In Spring 2015, SDSN led a consortium of academic institutions, technical agencies and civil society representatives to develop a shared, comprehensive assessment of investments required to build a strong statistical architecture in support of the SDGs. The Data for Development report sets out a typology of the necessary statistical tools and a set of common principles and methodological parameters to harmonize the costing process. We estimate that a total of $1 billion USD per year will be required to enable 77 of the world’s lower-income countries to effectively track the SDGs. International assistance will be required to support country efforts to monitor the SDGs and adopt new, innovative approaches to fulfill the data revolution.