sentences:  All Members pay Social Security payroll taxes equal to 6.2% of the Social Security taxable wage base ($128,400 in 2018).Members first covered by FERS prior to 2013 also pay 1.3% of full salary to the Civil Service Retirement and Disability Fund (CSRDF).Members of Congress first covered by FERS in 2013 contribute 3.1% of pay to the CSRDF.