Social impact measurement and management is a particularly helpful practice for social economy entities to understand their contribution to society and potentially improve the achievement of their mission. Impact areas that are particularly important for the social economy, such as economic prosperity and employment, social inclusion and well-being and community, are often the hardest to translate into quantitative metrics. Current social impact measurement and management practices are largely shaped by funders and for-profits with limited focus on the social economy. This guide offers a simple, straightforward approach for social economy entities to measure, manage and ultimately maximise their impact, and to prioritise the use of findings for strategic organisational learning and improvement.