Tax Calculator 2018 Ontario
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Reviewed by Calculator Editorial Team
Calculate your 2018 Ontario income tax with this professional tax calculator. This tool provides an accurate estimate of your provincial tax liability based on the 2018 tax rates and brackets for Ontario residents.
How to Use This Calculator
Using this tax calculator is simple:
- Enter your total taxable income for 2018 in the designated field.
- Select your filing status (Single, Married, or Other).
- Click the "Calculate" button to compute your tax.
- Review the results, which will show your estimated provincial tax liability.
The calculator uses the 2018 Ontario tax rates and brackets, which were in effect for that year. For the most accurate results, ensure you enter your complete taxable income.
Formula Used
The Ontario tax calculation follows progressive tax brackets. The formula used is:
Provincial Tax = Sum of (Taxable Income × Tax Rate) for each bracket
Where Taxable Income is the portion of income falling into each bracket.
The 2018 Ontario tax brackets were:
| Tax Bracket | Tax Rate |
|---|---|
| $0 - $44,753 | 5.05% |
| $44,753 - $89,507 | 9.15% |
| $89,507 - $150,000 | 11.16% |
| $150,000 - $220,000 | 12.16% |
| Over $220,000 | 13.16% |
Note: This calculator uses the 2018 tax rates. For current tax calculations, use a calculator with updated rates.
Worked Example
Let's calculate the provincial tax for a single filer with $60,000 in taxable income:
- $44,753 × 5.05% = $2,260.91
- ($60,000 - $44,753) × 9.15% = $1,319.22
- Total Provincial Tax = $2,260.91 + $1,319.22 = $3,580.13
This example shows how the progressive tax system applies different rates to different portions of your income.
Frequently Asked Questions
What is included in taxable income?
Taxable income includes all income from employment, business, investments, and other sources, minus eligible deductions and credits.
Are there any deductions or credits not included in this calculator?
This calculator provides an estimate. For precise tax calculations, consult a tax professional or use official government tax software.
No, this calculator uses the 2018 tax rates. For current years, use a calculator with updated tax brackets.
Is this calculator accurate for all filing statuses?
Yes, the calculator accounts for different filing statuses (Single, Married, Other) by applying the appropriate tax brackets.