The Tech Leavers Study is a first-of-its-kind national study examining why people voluntarily left their jobs in tech. The Kapor Center for Social Impact and Harris Poll surveyed a representative sample of more than 2,000 U.S. adults who have left a job in a technology-related industry or function within the last three years. How do experiences and microaggressions such as sexist comments and racist and stereotypical jokes affect employee turnover? Does tech workplace culture contribute to tech's overall dismal diversity numbers by driving underrepresented employees out of the door? While people leave their jobs for a variety of reasons, from the desire to seek career advancement or greater pay to a shorter commute or a change of careers, the study found that unfair treatment is the single largest driver of turnover affecting all groups, and most acutely affects underrepresented professionals. Workplace culture drives turnover, significantly affecting the retention of underrepresented groups, and costing the industry more than $16 billion each year.