Abstinence-Contingent Wage Supplements for Drug Use was designed to promote drug abstinence and vocational entry among unemployed adults in treatment for opioid use disorder by providing financial incentives dependent on verified abstinence. During the 12-month program period, unemployed participants could earn up to 20 hours per week of wages for engaging in job-seeking activities with an employment specialist, at $10 per hour. Employed participants could receive wage supplements for verified hours worked, capped at $8 per hour for up to 40 hours per week.