It is important for an Internal Audit function to put in place performance metrics to measure its effectiveness, boost its value proposition and enhance credibility via-a-vis stakeholders. This publication provides insight on performance measurement in the internal audit in public sector context and offers examples of performance measures that can useful for internal audit teams and regulators. It outlines the requirements of the International Standards for the Professional Practice of Internal Auditing (ISPPIA) pertaining to performance measurement, highlights extant professional guidance available on the subject and includes views from the Asian Development Bank on implementing performance measures in practice.