While several studies have examined teachers’ reasons for seeking employment in charter schools, few have asked why teachers are leaving them. This study of teacher attrition takes up that question, analyzing existing data from teacher surveys administered during state evaluations. Survey results were compared and re-analyzed based on teachers’ decisions to leave or to stay in their charter schools the year following the survey. This analysis yielded substantive information about the characteristics of teachers who leave charter schools and about teachers’ relative satisfaction with various elements of their experience.