This study develops a systematic review of 29 studies published between 2018 and 2025, with the aim of analyzing the impact of financial decisions on microenterprises. Articles with a quantitative, qualitative and mixed approach were compiled, mainly from Peru, Colombia, Ecuador and Mexico, covering various economic sectors. The results show that variables such as financial planning, cost control, access to credit and the use of financial indicators have a direct and significant influence on business decision-making. Among the most frequent impacts are the improvement in profitability, increased liquidity, strengthening competitiveness and increasing business sustainability. Likewise, positive effects on productivity, investment and business satisfaction were identified. Risks such as over-indebtedness are also recognized, when there is no adequate management. Evidence suggests that data-driven financial decision-making and technical capabilities contribute to improving the overall performance of microenterprises. It is recommended to promote financial education, the use of technology and the development of specific support policies to strengthen financial management in this type of organization.