This guide is for individuals and teams responsible for designing tax programmes to help them consider guiding questions on gender issues. The guide is part of the Knowledge, Evidence and Learning for Development (K4D) Programme’s Learning Journey on Tax & Gender, which was undertaken by the UK Foreign Commonwealth and Development Office (FCDO). The purpose of this guide is to share our learning with fellow donors. The guide refers to two kinds of support that development actors may provide to governments in partner countries. First, supporting governments to make tax systems fairer for women. Second, supporting governments to use tax systems as a tool to enhance gender equality. The guide does not present a comprehensive checklist that captures all required steps in decision-making. Furthermore, any intervention should always consider and be shaped by local contexts. Further assistance on the contents of this guide or tax more broadly can be sought from the Public Finance and Tax Department within FCDO.