Resumen: In recent years, a number of case studies of the circular economy in business have been analysed by academics. However, some areas of research are little explored at the micro level, such as the study of the characteristics of the financial resources applied to investments to introduce circular activities in businesses. Therefore, the main objective of this study is to define the resources applied to circular activities by firms. To describe the influence of financial resources on achieving a more advanced circular economy in business is also an objective of this paper. Using a sample of Spanish companies, we applied a partial least square structural equation model (PLS-SEM) to enhance the knowledge about financial resource management in the framework of the resource-based view. We find that availability of funds, quality of the firm''s own financial resources and public subsidies have a positive effect in stimulating the implementation of circular economy initiatives in businesses. Idioma: Inglés DOI: 10.3390/su11030888 Año: 2019 Publicado en: Sustainability (Switzerland) 11, 3 (2019), 888 [23 pp.] ISSN: 2071-1050 Factor impacto JCR: 2.576 (2019) Categ. JCR: ENVIRONMENTAL SCIENCES rank: 120 / 265 = 0.453 (2019) - Q2 - T2 Categ. JCR: ENVIRONMENTAL STUDIES rank: 53 / 123 = 0.431 (2019) - Q2 - T2 Categ. JCR: GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY rank: 26 / 41 = 0.634 (2019) - Q3 - T2 Categ. JCR: GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY rank: 6 / 8 = 0.75 (2019) - Q3 - T3 Factor impacto SCIMAGO: 0.581 - Energy Engineering and Power Technology (Q2) - Environmental Science (miscellaneous) (Q2) - Renewable Energy, Sustainability and the Environment (Q2) - Management, Monitoring, Policy and Law (Q2) - Geography, Planning and Development (Q2)