Understanding Employee Attrition Rate
Attrition rate (also called turnover rate) measures what percentage of a workforce departed during a given period. It is one of the most financially significant HR metrics — replacing an employee costs 50–200% of their annual salary when accounting for recruitment, onboarding, training, and productivity ramp-up.
The SHRM 2024 Human Capital Benchmarking Report found the average US voluntary turnover rate is 17%, costing employers approximately $4,700 per hire in direct costs alone, with total economic cost estimates reaching $10,000–$30,000 per mid-level employee.
Attrition Rate Benchmarks by Industry
| Industry | Average Annual Attrition | High-Risk Threshold |
|---|---|---|
| Technology | 13% | > 20% |
| Retail | 60% | > 80% |
| Healthcare | 22% | > 30% |
| Financial Services | 12% | > 18% |
| Manufacturing | 15% | > 22% |
The Attrition Rate Formula
\text{Attrition Rate} = \frac{\text{Employees Who Left}}{\text{Average Headcount}} \times 100
\text{Average Headcount} = \frac{\text{Start Headcount} + \text{End Headcount}}{2}
\text{Employees Left} = \text{Start} + \text{New Hires} - \text{End}
The True Cost of Attrition
| Cost Category | % of Annual Salary |
|---|---|
| Recruitment (job boards, agency fees) | 10–25% |
| Interviewing & selection (manager time) | 5–10% |
| Onboarding & training | 10–20% |
| Reduced productivity during ramp-up | 25–100% |
| Knowledge loss & team disruption | 10–50% |
| Total | 50–200% |