In the [[United States]], Tax Freedom Day for [[2009]] is [[April 13]], for a total average effective tax rate of 28.2 percent of the nation's income. The latest that Tax Freedom Day has occurred was [[May 3]] in [[2000]]. In [[1900]], Tax Freedom Day arrived [[January 22]], for an effective average total tax rate of 5.9 percent of the nation's income. According to the Tax Foundation, the most important factor driving changes in Tax Freedom Day from year to year is growth in incomes, as the progressive structure of the U.S. federal tax system causes taxes as a percentage of income to rise along with inflation.
Tax Freedom Day varies among the 50 U.S. states, as incomes and state & local taxes differ from state to state. In [[2009]], [[Alaska]] had the lowest total tax burden, earning enough to pay all their tax obligations by [[March 23]]. [[Connecticut]] had the heaviest tax burden— Tax Freedom Day there arrived [[April 30]]. [[New Jersey]] had the second heaviest tax burden, having to work until [[April 29]] to pay their total taxes.
According to the Tax Foundation, the following is a list of Tax Freedom Days in the U.S. since 1900:<ref>[http://www.taxfoundation.org/taxdata/show/386.html The Tax Foundation - Tax Freedom Day and Tax Burden, 1900–2008<!-- Bot generated title -->]</ref>
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==Leap year effects==
Since most of the years are not divisible by 4, [[Leap year]]s have one day more, [[29 February]]. This creates some bias in Tax Freedom Days charts. However, this bias is equal to roughly 1/366, which is about 0.27%.
