Highest salary at Hays in year 2018 was $150,500. Number of employees at Hays in year 2018 was 231. Average annual salary was $60,693 and median salary was $59,367. Hays average salary is 29 percent higher than USA average and median salary is 37 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 1.3 percent, the median salary increased 1.5 percent.