The Ontario basic income tax rate is 12%, effective July 1, 2010 (it was previously 14%). It will be reduced as follows:
The tax is prorated based on the number of days in the year when the tax year straddles these dates.
The Ontario small business deduction reduces Ontario basic income tax by 8.5%, resulting in a lower tax rate of 5.5%. This tax rate was reduced to 4.5% effective July 1, 2010.
The harmonized return will include the following Ontario corporation taxes:
The Ontario transitional tax debits and credits provide a transition from the Corporations Tax Act (Ontario) for corporations with different income tax attributes for federal and Ontario purposes.
Ontario offers different tax credits. Details of each credit can be found in the following pages and their associated schedules: