Is TSP A Retirement Plan? 
A TSP -LRB- thrift saving plan -RRB- is a qualified retirement plan used by both public and private entities but it is more common in government bodies such as state and local municipalities and school systems . The TSP is a money purchase plan , very similar to the more common 401 -LRB- k -RRB- . Some employers offer both a TSP and defined benefit plan . 