Income Tax and Contributions

Income tax on taxable income

Once total income, deductions, and adjustments have been determined, the next step in the tax calculation process is to determine the income tax on taxable income. This represents the amount of federal and provincial tax payable before the application of non-refundable tax credits and other reductions.

Federal Income Tax

At the federal level, Canada uses a progressive tax rate system, meaning that higher portions of income are taxed at higher marginal rates. Each taxpayer’s taxable income is divided into income brackets, with specific tax rates applied to each bracket. The resulting amounts are added together to determine total basic federal tax.

For example, the 2024 federal tax rates are as follows:

• 15% on the first $55,867 of taxable income
• 20.5% on the next portion, from $55,867 to $111,733
• 26% on the next portion, from $111,733 to $173,205
• 29% on the next portion, from $173,205 to $246,752
• 33% on the amount over $246,752

The total federal tax calculated at these rates forms the base federal tax before applying any non-refundable tax credits (such as the basic personal amount or tuition credit) and other adjustments (such as the Canada Workers Benefit).

Quebec Income Tax

The province of Quebec also applies a progressive tax rate system, but with its own income brackets and rates, administered by Revenu Québec. The 2024 Quebec provincial rates are as follows:

• 14% on the first $51,780 of taxable income
• 19% on the next portion, from $51,780 to $103,545
• 24% on the next portion, from $103,545 to $126,000
• 25.75% on the amount over $126,000

The resulting amount represents the basic provincial tax before applying Quebec non-refundable tax credits, such as the basic personal amount, amount for a person living alone, or tuition credit.

Integration of Federal and Provincial Taxes

Both the federal and Quebec tax systems work independently but are coordinated to reduce overlap and ensure fairness across income levels. The total income tax on taxable income forms the foundation of the overall tax liability, from which various credits, deductions, and benefits are applied to determine the final amount payable or refundable.

Calculating Income Tax Payable on Taxable Income

The income tax payable on taxable income is determined using Work Chart 401. The amount entered on Line 299 is used to calculate the tax owed based on the taxpayer’s taxable income. However, if one of the following situations applies, the amount from Line 401 must be transferred to the appropriate form in order to determine the actual income tax payable:

• The taxpayer is subject to a special tax situation or adjustment requiring a separate calculation; or
• The taxpayer’s income includes specific sources for which tax must be recalculated or adjusted on another schedule or form.

Example :

Marie is a 45-year-old resident of Quebec, and she earned income $50,000.

Answer: