Meta-analyses of interventions such as parenting, stimulation, and early childhood education have reported consistent medium-to-high effect sizes on early childhood development (ECD) and early learning outcomes. However, few effective interventions promoting ECD have achieved scale. In order to increase the access to effective or high-quality services, greater focus on implementation research of interventions promoting ECD is necessary. In this paper, we describe the development of reporting guidelines for implementation research of nurturing care interventions designed to promote ECD following an expert consensus-building process. The goal of these guidelines is to support a transparent and standard reporting of implementation evidence on nurturing care interventions designed to promote early childhood development.