The goal of this technical paper is to present in a transparent way a detailed description of the DART-BIO model – the bioeconomy and land use version of the DART model. Key feature of the DART-BIO model is the explicit representation of the vegetable oil industry and the biofuel sector. The paper describes the construction and aggregation of the database used for the DART-BIO model. Further the theoretical structure of the model is elaborated. Thereby, crucial assumptions, elasticities and parameters embedded in the model are presented.