The majority of community college entrants aspire to earn a bachelor's degree; yet fewer than a third do. States use several strategies to support community college's transfer function, including a transferrable core curriculum, a block of pre-major coursework universally accepted at public postsecondary institutions. In this study, we used statewide administrative data from Texas--a state with a transferable core--to examine pre-transfer credit accumulation and how pre-transfer core credits predict bachelor's degree attainment and time to degree for community college transfer students. Our results illuminate high variation in pre-transfer core credit accumulation among community college transfer students. Each additional pre-transfer core credit improves students' probability of earning a bachelor's degree, but only up to core completion status. Soon after students are core complete--at which point universities are no longer required to transfer in additional core credits, students experience a negative relationship between core credits and bachelor's degree attainment.