Policies for financing the united health system: trajectory of advances and challenges considering primary health care as a reference

Introduction: The Unified Health System (SUS) is an achievement of Brazilian society that aims to guarantee free coverage based on the principles of universal access, comprehensive care and equity in care, based on decentralization. Objective: Objectively describe and analyze the public policies for financing the SUS, considering the trajectory of advances and challenges, taking PHC as a reference. Methodology: this is an integrative literature review. In the selection of articles, all were analyzed according to the established evidence of inclusion: original articles, which were published from 2019 to 2022. The chosen exclusion criteria were: review articles, reflection, experience reports, theses, dissertations, monographs. The research was carried out between September and October 2022, in the databases of the Virtual Health Library (VHL), Cumulative Index to Nursing and Allied Health Literature (CINAHL), Joanna Briggs Institute (JBI), US National Library of Medicine (PubMed), SCOPUS, Cochrane and free Google search. Results: A total of 246 studies were identified in the databases and three studies in other sources, of which 141 were excluded due to duplicity, leaving 144 studies. After reading the titles and abstracts, 123 were excluded, with 18 studies being selected for reading in full. After reading them in full, 12 studies were excluded for not responding to the guiding question. Thus, for the final sample, 06 studies were included in this literature review. Conclusion: it is concluded that the resources destined to the financing of the Unified Health System (SUS) are not enough to maintain the universality and completeness of access to the services offered by this system, thus generating a negative impact on the provision of public health services.