The Longitudinal Impact Study of Accion and Opportunity Fund Small Business Lending in the U.S. is a first-of-its-kind national, longitudinal, qualitative examination of social impact of small-dollar loans on household and family life, poverty alleviation, or community development. It reports on a nationwide cohort of 350 Accion and Opportunity Fund borrowers who were followed for as long as three years post loan to understand the impact of small business lending services on their businesses, their personal financial security, and their overall quality of life. The study examined how business owners define success and how access to capital supports their goals. Findings from this study identify opportunities for lenders to better meet the needs of entrepreneurs, and they also provide evidence to other lenders, policymakers, and small business supports about the ability of micro- and small-business lending to transform lives.