Running a CPA firm in Canada means tracking deadlines that never stop moving. T1 season ends in April. T2 payments fall months before the return is due. Trust filings now carry new beneficial ownership obligations. Payroll remittances follow their own calendar entirely.
Miss one date and the CRA’s penalty clock starts immediately. Miss several, across a busy client portfolio, and the cost compounds fast.
CRA tax deadlines 2026 have not changed in structure, but the compliance load has grown. The T3 trust reporting expansion, tighter scrutiny on information returns, and a worsening staffing shortage across Canadian CPA firms have made deadline management harder than it looks on paper.
This CRA compliance calendar covers every major filing and payment deadline your firm needs to track through 2026 and into 2027. We have organised it by return type rather than calendar month, because that is how a practice actually manages compliance.
Canadian Tax Filing Deadlines
Quick-reference guide across all major CRA filing obligations. Dates assume a December 31 fiscal year-end for corporate obligations unless noted.
Quick answer For a December 31, 2025 corporate year-end, the T2 balance owing is due February 28, 2026 (or March 31, 2026 for eligible CCPCs), while the T2 return itself is due June 30, 2026.
| Date | Filing Obligation |
|---|---|
| 2026 | |
| T4, T4A, T5 slips filed with CRA and distributed to recipients (2025 tax year) | |
| T2 balance owing — most corporations, Dec 31 year-end | |
| RRSP contribution deadline (60 days after Dec 31) | |
| T2 balance owing — eligible CCPCs, Dec 31 year-end | |
| T3 Trust return (2025 tax year) | |
| Annual GST/HST return — corporations, Dec 31 year-end, prior year | |
| T1 personal return filing and payment (most individuals) | |
| T1135 filing deadline (individuals) | |
| T1 filing deadline — self-employed individuals; payment still due Apr 30 | |
| T2 corporate return filing (Dec 31, 2025 year-end) | |
| T1135 filing deadline — corporations, Dec 31 year-end | |
| SR&ED claim T661 (Dec 31, 2024 year-end, 18-month window) | |
| Mar / Jun / Sep / Dec 15 | Individual instalment payments (quarterly) Recurring |
| Monthly (15th) | Payroll source deduction remittances — regular remitters Recurring |
| 2027 | |
| T4, T4A, T5 slips filed with CRA and distributed to recipients (2026 tax year) | |
| Annual GST/HST return — corporations, Dec 31, 2026 year-end | |
| T1 personal return filing and payment (2026 tax year) | |
| T2 corporate return filing (Dec 31, 2026 year-end) | |
Common questions
When is the T2 corporate tax return due for a December 31 year-end?
The T2 return is due six months after fiscal year-end — June 30, 2026 for a December 31, 2025 year-end. The balance owing is due earlier: February 28, 2026 for most corporations, or March 31, 2026 for eligible CCPCs.
When are T4, T4A, and T5 slips due in Canada?
T4, T4A, and T5 slips must be filed with the CRA and distributed to recipients by February 28 following the calendar year they cover — February 28, 2026 for the 2025 tax year.
How often are payroll source deductions remitted?
Regular remitters must remit payroll source deductions by the 15th of the month following the pay period — a recurring monthly obligation rather than a single annual deadline.
T2 filing deadline vs. payment deadline: Not the same date
Corporate tax in Canada can result in confusion every year because of differing deadlines.
A corporation’s T2 corporate income tax return has to be filed within 6 months of the corporation’s fiscal year end. A corporation with a December 31st fiscal year end will have its tax return due no later than June 30, 2026. This is generally well known by the majority of businesses that prepare their taxes.
The date for making the tax payment is different from the tax return due date per the Income Tax Act. For most Canadian corporations, the amount paid after the corporation’s fiscal year end is due two months after the end of the corporation’s fiscal year end. So a corporation that has a December 31st fiscal year end will make its tax payment February 28, 2026, and not June 30, 2026.
Canadian Controlled Private Corporations (CCPC) that qualify for the small business deduction and have claimed the deduction in both the previous tax year and the current tax year can make their tax payment 3 months after the corporation’s fiscal year end. Therefore, a corporation with a December 31st fiscal year end that qualifies for the small business deduction will make its tax payment by March 31, 2026, and not February 28, 2026. Check eligibility very carefully. Making the wrong assumption that a 3 month period applies when it does not means your client will be paying “interest” on the amount owed/due starting from 2 months after the due date of their return until the date that those amounts are paid.Â
Corporations are charged “daily compounded” interest on any corporate tax balance that is outstanding/overdue. Therefore, any corporation that files their return in June (and pays 3 months late), will have been accruing interest from March until they pay those amounts. Filing the return as required does not prevent the corporation from accruing the interest.Â
Penalties for late T2 filings are as follows. 5% of the unpaid tax balance plus 1% per month for up to 12 months of unpaid tax. If there are repeated instances of late T2 filings, then 10% plus 2% per month on unpaid tax will be assessed.Â
Therefore, you will need to have 2 separate compliance dates for each corporate client within your firms compliance tracking system for each corporate client. 1. Date of filing. 2. Date of tax payment. You need to treat these as 2 separate compliance activities/engagements with each client.
T1 personal income tax filing and payment deadlines
Canadian tax filing deadlines for individuals in 2026 are anchored to two dates, depending on employment status.
For most individual clients, both the filing and payment deadline is April 30, 2026. Any balance owing must be paid on or before April 30 to avoid interest and penalties.
Self-employed clients and their spouses or common-law partners have until June 15, 2026 to file. The payment deadline does not move. Any taxes owed are still due by April 30, 2026. If a self-employed client files on time in June but has an unpaid balance, interest accrues from May 1.Â
Penalty for late T1 filing: 5% of the balance owing, plus 1% for each full month the return is late, up to a maximum of 12 months.Â
One practical note for your client communication calendar: late filing affects more than the return itself. The CRA processes benefit payments, including the GST/HST credit, Canada Child Benefit, and provincial credits, based on the most recent tax return on file. Late filing can pause or reduce those payments until the return is assessed. For clients relying on those benefits, a missed T1 deadline carries downstream financial consequences beyond the penalty itself.
EFILE window for 2025 T1 returns: The EFILE and ReFILE services opened February 23, 2026, and remain open until January 29, 2027.
T2 Corporate Income Tax: Filing Rules for Firms Managing Multiple Fiscal Year-Ends
Unlike individual clients, corporate clients do not share a universal filing date. The T2 filing deadline is six months after the corporation’s fiscal year-end. If the year-end falls on the last day of a month, the deadline is the last day of the sixth month following. If the year-end falls on any other date, the deadline lands on the same calendar day six months later.Â
For Canadian CPA firms managing a mixed client portfolio, this means tracking a rolling series of T2 deadlines Canada throughout the year.
Most corporations are required to file the T2 return electronically. Even where paper filing is permitted in limited cases, electronic submission is faster and reduces processing delays. GOV.UK
Key T2 dates for corporations with a December 31, 2025 year-end:
Obligation | Deadline |
Balance owing (most corporations) | February 28, 2026 |
Balance owing (eligible CCPCs) | March 31, 2026 |
T2 return filing | June 30, 2026 |
T1135 Foreign Income Verification | June 30, 2026 |
For corporations claiming SR&ED, the T661 claim for a December 31, 2024 year-end must be filed by June 30, 2026. Ross Martin
One point worth flagging to clients: corporations with a December 31 year-end must distribute T4 slips to employees and file with the CRA by February 28, 2027, regardless of the corporation’s fiscal year-end. Employee reporting follows the calendar year. Sterling & Wells
For firms handling HMRC corporation tax compliance outsourcing equivalents on the Canadian side, the staggered nature of T2 deadlines is where capacity gaps surface first. A firm with 60 corporate clients spread across four fiscal year-ends faces four concentrated pressure points annually, not one.
T3 Trust Returns: What Canadian CPA Firms Need to Know for 2026
The T3 filing landscape shifted significantly after 2023. New subsection 150(1.2) of the Income Tax Act imposed T3 filing requirements on virtually all express trusts, including bare trusts that were previously exempt.Â
For 2025 tax years, there is an important update. The CRA does not expect bare trusts to file a T3 return, including Schedule 15, for taxation years ending in 2025. However, certain bare trusts may be required to file for taxation years ending on or after December 31, 2026. Flag this now so clients are not caught off guard next cycle.
For all other express trusts, the T3 filing deadline is March 31, 2026 for the 2025 tax year.
Schedule 15 remains mandatory for most trusts that do file. It requires disclosure of all trustees, beneficiaries, settlors, and anyone with de facto control over the trust. Incomplete Schedule 15 forms are rejected. Re-filing after March 31 triggers late penalties.
Penalty for late T3 filing: $25 per day, with a minimum of $100 and a maximum of $2,500. For trusts subject to the expanded reporting requirements, gross negligence penalties can go significantly higher.Â
For firms managing a large number of family trusts, bare trusts, and estate trusts, the March 31 deadline lands in the middle of T1 season. Capacity planning around this overlap is one of the stronger arguments for tax preparation outsourcing during Q1.
Three deadlines that Candanian CPA firms underestimate
SR&ED (T661)
The SR&ED deadline is the most unforgiving deadline in Canadian tax. Every other CRA deadline has a late-filing option with penalties attached. SR&ED does not. Miss the 18-month window after the fiscal year-end and the claim is gone permanently. For a December 31, 2024 year-end, the SR&ED claim deadline is June 30, 2026. Filing at least three months before the 18-month deadline is recommended, to allow time to respond to any CRA requests for additional information.Â
Instalment Payments
Corporations owing more than $3,000 in federal tax must make monthly instalment payments. Individuals with significant non-withheld income pay quarterly, with 2026 instalment dates falling on March 15, June 15, September 15, and December 15.
The CRA offers three calculation methods: current-year, prior-year, and a combination approach. Choosing the wrong method, or missing a payment, triggers interest that compounds quickly.
T1135 Foreign Income Verification
Form T1135 must be filed for each year in which a Canadian taxpayer held specified foreign property with a cost exceeding $100,000 at any point during the year. For corporations, the deadline aligns with the T2 filing date. For individuals, it aligns with the T1 deadline. The standard penalty for late filing is $25 per day, up to a maximum of $2,500, and can increase significantly under gross negligence provisions.
These three deadlines share one thing in common: firms that discover them late have very little room to recover.
How Canadian CPA firms are handling the compliance load
A compliance calendar looks manageable on a single page. Across 50 or 100 clients with different fiscal year-ends, different remitter categories, and different filing obligations, the operational reality is considerably harder.
Understaffed firms take longer to complete returns, audits, and advisory deliverables. This erodes client satisfaction, creates competitive vulnerability, and increases the risk of missed deadlines during tax season. And the staffing situation is not improving quickly. In April 2024, 90% of hiring managers in Canadian finance and accounting roles reported struggling to fill vacancies. That pressure has carried forward into 2026.Â
Firms that have managed this well are not necessarily hiring more. They are redistributing. Routine preparation work, data reconciliation, return drafting, and slip filing move to a dedicated tax preparation outsourcing partner. In-house staff focus on review, client communication, and advisory work.
This is where Datamatics Business Solutions works alongside Canadian CPA firms. Our teams handle T1 and T2 preparation, bookkeeping, payroll processing, and information return filing under your firm’s supervision and quality standards. Firms working with us report up to 40% reduction in operational costs and 2x capacity growth without adding headcount.
If a CRA audit response becomes necessary, clean, well-prepared files make all the difference. That preparation starts with consistent, deadline-driven compliance, not reactive scrambling.
Keep your firm ahead of every CRA deadline with Datamatics Business Solutions
CRA tax deadlines 2026 span twelve months, multiple return types, and dozens of individual client situations. No two clients are identical. The compliance load only grows as your portfolio does.
Datamatics Business Solutions helps Canadian CPA firms manage that load without adding permanent headcount. From T1 and T2 deadlines Canada to payroll remittances and information returns, our qualified teams work as an extension of yours, under your review and your standards.
Explore how our tax preparation outsourcing and outsourced bookkeeping services support Canadian firms through every stage of the compliance calendar. Get in touch with Datamatics Business Solutions to discuss what your firm needs for 2026 and beyond.
What is the T2 filing deadline in Canada for 2026?
The T2 corporate income tax return is due six months after the corporation’s fiscal year-end. For a December 31, 2025 year-end, the filing deadline is June 30, 2026. Note that the payment deadline is separate and falls earlier: February 28 for most corporations or March 31 for eligible CCPCs.
What are the penalties for missing a CRA filing deadline?
For T1 and T2 returns, the penalty is 5% of the unpaid balance plus 1% per month for up to 12 months. Repeat offenders face double rates. Payroll remittance penalties begin at 3% for one to three days late and reach 10% for eight or more days late. T3 late filing attracts $25 per day up to $2,500.
Do bare trusts need to file a T3 return for the 2025 tax year?
No. The CRA confirmed bare trusts are exempt from filing a T3 return for taxation years ending in 2025. However, certain bare trusts will be required to file for taxation years ending on or after December 31, 2026. Firms should begin preparing affected clients now.
What is the SR&ED filing deadline?
The SR&ED claim must be filed within 18 months of the corporation’s fiscal year-end. There is no late-filing option. Missing the window permanently forfeits the claim.
