Objective: Public and private stakeholders of substance abuse treatment services require economic cost data to guide program evaluations and funding decisions. Background: Rigorous cost assessments have been conducted for several treatment programs across the United States, but a systematic and comprehensive evaluation of programs in a particular state has never been attempted. Research Design: The present study recruited all publicly funded treatment programs in the State of Florida and administered the Brief Drug Abuse Treatment Cost Analysis Program. Subjects: A total of 175 programs participated in the study, representing a 71% response rate. Measures: Annual, weekly, and episode costs are estimated by modality. Conclusion: The study procedures and empirical findings from this research can be used by program evaluators and government officials in Florida and other states as they develop service reimbursement algorithms and initiate more extensive evaluations of publicly funded substance abuse treatment programs. (Contains 3 tables and 3 notes.)