For federal employees, selecting between the Civil Service Retirement System (CSRS) and the Federal Employees Retirement System (FERS) involves considering key differences. CSRS, applicable to those hired before 1984, offers a more substantial pension without Social Security or Thrift Savings Plan (TSP) participation. In contrast, FERS, covering employees hired after 1983, includes a ... https://www.federalpensionadvisors.com/post/csrs-vs-fers