Internal Security Investigator I pay range
State of Illinois · class code 21731
- Class code
- 21731
- Salary plan
- RC-062-18-B
- Pay unit
- Year
- Alternate ranges
- 4
- State
- Illinois
- The State of Illinois published pay range for Internal Security Investigator I is $73,620 to $116,328 per year, spanning every alternate range the plan defines.
- Illinois Department of Central Management Services keys this classification as class code 21731.
- The plan defines 4 alternate ranges for this class, so the rate depends on which criteria an employee meets.
- This is the range the plan authorises, not the salary of any individual employee.
Step progression
Illinois Department of Central Management Services assigns this class to salary range RC-062-18-B in the Illinois salary plan RC-062-18-B. The range pays 10 steps; a step is normally earned on a periodic increment date, not negotiated.
| Basis | Step 1b | Step 1a | Step 1 | Step 2 | Step 3 | Step 4 | Step 5 | Step 6 | Step 7 | Step 8 |
|---|---|---|---|---|---|---|---|---|---|---|
| Annual | $73,620 | $75,924 | $77,088 | $80,796 | $84,528 | $88,428 | $91,980 | $95,700 | $101,388 | $105,480 |
| Monthly | $6,135 | $6,327 | $6,424 | $6,733 | $7,044 | $7,369 | $7,665 | $7,975 | $8,449 | $8,790 |
Steps as published. The monthly row is the state's own, not a conversion of the annual row.
Alternate ranges
| Range | Minimum | Maximum | Basis |
|---|---|---|---|
| Range RC-062-18-B | $73,620 | $105,480 | per year |
| Range RC-062-18-Q | $76,848 | $110,244 | per year |
| Range RC-062-18-S | $78,084 | $111,684 | per year |
| Range MS-22-4 | $79,692 | $116,328 | per year |
Which alternate range applies is set by the plan's own criteria (experience, certification or assignment). The criteria text lives in the source document.
Where this comes from
Illinois Department of Central Management Services publishes this figure in Alphabetic Index of Position Titles, effective July 1, 2026. Every number on this page is read from that document; nothing is estimated, modelled or averaged.