Attrition Rate

What is Attrition Rate?

Attrition rate measures how many people leave an organisation over a set window (usually a month, quarter, or year) relative to the average number of employees during that window. It counts all exits, both voluntary (resignations, retirement) and involuntary (terminations, layoffs), though many companies also track voluntary attrition separately to gauge how many people are choosing to leave. The average headcount is used as the denominator because staff strength changes through the period, so an average of the opening and closing counts gives a fairer base than either alone. Attrition rate is one of the core people metrics HR teams report to leadership, because it signals retention health, feeds into hiring plans, and links directly to the cost of backfilling roles.

Formula: Attrition Rate (%) = (Number of employees who left ÷ Average headcount) × 100 Average headcount = (Opening headcount + Closing headcount) ÷ 2 Annualised rate (from a monthly figure) = Monthly attrition rate × 12

Example

A company starts the year with 180 employees and ends with 220, so average headcount = (180 + 220) ÷ 2 = 200. If 30 people left during the year, annual attrition = (30 ÷ 200) × 100 = 15%. If 5 people leave in a single month with an average headcount of 200, the monthly rate is 2.5%, which annualises to 30%.

How Attrition Rate is used

In an Indian company, HR pulls exits and average headcount from the HRMS each month and reports attrition to management, often split by voluntary vs involuntary, by department, and by tenure band (first-year attrition is watched closely). The figure drives the hiring pipeline and backfill budget, and a spike usually triggers exit-interview analysis to find the root cause. IT and BPO sectors in India often run higher attrition than manufacturing or BFSI, so teams compare against their own industry rather than a single national number.

Attrition Rate FAQs

What is a good attrition rate in India?

There is no single benchmark because it varies by sector. IT services and BPO often see 15% to 25% or higher, while manufacturing and BFSI tend to run lower at around 8% to 15%. Compare your rate against your own industry and your past trend rather than a fixed target.

What is the difference between attrition and turnover?

The two terms are used interchangeably in most Indian companies. When a distinction is drawn, attrition refers to positions that are not refilled (the headcount shrinks), while turnover refers to any exit regardless of whether the role is backfilled.

How do you annualise a monthly attrition rate?

Multiply the monthly attrition rate by 12. For example, a 2% monthly rate annualises to roughly 24%. This projects the current pace over a full year and is useful for spotting trends early, but it assumes the monthly rate stays steady.