This paper investigates the relationship between business barriers and the degree of internationalization of manufacturing enterprises in Peru. Using a panel data survey of 869 companies over the year 2006, 2010 and 2017, with Tobit regression model, the empirical results show that competition and transportation have negative impacts on internationalization process, whilst factors like international certification, tax administration, custom clearance and bribery cost have positive impacts. In addition, the factors that belong to individual managers affecting the internationalization of firms are not statistically significant. The study will give policy makers more information to support Vietnamese businesses in the process of internationalization.