If payroll year-end is approaching and you are still reconciling wages, taxable benefits, and source deductions, this is the right time to get organized. Knowing how to prepare T4 slips correctly helps you avoid CRA penalties, reduce employee questions, and close out your payroll year with confidence.
What a T4 slip is and who needs one
A T4 slip, or Statement of Remuneration Paid, reports employment income and payroll deductions for each employee for the calendar year. In most cases, if you paid salary, wages, bonuses, vacation pay, taxable allowances, or taxable benefits to an employee, you need to prepare a T4 slip.
This requirement applies to many Canadian employers, including corporations, nonprofits, incorporated professionals, and owner-managed businesses with staff. It can also apply to shareholder-employees if they were paid through payroll rather than only through dividends. The key distinction is whether the person was treated as an employee and whether payroll deductions were part of that compensation.
If someone was an independent contractor rather than an employee, a T4 is usually not the correct form. Misclassifying workers is a common issue, so if the relationship is not clear, it is worth reviewing before filing.
How to prepare T4 slips step by step
The process is straightforward when payroll records are accurate, but small errors in setup can create year-end problems. Start with your payroll register for January 1 to December 31 and confirm that all pay periods for the calendar year are complete.
1. Confirm employee information
Before you enter any year-end figures, verify each employee’s legal name, current address, social insurance number, and province of employment. A missing or incorrect SIN can trigger CRA issues and delays. If you have seasonal staff or employees who moved during the year, check your records carefully rather than relying on old payroll profiles.
2. Reconcile gross earnings
Your T4 totals should agree with your payroll records. Review regular wages, overtime, bonuses, vacation pay, commissions, retroactive pay, and any other employment income. If you processed manual adjustments during the year, make sure they were coded properly.
This is also where timing matters. T4 slips are based on the calendar year in which employees were paid, not necessarily when the income was earned. A bonus earned in December but paid in January generally belongs to the next year’s T4.
3. Review taxable benefits and allowances
Taxable benefits are often the area that causes the most trouble. Company vehicles, employer-paid life insurance, certain allowances, gifts over CRA thresholds, and some personal-use expenses may need to be included on the T4. Not every benefit is taxable, and not every taxable benefit is pensionable or insurable, so treatment can vary.
That is where a careful review matters. A vehicle benefit, for example, may affect income tax, Canada Pension Plan contributions, and Employment Insurance differently than a flat travel allowance. If benefits were not added to payroll during the year, year-end adjustments may be required before you prepare the slips.
4. Reconcile CPP, EI, and income tax deductions
Once earnings are confirmed, compare total CPP contributions, EI premiums, and income tax withheld to your payroll reports and CRA remittances. T4 slips should reflect what was actually deducted during the year.
If remittances do not line up with payroll records, pause before filing. Sometimes the issue is a timing difference at year-end, but in other cases it points to a missed payroll entry, incorrect employee setup, or benefit coding problem. Filing before reconciling usually creates more work later.
5. Complete the correct boxes on the T4
The main boxes most employers use include employment income, CPP contributions, EI premiums, and income tax deducted. Some employees will also need entries for pension adjustments, union dues, employment commissions, or taxable benefits reported in other information areas.
Accuracy matters more than speed here. A slip can look complete while still being wrong if income was reported in the wrong box or a taxable benefit was omitted. Payroll software can help, but software only reflects the data entered during the year.
6. Prepare the T4 Summary
In addition to individual slips, employers must prepare a T4 Summary. This reports the total remuneration and deductions for all employees and is submitted to the CRA along with the T4 slips. The totals on the summary should match the combined totals from all slips.
If the summary does not reconcile to your payroll records or remittance history, resolve that before filing. Mismatches are a common reason the CRA follows up.
Common mistakes when preparing T4 slips
Most T4 problems are not caused by the form itself. They usually come from payroll records that were never fully cleaned up during the year.
One common mistake is leaving taxable benefits until the last minute without supporting calculations. Another is reporting amounts based on what should have been deducted rather than what was actually processed through payroll. Employers also run into trouble when they forget to include terminated employees, casual workers, or shareholder-employees who received payroll income earlier in the year.
Province of employment is another detail that can be overlooked. This affects reporting and should reflect the employee’s reporting location for work, not simply where the head office is located. For businesses with remote or mobile teams, that distinction can matter.
There is also a practical trade-off between filing quickly and filing cleanly. Meeting the deadline is essential, but rushing through unresolved payroll issues often leads to amended slips. In many cases, a short internal review before filing saves time and reduces employee confusion.
T4 filing deadlines and delivery rules
T4 slips must generally be provided to employees and filed with the CRA by the last day of February following the calendar year being reported. If that date falls on a weekend or CRA-recognized holiday, the next business day typically applies.
Employees can receive their T4 slips electronically or by paper, depending on how your payroll process is set up and whether delivery requirements are met. What matters is that the slip is accessible, accurate, and issued on time.
Late filing can lead to penalties, and those penalties increase based on the number of slips and the length of the delay. Even small businesses with only a few employees are expected to meet the deadline.
When amended T4 slips are necessary
Sometimes you discover an error after filing. That does not always mean a major compliance problem, but it does need to be corrected properly. If employment income, deductions, taxable benefits, or identifying information was reported incorrectly, an amended T4 may be required.
The best approach is to correct the payroll records first, then update the slips and summary as needed. Trying to patch the issue informally without aligning the underlying payroll data can create discrepancies later, especially if the CRA reviews remittances or employees question their tax slips.
Should you prepare T4 slips in-house or outsource them?
It depends on the complexity of your payroll. If you have a small team, consistent payroll entries, and minimal taxable benefits, your payroll system may generate reliable T4 slips with only a final review. If your business has bonuses, vehicle benefits, owner compensation, multi-province staff, or prior-year cleanup issues, year-end reporting deserves closer attention.
For many business owners, the real question is not whether T4s can be prepared internally. It is whether the records behind them have been reviewed carefully enough to support accurate filing. That is where working with an experienced payroll and accounting team can reduce risk. Firms like WiseWealth Accountancy Services often help businesses reconcile payroll, verify year-end balances, and file with greater confidence.
A practical checklist before you file
Before submitting your T4 slips, confirm that all payroll for the year has been processed, employee information is current, taxable benefits have been reviewed, deductions match payroll records, remittances have been reconciled, and the T4 Summary agrees to the total slips. If one of those items is still unclear, it is better to resolve it now than explain it later.
Year-end payroll does not need to feel rushed or uncertain. When your records are organized and your review is thorough, preparing T4 slips becomes a controlled process instead of a last-minute scramble. A careful filing now makes tax season easier for your business and for every employee relying on that slip.
