2004/2011-The tables on this page are provided as a reference for taxpayers and tax preparers who are estimating the amount of tax due. Ohio's income tax rates have been gradually falling since 2005, when the 126th General Assembly enacted House Bill 66, scheduling five annual across-the-board income tax rate reductions of 4.2 percent each. In 2009, state law was revised to temporarily postpone the fifth and final income tax rate reduction. As a result, the income tax rates used for 2008 will also apply to the 2009 and 2010 taxable years. The fifth and final rate reduction was enacted in tax year 2011. Starting in 2010, the state tax commissioner is required to adjust each bracket annually for inflation, per Ohio Revised Code section 574...