In the last two decades, openness of public budgeting processes garnered the attention of governments, non-governmental organizations and donors, evidenced by a proliferation of budget transparency and accountability initiatives worldwide. Designed to facilitate productive citizen-government interactions around resource allocation, open budgeting initiatives should contribute to strengthening public trust in political institutions. Using corruption perceptions as a measure of public trust, this study analyzes the relationship between the openness evident in the budgeting processes of 70 countries and corruption perceptions over a five-year period (2006-2010). This study shows that the cumulative effect of the components of transparency, consultation and monitoring may have a stronger impact on perceptions of anti-corruption effectiveness and government corruption than they do as stand-alone activities.