Since 2019, CoST has supported partners in Indonesia at the sub-national level, beginning with the Regency of West Lombok joining as a member. Seeing West Lombok’s early success, the wider Province of Nusa Tenggara Barat joined CoST in 2024.

Despite steady increases in Indonesia’s national infrastructure budget, which exceeded USD 24 billion in 20241, the country faces a projected infrastructure financing gap of nearly 40% between 2025 and 20292. Compounding this, persistent corruption risks threaten the efficiency and quality of large-scale investment. In this context, Indonesia cannot afford inefficiency or opaque decision-making. Sub-national governments such as West Lombok and Nusa Tenggara Barat are playing a critical role in safeguarding public funds, strengthening investor confidence to attract the additional private and multilateral financing needed to meet growing infrastructure demands.

This impact story shows how, through the CoST approach, the Regency of West Lombok (“West Lombok”) and the Province of Nusa Tenggara Barat (“Nusa Tenggara Barat” (NTB)) have built a culture of transparency which has delivered tangible improvements in roads, water and sanitation facilities, schools and hospitals.