Attrition Rate: Meaning and Purpose
The attrition rate measures the percentage of employees who leave the company over a period. It is one of the most watched retention metrics in HR.
Factors That Affect the Result
- Headcount at the start and end of the period
- Number of separations, voluntary and involuntary
- Length of the period measured
- Segments such as department, tenure or grade
- Benchmarks for your industry
How the Attrition Rate Is Calculated
Average headcount = (Opening headcount + Closing headcount) ÷ 2
Attrition rate % = Separations ÷ Average headcount × 100
Annualised rate = Rate × (12 ÷ Months in period)
Worked example
With 200 employees at the start, 220 at the end and 21 exits, the average headcount is 210 and the attrition rate is 10%.
How to Use This Calculator
- 1Enter the values in the fields on the left. Use figures from your payroll or policy.
- 2The result updates instantly as you type. Change any input to compare scenarios.
- 3Copy the result or print it to attach to your records.
- 4Check the notes under the result for statutory limits and policy points that may apply.
Why It Matters
A high attrition rate raises hiring, training and productivity costs. Tracking it by month shows whether the cause is hiring quality, pay or management.
Compliance note: Decide whether to include involuntary exits, retirements and contract ends, and keep the definition consistent over time.
Frequently Asked Questions
What is a good attrition rate?
It varies widely by industry. IT and BPO tend to see higher rates than manufacturing or government-linked firms, so compare against your sector and your own trend.
What is the difference between attrition and turnover?
Many people use them interchangeably. Strictly, attrition does not assume the role will be refilled, while turnover counts exits and replacements.
Should I count voluntary and involuntary exits together?
Track both, but report voluntary attrition separately because it reflects employee choice and is the number retention plans target.
How do I reduce attrition?
Start with exit interview themes, compensation benchmarks, manager quality and career paths, and measure again each quarter.
Is this attrition rate calculator free to use?
Yes. It is free, needs no signup, and your inputs stay in your browser.
How can Trilliant Software help with payroll calculations?
Trilliant Software calculates salary, statutory deductions, arrears and tax automatically in every pay run, so HR does not need to repeat these calculations by hand. Book a demo to see it working.