The increase is double the 1 percentage-point increase that Quinn repeatedly said was his tax hike plan during the campaign.
http://www.rrstar.com/carousel/x1958453303/Illinois-Governor-Pat-Quinn-defends-income-tax-increase
For residents: The increase means an Illinois resident who now owes $1,000 in state income taxes will pay $1,666 at the new rate. After four years, the rate drops to 3.75 percent, and that same taxpayer will owe $1,333.
Illinois Politics 
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