ISO 50001 is an international standard that provides a framework for establishing, implementing, maintaining, and improving an energy management system (EnMS). The goal is to enable organizations to follow a systematic approach in achieving continual improvement of energy performance, including energy efficiency, energy use, and consumption. Auditing is a crucial component of ISO 50001, ensuring that the energy management system is effectively implemented and maintained. This article will discuss the ISO 50001 audit process, including preparation and best practices for a successful audit.