A considerable body of research indicates that prison-based treatment followed by continuing treatment in the community is effective in reducing drug abuse and crime among drug-abusing offenders. However, the impact of providing treatment is less than optimal because offenders often fail to follow through on treatment referrals, leave treatment early, or have poor engagement in treatment activities. In particular, participation in prison-based treatment alone is seldom effective in reducing drug use or recidivism unless it is followed by participation in community treatment. For correctional systems that provide a continuum of care model from prison to community, low rates of admission and retention result in poor outcomes and poor resource utilization. One way to address this problem is to provide incentives to parolees for community treatment participation. Although research supports the effectiveness of behavioral reinforcement, mainly in the form of contingency management (CM), for general substance abuse populations, CM has not yet been tested or adapted for use in community-based programs for offender populations, particularly to encourage treatment attendance.