The objective of this research is to contribute to the scientific debate on “complementary monetary systems” (CMSs), what strategies may be the best for allowing the implementation of a CMS in a territory and that optimise the potential that it seems to have to strengthen processes of sustainable local development and urban resilience. For this, the Strengths, Weaknesses, Opportunities and Threats-Analytic Hierarchy Process methodology (SWOT-AHP) has been used, which has allowed us to identify four strategies: (1) build a social, economic and political consensus, (2) create a community observatory for “complementary social monetary systems” (CSMSs), (3) define communication tools for raising awareness and education in ethical finance and (4) promote the alignment of the CSMS with sustainable local development strategies. These strategies have been formulated so that that they can be implemented by any entity, public or private, and for any of the types of CMS that may be part of a CSMS.