The paper provides an overview of studies on the social and private costs of retail payments conducted since 2013 in nine EU countries and collates the results obtained. Social costs of retail payments are the overall costs resulting from providing payment services to society and deriving from the resource costs incurred by all parties along the payment chain. Private costs, in contrast, are the costs incurred by the individual stakeholder only, such as banks and other payment intermediaries. Understanding the social and private costs of retail payments is crucial for assessing the impact of the rapidly changing retail payment landscape, such as the shift to electronic payments, and for designing strategies for moving towards cost efficient retail payments.