A T4 slip is more than a year-end form. It is the record your employees use to file their personal income tax returns, and it is the record the Canada Revenue Agency uses to verify the payroll information your business reported throughout the year. This guide to T4 slips is designed for Canadian employers who want to complete payroll reporting accurately, meet deadlines, and avoid the cost and disruption of preventable corrections.
For a small business owner, T4 preparation often becomes difficult when payroll records have been handled inconsistently during the year. A missed taxable benefit, an incorrect employee address, or a payroll account that was not reconciled can turn a routine filing into a time-sensitive problem. The most reliable approach is to treat T4s as the final step in an organized payroll process, not as a task to solve in February.
What Is a T4 Slip?
A T4, Statement of Remuneration Paid, reports the employment income and deductions paid or withheld for an employee during a calendar year. Employers generally prepare a T4 slip for each employee who received salary, wages, taxable benefits, commissions, certain allowances, or other employment-related payments.
The employee receives a copy of the slip, while the employer files the information with the CRA along with a T4 Summary, where required by the filing method. The figures on the T4 should agree with your payroll records, source deduction remittances, and year-end accounting records.
T4 slips are distinct from other information returns. For example, payments to independent contractors may require a T4A in certain circumstances, while pension or retirement income may be reported on different slips. Worker classification matters. Calling someone a contractor does not automatically make them one for tax purposes, and misclassification can create payroll, tax, and employment law exposure.
Who Must Receive a T4?
In most cases, any person employed by your business during the year who received reportable remuneration should receive a T4. This can include full-time, part-time, seasonal, casual, and former employees. It may also include employees who left during the year but received taxable income before their departure.
A common concern is whether a T4 is needed for an employee with relatively low earnings. The answer depends on the type of payment and whether deductions or taxable benefits were involved. Rather than relying only on a dollar threshold, review the CRA reporting rules and your payroll records carefully. When in doubt, professional payroll advice can prevent an omission that requires an amended filing later.
Business owners should also pay close attention to shareholder-employees and family members working in the business. Their compensation must be documented, reasonable for the work performed, and processed correctly through payroll when paid as employment income.
Key Information on a T4 Slip
A T4 contains several boxes, but a few areas create the greatest risk when they are inaccurate. Box 14 generally reports employment income. This is the amount paid to the employee as salary, wages, commissions, bonuses, vacation pay, and certain other taxable amounts.
Box 22 reports income tax deducted. Box 16 reports employee Canada Pension Plan contributions, and Box 18 reports employee Employment Insurance premiums. These figures must match the amounts actually withheld and remitted, subject to the applicable annual limits and payroll rules.
Taxable benefits require particular care. A company vehicle available for personal use, employer-paid group insurance, housing, parking, gifts, and certain allowances may have payroll implications. The tax treatment depends on the benefit and the circumstances. If a benefit was not included in payroll when provided, it may require an adjustment before you produce T4s.
Other boxes may apply for CPP or QPP pensionable earnings, EI insurable earnings, union dues, pension adjustments, commissions, and employment codes. Not every box applies to every worker. Reporting unnecessary or incorrect information can be as problematic as leaving out a required amount.
Reconcile Before You Prepare the Slips
Before generating T4s, compare your annual payroll register with your general ledger and CRA remittance history. Total gross wages, income tax withheld, CPP contributions, and EI premiums should be explainable and supported by your records.
If the totals do not match, investigate before filing. Differences can arise from manual journal entries, off-cycle payrolls, adjustments to taxable benefits, payroll system setup errors, or remittances posted to the wrong CRA account. A reconciliation completed early gives you time to correct the source records rather than trying to force numbers into the T4 form.
T4 Deadlines and Filing Requirements
T4 slips and the related information return are generally due by the last day of February following the calendar year being reported. If the deadline falls on a weekend or public holiday, the next business day may apply. Employers must also provide employees with their copies by the same deadline.
Filing late can result in penalties, and the penalty may increase based on the number of slips filed and the length of the delay. Inaccurate reporting can also lead to employee frustration, especially when it delays their personal tax filing or creates questions from the CRA.
Electronic filing is required when filing more than 50 information returns of the same type. Even for smaller employers, electronic filing can be more efficient because it reduces manual entry and creates a clearer submission record. Paper filing may still be available in limited situations, but it requires close attention to format and delivery timing.
Do not wait until the final days of February to start. By then, a payroll discrepancy, missing social insurance number, or employee address issue can become urgent. Aim to complete your payroll review in January and produce draft T4s early enough for a second review.
How to Correct a T4 Slip
Mistakes happen, particularly when a business has changed payroll software, added taxable benefits, or relied on manual payroll calculations. The right response is to correct the slip promptly and keep a clear record of what changed.
If you discover an error after filing, you may need to submit an amended T4 or cancel and replace a slip, depending on the nature of the correction and the CRA filing process. Provide the employee with an updated copy so they can file or amend their own return using accurate information.
Do not simply issue a revised document to the employee without addressing the CRA filing requirement. The CRA’s records must also be corrected. Keep notes explaining the original error, the correction made, and the supporting payroll documentation. This creates an audit trail and makes future reviews much easier.
Common T4 Errors Small Businesses Can Avoid
The most common errors are usually process issues rather than complicated tax issues. Incorrect employee names or social insurance numbers can prevent information from matching CRA records. Failing to report a taxable benefit can understate income. Using the wrong employment income figure can affect the employee’s tax return, CPP, and EI reporting.
Businesses also run into problems when they confuse gross pay with net pay, overlook final payroll adjustments, or report deductions that were calculated incorrectly. Another frequent issue is assuming that payroll software will fix incomplete information automatically. Payroll software is useful, but it relies on accurate setup and timely entries.
To reduce errors, maintain complete employee records from the first day of employment. Review taxable benefits as they occur, reconcile payroll monthly or quarterly, and confirm that remittances are made under the correct payroll account. These habits make T4 season far more manageable.
When Professional Payroll Support Makes Sense
Some businesses can manage straightforward payroll internally, particularly when they have a small, stable team and reliable systems. However, outsourcing or obtaining a year-end review can be worthwhile when your business has commissions, bonuses, vehicle benefits, multiple provinces, shareholder payroll, changing employee counts, or prior CRA notices.
The trade-off is simple: internal payroll may appear less expensive until staff time, corrections, missed deadlines, and compliance risk are considered. Professional support provides an independent review of payroll records and helps ensure your T4s align with CRA requirements and your accounting records.
WiseWealth Accountancy Services helps Canadian business owners organize payroll information, review year-end reporting, and prepare T4 slips with accuracy and care. Timely payroll support gives you and your employees clearer records, fewer surprises, and more confidence when tax season arrives.
A well-prepared T4 starts long before February. Keep payroll records current, address discrepancies when they arise, and give your year-end reporting the same attention you give to the rest of your financial operations.
