A T4 is not simply a year-end form to send after payroll is finished. It is the record that tells each employee and the Canada Revenue Agency (CRA) what was paid, what was withheld, and what was remitted during the calendar year. A reliable T4 filing guide starts well before February, with payroll records that agree to your books and remittances that have been handled correctly all year.
For a small business owner, the goal is straightforward: issue accurate slips on time, file the required information return with the CRA, and retain records that support every number. The work can become complicated when payroll data is incomplete, benefits have not been tracked, or an employee’s address and Social Insurance Number are missing. A structured process prevents the last-minute scramble.
What a T4 Reports
A T4, Statement of Remuneration Paid, reports employment income and certain taxable benefits paid to an employee from January 1 through December 31. It also reports deductions withheld, including income tax, Canada Pension Plan contributions, and Employment Insurance premiums.
Each employee who received salary, wages, bonuses, taxable benefits, or other reportable employment compensation generally needs a T4. The employer also files a T4 Summary when filing on paper, or submits the equivalent payroll information return electronically. The totals must agree with the slips issued to employees.
A common point of confusion is the difference between employees and independent contractors. Contractors are not normally issued T4 slips for services provided through their business. Depending on the payment and relationship, a T4A may be required instead. Classification matters because calling someone a contractor does not remove payroll obligations if the working relationship is truly one of employment.
T4 Filing Guide: Know the Deadline and Filing Method
T4 slips must be provided to employees and filed with the CRA by the last day of February following the calendar year being reported. If the final day falls on a weekend or public holiday, the deadline generally moves to the next business day.
Do not treat the filing date as the start of the process. By late January, you should have reconciled payroll, reviewed employee details, and confirmed that year-end adjustments are complete. Late or inaccurate slips can lead to penalties, employee frustration, and extra work when personal tax returns are being prepared.
Employers filing more than five information returns must file electronically. Even smaller employers may find electronic filing more practical because it provides confirmation that the return was received and reduces manual entry. Your payroll software may create the required file, but software output is only as reliable as the information entered during the year.
Start With a Year-End Payroll Reconciliation
Before preparing slips, compare your payroll register with your general ledger and CRA remittance history. This is the step that identifies most filing problems before they reach employees or the CRA.
Review total gross wages, bonuses, vacation pay, commissions, taxable allowances, and benefits for each employee. Then compare total income tax, CPP, and EI withheld with the amounts remitted to the CRA. Your books should reflect the same payroll expense and liability totals. If they do not, investigate the difference rather than forcing the numbers to match.
Small discrepancies may come from timing. For example, a December payroll paid in January is generally reported based on the payment date, meaning it belongs in the following calendar year’s T4 reporting. Larger differences may point to a missed remittance, a journal entry posted incorrectly, duplicate payroll, or a benefit that was never added to payroll.
Accurate bank reconciliations are useful here. They help confirm that payroll withdrawals, direct deposits, and CRA remittances cleared as expected. A clean reconciliation creates a stronger audit trail and makes year-end payroll review much faster.
Confirm Employee Information Before Creating Slips
A T4 with the wrong name, address, or Social Insurance Number can create delays for the employee and require an amended filing. Ask employees to confirm their current mailing address before slips are generated, particularly if they work remotely or moved during the year.
Employers should also verify that employee names match CRA records and that Social Insurance Numbers are complete and valid. Keep this information secure. Payroll records contain sensitive personal data and should be available only to staff or advisors who need access to perform their work.
For employees who left during the year, do not assume old contact information remains current. A former employee is still entitled to receive their T4 by the deadline, and an outdated address does not remove the employer’s responsibility to make reasonable efforts to provide it.
Include Taxable Benefits and Year-End Adjustments
Taxable benefits are one of the most frequent sources of T4 errors. Employer-paid benefits, personal use of a company vehicle, gift cards, certain allowances, and other non-cash compensation may need to be included in income. The tax treatment depends on the benefit, who received it, and whether an exemption applies.
Some benefits must be added to payroll throughout the year so appropriate deductions are withheld. Others require a year-end calculation. Waiting until T4 season to review benefits can create a problem: you may discover tax, CPP, or EI should have been withheld earlier. The right correction depends on the facts, so do not assume every benefit is treated the same way.
Owner-managers need particular care. Salary and bonuses paid through payroll are generally reported on a T4, while dividends are reported differently. Mixing these forms of compensation without clear records can make year-end reporting difficult and affect corporate and personal tax planning.
Submit, Deliver, and Keep Proof
Once the slips are complete, submit the information return to the CRA using the appropriate filing method. Deliver a copy to each employee by the same deadline. Electronic delivery may be acceptable when the employee has provided written or electronic consent; otherwise, provide a paper copy.
Keep copies of the filed slips, payroll registers, remittance confirmations, benefit calculations, and reconciliation working papers. Payroll records should generally be retained for at least six years from the end of the last tax year they relate to. Good records are not only useful if the CRA asks questions. They also make it easier to respond when an employee needs a duplicate slip or notices an issue on their return.
How to Correct a T4 Error
Mistakes happen, especially when a business has changed payroll providers, added benefits, or processed manual payments. If an error is found after filing, prepare an amended T4 and submit the correction through the appropriate CRA process. Give the corrected slip to the employee as well.
Do not issue a second slip with the intention of replacing the first unless the filing method specifically requires it. Duplicate reporting can make the employee’s income appear overstated. Clearly mark or identify amended slips according to CRA requirements, and retain documentation showing what changed and why.
If you discover that payroll deductions were missed or remittances were short, the filing correction may be only one part of the solution. Address the underlying payroll liability promptly and obtain professional guidance when the amounts or classification issues are significant.
Build a Better Process for Next Year
The most efficient T4 season is created through consistent payroll administration, not a heroic February cleanup. Record payroll on time, reconcile bank and payroll accounts monthly, track benefits as they arise, and review CRA remittances against payroll reports throughout the year.
For businesses managing payroll internally, a brief quarterly review can catch issues while they are still easy to correct. For a growing company with several employees, variable compensation, or owner compensation planning, outsourced bookkeeping and payroll support may reduce risk and free up time for the business itself.
A careful T4 process protects both your employees and your company. If your payroll records do not reconcile cleanly or you are uncertain how to report a payment or benefit, address it before filing season turns a manageable question into a costly correction.