This document is about a performance audit conducted by the U.S. Department of Labor's Employee Benefits Security Administration on the account maintenance processes of the Thrift Savings Plan (TSP). The audit covered the period from January 1, 2012 to March 31, 2013 and evaluated the effectiveness of the TSP's procedures for accurately reflecting participant contributions, daily valuation, fund balances, processing of contributions, adjustments, interfund transfers, forfeitures, and forfeiture restorations. The report outlines the background of the TSP, the audit objectives and methodology, the findings, and one recommendation related to the documentation of interfund transfer policies and procedures.