In this newsletter we articulate some of the principles, practices, achievements and questions surrounding Indigenous impact assessment (Cultural Impact Assessment). We build on the strengthening international impetus in impact assessment practice to develop further integrity, respect and reciprocity in relationships with Indigenous groups. To date, there has been little collective discussion as to what it actually means (or could mean) to practice Indigenous impact assessment in Aotearoa New Zealand. Furthermore, there has been little dialogue about the potential for non-Indigenous decision-making bodies to enhance the opportunity for Indigenous impact assessment based on Indigenous territorial rights and self-determination. So here we open up that conversation and consider the implications for developing a decolonising agenda in impact assessment. Commentaries from Indigenous contributors to impact assessment in Aotearoa New Zealand follow – contributors writing of their experience as manawhenua, CIA practitioner, commissioner, and academic.