The Budget of the United States Government volume for a fiscal year contains the Budget Message of the President. It is primarily a political document insofar as it is advocating a particular general message sought to be communicated by the President, rather than the technical detail. It does, however, also include information on the “President’s priorities,” and summary tables.

The President’s Budget, required by law to be submitted to Congress, takes the form of four volumes: the Budget of the U.S. Government, Historical Tables, Analytical Perspectives, and the Appendix. In addition to these main four documents, Supplemental Materials are also transmitted to Congress and made public. Then in July of each year, and update to this budget is sent to Congress, commonly known as the the Mid-Session Review for a fiscal year.