To: Road Walker who wrote (14661 ) 3/17/2010 4:05:46 PM From: TimF Read Replies (1) | Respond to of 42652 About 17% to about 20% of GDP from 1965 onwards except for a brief jump to almost 21% and a brief decline to about 15 and a half percent. The average has been 18.4%, with the take moving alternatively above and below that average. heritage.org Or just looking at personal income tax large version1.bp.blogspot.com 1. The average percentage of GDP represented by U.S. federal personal income tax revenues from 1946 through 2006 is 8.0%. The percentage share of personal income tax revenues with respect to GDP is normally distributed, with a standard deviation of 0.8%. This defines the typical range for the personal income tax share of GDP of 7.2% to 8.8%. 2. Recessions (shown by the vertical red bands) often coincide with decreased revenue for the federal government from personal income taxes. This is exactly what we should expect to see, as the total level of income earned falls with employment levels during recessions. 3. There are unique circumstances that coincide with percentage shares greater than 8.8%: * In 1968, the Democratic U.S. Congress and President Lyndon Johnson passed a 10% income surtax that took effect in mid-year. Coupled with a spike in inflation, for which personal income taxes were not adjusted to compensate, this tax hike led to outsize income tax collections in that year. * The sustained high inflation of 1978 (7.62%), 1979 (11.22%), 1980 (13.58%) and 1981 (10.35%) led to higher tax collections through bracket creep, as income tax brackets in the U.S. were not adjusted for inflation until 1985 as part of President Ronald Reagan's first term Economic Recovery Tax Act. * Beginning in April 1997, the Dot Com Stock Market Bubble created an excessive number of new millionaires as investors swarmed to participate in Internet and "tech" company initial public offerings or private capital ventures, which in turn, inflated personal income tax collections. Unfortunately, like the vaporware produced by many of the companies that sprang up to exploit the investor buying frenzy, the illusion of prosperity could not be sustained and tax collections crashed with the incomes of the Internet titans in the bursting of the bubble, leading to the recession that followed. 4. Unique circumstances also apply to the one period in which the percentage share of personal income taxes dipped below the lower level of 7.2%. * The recession of 1948 is generally considered to be an "inventory recession." Here, inventories soared as consumers had initially satisfied their pent-up demand for consumer products following the end of World War 2, as companies of the era lacked sufficient feedback to be able to better meter their production levels. The rate of unemployment doubled from 1948's level to 7.9% in October 1949, which in turn, sharply decreased personal income tax collections. * This surplus of inventory came at a time when many large companies completed their full transition from wartime employment levels to "peacetime" levels, which aggravated the employment situation. 5. Years in which tax rate cuts took effect (1964, 1970, 1971, 1982, 1987, 1988, 1991 and 2003) all saw government collections of personal income taxes dip initially, then begin to rise afterward, with the total of personal income tax collections always falling in the range between 7.2% and 8.8% of GDP. politicalcalculations.blogspot.com