Abstract: This study aims to analyze about the influence of allocation of a plan against implementation accounting information system to PT Haros Farma. With the appropriation of effective power, so will increase the success of the implementation of accounting information system but when resources not allocated with effective, so, the implementation of accounting information system will not run well. Research methodology used in a descriptive analysis and verificative. By using the method research would known a significant relation between variables order produce a conclusion that will clarify a picture of the treatment object. The data collected were analyzed using regression analysis simple. The result of research is resource allocation influential in significance 5% of the implementation of accounting information system of 78.4% while the rest of 21.6% influenced by other factors such as uncertainty environment, business strategy and knowledge users.