on a lot of factors. But according to a recent study, organizations should aim for at least a 10% or lower attrition rate, which represents a healthy company culture. Anything more than that can already be considered high employee attrition.

By understanding how to calculate attrition rate, leveraging the attrition rate formula, and acting on the insights from your attrition rate calculation, your organization can boost retention, safeguard institutional knowledge, and foster a dynamic company culture. Keep in mind that this isn’t merely an HR task, but a strategic advantage for sustained business performance.