This report discusses the retirement systems in place for federal employees. Most civilian federal employees who were hired before 1984 are covered by the Civil Service Retirement System, and contribute 7.0% of their pay to a retirement fund. Federal employees hired in 1984 or later are covered by the Federal Employees' Retirement System and contribute 0.8% of their pay to a retirement fund. Both require participants to contribute toward the cost of their pensions through a payroll tax. This report also summarizes relevant legislation in the 113th Congress that would make significant changes to federal benefits and financing, including H.J.Res. 59, S. 18, S. 1678, and H.R. 3639