Financial literacy is a skill that may be affected by decreased cognitive processes that arise from substance use disorder. The aim of this mixed-methods study was to determine change in financial acumen after participating in a financial literacy program. Study participants were recruited from a drug and alcohol treatment center in the Southeastern United States. A total of 31 males participated. A t-test was conducted to compare the scores on the financial tests. There was a significant difference between the financial literacy pretest ( M = 74, SD = 13.58) and posttest ( M = 84, SD = 10.50) scores; t(30) = −3.14, p = .003. Categories that emerged when participants were asked how the information would help manage their finances included: goal setting, saving, and understanding financial institutions. This study “provides preliminary evidence” that supports financial literacy program for this population and indicates that occupational therapy is a profession suited to do so.