A Broken Shift Allowance can be created with a "Extra Rule". Note these steps are not to be confused with a "Broken Shift"
Navigate to Menu > Settings > Payroll Rules > Extra Rules > Click the "Create New Rule" button.
The key values to setup:
Example
The allowance is half an hour of an employee's ordinary pay - Set as Percentage.
The allowance is $19 per broken shift - Set as Fixed.
Example
The allowance is half an hour of an employee's ordinary pay - Set as 0.5.
The allowance is $19 per broken shift - Set as 19.