Yes, the Thrift Savings Plan (TSP) is indeed a retirement plan. The TSP is a defined contribution retirement savings plan for federal employees, including members of the uniformed services. It is similar to a 401(k) plan in the private sector. Federal employees can contribute a portion of their salary to the TSP, and these contributions are tax-deferred, meaning that taxes are not paid on the contributions or any earnings until the funds are withdrawn in retirement. The TSP offers a variety of investment options, including lifecycle funds and individual funds that allow participants to choose their own asset allocation. Employer matching contributions may also be available for certain federal employees. Overall, the TSP is designed to help federal employees save for retirement and provides them with a valuable retirement benefit.