Ontario Tax 2021 Calculator

Calculate your Ontario provincial taxes for 2021 with this free online calculator. This tool helps you determine your estimated tax liability based on your income and deductions, using the 2021 tax rates and brackets.

How to Use This Calculator

Using this Ontario Tax 2021 Calculator is simple:

Enter your total taxable income for 2021 in the first field.
Select your filing status (Single, Married, or Other).
Enter any applicable deductions or credits in the third field.
Click the "Calculate" button to see your estimated Ontario provincial taxes.

The calculator will display your total tax liability, the amount of tax paid at each marginal rate, and your effective tax rate.

Formula Used

The Ontario tax calculation uses progressive tax brackets. The formula is:

Ontario Tax = Σ (Taxable Income × Marginal Rate) for each tax bracket

Where:

Taxable Income = Total Income - Deductions
Marginal Rate = The tax rate applied to the portion of income in each bracket

The calculator applies the 2021 Ontario tax rates and brackets, which are different for single, married, and other filing statuses.

Worked Example

Let's calculate the Ontario tax for a single filer with $50,000 taxable income:

First $44,753 at 5.05% = $2,260.98
Next $5,247 at 9.15% = $478.31
Remaining $5,950 at 11.16% = $663.70

Total Ontario Tax = $2,260.98 + $478.31 + $663.70 = $3,402.99

Effective Tax Rate = ($3,402.99 / $50,000) × 100 = 6.81%

Ontario Tax Rates 2021

The 2021 Ontario tax rates and brackets are as follows:

Filing Status	Tax Bracket	Marginal Rate
Single	$0 - $44,753	5.05%
	$44,754 - $89,506	9.15%
	$89,507 - $150,000	11.16%
	$150,001+	13.16%
Married	$0 - $89,506	5.05%
	$89,507 - $179,012	9.15%
	$179,013 - $220,000	11.16%
	$220,001+	13.16%

Note: These rates are for 2021 only. Tax laws and rates change each year.

Frequently Asked Questions

What is the Ontario tax rate for 2021?: The Ontario tax rate for 2021 ranges from 5.05% to 13.16%, depending on your income and filing status.
How do I calculate my Ontario tax?: Use this calculator by entering your taxable income, selecting your filing status, and entering any deductions or credits.
Are Ontario tax rates progressive?: Yes, Ontario uses progressive tax rates, meaning higher incomes are taxed at higher rates.
What is the difference between federal and provincial taxes?: Federal taxes are applied to your entire income, while provincial taxes (like Ontario) are applied to your provincial taxable income.
When do Ontario tax rates change?: Ontario tax rates are typically updated annually by the provincial government.