This chapter explores the technical components of developing a grant budget and introduces the basic government circulars that frame budget management. Federal grant budgets are governed by the Office of Management and Budget, and regulations are specified in three circulars, which can be made available through an institution’s research administration office. Although it is not necessary to study in depth the content of these circulars, it is helpful to have a working knowledge of their purpose and content and to have them easily available for reference. In addition, the grants administrator, fiscal office, or office of research administration can be consulted with regard to the circulars’ content and updates, as well as the rules and regulations guiding all grant budgets from their development to their monitoring and management. Working with a grants administrator from the start of the grantwriting process is essential, and he or she should be a member of the grant team for accurate and effective budgeting.