On the default Natural HR "Dashboard" view, there is a tile which displays the attrition rate for your organisation, like so:

As of June 2020, there two options for how this attrition rate is calculated.  You can choose between these options by going to:

Administration -> Company -> Settings -> Dashboard settings

(The setting can be found under the Dashboard heading, labelled Attrition Calculation)

The options available are:

• Original - The system's default attrition calculation method takes the number of leavers and starters over a 12 month period, and the number of employees as of today, and uses the following calculation:
  
  (leavers x 100/(employees+starters)) = Attrition Rate
  
  For example, if a company has 100 employees today and in the last 12 months has had 10 leavers and 15 starters the calculation will be:
  
  (10 x 100/(100+15)) = 8.69%
  
  
  
• Revised - This new alternate calculation method takes the number of leavers in 12 months, and divides by the average employee of the headcount in the last 12 months ago and today.  The calculation used is:
  
  leavers / ((employees 12 months ago+employees today)/2) = Attrition Rate
  
  Using the same example of a company with 95 employees 12 months ago, 100 employees today, and 10 leavers in the last 12 months, the calculation will be:
  
  10 / ((95+100)/2) = 10.25%

Reporting

You can also set you your own attrition reports within the report builder section, these reports will only utilise the Revised function above and are not affected by the above setting 

The dataset for the report is called - Attrition Stats these reports are best set up as tile reports 

You have multiple options to chose from when builder the report regarding the length of the Attrition you want to look at the report has the below options

• 3m attrition rate (Company)
• 6m attrition rate (Company)
• 12m attrition rate (Company)
• 24m attrition rate (Company)
• 36m attrition rate (Company)

Important note for the report is these are company based calculations so will only display the value for the whole company and filters within the report do not affect the calculation 

For example if you apply a filter to only look at a certain department this will have no effect on the value that is displayed as the calculation only ever looks at the whole company