The present study evaluated the use of stimulus equivalence to train novel money relations with adults with developmental disabilities. Three programs from the PEAK Relational Training System: Equivalence Module (PEAK-E) were used: Reflexivity: Money, Symmetry: Money to Monetary Value and Equivalence: Monetary Exchange. The overall goal of the study was to evaluate how stimulus equivalence could help the subjects improve money skills, a socially significant behavior for all adults. The study used a multiple probe design across programs to evaluate skill acquisition following the train/test procedure for each program. Results demonstrated a significant increase in PEAK scores from baseline probes for two of the three programs for all subjects. Additionally, results showed that all subjects learned untrained skills. The results of this study demonstrated the value of stimulus equivalence for teaching money skills as well the efficacy of the PEAK-E training system to teach adults with developmental disabilities.