Due to the urgency of understanding Indonesian language in the business setting for foreign workers, the program of Indonesian for specific purposes (ISP) was designed. This research aimed to answer how the ISP materials are developed. To gather the information, the researcher employed Rogers’s (2002) ADDIE model of Research and Development (R&D) which was combined with Kemp’s instructional design model (1977) covering eight steps. The analysis result showed the needs of the learners and the characteristics and their language proficiency. The data became the foundation in designing syllabus and developing the materials using a text-based approach (Cahyono & Widiati, 2011). Since the program was tailored for 40 hours, eight topics were selected including the review and assessment. However, during the implementation of the materials in the learning process, some evaluations were found. Some exercises in certain units needed to be added, while some needed to be reduced in accordance with the learning objectives in each unit. After all, from eight units, only seven units were fully delivered. The researchers found other factors in influencing the completion of the ISP program were students’ workload in their office and classroom situations. The research result also showed it was possible to create ISP material using text-based approach and adaptation of English material due to the lack of sources.