“Congressional Salaries and Allowances: In Brief,” is published by the Congressional Research Service and dated December 30, 2014. A quick look at salaries of Congressional members and officers is here.
The thirteen page publication, in its entirety, is available here. It includes The Members’ Representational Allowance (MRA): Supporting Personnel, Office Expenses, Travel to the District, and Mail for Members of the House and The Senators’ Official Personnel and Office Expense Account (SOPOEA): Supporting Personnel, Office Expenses, and Mail for U.S. Senators.