A growing body of research has examined the construct of bottom-line mentality (BLM), which captures a tunnel vision focus on securing bottom-line outcomes to the disregard of competing work priorities. We offer a systematic review of the literature to summarize current knowledge of BLM, what is missing in the literature, and key opportunities for advancing our theoretical understanding of the construct. Our review first defines and conceptualizes BLM and then organizes past BLM findings according to the key sources of BLM: (a) leader, (b) employee, and (c) collective BLM. When applicable, research on each source of BLM is synthesized with respect to its most prevalent theoretical frameworks and in relation to its (a) outcomes, (b) antecedents, and (c) instances whereby BLM serves as a moderator. Our discussion then examines the critical ways in which BLM research can advance with the most theoretical rigor. We first discuss whether there is value in studying a BLM with respect to non-financial, bottom-line outcomes. Second, we question whether BLMs always (or mostly) foster the desired bottom-line outcome. Third, we provide theoretical arguments that support BLM as a potentially activated psychological state that is driven by context and suggest specific contexts that could be the driving forces of BLMs at work. Finally, we discuss the ways in which BLM research can improve methodologically, including a suggestion of how to revise the current BLM measure to advance BLMs with respect to non-financial, bottom-line outcomes.