Research about the economic impact of nurse turnover has been compromised by a lack of consistent definitions and measurement. This article describes a study that was designed to refine a methodology to examine the costs associated with nurse turnover. Nursing unit managers responded to a survey that contained items relating to budgeted full-time equivalents, new hires, and turnover, as well as direct and indirect costs. The highest mean direct cost was incurred through temporary replacements, whereas the highest indirect cost was decreased initial productivity of the new hire. The study allowed the identification of the availability of data and where further refinement of data definition of variables is needed. The results provided significant evidence to justify increased emphasis on nurse retention strategies and the creation of healthy work environments for nurses.