T4 Filing Checklist (Canada)

By True North Payroll · January 16, 2026 · Practical guide for Canadian small teams

T4s are required for any employer who paid salary or wages in Canada. Use this checklist to make sure you have everything ready before filing.

1) Employer information

Business number / payroll account (BN/RP)
Company legal name and address
Contact name, phone, and email

2) Employee information

Legal name
Address
SIN

True North Payroll does not store SINs. If you enter a SIN for T4 export, it is used only to generate the file and is not saved.

3) Payroll totals (per employee)

Employment income
CPP contributions
EI premiums
Income tax deducted

4) Filing deadline

CRA requires T4 slips and summaries to be filed by the last day of February following the calendar year. Employees must receive their T4 slips by the same deadline.

If you file electronically and issue more than 5 slips, CRA requires electronic filing.

5) Filing method

Most small employers use CRA Web Forms. Larger batches can be filed through Internet File Transfer (IFT).

How True North Payroll helps

We track payroll history, generate T4-ready exports, and never store SINs.