How personal income tax works in Canada

Personal income tax in Canada is a key part of your legal and financial life as a newcomer, whether you are a permanent resident, international student, temporary worker, or Canadian citizen. Understanding how it works helps you keep more of your earnings and access benefits you may qualify for.

How Tax Brackets Work in Canada

Canada uses a marginal tax system: each portion of your income is taxed at its own rate, not your entire income at one rate. This means you pay lower rates on lower portions of income and higher rates on higher portions. The federal government and your province or territory each apply their own tax brackets.

Your provincial rate is determined by where you live on December 31 of the tax year. For example, if you move from Manitoba to Ontario in July and remain in Ontario by year-end, you pay Ontario provincial tax rates for the full year.

In 2025, the lowest federal income tax rate is 14.5%, up from 15% the previous year. This rate applies to income up to approximately $57,375 (amounts are indexed annually for inflation). The federal rate then increases through additional brackets: 20.5% on income from roughly $57,375 to $114,750, 26% from there to about $177,882, and 29% on income up to $253,414 and beyond. Quebec administers its own provincial tax system, while other provinces and territories have their own brackets that combine with the federal brackets you owe.

When combined with provincial and territorial tax, your total marginal rate can range significantly. In provinces like Ontario and British Columbia, high earners may face combined rates of approximately 53% to 54% on top-bracket income. In lower-tax provinces like Alberta, the combined rate may be lower.

Tax Residency vs. Immigration Status

A critical concept for newcomers is that tax residency and immigration status are separate. You can be a temporary resident (like an international student or foreign worker) and still be a tax resident of Canada. Conversely, you could be a permanent resident and live outside Canada—but then you may have different tax obligations.

Determining Your Tax Residency

The Canada Revenue Agency (CRA) considers you a factual resident of Canada if you establish significant residential ties here. Primary ties include a home you own or rent and a spouse or dependents in Canada. The CRA also weighs secondary ties such as personal property in Canada, bank accounts, health insurance in a Canadian province or territory, memberships in Canadian clubs, and a Canadian driver's license or passport.

If you spent 183 days or more in Canada in a calendar year and are not considered a resident of another country with which Canada has a tax treaty, you may be considered a deemed resident and must file taxes on your worldwide income.

International students and temporary workers who have established significant residential ties—such as renting an apartment and having family in Canada—may still be tax residents even though they hold study or work permits. This means you must report worldwide income and can claim tax deductions and credits.

Permanent Residents and Tax Obligations

If you are a permanent resident (PR) and live in Canada, you are considered a tax resident. This means you must file an income tax return in Canada and report all worldwide income. This obligation continues as long as you maintain PR status and significant residential ties, even if you travel outside Canada for work or other reasons.

The Social Insurance Number (SIN)

A Social Insurance Number is a nine-digit number issued by Service Canada that you need to work legally in Canada. You also need a SIN to access many government programs and benefits, file your income tax return, and handle other financial matters.

Who Can Apply for a SIN

You must have valid immigration status in Canada to apply for a SIN. This means you can be a Canadian citizen, permanent resident, or temporary resident (such as a student or foreign worker) with a valid permit. You cannot get a SIN without proving your legal status.

There are two types of SINs. Permanent SINs are issued to Canadian citizens and permanent residents and do not expire. Temporary SINs are issued to temporary residents like international students and foreign workers; these expire and must be renewed when your immigration document (work permit or study permit) is renewed. Temporary SINs always begin with the digit 9.

How to Apply

Service Canada administers the SIN application process. There is no fee. You can apply online, in person at a Service Canada Centre, or by mail. You need to provide a primary identity document (such as your permanent resident card, valid work or study permit, birth certificate, or passport) and a secondary identity document (such as a government-issued photo ID).

If you apply in person, you receive your SIN immediately on a printed letter called a Confirmation of SIN. If you apply online, you will receive a confirmation email within one to three business days and can access your SIN through your My Service Canada Account (MSCA). Mail applications typically take around 20 days.

When and Why You Must File a Tax Return

You may think you only need to file a tax return if you owe money. In reality, many newcomers should file even if they earned modest income or earned no income at all.

Why File Even With Low Income

Filing a tax return, even if you don't owe tax, allows you to claim non-refundable and refundable tax credits and benefits. These include the Canada Child Benefit (if you have children), the Canada Training Credit, the Canada Workers Benefit, and the GST/HST credit. Temporary residents may become eligible for the Canada Child Benefit in the 19th month they have lived in Canada, provided they hold a valid permit. If you do not file, you cannot receive these payments.

Additionally, if you have been working in Canada, your employer may have withheld income tax from your pay. Filing allows you to claim a refund if more tax was withheld than you actually owe.

Who Must File

You must file a tax return if you are a tax resident of Canada and any of the following apply: you owe federal or provincial tax, you disposed of capital property such as a principal residence, you want to claim the Canada Training Credit or Canada Workers Benefit, you have not repaid amounts withdrawn from a Registered Retirement Savings Plan (RRSP) under the Home Buyers' Plan or Lifelong Learning Plan, or you want to claim tax credits and benefit payments.

Filing Deadlines and Penalties

Missing tax filing deadlines can result in penalties and interest on amounts owing. For the 2025 tax year (filed in 2026), the deadline for most individuals to file and pay any taxes owed is April 30, 2026. If you are self-employed or your spouse or common-law partner is self-employed, you have until June 15, 2026 to file, but any taxes owed must still be paid by April 30 to avoid interest charges.

You can start filing your tax return online as early as February 23 each year through the CRA's NETFILE service or certified tax software. Filing online is faster and usually results in quicker refunds than mailing a paper return.

How to File Your Tax Return

You can file your tax return online or by mail. Online filing through NETFILE-certified tax software is strongly recommended because it is faster, reduces errors, and provides quicker refunds. Many free tax software options are available to lower-income filers. If you file online with direct deposit set up, you can receive your refund in as little as eight business days. Paper returns processed by mail take approximately 12 weeks.

To file, you need your tax information slips (such as T4 from employers or T4A from other income sources, which you should receive by the end of February), your SIN, and details of any deductions or credits you want to claim. The CRA provides a free Auto-fill My Return service if you have a CRA My Account. This service automatically populates parts of your return with information the CRA already has on file.

If you struggle with the process or have a straightforward tax situation, the CRA offers SimpleFile services, free tax clinics staffed by volunteers, and support through its website and chatbot. These services are available at no cost.

Key Takeaways for Newcomers

• Canada uses a marginal tax system; each portion of income is taxed at a different rate, not your entire income at one flat rate.
• You pay both federal and provincial or territorial income tax. Your provincial rate is determined by where you live on December 31.
• Tax residency is separate from immigration status. Even temporary residents with study or work permits may be tax residents if they have significant Canadian residential ties.
• You need a Social Insurance Number (SIN) to work legally in Canada. It is free and available to anyone with valid immigration status.
• File your tax return even if you earned little or no income, because you may qualify for non-refundable credits, refundable benefits, and tax credits.
• The filing deadline for most people is April 30; self-employed individuals have until June 15 but must pay taxes owing by April 30.
• File online if possible. It is faster, reduces errors, and results in quicker refunds than filing by mail.
• Late filing and non-payment result in penalties and compound daily interest.