The Digital Investment Tool is intended to support USAID staff in concretely integrating the Principles for Digital Development into programmatic digital systems through a participatory process with relevant stakeholders. The tool can be used throughout the program cycle, but is tailored for use during work planning and implementation. Use of this resource will support robust development of digital systems that are effective, sustainable, and support the self-reliance of local partners that own and operate these systems. The Digital Investment Tool will be most useful to technical staff, such as mission-based or mission-facing ICT advisors, who have background knowledge of digital technology use in USAID activities and will facilitate the participatory and prioritization processes presented in the resource. The Development Informatics team (devinfo@usaid.gov) is available to help support your use of this resource.