| Summary: | This study aims to verify the integration level between the financial and management accounting systems as a result of the convergence process with the international accounting standards and of the effectiveness of controllership in Brazilian companies. A descriptive research was undertaken, based on the application of the questionnaire by Angelkort and Weißenberger (2011) to the 500 Best and Biggest of Revista Exame, issue 2011, using a sample of 32 companies that answered the research. The correlations between the integration level of the financial and management accounting systems and the variables “consistency of financial language”, “quality of services provided” and “degree of influence in decision making”, during the convergence period with the international accounting standards, were positive and moderate. It was also observed that the period before the accounting convergence (2004 till 2007) showed a better integration level of the financial and management accounting systems than the accounting convergence period (2008 till 2011). In conclusion, the accounting convergence process increased the integration level of the financial and management accounting systems in the investigated companies, as well as the effectiveness of controllership, particularly in the consistency of the financial language, in the quality of the services provided and in the influence of the controllers’ services on these companies’ decisions.
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