This paper investigates the influence of Environmental, Social, and Governance (ESG) principles on corporate financial management within micro- and small enterprises. The primary objective is to assess the impact of ESG integration on the financial performance of these firms. The study commences with a comprehensive review of ESG reporting, underscoring its significance in evaluating corporate performance and ensuring long-term sustainability. A mixed-method approach, incorporating both quantitative and qualitative analyses, is employed to examine data from 200 Slovak companies across various industries. The study explores the correlation between ESG assessments and financial metrics, including Return on Assets (ROA) and Return on Sales (ROS). The results indicate an ambiguous relationship between ESG scores and financial performance, implying that while ESG adoption is vital for sustainability, its short-term financial advantages may be limited. Additionally, the paper addresses the challenges encountered by Slovak enterprises in ESG reporting, such as insufficient awareness and the perceived financial burden of compliance. Recommendations include broadening the dataset and extending the temporal scope of the analysis for more robust insights. The paper also advocates for heightened awareness of ESG principles through educational programs and the enforcement of EU regulations on ESG reporting. These findings aim to contribute both to academic discourse and the practical application of ESG principles, thereby fostering sustainable business practices in Slovakia.