Labour Turnover Rate Calculator & Formula

This calculator works out your labour turnover rate, the percentage of employees who leave during a period. You enter the number of employees at the start and end of the period, plus the number of leavers, and it returns the turnover rate as a percentage. It is a standard HR metric used to assess staff retention and the stability of your workforce.

Formula

The labour turnover rate is calculated as:

Turnover Rate (%) = (Number of Leavers ÷ Average Number of Employees) × 100

Where:

• Number of Leavers = total employees who left during the period (resignations, retirements, dismissals, etc.)
• Average Number of Employees = (Employees at Start + Employees at End) ÷ 2

This formula gives a percentage that represents the proportion of your workforce that turned over during the period. A higher percentage indicates more movement, which can mean higher recruitment and training costs.

Worked Example

Using the default values from the calculator:

• Employees at start: 100
• Employees at end: 90
• Leavers during period: 15

Step 1: Calculate the average number of employees.

(100 + 90) ÷ 2 = 190 ÷ 2 = 95

Step 2: Divide leavers by the average.

15 ÷ 95 = 0.1579

Step 3: Multiply by 100 to get the percentage.

0.1579 × 100 = 15.8%

So the labour turnover rate is 15.8% for the period.

When to Use This

Use this calculation monthly, quarterly, or annually to track trends. It is useful for:

• Measuring the effectiveness of retention strategies.
• Comparing turnover between departments or teams.
• Benchmarking against industry averages (though these vary widely).
• Identifying periods of high or low staff churn.

How to Read the Result

A lower percentage generally indicates a more stable workforce. A higher percentage means more employees are leaving, which can be costly and disruptive. However, some turnover is normal and even healthy—it can bring fresh ideas and skills. There is no universal “good” rate; it depends on your industry, region, and the type of roles.

Common Mistakes

• Using only the start or end headcount instead of the average. This skews the result, especially if your workforce is growing or shrinking.
• Including internal transfers or promotions as leavers. Only count people who actually left the organisation, not those who moved to a different role.
• Mixing up time periods. If you calculate monthly, use monthly data consistently. Don’t compare a monthly rate to an annual rate.
• Forgetting to account for new hires. The average headcount should include all employees, not just those who were there the whole time.

Tips

• Use the same definition of “leaver” every time you calculate, so your data is comparable.
• Separate voluntary turnover (resignations) from involuntary (dismissals, layoffs) for deeper insight.
• Track turnover by department or tenure to spot problem areas.
• Combine the rate with exit interview data to understand why people leave.

Troubleshooting

If your result seems too high or too low:

• Check that you entered the correct numbers. A simple typo in the start or end headcount can change the result dramatically.
• Verify that you are using the average headcount, not just the end headcount. If your company is growing fast, the end headcount will be much higher than the average, making turnover look artificially low.
• Make sure you are counting leavers correctly. For example, if you have 100 employees at start, 15 leave, and you hire 10 new people, your end headcount is 95 (100 – 15 + 10 = 95). The leavers count is still 15.

If you get a result of 0% but you know people left:

• You may have entered 0 for leavers. Double-check that field.

If the calculator shows an error:

• Ensure all inputs are non-negative numbers. Negative values are not valid for headcounts or leavers.

Frequently Asked Questions

Q: What is a good labour turnover rate?
A: It varies by industry. For example, retail and hospitality often have higher turnover (20-30% or more), while professional services may be lower (10-15%). Compare against your own historical data and industry benchmarks.

Q: Should I include temporary or contract workers?
A: It depends on your purpose. If you are measuring the stability of your core workforce, exclude temps and contractors. If you want a full picture of all labour churn, include them. Just be consistent.

Q: How do I calculate turnover for a specific department?
A: Use the same formula but with the department’s start headcount, end headcount, and leavers. This helps identify teams with unusually high turnover.

Q: What is the difference between turnover rate and retention rate?
A: Turnover rate is the percentage of employees who leave during a period. Retention rate is the percentage of employees who stay. Retention rate = (Employees at end who were there at start ÷ Employees at start) × 100. They are related but measure opposite things.

Q: Can I calculate annual turnover from monthly data?
A: Yes, but you can’t simply add monthly rates. The correct approach is to sum the leavers across the 12 months and divide by the average headcount over the year. Or, you can calculate the monthly rate and average it, but that is less accurate.

Q: Why is average headcount used instead of end headcount?
A: Because the average better represents the number of employees who were exposed to the risk of leaving during the period. Using end headcount can understate turnover in a growing company and overstate it in a shrinking one.

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in start | Employees at start | - | 100 | 0
in end | Employees at end | - | 90 | 0
in leavers | Leavers during period | - | 15 | 0
out turnover | Turnover rate | % | (leavers / ((start + end) / 2)) * 100 | 1