Internal Auditor salary at Illinois State Toll Highway Authority

The average internal auditor salary at Illinois State Toll Highway Authority was $44,187 , which is 40 percent lower than the average salary for this job in Illinois, and 41 percent lower than the national average for this job . Internal Auditor salaries at Illinois State Toll Highway Authority typically range from $18,135 to $82,040 (25th to 75th percentile). The highest reported internal auditor salary was $82,040. There are 3 employees at Illinois State Toll Highway Authority with the job title internal auditor.