Though some frameworks suggest that siblings deplete family resources, alternative conceptualizations suggest that siblings, particularly in working-class and minoritized families, are pivotal sources of educational support that may replenish familial capital. Drawing on 41 in-depth interviews with Latino first-generation college students, this study addresses how siblings negotiate educational support. This study builds and extends prior literature on familial capital by proposing that college attendance generates additional resources that (re)shape family obligations and expectations, a process I refer to as the sibling intragenerational bargain. In negotiating the sibling intragenerational bargain, Latino students seek to (1) contribute to the family’s intragenerational mobility by providing educational support and/or (2) repay sibling sacrifices and help with their academic success. Furthermore, birth order and sibling educational attainment shape how students negotiate the sibling intragenerational bargain. This study shows how Latino first-generation siblings (older and younger) are agentic producers of familial capital.