Marginal Tax Rates in Ontario for 2026

How Ontario's Marginal Tax System Works

Canada uses a progressive marginal tax rate system where income is divided into segments called tax brackets. Each bracket is taxed at a specific rate, and the rate increases as income rises into higher brackets. In Ontario, residents pay both federal and provincial income tax, with each level of government setting its own brackets and rates. Your total taxable income is first subject to federal tax brackets, and then the same income is subject to Ontario's provincial brackets. The marginal tax rate is the rate applied to the last dollar earned within a bracket, not to your entire income. This structure ensures that those with higher incomes contribute a larger share, while lower-income earners face a smaller tax burden on their initial earnings.

For example, if your taxable income increases and pushes you into a higher Ontario tax bracket, only the portion of income within that new bracket is taxed at the higher rate. The income in the lower brackets continues to be taxed at their respective lower rates. This prevents an overall reduction in take-home pay when receiving a raise. The combined effect of federal and provincial rates results in an integrated marginal tax rate that Ontario residents must calculate. The provincial tax is calculated separately on the federal return using Ontario's specific brackets and is collected by the federal government on behalf of the province, except in Quebec which has a separate system.

Ontario Provincial Tax Brackets and Rates for 2026

Ontario has five provincial income tax brackets for the 2026 tax year. The brackets and corresponding marginal tax rates are applied to taxable income after federal tax calculations. The specific brackets are adjusted annually for inflation using an indexation factor, which for 2026 is 1.019, representing a 1.9% increase. It is important to note that not all bracket thresholds are indexed. The amounts at $150,000 and $220,000 are fixed and do not increase with inflation. The rates begin at 5.05% for the lowest bracket and rise to 13.16% for the highest bracket.

The following table outlines the Ontario provincial tax brackets and marginal rates for 2026 based on confirmed Canada Revenue Agency information. These rates are applied on top of the federal income tax rates. For 2026, the federal government has enacted a reduction in its lowest marginal rate to 14%, with brackets also indexed by a factor of 1.02. When combined, the federal and Ontario rates produce a total marginal tax rate that can range from 20.05% to 53.53% depending on the income level and type of income such as regular earnings, dividends, or capital gains.

Calculating Your Tax in Ontario

Calculating your total income tax liability in Ontario involves several distinct steps, as you must account for both federal and provincial systems. The process begins with determining your net income by subtracting allowable deductions from your total income from all sources. This includes employment income, self-employment earnings, investment income, and other taxable amounts. From net income, you then calculate your taxable income by applying additional deductions such as RRSP contributions or child care expenses. It is this taxable income figure that is used in the federal and provincial tax bracket calculations.

First, apply the federal tax brackets and rates to your taxable income. Second, apply the Ontario provincial brackets and rates from the table above to the same taxable income amount. Third, subtract non-refundable tax credits from the calculated tax for each level. These credits include the basic personal amount, which for Ontario in 2025 is $12,747, and for the federal government is $16,129. Each credit reduces its respective provincial or federal tax payable. Finally, combine the resulting federal and provincial tax amounts, along with Canada Pension Plan contributions and Employment Insurance premiums, to determine your total tax liability. The result subtracted from your total income provides an estimate of your after-tax income.

• Determine total income from all sources.
• Calculate net income by subtracting deductions like RRSP contributions or moving expenses.
• Establish taxable income by applying further deductions such as child care credits.
• Apply federal tax brackets and rates to taxable income.
• Apply Ontario provincial tax brackets and rates to taxable income.
• Subtract federal and provincial non-refundable tax credits from respective tax amounts.
• Add CPP and EI premiums to the combined federal and provincial tax total.
• Subtract the total tax and premium amount from total income to find after-tax income.

Key Deductions and Credits Affecting Taxable Income

Several deductions and credits can reduce your taxable income or the tax you owe in Ontario. Deductions directly lower the amount of income subject to tax, while credits reduce the amount of tax payable. Common deductions include contributions to a Registered Retirement Savings Plan, which are subtracted from your total income to arrive at taxable income. Other deductions can include child care expenses, moving expenses for work or school, and support payments made. It is important to note that mortgage interest is generally only deductible in Canada when the borrowed funds are used to buy or improve rental property, not for a primary residence.

Non-refundable tax credits provide a reduction in tax payable based on a percentage of the credit amount. The basic personal amount is the most significant credit, ensuring no tax is paid on income up to a threshold. Other notable credits include the Canada employment amount, and credits for public transit passes, medical expenses, and charitable donations. Charitable donations can generate both federal and provincial credits, reducing your overall tax liability. Student loan interest is also eligible for a tax credit, as are certain mental health treatment costs like therapy sessions with an occupational therapist. These credits are calculated by applying the lowest marginal tax rate, 5.05% for Ontario, to the eligible amount and subtracting that from your provincial tax payable, and they are a key component of year-end tax planning.

Special Considerations for Different Types of Income

Different types of income are taxed at different effective rates in Ontario, which influences your marginal tax rate calculation. Employment income and business income are fully taxable at the combined federal and provincial marginal rates. Investment income such as interest from savings accounts is also fully taxable. Dividend income from Canadian corporations receives special treatment through the dividend tax credit, which accounts for corporate taxes already paid.

Eligible dividends from Canadian public corporations are grossed-up by 38% for 2026, meaning you add this percentage to the actual dividend received before calculating tax. The dividend tax credit is then applied to offset the tax on the grossed-up amount, resulting in a lower effective tax rate. Non-eligible dividends have a different gross-up rate and credit. For individuals subject to the highest marginal rates, certain passive income received by minor children or shifted to adult family members through private corporations may be subject to tax at the top combined federal and provincial marginal rate, which can be up to 55%. This is often referred to as the kiddie tax or split-income rules, and personal tax credits generally cannot be used to reduce this specific tax, making it a critical consideration for family income planning.

Common Mistakes and Important Rules

One frequent error is misunderstanding how marginal tax rates work, leading to the belief that entering a higher tax bracket causes all income to be taxed at the higher rate. As explained, only the income within the new bracket is taxed at the higher marginal rate. Another common mistake is failing to account for both federal and provincial taxes when estimating liabilities, as the combined rate is what ultimately affects your finances. Residents must also remember that provincial tax is not deductible when calculating federal taxable income, and vice versa. The two systems are separate but calculated concurrently on your tax return.

Other important rules involve the Alternative Minimum Tax and residency status. The AMT is a parallel tax calculation that limits the use of certain deductions and credits. If your AMT liability is greater than your regular tax, you pay the AMT instead and can carry forward a credit for the excess to apply in future years. For residency, individuals living in Canada for only part of a year are taxable on worldwide income only for the period of residence. Non-residents are subject to Canadian tax only on income from employment or business in Canada and on capital gains from taxable Canadian property. Relief from double taxation for foreign income is provided through tax treaties and foreign tax credits, which must be properly claimed on the return.

• Believing a higher bracket taxes all income at the new rate.
• Forgetting to calculate both federal and provincial taxes.
• Overlooking that provincial tax is not deductible for federal purposes.
• Neglecting to index bracket thresholds when estimating future taxes.
• Misunderstanding the treatment of dividend income and capital gains.
• Failing to consider the Alternative Minimum Tax if using many deductions.
• Not reporting worldwide income if a resident for the full year.

Frequently asked questions

Sources and further reading

1. Ontario 2025 and 2026 Tax Rates & Tax Brackets taxtips.ca
2. 2026 income tax calculator for Ontario wealthsimple.com
3. Canada, Individual, Taxes on personal income taxsummaries.pwc.com
4. 2025-26 Ontario Income Tax Calculator, TurboTax® Canada turbotax.intuit.ca
5. How do marginal tax rates work in Canada? - TD Stories stories.td.com

This article explains how things work and is not financial, tax or legal advice. Rules, limits and rates change, so check the current figures with the Canada Revenue Agency, your province or your financial institution before you act.