Staff Pay Levels for Selected Positions in Senators' Offices, FY2001-FY2020 [Updated April 20, 2021] [open pdf - 2MB]
From the Summary: "Levels of pay for congressional staff are a source of recurring questions among Members of Congress, congressional staff, and the public. There may be interest in congressional pay data from multiple perspectives, including assessment of the costs of congressional operations, guidance in setting pay levels for staff in Member offices, or comparison of congressional staff pay levels with those of other federal government pay systems. This report provides pay data for 24 staff position titles that are typically found in Senators' offices. The following table provides the positions, and the change in median pay levels between FY2019 and FY2020 for those positions, in constant 2021 dollars."
CRS Report for Congress, R44324
Congressional Research Service: https://crsreports.congress.gov/