Learn How to File Taxes in Canada

Key Deadlines for 2026

Missing a tax deadline can cost you real money. For the 2025 tax year, most Canadian taxpayers must file their return and pay any balance owing by April 30, 2026. If you or your spouse are self-employed, you have until June 15, 2026, to file, but any taxes owed must still be paid by April 30. As of August 2026, the April 30 deadline has passed for most filers; if you still owe a 2025 return, file it now to limit penalties, and expect the same pattern (April 30, with a mid-June extension for the self-employed) for your 2026 return, due in spring 2027.

Filing late when you owe money triggers a penalty of 5% of your balance owing, plus an additional 1% for each month you’re late, up to 12 months. If you expect to owe taxes, preparing your return well before the deadline gives you time to arrange payment and avoid these charges.

Documents You Need

Before you start filing, gather all necessary documents. Your Social Insurance Number is essential, as the Canada Revenue Agency uses this nine-digit identifier for your tax account. Without it, your return will be delayed for weeks.

Most tax slips arrive by the end of February, though some investment slips may not appear until late March. You can access these slips through your CRA My Account, or your employer and financial institutions will mail them to you.

Required Tax Slips

• T4: Employment income and payroll deductions from your employer
• T5: Investment income such as interest from bank accounts or bonds
• T4A: Pension, retirement, annuity income, scholarships, and bursaries
• T4E: Employment Insurance benefits received during the year
• T2202: Tuition amounts for post-secondary education
• T4FHSA: First Home Savings Account amounts including qualifying withdrawals
• RRSP contribution receipts: From your financial institution showing contributions made
• Medical expense receipts: For claiming the medical expense credit
• Charitable donation receipts: From registered charities

Keep copies of all documents for at least six years, as the CRA requires retention for this period. If you need to request adjustments, you can amend returns for up to 10 years, so maintaining records longer provides flexibility.

How to File Your Return

Canadians have several options for filing their tax return. Most people file electronically using CRA-approved software, but professional services and paper filing remain available. Your choice depends on your tax situation’s complexity and your comfort with technology.

NETFILE – File Online Yourself

NETFILE lets you transmit your return directly to the CRA through certified tax software. This is the fastest method, providing an immediate confirmation number. Many software options are free for straightforward returns, including Wealthsimple Tax, GenuTax, and others listed on the CRA website.

The auto-fill feature connects directly to your CRA My Account and imports your tax slips automatically. This reduces manual data entry and minimizes errors. Most electronically filed returns are processed within four weeks.

EFILE – Through a Professional

Tax preparers submit returns through the EFILE system on your behalf. This option works well for complex situations involving foreign income, rental properties, or business activities. Professionals charge fees that vary by complexity, typically ranging from $50 to $200 or more.

SimpleFile Services

If you have a modest income and simple tax situation, you may receive an invitation for SimpleFile by Phone or SimpleFile Digital. These free CRA services guide you through basic returns. Eligibility is by invitation only, based on your previous year’s return.

Paper Filing

You can print and mail a paper return to your regional tax centre. Processing takes significantly longer, typically eight weeks. Paper filing is mainly used when electronic filing isn’t possible due to technical restrictions on your SIN or specific tax situations.

Tax Credits and Deductions

Filing your return triggers automatic consideration for several benefit programs. The GST/HST credit provides quarterly payments to individuals and families with modest incomes. The Canada Carbon Rebate ended in April 2025, but the Canada Child Benefit and provincial credits are also calculated from your return.

If you run a business or work as a freelancer, additional deductions apply. Home office expenses, business use of vehicle, and professional development costs can reduce your taxable income when properly documented.

Payment Methods

If your return shows a balance owing, you have several payment options. The fastest and most common method is online banking. Add the CRA as a bill payee in your bank’s website or mobile app, similar to paying any other bill.

Payment is usually credited the same or next business day. You can also set up pre-authorized debit through your CRA My Account to schedule payments. This ensures you never miss the deadline and can arrange instalments if you expect to owe taxes regularly.

• Online banking: Instant payment through your financial institution’s platform
• Pre-authorized debit: Schedule automatic payments from your account
• Debit card: Pay through CRA My Payment service using Visa Debit or Debit Mastercard
• In person: Visit your bank or credit union to make a payment
• By mail: Send a cheque to your tax centre, though processing is slower

For business owners and those with significant investment income, quarterly instalments may be required. If your net tax owing exceeds $3,000 in the current year and either of the two previous years, the CRA expects instalment payments rather than a single year-end amount.

After You File

Once submitted, the CRA processes your return and issues a Notice of Assessment. This document confirms whether you owe additional tax or will receive a refund. It also becomes an important financial record for mortgage applications and other credit decisions.

The CRA aims to process 95% of electronically filed returns within four weeks. Paper returns take approximately eight weeks. Returns selected for review may take longer, but most straightforward filings move through quickly.

If you discover an error after filing, you can request an adjustment. The CRA allows changes to returns for up to 10 years. Submit adjustment requests through your CRA My Account using the “Change my return” feature, or mail Form T1-ADJ to your tax centre.

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Bottom Line

Filing your Canadian taxes doesn’t need to be overwhelming. By gathering your documents early, choosing the right filing method, and understanding available credits, you can complete your return efficiently. Most Canadians with straightforward employment income can file online for free using CRA-certified software within an hour.

Remember that filing by April 30, 2026, keeps you in good standing and ensures you receive benefits you’re entitled to. If your situation involves self-employment, rental income, or foreign assets, consider consulting a tax professional for the first year, then using that return as a template for future filings.

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How to file taxes Canada – FAQ