In this presentation I introduce key building blocks for designing a Responsible Impact Indicator for Open Science by allowing researchers to have significant influence on how their impact is represented and communicated. Moving beyond simplistic notions of bibliometric and economic impact, the presentation outlines a number of new approaches to assessing Open Science activities and their consequences for society. Drawing on the current literature, I show that there is considerable room for researchers, universities and funding agencies to establish impact assessment tools based on a wide range of pathways and partnerships while taking into account disciplinary diversity and local context. Taking into account that impact is co-created with stakeholders and practitioners in society, indicators of research outputs are useful for providing cluster analysis and contribution mapping, while less likely to document the resulting societal change.