When comparing CSRS vs FERS, understanding the key differences is crucial for federal employees planning their retirement. CSRS (Civil Service Retirement System) offers a more traditional pension plan, while FERS (Federal Employees Retirement System) combines a smaller pension with Social Security benefits and a Thrift Savings Plan (TSP). This comprehensive guide explains both systems, helping you choose the best option to maximize your retirement benefits based on your unique financial situation and years of federal service.