The Transition Planning Inventory (TPI) is an important tool for planning the transition to life after school for students with disabilities. While interest in transition services has increased in the last decade in the Arab region, no transition assessment tools validated for the Arab population are currently available. This study is the first to validate an Arabic version (TPI-AR) for all three rating forms (student, home, and school) and examine its psychometric properties. The sample comprised 203 students with disabilities, a member of their family, and one of their teachers. The 11 subscales of TPI-AR for all three forms were found reliable and valid to be used with students with disabilities in Saudi Arabia, particularly in middle and high schools.