The article provides one of the first political economy accounts of the regulation of peer-to-peer (P2P) lending in the United Kingdom, drawing on interviews with platforms representing the vast majority of the market at the beginning of the regulatory process. The article links the regulation of P2P lending with debates about regulatory capture. It challenges conventional understandings of its consequences by showing how the regulation of P2P lending displays characteristics of regulatory capture but appears to have realised several aspects of regulators’ visions for a ‘socially useful finance’, rather than facilitating the kind of rent-seeking behaviour that has been identified in the case of other areas of finance. P2P lending is found t...