Abstract
Spain is one of the most active European countries in the open access (OA) movement. Although the gold route has scarcely been used, the green route has been intensively implemented through fulfilment of European and national mandates and the development of institutional policies. Plan S is becoming a disruptive element in the context of scientific communication, and Spain’s possible adherence to Plan S could imply technical challenges in journals and repositories, additional costs that are difficult to estimate, or refusal to accept the Plan on the part of researchers (based on the loss of freedom to choose the journal in which to publish). However, the implementation of Plan S in Spain would also lead to greater transparency in APC spending, a reduction in publishing in predatory journals, greater visibility and impact for journals that are only published OA, improvements in OA monitoring and a change in the evaluation model for researchers from one based on the impact factor to one based on DORA recommendations.