TD1

A TD1 is the Canadian payroll form employees use to help set up payroll withholding.

From a payroll perspective, TD1 matters because it is a setup document. It does not summarize year-end payroll results. Instead, payroll relies on it when determining how withholding should be handled going forward.

Why TD1 Matters

TD1 matters because it affects:

• Canadian payroll withholding setup
• employee onboarding and payroll-change workflows
• employee questions about why withholding changed
• the difference between setup forms and year-end payroll slips

It matters because readers often understand the paycheck result before they understand the setup form behind it.

Where It Appears In Payroll Workflow

TD1 appears before or during active payroll setup. In practice, payroll may:

• collect the employee’s TD1 information
• use it to configure withholding treatment
• update payroll records when the employee’s setup changes
• apply that setup in later payroll runs

That makes TD1 an input to payroll configuration rather than a payroll output document.

Simple Example

An employee starts a new job and completes payroll setup paperwork, including the TD1.

Payroll uses that information to configure withholding for later paychecks. The TD1 influences what appears on the pay stub, but it is not the pay stub itself.

Common Confusion

TD1 is often confused with:

• T4, which is the year-end payroll slip
• Source deductions, which are the paycheck-level result rather than the setup form
• W-4, which is the U.S. withholding-setup form
• Pay Stub, which shows payroll results after the setup is already being used

Related Terms

• Source Deductions
• T4
• W-4
• Employee Withholding
• Pay Stub
• Canada Payroll

Knowledge Check

1. Is TD1 a Canadian payroll setup form? Yes. That is its core payroll role.
2. Does TD1 summarize year-end payroll results? No. It helps set up withholding for later payroll.
3. Is TD1 closer to W-4 or to T4 in payroll function? It is closer to W-4 because both are withholding-setup forms.