The T4 and T4A Filing Deadline in Canada
The official T4 and T4A filing deadline in Canada is the last day of February following the calendar year.
For example, the deadline for the 2023 tax year is February 29, 2024, because 2024 is a leap year. In contrast, for the 2024 tax year, the deadline will be February 28, 2025.
If the date falls on a weekend or public holiday, the deadline automatically shifts to the next business day. Therefore, employers should always verify the calendar in advance to avoid mistakes. As a result, meeting the deadline helps businesses maintain compliance and avoid CRA penalties.
Step-by-Step Filing Process for T4 and T4A Slips
Step 1: Collect Information
For T4 slips, record gross income, taxable benefits, CPP, EI, and income tax deductions.
For T4A slips, include contractor payments, pensions, scholarships, and commissions.
Step 2: Prepare the Slips
Employers can use the CRA’s Web Forms or Internet File Transfer (XML format). In addition, payroll software with CRA integration often simplifies this process. Double-checking the entries ensures accuracy and reduces the risk of costly amendments later.
Step 3: Distribute Copies
Employees and contractors must receive their slips by the deadline. Slips can be delivered electronically (with recipient consent) or mailed as paper copies. Therefore, clear communication with staff about how they will receive slips is essential.
Step 4: File with the CRA
Employers must submit all slips along with a T4 or T4A Summary. If you are filing more than 50 slips, electronic submission is mandatory. Smaller employers may still use paper, but electronic filing is faster, more accurate, and strongly encouraged.
Step 5: Retain Records
All related documents must be kept for six years, as required by the CRA. As a result, businesses can respond quickly if the CRA requests an audit or additional documentation.