Compulsory sterilisation was one of the most provocative aspects of the history of Swedish Social Policy. Much has been written about the topic from a social discourse perspective, while the economic discourse of compulsory sterilisation has not been fully recognised. This paper suggests that one needs to use an economic discourse to fully understand some aspects of compulsory sterilisation in the Swedish welfare state discourse between the 1910s and the late 1940s. This paper is based on a discourse analysis: by (...) using metaphors it analyses how pragmatic economic considerations played an important role in creating public support for compulsory sterilisation. This paper suggests that economic motives became the dominant factor in the social democratic eugenic discourse over time and thereby replaced the racial and conservative elements of the dominant Swedish eugenic discourse. The network around Herman Lundborg, director of the Government Institute for Race Biology, changed the focus on costs as an important motive for compulsory sterilisation which was also used by the social democratic scholars Gunnar and Alva Myrdal. The paper indicates that using economic metaphors could create a more diverse understanding of the Swedish welfare state that had other motives than just social ones. (shrink)