IRS Stats..................

Top 1%

Adjusted Gross Income(AGI)(TY 2012) $434,682
Average tax rate:  22.8%
Group Share of All Income Taxes Paid:  38.1%

Top 10% 

AGI (TY 2012)   $125,195
Average tax rate:  19.2%
Group Share of All Income Taxes Paid:  47.9%


Top 25%

AGI (TY 2012)  $73,354
Average tax Rate:  16.4%
Group Share of All Income Taxes Paid:  86.4%

Top 50%
 
AGI (TY 2012)  $36,055
Average tax Rate:  14.3%
Group Share of All Income Taxes Paid:  97.2%
 
Bottom 50%
 
AGI (TY 2012)  less than $36,055
Average Tax Rate:  3.3%
Group Share of All Income Taxes Paid:  2.8%
 
Return Facts:  (IRS Data Book, FY 2010, Publication 55b)

# of returns AGI $1M or more (TY2010)   388,763

# Individual Refunds (TY 2010)(millions)   142.8

 # of returns examined by the IRS (TY2010)(millions)  1.58  -- (1.1%)
Average recommended Additional Tax:  $20,127

# EITC (Earned Income Tax Credit)(TY 2009) # Returns
w/credit (millions)   24.5
 
Tax Freedom Day and Tax Burden - Selected Years (Source:  Tax Foundation)
NOTE:  Tax Freedom Day is calculated by dividing the official government tally of all taxes collected in each year by the official government tally of all income earned in each year.
 
2014     April 21     30.3%
2013     April 18     29.3%
2012     April 13     28.1%
2011     April 12     27.9% <--(Taxes as a Percentage of Income)
2010     April 9       26.9%
2009     April 8       26.6%
2008     April 16     29.0%
2007     April 24     31.1%
2006     April 24     31.2%
2005     April 21     30.2%
2004     April 15     28.5%  
2003     April 14     28.4%
2002     April 17     29.2%
2000     May 1       33.0%
1990     April 21     30.4%
1980     April 21     30.4%
1970     April 19     29.6% 
1960     April 11     27.7%
1950     March 31  24.6%
1940     March 7    17.9%
1930     Feb 12      11.5%
1920     Feb 13      11.9%