Corporate social responsibility is an initiative that has been touted as a possible remedy for the ills of globalization that hinder the realization of sustainable development-that is, inequities in wealth, environmental degradation, and unfair labor practices that are endemic of globalization. Specifically this study examines the relationship of sustainable business with Personal, Organisational, Social, Environmental sustainability which further depends on internal and external CSR practices.Factor Analysis Technique was used to assess the dimensionality and uniqueness of the variable. By the use of multiple regression analysis, the proposed model was tested on middle level managers within the IT sector in Noida.Results showed that there is a significant relationship between sustainable business and types of sustainability and internal and external CSR practices are significantly related with four types of sustainability. So, a well-implemented and strongly enforced CSR policy is a key to sustainable business.