Recidivism, as measured in this study, involved all charges for victim-involved sexual offenses. Over 5 years, 32 men out of the sample of 129 had a serious sexual charge filed against them (25-percent failure rate). Data entered into the cost-benefit model were total cost per offense (offender-related costs and victim-related costs), the cost of incarceration, the cost of treatment, and recidivism for those treated and those not treated. The study tentatively concludes that rehabilitation can reduce the likelihood of committing a new sexual offense. This is with a stringent definition of recidivism with a population that can be considered at high risk to recommit a sexual offense. Based on these findings, criminal justice policymakers should make proven treatment programs a part of every sentence for child molesters, since such an approach is more cost effective than punishment without treatment. 4 notes, 45 references, and appended expense variables and data