2026 Tax Deadlines in Canada

There are so many different deadlines for personal, corporate, and HST taxes, plus various forms and slips to keep track of. But don’t worry, we’re here to help break it down for you and make it a little less painful.

First things first: if you’re an individual or business in Canada, you need to make sure you understand the critical deadlines and make sure you meet them. If you don’t, you could be hit with some nasty penalties and interest charges. We’re here to help you make sense of it all. If you have any questions or need assistance with your taxes, don’t hesitate to get in touch with us.

Table of Contents

1. Key deadlines

2. Personal tax deadline

3. HST/GST filing and payment deadlines

4. Corporate tax deadlines

5. Other dates

So, what are the key deadlines you need to know about? Let’s take a look:

• March 2, 2026: Last day to make an RRSP contribution deductible against your 2025 tax return.

• April 30, 2026: Last day to file your personal tax return if you don’t have self-employment income

• June 15, 2026: Last day to file your 2025 personal tax return if you have self-employment income (or are the spouse of someone who does).

• June 30, 2026: Last day to file a corporate tax return if your corporation has a December 31 year-end.

Got all that? Great! Now, let’s delve a little deeper into each of these deadlines to make sure you understand exactly what you need to do.

Filing Deadline:

• April 30, 2026: For most individuals.
• June 15, 2026: If you (or your spouse) have self-employment income.

Tax Payment Deadlines:

• April 30, 2026: Taxes owed must be paid by this date to avoid interest, regardless of your filing deadline.

Instalment Deadlines: 

• March 16, 2026
• June 15, 2026
• September 15, 2026
• December 15, 2026

Potential Penalties for Late Payment or Filing:

• If you’re late filing or paying your personal taxes, you could face some pretty steep penalties. Try our calculator which can accurately calculate your interest/penalties.

Your deadlines depend on your filing frequency:

• Monthly: One month after the reporting period.

• Quarterly: One month after quarter-end.

• Annual (non–self-employed): March 31, 2026 (if your year-end is December 31, 2025).

• Annual (self-employed): Same as your personal tax filing deadline (June 15, 2026), but payment is due April 30, 2026.

HST instalments in 2026:

• April 30, 2026

• July 31, 2026

• November 2, 2026

• February 1, 2027

Filing Deadline

• 6 months after year-end.

  • Example: For Dec 31, 2025 year-end  mean you need to file by June 30, 2026.

Payment Deadline

• 2 months after year-end (March 2, 2026, for Dec 31 year-end).

• 3 months after year-end if eligible for the small business deduction (March 31, 2026 for Dec 31 year-end).

Instalments for 2026 (calendar year-end):

• If paying monthly: Last day of each month
• If paying quarterly: 
  • March 31, 2026
  • June 30, 2026
  • September 30, 2026
  • December 31, 2026

• March 2, 2026: Deadline for employers to issue T4 slips and for financial institutions to issue T5 slips.

• March 2, 2026: RRSP contribution deadline (for 2025 tax year).

• March 2, 2026: Recommended deadline for charities to issue donation slips.

• March 31, 2026: Deadline for T3 trust returns and T5013 partnership returns (unless all partners are corporations, in which case it’s May 31).

If you have any questions or need help with your taxes, don’t hesitate to contact us at CoPilot Tax.