Corporate Tax Rate Ontario Calculator
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Reviewed by Calculator Editorial Team
How the Corporate Tax Rate Calculator Works
Ontario's corporate tax system is complex, involving both provincial and federal taxes. This calculator helps you determine your effective corporate tax rate by accounting for:
- Provincial corporate tax rate (currently 12.25%)
- Federal corporate tax rate (currently 15%)
- Small business deduction (up to $100,000)
- Capital cost allowance (CCA) deductions
- Other tax credits and deductions
The calculator provides an estimate of your effective tax rate based on your taxable income and available deductions. Remember that this is an estimate and actual tax liability may vary based on your specific circumstances.
Formula Used
Effective Corporate Tax Rate =
(Federal Tax + Provincial Tax - Deductions) / Taxable Income × 100%
Where:
- Federal Tax = Taxable Income × 15%
- Provincial Tax = Taxable Income × 12.25%
- Deductions include Small Business Deduction and Capital Cost Allowance
Worked Example
Let's calculate the effective corporate tax rate for a company with $500,000 taxable income, $80,000 small business deduction, and $50,000 CCA deduction.
Federal Tax: $500,000 × 15% = $75,000
Provincial Tax: $500,000 × 12.25% = $61,250
Total Tax Before Deductions: $75,000 + $61,250 = $136,250
Total Deductions: $80,000 (Small Business) + $50,000 (CCA) = $130,000
Tax After Deductions: $136,250 - $130,000 = $6,250
Effective Tax Rate: ($6,250 / $500,000) × 100% = 1.25%
This example shows how deductions can significantly reduce your effective tax rate.
Ontario vs. Other Provinces
Ontario's corporate tax rates compare as follows:
| Province | Provincial Rate | Federal Rate | Combined Rate (No Deductions) |
|---|---|---|---|
| Ontario | 12.25% | 15% | 27.25% |
| British Columbia | 12.25% | 15% | 27.25% |
| Alberta | 10% | 15% | 25% |
| Quebec | 20% | 15% | 35% |
Note: These are base rates before deductions. Actual rates may vary based on deductions and credits.
Frequently Asked Questions
What is the current corporate tax rate in Ontario?
As of 2023, Ontario's provincial corporate tax rate is 12.25%, while the federal rate is 15%. The combined rate is 27.25% before deductions.
How do deductions affect my corporate tax rate?
Deductions like the Small Business Deduction and Capital Cost Allowance can significantly reduce your effective tax rate by lowering your taxable income.
Are there any tax credits available for Ontario corporations?
Yes, Ontario offers various tax credits including the Small Business Deduction, Capital Cost Allowance, and other industry-specific credits.