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In 1998, only 3.4 percent of tax filers with positive small business income had adjusted gross incomes above $200,000. (The vast majority of taxpayers subject to the 36 percent or 39.6 percent tax rates have incomes above $200,000.)
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http://www.cbpp.org/5-3-01tax2.htmquote----------
Similarly, the President has repeatedly invoked the benefits his tax cuts, and especially his proposal to reduce the top income tax rate, provide to small businesses. Yet, according to Treasury Department data, the top rate reduction benefits only two percent of small business owners. In other words, 98 percent of small business owners are not in the top tax bracket. In fact, many more such individuals receive the Earned Income Tax Credit for lower-income working families than are in the top bracket.
Furthermore, the Administration’s definition of “small business owner” includes anyone who earns even one dollar of income that is classified as business income under the tax code. Under this definition, one need not actually run or own a major share of a business to be classified a business owner. This definition includes wealthy individuals whose primary income does not come from small business ownership or operation but who do some consulting or invest in real estate on the side. Many of those in the top tax bracket are better characterized as very-high-income individuals, such as corporate executives, with some business investments.
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http://www.cbpp.org/4-14-04tax-sum.htm