This brief from the Urban Institute summaries insights drawn from a collaboration of researchers, practitioners, and local government officials, known as a Community of Practice, which convened to discuss issues facing transitional youth. The Urban Institute defines this population as young people, ages 16 to 24, who age out of foster care without plans for reunification or adoption and who are often involved with juvenile justice. The collaboration looked at funding transitional youth programs using the pay for success (PFS) model. The brief provides recommendations developed by the Community of Practice aimed at local governments, service providers, and other partners considering PFS projects for transitional youth. (author abstract modified)