Given the influence of SMEs in the creation of wealth and as a strategic sector for the development of the country, they must implement financial planning to develop their competitive advantage, visualizing business opportunities with adequate management and analysis of information, together with strategic objectives to know future scenarios, reduce exposure to financial risk contributing to efficient decision making. The objective of this research was to evaluate financial management in SMEs in the manufacturing industrial sector of Ciudad Nezahualcóyotl in the State of Mexico, to know the factors that contribute to their competitive advantage and generate a proposal for an adequate and accessible Financial Planning model, which allows them to visualize their internal potential contributing to their development and competitiveness, since their permanence and growth would improve the employment, poverty and competitiveness indices that the region needs. It is a mixed investigation that used the qualitative method in the exploration and non-experimental documentary and quantitative investigation stage, applying a questionnaire to collect information on 47 indicators of nine variables related to financial planning, of which 23 indicators are valued as unsatisfactory in its performance.