This Practice Note provides an outline of the law in relation to legal costs in civil proceedings in Ireland. It considers s 150 of the Legal Services Regulation Act 2015 (Ireland) and the requirements of a section 150 notice. It also considers the legal framework for legal costs, the requirement for a bill of costs, the categories of legal costs, the general rule in relation to costs, recoverable costs and adjudication of costs, costs on interim applications, lodgements and tenders in respect of costs and the steps taken to minimise costs. Finally, it looks at some recent developments and reform in this area.