Students with intellectual and developmental disabilities (IDD) often face many challenges when moving from special education into mainstream or higher education settings. Existing transition models usually fall short in addressing the full range of educational, social, and cultural needs, particularly in diverse countries like India. Objective This study introduces and examines the Manovikas Transition Model, a comprehensive and culturally sensitive framework designed to support the educational, vocational, and community integration of individuals with intellectual and developmental disabilities (IDD). Methods Using a mixed-methods approach, the study combined interviews with key stakeholders (N = 50) and an analysis of student outcomes (N = 134). Areas of focus included academic progress, readiness for transition, skill development, and independent living abilities. Statistical analyses, including ANOVA and regression techniques, were applied to evaluate the model’s impact. Results Findings showed that students participating in the Manovikas Model reported greater satisfaction with school, a clearer understanding of academic material, stronger aspirations for employment, better access to therapies, and more involvement in cultural activities. Transition rates into vocational programs and higher education were also significantly higher compared to baseline measures (p < 0.05). Conclusion The Manovikas Model offers a robust and practical framework for helping students with IDD transition successfully to inclusive education and independent living. Its holistic, culturally grounded design provides a valuable template that can be adapted for diverse settings both within and outside India.