This research analyzes the relationship between financing and business development of the MYPES (Micro and Small Businesses) residing in the industrial zone of Huaycán, a city located in the Ate-Vitarte district, Lima. The study is descriptive correlational type with a non-experimental and cross-sectional design. The study population consisted of 60 MYPES in the mentioned place. In order to measure internal financing, a questionnaire prepared by Márquez (2007) was used. To measure external financing, a questionnaire created by Cornejo and Galicia (2010) was used; The business development questionnaire was prepared by García (2003). Its reliability was verified by Cronbach's alpha, which obtained 0.95 for financing and 0.840 for business development. The Spearman's Rho results ρ = 0.329, p = 0.036 allow us to conclude that financing has a significant direct relationship on business development. Therefore, the more financing the MYPES will have, the more business development will allow them to perform optimally in their activities that involve a large part of the population, allowing them to have a business and employment opportunity, thus improving the economy of their families, in order to promote poverty reduction in the country.