2021 Ontario Income Tax Calculator

Calculate your 2021 Ontario income tax with this official tax calculator. This tool provides accurate results based on the 2021 tax year rates and brackets. Understand your tax liability, see how deductions affect your refund, and make informed financial decisions.

How to Use This Calculator

Using this calculator is simple:

Enter your total taxable income for the 2021 tax year in the "Taxable Income" field.
Select your filing status (Single, Married, or Separate).
Click "Calculate" to see your estimated tax liability.
Review the results and use the information to plan your tax strategy.

The calculator will show you your total tax owed, the amount you can claim as a refund, and a breakdown of how your income falls into the various tax brackets.

2021 Ontario Tax Brackets

For the 2021 tax year, Ontario uses progressive tax rates based on your filing status. Here are the tax brackets for each status:

Single Filers

Taxable Income	Tax Rate
$0 - $45,142	5.05%
$45,142.01 - $90,287	9.15%
$90,287.01 - $100,645	11.16%
$100,645.01 - $120,000	12.16%
$120,000.01 - $157,510	13.16%
$157,510.01 - $220,000	14.16%
$220,000.01+	16.52%

Married Filers

Taxable Income	Tax Rate
$0 - $90,281	5.05%
$90,281.01 - $180,571	9.15%
$180,571.01 - $201,290	11.16%
$201,290.01 - $240,000	12.16%
$240,000.01 - $315,020	13.16%
$315,020.01 - $440,000	14.16%
$440,000.01+	16.52%

Separate Filers

Taxable Income	Tax Rate
$0 - $45,142	5.05%
$45,142.01 - $90,287	9.15%
$90,287.01 - $100,645	11.16%
$100,645.01 - $120,000	12.16%
$120,000.01 - $157,510	13.16%
$157,510.01 - $220,000	14.16%
$220,000.01+	16.52%

How Ontario Income Tax Works

Ontario's income tax system is progressive, meaning higher-income earners pay higher tax rates. The tax is calculated based on your taxable income, which is your total income minus eligible deductions and credits.

Tax Calculation Formula

The tax owed is calculated by applying the progressive rates to each bracket of your taxable income. For example:

Calculate tax for the first bracket: (Bracket 1 income × Bracket 1 rate)
Calculate tax for the second bracket: (Bracket 2 income × Bracket 2 rate)
Continue this process for all applicable brackets
Sum all bracket taxes to get the total tax owed

Ontario also offers various tax credits and deductions that can reduce your taxable income. Common deductions include:

RRSP contributions
Charitable donations
Medical expenses
Home office expenses
Tuition and education expenses

Tax credits directly reduce the amount of tax you owe, while deductions reduce your taxable income. Understanding these differences is crucial for maximizing your tax refund.

Worked Example

Let's calculate the tax for a single filer with $110,000 in taxable income.

Bracket	Income	Rate	Tax
$0 - $45,142	$45,142	5.05%	$2,273.73
$45,142.01 - $90,287	$45,145	9.15%	$4,118.98
$90,287.01 - $100,645	$10,358	11.16%	$1,155.56
$100,645.01 - $110,000	$9,355	12.16%	$1,131.44
Total Tax			$8,679.66

In this example, the total tax owed is $8,679.66. This means the filer would owe $8,679.66 in income tax for the 2021 tax year.

Frequently Asked Questions

What is the difference between taxable income and gross income?: Taxable income is your gross income minus eligible deductions and credits. Gross income includes all income you earn, while taxable income is what's actually subject to tax.
How do I claim deductions and credits?: You can claim deductions and credits by completing the appropriate sections of your tax return. Some deductions may require supporting documentation. Consult a tax professional if you're unsure about claiming specific items.
What happens if I don't file my taxes?: If you don't file your taxes, you may owe additional penalties and interest. In some cases, you may also be subject to wage garnishment or other collection actions. It's important to file your taxes on time to avoid these consequences.
Can I get a tax refund if I owe less than I paid?: Yes, if you owe less in taxes than you paid (including withheld taxes), you may be eligible for a refund. The amount of your refund will be the difference between what you paid and what you owe.
When is the tax filing deadline for 2021?: The tax filing deadline for 2021 was April 30, 2022. However, you may be eligible for extensions if you need more time to prepare your return.