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How do we calculate the rate of attrition for a month and also the rate of attrition for a year? I came across a formula for the calculation of the rate of monthly attrition which says:

Monthly attrition rate = {No. of separations for the month / (Opening headcount for the month + Closing headcount for the month) / 2} * 12 * 100.

I need to know whether this formula is correct or not. If it is, please explain it. If it is not, please provide the appropriate formula.

From India, Mumbai
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Hi Neha,

The attrition rate can be calculated using the formula: Attrition Rate = Number of resigned employees in that month / Available manpower * 100.

For example, if on any starting day of the previous month the manpower was 80, and during that month, 5 employees resigned and 10 new employees joined, then on the last day of the month, the manpower would be 80 - 5 + 10 = 85.

Therefore, the attrition rate would be calculated as 5 / 85 * 100. I hope this clarifies the query.

Regards,
Amit Seth.

From India, Ahmadabad
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Multiply by 100 means, we are converting it into Percentage. Example:- Suppose 8 employees left, and total staff is 80 in a month. The attrition rate = (8/80)*100 = 10% Hemant Agarwal
From India, Faridabad
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Thanks a lot, this is good.
From India, Mumbai
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Attrition rate has to be calculated only for the year or has to be annualized; The formula is = (No. of employees left during the year) / ((Opening Balance) + (addition during the year)) * 100. Assume the number of employees at the beginning of the year: 100. Added during the year: 300. Left during the year: 200.

Therefore, the calculation would be: (200) / (100 + 300) * 100 = 200 / 400 * 100 = 50%.

From India, Chennai
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