what is a tsp fers?
<answer> One of the three parts of retirement package, along with your FERS Basic Annuity and Social Security. <context> Thrift Savings Plan (TSP) for FERS Employees. The Thrift Savings Plan (TSP) for FERS employees is one of the three parts of your retirement package, along with your FERS Basic Annuity and Social Security. Participating in the TSP does not affect the amount of your Social Security benefit or your FERS Basic Annuity.