17.1 The Canadian Taxation System
Key Takeaways
Canadian residents are taxed on their worldwide income; non-residents are generally taxed only on Canadian-source income.
In 2026 the federal rates are 14%, 20.5%, 26%, 29% and 33%, with the 14% rate applying to the first $58,523 of taxable income.
A taxpayer's marginal rate applies to the next dollar earned; the average rate is total tax divided by income.
A deduction reduces taxable income and saves tax at the marginal rate; a non-refundable credit reduces tax payable, mostly at the lowest rate.
Individual returns are due April 30 (June 15 if self-employed, with any balance still due April 30).
Taxes take a large share of investment returns, so advisors need to understand how the system works before applying the specific rules for investment income, capital gains and registered plans covered in the following sections.
Who Is Taxed
Canada taxes on the basis of residency, not citizenship. Canadian residents pay tax on their worldwide income. Non-residents pay Canadian tax mainly on Canadian-source income; for example, Canadian dividends and certain interest paid to non-residents are subject to a 25% withholding tax, often reduced by tax treaties.
Both the federal government and the provinces tax income. The Canada Revenue Agency (CRA) collects both federal and provincial personal income tax for every province except Quebec, which runs its own provincial tax system and return.
Sources of Income
The Income Tax Act groups income by source:
- Employment income: salary, wages, bonuses and taxable benefits.
- Business income: profits from self-employment or an unincorporated business.
- Property income: interest, dividends, rents and royalties from investments.
- Taxable capital gains: half of net capital gains on dispositions of capital property.
- Other income: pensions, RRSP and RRIF withdrawals, Employment Insurance and similar amounts.
From Income to Tax Payable
- Total income: add income from all sources.
- Net income: subtract deductions such as RRSP and FHSA contributions, deductible carrying charges (for example, interest on money borrowed to invest) and child care expenses. Net income is used for income-tested benefits.
- Taxable income: subtract further deductions, such as net capital losses carried forward.
- Tax: apply the federal and provincial rate schedules to taxable income.
- Tax payable: subtract non-refundable credits (such as the basic personal amount, CPP and EI contributions, the dividend tax credit, donation credits and the age and pension credits).
Federal Rates for 2026
| Taxable income | Federal rate |
|---|---|
| Up to $58,523 | 14% |
| $58,523 to $117,045 | 20.5% |
| $117,045 to $181,440 | 26% |
| $181,440 to $258,482 | 29% |
| Over $258,482 | 33% |
The lowest federal rate was cut from 15% to 14% (14.5% for 2025 as a whole, 14% from 2026). The federal basic personal amount for 2026 is $16,452. Provincial taxes are added on top, so a top-bracket Ontario resident pays a combined rate of about 53.5% on ordinary income.
Marginal vs. Average Tax Rate
- The marginal tax rate is the rate on the next dollar of income. It is the right rate for evaluating an RRSP deduction or an extra dollar of interest.
- The average tax rate is total tax divided by total income.
Worked Example (federal tax only, 2026)
Maya has taxable income of $90,000 and only the basic personal amount as a credit.
- Tax on the first $58,523:
- Tax on the next $31,477:
- Federal tax before credits: $14,646.01
- Basic personal amount credit:
- Federal tax payable: $12,342.73
Maya's federal marginal rate is 20.5%, but her federal average rate is . A $1,000 RRSP deduction would save her $205 of federal tax (plus provincial tax at her provincial marginal rate).
Deductions vs. Credits
| Deduction | Non-refundable credit | |
|---|---|---|
| What it reduces | Taxable income | Tax payable |
| Value | Amount × marginal rate, so worth more to high earners | Mostly amount × lowest federal rate (plus the provincial credit), the same for most taxpayers |
| Examples | RRSP and FHSA contributions, carrying charges, child care | Basic personal amount, dividend tax credit, donation credit, age credit |
Information Slips Investors Receive
| Slip | What it reports |
|---|---|
| T5 | Interest and dividends paid by corporations and financial institutions |
| T3 | Income allocated by trusts, including mutual fund trusts, most ETFs and income trusts (interest, dividends, capital gains and return of capital) |
| T5008 | Proceeds from the sale or redemption of securities |
| T4RSP / T4RIF | Withdrawals from RRSPs and RRIFs, and the tax withheld |
Investors are responsible for tracking their adjusted cost base. A T5008 shows proceeds, but the cost amount on it may be missing or wrong, particularly for securities transferred between dealers.
Refundable vs. Non-Refundable Credits
A non-refundable credit can reduce tax payable to zero but cannot create a refund; unused amounts are generally lost unless the rules allow them to be transferred or carried forward. A refundable credit or benefit, such as the GST/HST credit or the Canada workers benefit, is paid even if the taxpayer owes no tax.
Filing, Payment and Instalments
- Individuals file by April 30 for the previous year. Self-employed individuals and their spouses have until June 15, but any balance owing is still due April 30.
- Taxpayers must pay instalments if their net tax owing exceeds $3,000 ($1,800 in Quebec) in the current year and in either of the two previous years. This often applies to retirees and investors with little tax withheld at source.
- Interest is charged on late payments and penalties apply to late filing.
A Note on Recent Changes
The federal government proposed in 2024 to raise the capital gains inclusion rate from one-half to two-thirds above a threshold, but it cancelled the increase in March 2025. The inclusion rate remains 50%. The alternative minimum tax was also reformed in 2024 and can affect high-income taxpayers with large capital gains or deductions.
Oliver's taxable income is $100,000. Using the 2026 federal rates, what is his federal marginal tax rate?
14%
20.5%
26%
17.3%
Why is a $1,000 RRSP deduction worth more to a high-income taxpayer than to a low-income taxpayer?
A deduction lowers taxable income, saving tax at the marginal rate
RRSP deductions are refundable credits paid at the 33% rate to all taxpayers
Low-income taxpayers are not allowed to contribute to RRSPs
Deductions reduce tax payable at the lowest federal rate instead
A retiree receives investment and pension income with little tax withheld, and her net tax owing has been about $6,000 a year for several years. She lives in Manitoba. What must she do?
Pay quarterly instalments, as her tax owing exceeds $3,000
File her return by June 15 to avoid any interest charges
Nothing, because instalments apply only to the self-employed
Nothing until she files her return next spring
Sections you finish are checked off in the contents.