This paper addresses literature on neoliberalism and borders by discussing the effects of neoliberalism on migrant lives in Mae Sot, a town on the Thai-Myanmar border inhabited by approximately 200,000 migrants from Myanmar. Mae Sot has been an area peripheral to centres of state power since the 1980s.Hence despite being subject to periodic immigration crackdowns, undocumented migrants were able to establish a semi-legal social system along the border comprising schools, clinics, and community organizations, which allowed migrants to access functions ordinarily provided by a state. However, since Myanmar's transition to a nominally civilian government in 2010, neoliberalism has dismantled this quasistate system in two ways. Firstly, Mae Sot has acquired an unprecedented centrality to the Thai state's border development agenda: the once-marginal border area is positioned as a key node in transport networks stretching across mainland Southeast Asia, while migrant labour has been framed as a draw for foreign investors. Secondly, Western donors that have long supported the migrant social system are rerouting their resources to Myanmar's central government, thereby threatening informal processes of social reproduction along the Thai-Myanmar border. Overall, the neoliberal agendas of these actors rearticulate migrants as naked labour: they are increasingly recognised for their ability to work but cut adrift from the social systems they have long relied on. Whereas existing literature argues that neoliberalism has imbued borders with a filtering function through which the mobilities of migrant bodies are managed according to their perceived value to processes of capital accumulation, the full extent of neoliberalism's effects on the Thai-Myanmar border can only be apprehended when one considers how the quasi-state system is being reconfigured-and indeed, rendered increasingly precarious. In other words, the current situation of migrants in Mae Sot compels geographers to consider the effects of neoliberalism on a borderscape constituted by relations between migrants and other borderland actors.