Income Tax Ontario 2017 Calculator

Calculate your Ontario income tax liability for 2017 using this free online calculator. Simply enter your taxable income and deductions, and we'll show you your estimated tax owed, including provincial and federal tax components.

How to Use This Calculator

Using this Ontario income tax calculator is simple:

Enter your total taxable income for 2017 in the first field
Select your filing status (Single, Married, or Other)
Add any applicable deductions in the third field
Click "Calculate" to see your estimated tax liability

The calculator will display your total tax owed, broken down by provincial and federal components, as well as your effective tax rate.

Ontario Income Tax Rates (2017)

For 2017, Ontario's income tax rates were progressive, meaning higher income brackets pay higher tax rates. The rates for 2017 were:

Taxable Income	Provincial Rate	Federal Rate
$0 - $43,906	5.05%	15%
$43,907 - $87,813	9.15%	20.5%
$87,814 - $150,000	11.16%	26%
$150,001 - $220,000	12.16%	29%
$220,001+	13.16%	33%

Note

These rates are for 2017 only. Tax rates change annually and may differ for different filing statuses. Always consult the Canada Revenue Agency (CRA) for the most current information.

Common Deductions

Several deductions can reduce your taxable income and lower your tax liability. Common deductions in Ontario include:

RRSP contributions (up to a maximum limit)
Medical expenses (if they exceed 3% of your net income)
Donations to registered charities
Home office expenses
Moving expenses (if you changed residences)

Enter these deductions in the calculator to get a more accurate estimate of your tax liability.

Worked Examples

Example 1: Single filer with $50,000 taxable income

For a single filer with $50,000 taxable income:

First $43,906 taxed at 5.05% provincial + 15% federal = $2,195 + $6,585 = $8,780
Remaining $6,094 taxed at 9.15% provincial + 20.5% federal = $555 + $1,247 = $1,802
Total tax = $8,780 + $1,802 = $10,582

Example 2: Married couple with $120,000 taxable income

For a married couple with $120,000 taxable income:

First $43,906 taxed at 5.05% provincial + 15% federal = $2,195 + $6,585 = $8,780
Next $43,907 taxed at 9.15% provincial + 20.5% federal = $3,996 + $8,999 = $12,995
Remaining $32,187 taxed at 11.16% provincial + 26% federal = $3,582 + $8,344 = $11,926
Total tax = $8,780 + $12,995 + $11,926 = $33,701

Formula Used

Tax = Σ (Taxable Income × Provincial Rate) + Σ (Taxable Income × Federal Rate)

Where Σ represents the sum of taxable income in each bracket multiplied by the corresponding tax rate.

Frequently Asked Questions

How do I know if I owe Ontario income tax?

You owe Ontario income tax if you have taxable income from employment, self-employment, or other sources. The tax is calculated based on your filing status and taxable income after deductions.

What is the difference between taxable income and gross income?

Gross income is all income you receive before any deductions. Taxable income is gross income minus eligible deductions, exemptions, and credits. Only taxable income is subject to income tax.

Can I deduct my RRSP contributions from my taxable income?

Yes, RRSP contributions are deductible from your taxable income, but they also provide tax-deferred growth and tax-free withdrawals in retirement. The maximum contribution limit for 2017 was $25,730 for individuals and $51,460 for couples.

How do I file my Ontario income tax return?

You can file your Ontario income tax return online through the Canada Revenue Agency (CRA) website, by mail, or at a CRA office. The deadline for filing is typically April 30 of the year following the tax year.