The T1 tax form in Canada is the personal income tax and benefit return that individuals use each year to report their income, calculate how much tax they owe or are owed back, and qualify for federal benefits like the GST/HST credit and the Canada Workers Benefit. For most people, the T1 for the 2025 tax year is due April 30, 2026, along with any balance owing.1Canada Revenue Agency (CRA). Filing Due Dates for the 2025 Tax Return
Who Has to File a T1
If you’re a Canadian resident and you owe tax for the year, you’re required to file. You also need to file if you disposed of capital property during the year, received a demand to file from the CRA, or want to claim a refund.1Canada Revenue Agency (CRA). Filing Due Dates for the 2025 Tax Return
Plenty of people who owe nothing should still file. The CRA uses your T1 to calculate quarterly GST/HST credit payments, Canada Child Benefit deposits, and Old Age Security amounts. Skip a return and those payments can stop. Provincial and territorial credits are tied to the T1 as well, which is why even a simple return with modest income is worth submitting.
Canadian residents report worldwide income on the T1, not just money earned inside Canada. Employment income from a foreign employer, rental income from property abroad, and investment returns from international accounts all belong on the return. Non-residents with certain Canadian-source income, such as rental income from Canadian property or Canadian pension payments, may also need to file.
What You Need Before You Start
Your Social Insurance Number is the starting point. The CRA uses this nine-digit number to identify you for all tax purposes, and you enter it in Step 1 of the return.2Canada Revenue Agency (CRA). Social Insurance Number (SIN)
From there, gather the information slips that report earnings and taxes withheld during the year. A T4 reports employment income and the deductions your employer withheld. A T4A covers pension income, retirement payments, annuities, and other income like scholarships or commissions paid without employment. A T5 reports investment income such as interest and dividends from Canadian sources. These slips are issued by employers, pension administrators, and financial institutions, and they’re typically available by the end of February. RRSP contribution receipts may arrive later if you contributed in the first 60 days of the new year.3Canada Revenue Agency (CRA). Tax Slips – Personal Income Tax
Also collect receipts for any deductions or credits you plan to claim: medical expenses, tuition certificates, charitable donations, and RRSP contribution slips. You don’t submit most of these with the return, but the CRA can ask for them.
How the T1 Is Organized
The form walks through your finances in sequence: identification, total income, net income, taxable income, then the final tax calculation. You use the income tax package for the province or territory where you lived on December 31 of the tax year.4Canada Revenue Agency (CRA). Get a T1 Income Tax Package
The identification section captures your residency status, marital status, and SIN, all of which feed into credit calculations later in the return. Employment income goes on Line 10100, which matches Box 14 of your T4 slip.5Canada Revenue Agency. Line 10100 – Employment Income The early figures matter because every downstream calculation builds on them.
Filing Deadlines
For most individual taxpayers, the T1 for the 2025 tax year must be filed by April 30, 2026, and any balance owing is due on the same date.1Canada Revenue Agency (CRA). Filing Due Dates for the 2025 Tax Return When April 30 falls on a weekend or a CRA-recognized public holiday, the deadline shifts to the next business day.6Canada.ca. Businesses Have Different Filing and Payment Deadlines – Here Is a Quick Reference to Help You Stay Organized
Self-employed individuals and their spouses or common-law partners get until June 15, 2026 to file.7Canada.ca. Due Dates and Payment Dates – Personal Income Tax The payment deadline does not move. If you owe money, it’s still due April 30 regardless of the later filing date, and interest starts accumulating the moment you miss the payment date.
How to Submit Your Return
Most Canadians file electronically. NETFILE lets you send your return directly to the CRA using certified tax preparation software.8Canada.ca. NETFILE – Tax Software for Filing Personal Taxes If you use a professional tax preparer, they’ll transmit your return through EFILE, the equivalent system for approved preparers.9Canada Revenue Agency. EFILE for Electronic Filers Modern tax software can also pull slip data directly from the CRA through the Auto-fill feature, which cuts down on manual entry errors.
Paper filing is still an option. You mail your return to the tax centre assigned to your region. The CRA aims to process electronic returns within four weeks, compared to eight weeks for paper.10Canada Revenue Agency. Check CRA Processing Times
If You Are Self-Employed
Business or professional income means you’ll complete Form T2125 (Statement of Business or Professional Activities) alongside your T1.11Canada Revenue Agency (CRA). T2125 Statement of Business or Professional Activities This form captures gross revenue, allowable business expenses, and the net income that flows onto your T1. Common deductible expenses include office supplies, vehicle costs for business travel, and home office expenses if you work from a dedicated space.
You may also need to make quarterly instalment payments if your net tax owing exceeds $3,000 in the current year and in either of the two preceding years ($1,800 for Quebec residents).12Government of Canada. Required Tax Instalments for Individuals Instalments are due March 15, June 15, September 15, and December 15. Missing them triggers interest charges and potential penalties.13Canada Revenue Agency. Interest and Penalties on Late or Incorrect Payments
Foreign Property Over $100,000
Canadian residents who hold specified foreign property with a total cost exceeding $100,000 at any point during the year must file Form T1135 with their T1. The threshold uses the cost amount, not current market value, and crossing it at any moment during the year triggers the filing obligation even if the property dipped below by year-end.14Canada.ca. Questions and Answers About Form T1135
A simplified reporting method is available if the total foreign property cost stayed below $250,000 throughout the year. Above $250,000, detailed information is required for each property. Specified foreign property covers foreign bank accounts, shares in foreign corporations held outside registered accounts, and foreign rental properties. It does not include property held inside your RRSP, TFSA, or other registered plans.
Penalties for Filing Late
Filing late when you owe money is expensive. The standard penalty is 5% of the balance owing, plus 1% for each full month your return is late, up to a maximum of 12 months. That puts the penalty alone at as much as 17% of what you owe. If the CRA charged you a late-filing penalty in any of the three preceding tax years and issued a demand to file, the rate doubles.15Canada.ca. Penalty for Filing Your Return Late
Compound daily interest applies to any unpaid balance on top of penalties. For the first quarter of 2026, the rate is 7% annually.16Canada.ca. Interest Rates for the First Calendar Quarter
If you owe nothing, there’s no financial penalty for filing late. But GST/HST credit, Canada Child Benefit, and OAS payments can be delayed or stopped until the CRA processes your return.
After You File
Once your return is processed, the CRA sends a Notice of Assessment summarizing the results. The NOA confirms the amounts you reported or flags any adjustments the CRA made.17Canada Revenue Agency (CRA). Notices of Assessment – NOA or NOR – Personal Income Tax Refunds are deposited directly to your bank if you’ve set up direct deposit, or mailed as a cheque. If the NOA shows a balance owing, payment is due immediately. Interest runs from the original due date, not from the date of the NOA.
If you spot a mistake after filing, don’t file a second return. Use the “Change my return” feature in your CRA My Account, the ReFILE service through certified tax software, or mail Form T1-ADJ to your tax centre. Paper adjustments take up to 14 weeks to process.18Canada.ca. Changing a Tax Return – Personal Income Tax
Keep all supporting documents for at least six years from the end of the tax year they relate to.19Canada Revenue Agency. How Long Should You Keep Your Income Tax Records That includes T4 slips, receipts, and bank statements. If the CRA reviews your return or you file an objection, those records are what back up the figures you reported.