T4 Slip Explained for Newcomers: Canada Tax Guide 2026

If you worked in Canada during the previous tax year, your employer is required to issue you a T4 slip, officially called the Statement of Remuneration Paid. This document is essential for filing your income tax return with the Canada Revenue Agency (CRA). For newcomers, the T4 slip can seem confusing with its many numbered boxes and unfamiliar terminology, but once you understand what each section means, filing your taxes becomes far more straightforward. This guide breaks down everything you need to know about the T4 slip and how to use it when preparing your first Canadian tax return.

What Is a T4 Slip and When Will You Receive It?

A T4 slip is an official tax document that summarizes all employment income you received from a specific employer during the calendar year, along with the deductions that were taken from your pay. Canadian employers are legally required to provide T4 slips to their employees by the last day of February each year for the previous tax year. So for the 2025 tax year, you should receive your T4 slip by February 28, 2026.

If you had more than one employer during the year, you will receive a separate T4 from each employer. You need all of your T4 slips to file an accurate tax return. Most employers now provide T4 slips electronically through their payroll systems, but some still mail paper copies. You can also access your T4 slips through CRA My Account, which typically has them available by mid-March.

It is worth noting that the T4 is just one type of tax slip. You may also receive a T4A (for pension, retirement, or other income), T4E (for Employment Insurance benefits), T5 (for investment income), or other slips depending on your financial situation. Each of these has a different purpose, but the T4 is the most common for employed workers. For a deeper look at how the T4 fits into your overall tax picture, check out our detailed T4 guide.

See also: Employment Insurance (EI) Benefits Guide

Understanding Every Box on Your T4 Slip

The T4 slip contains numerous numbered boxes, each representing a different type of income or deduction. While not every box will have an amount for every employee, here are the most important ones you should understand:

Key Income Boxes

Additional Important Boxes

The figures in Box 14, Box 16, Box 18, and Box 22 are the ones you will use most directly when completing your tax return. Box 14 goes on Line 10100 of your T1 General tax return, and Box 22 goes on Line 43700. These calculations determine whether you owe additional tax or will receive a refund.

How to File Your Taxes Using Your T4 Slip

Once you have all your T4 slips, you are ready to file your income tax return. The filing deadline for most individuals is April 30, 2026 for the 2025 tax year. If you or your spouse or common-law partner is self-employed, the filing deadline is June 15, 2026, but any balance owing is still due by April 30.

Filing Options for Newcomers

Canada offers several ways to file your taxes. The most common and convenient method is using certified tax preparation software. The CRA maintains a list of NETFILE-certified software, many of which offer free versions for simple tax situations. Popular options include Wealthsimple Tax (formerly SimpleTax), TurboTax, and H&R Block. These programs walk you through each step and automatically populate the correct lines on your tax return based on the information from your T4.

You can also file through a tax professional or accountant, which may be a good idea for your first Canadian tax return if you have a complicated situation, such as income from outside Canada during the year you arrived or foreign assets to report.

Special Considerations for Your First Tax Year in Canada

As a newcomer, your first tax year may only be a partial year. If you arrived in Canada partway through the year, you only report income earned from your date of arrival onward for Canadian tax purposes. However, you still need to report your worldwide income for the period you were a Canadian resident. Your T4 will only show Canadian employment income, so you may need to separately report any foreign income earned after becoming a Canadian resident.

You should also be aware of the newcomer tax return, which requires you to enter your date of entry into Canada. This ensures the CRA calculates your personal tax credits on a prorated basis for the portion of the year you were a resident. Make sure your tax software or preparer knows you were a newcomer during the tax year to get the correct calculations.

Common T4 Mistakes and How to Fix Them

Mistakes on T4 slips do happen, and as a newcomer it is important to verify the information is correct. Here are common issues to watch for:

• Incorrect Social Insurance Number (SIN): Check that the SIN on your T4 matches the one on your SIN card or confirmation letter. An incorrect SIN can cause processing delays with the CRA.
• Wrong income amount: Compare Box 14 against your final pay stub for the year. The amounts should match. If they do not, contact your employer immediately.
• Missing T4: If you do not receive a T4 from an employer by the end of February, contact them directly. If you still cannot get it, contact the CRA for assistance.
• Incorrect province of employment: This matters because provincial tax rates vary. Ensure the province listed on your T4 matches where you actually worked.

If you find an error, ask your employer to issue an amended T4. They will file the corrected version with the CRA, and you should wait for the corrected slip before filing your tax return if possible. If the deadline is approaching and you still have not received a corrected slip, file with the best information available and request an adjustment later.

See also: How to Get Your SIN Number in Canada

Tax Credits and Deductions Newcomers Often Miss

Filing your taxes is not just about reporting income. It is also about claiming all the credits and deductions you are entitled to, which can significantly reduce your tax bill or increase your refund. Here are some that newcomers frequently overlook:

• GST/HST Credit: Even if your income is low, filing a tax return makes you eligible for the quarterly GST/HST credit payment. You must file to receive it.
• Canada Child Benefit (CCB): If you have children under 18, filing your taxes is required to receive this monthly benefit. Both parents must file.
• Moving expenses: If you moved at least 40 kilometres closer to a new work location or school in Canada, you may be able to deduct moving expenses.
• Medical expenses: Out-of-pocket medical expenses exceeding a threshold can be claimed, including health insurance premiums.
• RRSP contributions: If you contributed to a Registered Retirement Savings Plan, those contributions reduce your taxable income. Learn more in our RRSP guide for newcomers.
• Tuition and education amounts: If you took eligible courses, the tuition tax credit can provide significant savings.

Our Benefits Finder tool can help you identify government benefits and credits you may be eligible for based on your specific situation. Many newcomers leave money on the table simply because they do not know what is available to them.

Understanding Your Notice of Assessment

After you file your tax return, the CRA will send you a Notice of Assessment (NOA). This document confirms the CRA has received and processed your return. It shows your total income, taxable income, non-refundable credits, taxes payable, and your refund or balance owing. Importantly for newcomers, your NOA also shows your RRSP deduction limit for the following year, which starts accumulating based on your earned income in Canada.

Keep your NOA in a safe place. You may need it for future applications, including mortgage applications, certain immigration processes, and more. You can also access your NOA through CRA My Account at any time.

Important Tax Dates for 2026

Mark these key dates on your calendar to stay on top of your tax obligations:

Getting Help With Your Taxes

If you are feeling overwhelmed, you are not alone. Many newcomers find Canadian taxes confusing at first. Here are resources that can help:

• Community Volunteer Income Tax Program (CVITP): The CRA partners with community organizations to offer free tax preparation clinics for people with modest incomes and simple tax situations. This is an excellent resource for newcomers.
• CRA helpline: You can call the CRA at 1-800-959-8281 for personal tax inquiries. Wait times can be long during tax season, so try calling early in the morning.
• Settlement agencies: Many newcomer settlement agencies offer tax filing assistance or workshops during tax season.

If you have questions about any tax documents or forms, our Document Explainer can help you understand them in plain language. Simply paste the confusing section and receive a clear explanation tailored to your situation.

Filing your first Canadian tax return is a significant milestone in your settlement journey. By understanding your T4 slip and taking advantage of the credits and deductions available to you, you can ensure you are meeting your obligations while keeping more money in your pocket. Start by gathering your T4 slips, choose a filing method that works for you, and do not hesitate to ask for help if you need it.