The pay survey covers all employees
The pay survey must cover all groups of employees and all employees in the service of the employer, including union members as well as employees who are not union members. Employees are included in the pay survey regardless of how they are paid.
Part-time and fixed-term employees must be included in the survey in the employee group to where they belong with regard their duties. In the pay survey the salary of part-time employees can be taken into account in proportion to working hours. More information on grouping employees in the pay survey can be found on the page Pay comparisons and the classifications/groupings used.
Carrying out pay surveys on agency workers' pay is the responsibility of the company who hires out labour (the agency) who has an employment relationship with the hired labour. The company (the user company) who hires labour from another company does not have to include the pay of agency workers in its own pay survey.
More information on taking temporary agency workers into account in gender equality planning is on the page Other legal relationships which are equivalent to employment relationships.