This document introduces the Health Information System Performance Monitoring Tool (HISPMT), which is designed to help HIS managers systematically review key health information data sources and assess their performance. The HISPMT involves mapping indicators to 12 common data sources, assessing the validity and reliability of each source, and generating automated scores on the demand for and quality of data from each. The tool is intended to inform stakeholders and guide prioritization of investments to strengthen health information systems. It is targeted towards managers in low and middle-income countries and is being finalized for electronic use by June 2018.