year of service. This is the same accrual rate that applies to regular FERS employees and applies to members of Congress first elected in 1984 or later. In 2002, the average congressional pension payment ranged from $41,000 to $55,000. , senior Members of Congress who have been in office for at least 32 years can earn about $139,000 a year. All senators and those representatives serving as members prior to September 30, 2003, may decline this coverage. Representatives entering office on or after September 30, 2003, cannot elect to be excluded from such coverage. Members who were already in Congress when Social Security coverage went into effect could either remain in CSRS or change their coverage to FERS. Retirement arrangements , members are covered under one of four retirement arrangements: CSRS and Social Security; The “CSRS Offset” plan, which includes both CSRS and Social Security, but with CSRS contributions and benefits reduced by Social Security contributions and benefits; FERS; or Social Security alone. Congressional pensions, like those of other federal employees, are financed through a combination of employee and employer contributions. 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. Members of Congress first covered by FERS after 2013 contribute 4.4% of pay to the CSRDF. Members covered by CSRS Offset pay 1.8% of the first $128,400 of salary in 2018, and 8.0% of salary above this amount, into the CSRDF. Under both CSRS and FERS, Members of Congress are eligible for a pension at the age of 62 if they have completed at least five years of service. Members are eligible for a pension at age 50 if they have completed 20 years of service, or at any age after completing 25 years of service. The amount of the pension depends on years of service and the average of the highest three years of salary. By law, the starting amount of a Member's retirement annuity may not exceed 80% of his or her final salary. There were 611 retired Members of Congress receiving federal pensions based fully or in part on their congressional service as of October 1, 2016.