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Income Tax Calculator Canada Ontario 2018

Reviewed by Calculator Editorial Team

Calculate your 2018 Ontario income tax with our free Canada tax calculator. This tool provides a detailed breakdown of federal and provincial tax liabilities, including deductions and tax credits. The calculator uses the 2018 tax rates and brackets to provide an accurate estimate of your tax obligations.

How the 2018 Ontario Tax Calculator Works

The 2018 Ontario income tax calculator determines your tax liability by applying the federal and provincial tax rates to your taxable income. The process involves several key steps:

  1. Enter your gross income - This is your total earnings before any deductions.
  2. Apply deductions - Subtract eligible expenses from your gross income to calculate taxable income.
  3. Calculate provincial tax - Apply Ontario's tax rates to your taxable income.
  4. Calculate federal tax - Apply Canada's federal tax rates to your taxable income.
  5. Apply tax credits - Subtract any eligible tax credits from your total tax liability.
  6. Determine net tax - Subtract provincial and federal taxes to find your total tax obligation.

Formula: Net Tax = (Taxable Income × Provincial Tax Rate) + (Taxable Income × Federal Tax Rate) - Tax Credits

The calculator uses the 2018 tax rates and brackets for both federal and provincial taxes. It also includes common deductions and tax credits that were available in 2018.

2018 Ontario Tax Brackets

Ontario's 2018 tax brackets were structured as follows:

Taxable Income Provincial Tax Rate
$0 - $43,906 5.05%
$43,907 - $87,813 9.15%
$87,814 - $150,000 11.16%
$150,001 - $220,000 12.16%
$220,001+ 13.16%

Federal tax rates for 2018 were:

Taxable Income Federal Tax Rate
$0 - $47,630 15%
$47,631 - $95,259 20.5%
$95,260 - $147,667 26%
$147,668 - $210,371 29%
$210,372+ 33%

Note: These rates are for 2018 only. Tax rates and brackets change each year, so this calculator is specific to the 2018 tax year.

Federal Tax in Ontario

In addition to Ontario's provincial tax, residents also pay federal income tax. The federal tax system in Ontario operates on a progressive scale, meaning higher income levels are taxed at higher rates. The federal tax rates for 2018 were:

  • 15% on the first $47,630 of taxable income
  • 20.5% on the next $47,629 ($47,631 to $95,259)
  • 26% on the next $52,408 ($95,260 to $147,667)
  • 29% on the next $62,704 ($147,668 to $210,371)
  • 33% on taxable income over $210,371

The federal tax system also includes various deductions and credits that can reduce your tax liability. Common federal deductions include:

  • Medical expenses
  • Donations to registered charities
  • Tuition and education amounts
  • RRSP contributions

Federal tax credits, such as the Canada Child Benefit and the Canada Pension Plan contribution, can also reduce your tax burden.

Deductions and Tax Credits

Both Ontario and federal governments offer various deductions and tax credits that can reduce your tax liability. Common deductions include:

Ontario Deductions

  • RRSP contributions
  • Union dues
  • Educational expenses
  • Medical expenses
  • Donations to registered charities

Federal Deductions

  • RRSP contributions
  • Tuition and education amounts
  • Medical expenses
  • Donations to registered charities
  • Home office expenses

Tax Credits

Tax credits directly reduce your tax liability dollar-for-dollar. Common tax credits include:

  • Canada Child Benefit
  • Canada Pension Plan contribution
  • Provincial childcare expenses
  • Home buyers' amount
  • Lifetime learning credits

Note: The availability and amounts of deductions and credits can vary based on your specific circumstances. This calculator provides estimates based on common scenarios.

Example Calculation

Let's walk through an example calculation for a single individual with a gross income of $60,000 in 2018.

  1. Gross Income: $60,000
  2. Deductions: $10,000 (RRSP contributions)
  3. Taxable Income: $60,000 - $10,000 = $50,000
  4. Provincial Tax: $50,000 × 9.15% = $4,575
  5. Federal Tax: $50,000 × 20.5% = $10,250
  6. Total Tax Before Credits: $4,575 + $10,250 = $14,825
  7. Tax Credits: $2,000 (Canada Child Benefit)
  8. Net Tax: $14,825 - $2,000 = $12,825

Result: For a $60,000 income with $10,000 in RRSP contributions and $2,000 in tax credits, the estimated 2018 Ontario income tax would be $12,825.

This example shows how deductions and credits can significantly impact your final tax liability. The actual amount you owe may vary based on your specific financial situation.

Frequently Asked Questions

How do I use the Ontario income tax calculator?

Enter your gross income, select your filing status, and enter any applicable deductions and tax credits. The calculator will then compute your estimated provincial and federal tax liabilities.

Are the tax rates in this calculator accurate for 2018?

Yes, this calculator uses the official 2018 tax rates and brackets for both Ontario and federal taxes. The rates are based on the Canada Revenue Agency's 2018 tax tables.

What deductions are available in 2018?

Common deductions in 2018 included RRSP contributions, union dues, educational expenses, medical expenses, and donations to registered charities. The calculator includes these common deductions.

How do tax credits differ from deductions?

Tax credits directly reduce your tax liability dollar-for-dollar, while deductions reduce your taxable income. For example, a $1,000 tax credit would reduce your tax bill by $1,000, while a $1,000 deduction would reduce your taxable income by $1,000.

Can I use this calculator for self-employed income?

Yes, you can use this calculator for self-employed income. However, you may need to adjust for additional deductions and credits that apply specifically to self-employed individuals.