Most turnover research positions employee turnover as the dependent variable and focuses on identifying its antecedents. In this study, we viewed turnover as a key predictor in determining unit-level performance. Specifically, a structural model was developed and tested that links managerial and employee turnover with performance through efficiency. We tested the model using a sample of 262 BURGER KING® restaurants. Results demonstrate that efficiency, measured as customer "wait time," mediates the relationships of both management and crew turnover to both sales and profit, and efficiency, measured as food waste, does not mediate the relationship of turnover to sales or profit.