The study aimed to investigate the relationship of budgetary slack with participation and emphasis on budget and managers’ information asymmetry. Descriptive research with quantitative approach was conducted through survey research with an accessibility sample of 49 managers of organizational areas of 40 companies that have budget. The survey instrument comprised 23 assertions of a five points in Likert scale, grouped into five blocks. The assertions of budgetary slack and information asymmetry were extracted from Dunk (1993), participation in budget from Milani (1975) and López, Stammerjohan and McNair (2007), and emphasis on budget from Hopwood (1972). For data analysis techniques of descriptive statistics and canonical correlations were used. The survey results show that there is a relationship between budgetary slack and participation and emphasis on budget. There is evidence that managers tend to have a larger slack in the participation of the budget when the emphasis on budget and information asymmetry are high, confirming the understanding of Dunk and Perera (1997). It was concluded that managers surveyed have an intermediate level of budgetary slack, and that this has relation with participation in the budget, which is higher when there is information asymmetry and emphasis on budget. However, the results are not conclusive since not all of them converged with previous studies, which requires further research to explain the creation of budgetary slack by managers.