A budget is "a statement of probable revenue and expenditure and of financial proposals for the ensuing year as presented to or passed upon by a legislative body." It is customary, in the preparation of a budget for each branch or department of the Government to prepare in detail an estimate of the amount it requires for the period under consideration. This estimate, with those of other departments, are analyzed and amended, usually decreased, by the legislative body. After consideration of all estimates, the final figures are assembled and the total of them represents the amount of money the political body appropriates for its use for the period. There usually are revenues derived from sources other than taxation and these, estimated as closely as possible, are deducted from total of the budget. The remaining amount represents the sum which must be raised by taxation on property within the jurisdiction. In some States there is a tax on personal property. In others, since the enactment of income tax laws so much personal property is exempt that the direct tax falls almost entirely upon real property.