The dynamic environment that firms face forces them to respond quickly and flexibly to market changes in order to survive the competition. Proof of this is the call from different political, economic, social and academic institutions to companies to increase their efforts in the social and environmental fields, through the development of three essential pillars: economic, social and environmental (Triple Bottom Line). Based on these ideas and with the purpose of linking the management of sustainable intangible assets with the performance of the firm, in this research we define sustainable intangible capital as the set of knowledge that a company can take advantage of to carry out an economic, social and environmental management that allows it to achieve competitive advantages. Although in recent times intangible assets are considered the basic factor of production, it is necessary to show that the mere possession of them will not guarantee a superior performance. For that reason, the objective of this work is to analyse the dynamic role that the corporate social responsibility and the strategic knowledge management exert in the relationship between sustainable intellectual capital and firm performance. To analyse the objective proposed, three hypotheses were proposed, which were tested using a quantitative methodology based on PLS on 120 Spanish hotels with three or more stars. Findings do not support H1, which indicates that sustainable intangible capital does not influence hotel’s performance in a significant way. On the contrary, the mediating hypotheses H2 and H3 have been supported, showing that corporate social responsibility and strategic knowledge management exert as mediator dynamic capabilities and a multiple mediation effect exists. This means that those capabilities create the values, the philosophy and the necessary foundations for sustainable intangible capital to influence on performance from a significant point of view. With this research theoretical and practical contributions are made.