A retirement plan similar to a 401 (k) plan that is offered to federal government employees.

A retirement savings and investment plan established by Congress in the Federal Employees' Retirement System Act of 1986 to provide eligible Federal employees savings and tax benefits similar to those offered by many private corporations. It is a defined contribution plan administered by the Federal Retirement Thrift Investment Board. CSRS employees can also contribute but receive no agency contributions.

A retirement savings plan that is offered to federal government workers, both uniformed service members and civilian employees. Specific information about the TSP is available at the Web site www.tsp.gov.

The Federal Thrift Savings Plan, or TSP, is a retirement savings plan for civilians who are, or previously were, employed by the United States Government and for members of the uniformed services. The TSP encompasses many millions of investors and has substantial assets. As of Summer 2006, the TSP had US$158,000,000,000 among 3.5 million investors.