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How to Calculate Attrition Rate in Excel? [Complete Guide with Formula]

     Joseph Robinson    |    HR Strategy


This article provides a detailed response to: How to Calculate Attrition Rate in Excel? [Complete Guide with Formula] For a comprehensive understanding of HR Strategy, we also include relevant case studies for further reading and links to HR Strategy templates.

TLDR Calculate attrition rate in Excel using this formula: (1) Employees who left ÷ (2) Average employees during the period × 100. This method helps track workforce turnover and supports strategic HR decisions.

Reading time: 4 minutes

Before we begin, let's review some important management concepts, as they relate to this question.

What does Workforce Analytics mean?
What does Data Integrity mean?
What does Segmented Analysis mean?


Calculating attrition rate in Excel is essential for HR leaders and C-level executives to monitor employee turnover effectively. Attrition rate, the percentage of employees leaving an organization during a specific period, can be calculated using a simple Excel formula: (Number of employees who left ÷ Average number of employees during the period) × 100. This metric, often called employee turnover rate, is critical for workforce planning and retention strategies.

Attrition rate analysis helps organizations understand workforce stability and predict hiring needs. Using Excel for this calculation allows for quick, accurate insights by leveraging built-in formulas. Leading consulting firms like McKinsey and Deloitte emphasize the importance of precise attrition measurement to inform strategic HR initiatives and reduce costly turnover. Secondary terms like “attrition formula in Excel” and “employee attrition rate formula” are key to mastering this process.

To apply this in Excel, first gather data on employees at the start and end of the period, plus the number who left. Calculate the average number of employees by adding start and end counts, then dividing by two. Dividing the number who left by this average and multiplying by 100 yields the attrition rate percentage. This straightforward approach provides executives with actionable workforce insights, supporting data-driven talent management decisions.

Step-by-Step Guide to Calculating Attrition Rate in Excel

First, ensure your data is organized in a clear and accessible manner. You might have a column for the number of employees at the start of the period (Column A), another for the number at the end (Column B), and a third for the number of employees who left (Column C). This setup provides a clear framework for your calculation.

Next, calculate the average number of employees during the period. In a new cell, use the formula =AVERAGE(A2, B2) if your numbers are in cells A2 and B2. This formula calculates the average number of employees, which is essential for determining the attrition rate accurately.

Finally, calculate the attrition rate. In a new cell, apply the formula =(C2/(AVERAGE(A2, B2)))*100, replacing A2 and B2 with the cells corresponding to your data. This formula gives you the attrition rate as a percentage, offering a clear view of workforce trends over the specified period.

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Best Practices and Considerations

While calculating the attrition rate in Excel is relatively straightforward, several best practices can enhance the accuracy and usefulness of your analysis. Firstly, consider the time frame of your analysis. A monthly attrition rate might reveal different insights compared to an annual rate. Depending on your strategic goals, you might adjust the period to align with specific business cycles or seasons.

Additionally, segmenting your analysis can provide deeper insights. For instance, calculating attrition rates by department, location, or employee level can uncover patterns or issues that are not apparent in a company-wide analysis. This segmented approach can inform more targeted strategies for improving employee retention and satisfaction.

Finally, it's crucial to contextualize your attrition rate within industry benchmarks or historical data. An attrition rate that might be concerning in one industry could be considered normal in another. Consulting industry reports or leveraging insights from firms like Gartner can provide valuable context for your analysis, helping you to set realistic targets and understand the underlying factors driving attrition in your organization.

Real-World Application

In practice, calculating the attrition rate using Excel has helped numerous organizations identify trends and issues within their workforce. For example, a retail chain might discover that their attrition rate spikes during the holiday season, indicating a need for better seasonal staffing strategies or improved support for existing employees during peak times. Similarly, a tech company might find that attrition rates are higher among certain skill sets, pointing to market demand for those skills and a need for competitive compensation packages.

Moreover, by integrating attrition rate calculations into regular performance management and strategic planning processes, organizations can proactively address workforce challenges. This ongoing analysis can inform recruitment, training, and retention strategies, ultimately leading to a more engaged and stable workforce.

In conclusion, understanding how to calculate attrition rate in Excel is more than a technical skill—it's a strategic asset. By leveraging this framework, C-level executives can gain actionable insights into their workforce dynamics, enabling data-driven decisions that support organizational goals and employee satisfaction.

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Joseph Robinson, New York

Operational Excellence, Management Consulting

This Q&A article was reviewed by Joseph Robinson. Joseph is the VP of Strategy at Flevy with expertise in Corporate Strategy and Operational Excellence. Prior to Flevy, Joseph worked at the Boston Consulting Group. He also has an MBA from MIT Sloan.

It is licensed under CC BY 4.0. You're free to share and adapt with attribution. To cite this article, please use:

Source: "How to Calculate Attrition Rate in Excel? [Complete Guide with Formula]," Flevy Management Insights, Joseph Robinson, 2026




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