In this guide, the authors outline the advantages of online eAssessment and examine the intellectual, technical, legal and cost issues that arise from its use. This guide outlines the major assessment types that are suitable for online assessment and makes a key distinction between formative and summative assessment. The focus is primarily on the latter since that is where the difficulties are most acute and robust systems most critical. A range of practical issues relating to the key stages in running a summative e-exam are explored and advice given on system requirements and on how to ensure that the exam runs smoothly when you ‘go live’. This section includes consideration of the way that using eAssessment might affect the standard setting and results analysis process. The section on future trends in online assessment explores possibilities such as computer adaptive testing and the automated assessment of free text answers. Finally, there is a consideration of the implications of these trends for management.