Tax Changes Taking Effect Jan. 1, 2013 if Congress does not act	Tax Change/Increase (2013 over 2012)
Expiration of the 2001-03 tax cuts (not including estate)	$156 billion
Expiration of the payroll tax holiday	$125 billion
Failure to patch the Alternative Minimum Tax	$88 billion
Expiration of business expensing	$48 billion
Expiration of other “tax extenders”	$40 billion
New PPACA (Obamacare) taxes	$36 billion
Expiration of the 2009 stimulus	$11 billion
Estate tax increase	$10 billion
Total, Tax Increases	$514 billion
Source: Tax Foundation; Congressional Budget Office; Joint Committee on Taxation; Office of Management & Budget.