A Small Business Guide to T4 Preparation

A missed payroll detail in December can become an employee problem in February. This guide to T4 preparation helps Canadian employers turn year-end payroll records into accurate tax slips, with fewer corrections, fewer last-minute questions, and a clearer filing process. While T4 reporting is a Canadian requirement, the practical goal is simple: reconcile what was paid, what was withheld, and what must be reported before slips are issued.

A T4 is not just another form. Employees use it to file their personal tax returns, and the Canada Revenue Agency uses it to compare reported income and deductions with your payroll remittances. An incorrect slip can delay an employee’s return, create avoidable correspondence, and require an amended filing from the employer.

What T4 Preparation Covers

A T4 slip reports employment income and certain taxable benefits paid during a calendar year, along with deductions and contributions withheld from the employee. Employers generally prepare a T4 for each employee who received salary, wages, taxable benefits, commissions, or other reportable employment income.

The information commonly reported includes gross employment income, income tax deducted, Canada Pension Plan contributions, Employment Insurance premiums, pension adjustments, and taxable benefits. Depending on the circumstances, you may also need to report items such as retiring allowances, employment commissions, union dues, or benefits related to group insurance and company vehicles.

The details matter because each amount belongs in a specific box. A payroll total that looks reasonable overall can still result in an incorrect T4 if a taxable benefit was omitted or classified incorrectly. That is why year-end preparation should begin with reconciliation, not form entry.

Start With a Complete Payroll Reconciliation

Before preparing slips, compare your payroll records for the full calendar year against the amounts remitted to the CRA. The goal is to confirm that the totals in your payroll system agree with your general ledger, bank payments, and payroll account records.

Review each employee’s year-to-date earnings and deductions. Check that names and Social Insurance Numbers are complete and accurate, and confirm current mailing or electronic delivery information. A wrong SIN or misspelled name may seem minor, but it can make it harder for the employee and CRA to match the slip to the correct taxpayer.

Pay special attention to employees who started or left during the year, changed pay rates, received bonuses, took unpaid leave, or had unusual deductions. These are common points where payroll records can be incomplete. If an employee worked at more than one location or under more than one payroll profile, make sure their annual information has been combined correctly where required.

For business owners, another frequent issue is mixing payroll with shareholder payments. Salary, dividends, management fees, and reimbursements are not reported the same way. Salary paid to an owner-manager may require a T4, while dividends are generally reported on a different information slip. Review the nature of each payment before including it in employment income.

Identify Taxable Benefits Before You Issue T4s

Taxable benefits are one of the most common sources of T4 errors. The benefit may not have been paid in cash, but it can still be taxable and reportable. Examples can include personal use of a company vehicle, employer-paid life insurance, certain gifts or awards, parking, low-interest loans, and some medical or wellness benefits.

The treatment depends on the benefit. Some are taxable for income tax, CPP, and EI purposes; others may be taxable only for some deductions. The timing also matters. If a benefit was identified late in the year but not added to payroll, you may need to calculate any related tax, CPP, or EI impact before finalizing the T4.

Reimbursements deserve a careful review as well. A properly documented reimbursement for a legitimate business expense is not automatically a taxable benefit. A flat allowance, however, may be taxable unless an applicable exception applies. Keep receipts, mileage records, approval notes, and expense policies organized so the distinction is supported by documentation.

Follow a Practical Guide to T4 Preparation

Once your payroll totals have been reconciled, move through the preparation process in a consistent order. Rushing directly to filing can hide mistakes that would be easy to correct earlier.

First, confirm your business identification details, including the legal business name and payroll program account number. Next, validate employee information and compare annual gross pay, deductions, and taxable benefits to your payroll reports. Then verify that total income tax, CPP, and EI amounts align with what was remitted during the year.

After that, prepare the individual T4 slips and the related T4 Summary or electronic filing information required for your filing method. Review the totals one more time before submitting. If your payroll software produces T4s automatically, do not assume the output is correct simply because it was generated by software. The quality of the forms depends on the accuracy of the payroll data entered throughout the year.

Keep copies of the slips, summaries, payroll registers, benefit calculations, remittance confirmations, and any adjustments made during the review. Good records make it easier to answer employee questions and respond if the CRA requests clarification.

Know the Filing and Distribution Deadline

T4 slips and the related information return are generally due to the CRA by the last day of February following the calendar year being reported. Employees must also receive their copies by that deadline. If the deadline falls on a weekend or public holiday, the due date may move to the next business day.

Do not leave employee delivery until the filing date. Some employees need their slips quickly to complete their own returns, apply for benefits, or provide income verification. Plan time for internal review, secure delivery, and corrections if an issue is discovered before submission.

Electronic filing is often the practical choice for employers with multiple slips. The required filing method can depend on the number of information returns being submitted, so confirm the current CRA rules before you file. Whether you file electronically or use another permitted method, retain proof of submission and delivery records.

Avoid the Errors That Lead to Amended Slips

Most T4 problems are preventable. They usually result from incomplete payroll setup, missed taxable benefits, unrecorded year-end adjustments, or a failure to reconcile remittances before filing.

Watch for these recurring issues:

• Reporting a bonus or commission in the wrong calendar year because it was approved in one year but paid in another.

• Forgetting to include taxable benefits such as personal vehicle use or employer-paid insurance.

• Using an incorrect SIN, employee name, address, or employer payroll account number.

• Reporting deductions that do not match payroll remittances or year-end payroll registers.

• Issuing a T4 for a contractor when the relationship and payment structure may call for a different information return.

The contractor question requires particular care. Calling someone an independent contractor does not, by itself, determine their tax status. Control over the work, ownership of tools, financial risk, opportunity for profit, and the overall working relationship can affect whether the worker is truly self-employed. When the facts are unclear, seek professional guidance before deciding how to report payments.

Build Better Payroll Records for Next Year

The easiest T4 season begins long before January. Maintain current employee records, review payroll reports monthly, and record taxable benefits when they arise instead of trying to reconstruct them at year-end. If your bookkeeping and payroll systems do not communicate clearly, establish a monthly process to compare wage expense, payroll liabilities, and remittances.

Small businesses can also benefit from a year-end payroll checklist that identifies bonuses, benefits, owner compensation, expense allowances, terminated employees, and contractor payments. This creates a predictable review process even when staffing or payroll responsibilities change.

For employers in London, Chatham, and surrounding Ontario communities, Ayad Accounting can help review payroll records, prepare T4 reporting, and address issues before they become filing corrections. The right support is especially useful when payroll includes benefits, multiple employees, shareholder compensation, or records that need to be brought up to date.

Give your T4 process enough time to be checked properly. Accurate slips protect your employees, support compliance, and let you start the new year focused on running the business rather than fixing last year’s payroll.