TD1 Form for Self-Incorporated Canadians: What to Fill Out Before Payroll

TD1 form self incorporated Canada is a search that usually comes up right before an owner-manager runs payroll for the first time. If your corporation pays you T4 salary, the TD1 is the form that tells payroll which personal tax credits to use when calculating income tax withholding.

For a one-person corporation, it can feel odd to complete employee paperwork for yourself. But that is exactly how salary works: your corporation is the employer, and you personally are the employee.

TD1 Form Self Incorporated Canada: Why It Matters

The TD1 is not a paystub and it is not a tax return. It is a payroll form used to estimate the amount of tax to deduct from each paycheque. The main number on the form is your basic personal amount, plus any other credits you are eligible to claim.

If the TD1 credits are too high, your corporation may withhold too little tax and you may owe more when you file your T1 return. If the credits are too low, payroll may withhold more tax than needed and you may get a refund later. Either way, the goal is reasonable withholding during the year.

Most employees complete both a federal TD1 and a provincial or territorial TD1. If you pay yourself salary from your own corporation, keep copies with your payroll records.

When Should You Complete a TD1?

Complete a TD1 before your first salary payment from the corporation. You should also update it when your tax credit situation changes, such as:

• You move to a different province or territory
• You start or stop claiming a disability amount
• Your spouse or dependant situation changes
• You begin another job and need to adjust credits
• You want extra tax withheld each pay period

If you have not started payroll yet, first make sure the corporation has a CRA payroll program account. Our guide to setting up a CRA payroll account walks through that step.

Which Credits Should an Owner-Manager Claim?

Many self-incorporated Canadians simply claim the basic personal amount on the federal TD1 and the applicable provincial TD1. That is often fine if your corporation is your only employment income and your situation is straightforward.

Be careful if you have more than one source of employment income. If you claim the full basic personal amount with two employers, each employer may assume the same credits are available and withhold too little tax overall. In that case, you may need to claim credits with only one employer or ask for extra tax to be deducted.

If you are unsure, use CRA guidance or ask your accountant. The TD1 affects withholding, not your final tax entitlement. Your actual tax is calculated when you file your personal return.

How the TD1 Connects to Your Paystub

Once the TD1 is on file, payroll uses it along with your gross salary, pay frequency, CPP, EI, and tax tables to calculate net pay. Your paystub should then show the result clearly:

• Gross salary for the pay period
• CPP withheld
• EI withheld, if applicable
• Income tax withheld
• Net pay
• Pay period dates and pay date

For formatting details, see what must be on a Canadian paystub. For contribution mechanics, see our CPP and EI deduction rates guide.

A free tool like PaystubHero helps self-incorporated Canadians calculate payroll deductions and create a clean PDF paystub for each salary payment.

Do You Send the TD1 to CRA?

Usually, no. Employers keep TD1 forms in their payroll files and use them to support tax withholding calculations. CRA can ask to see payroll records, so store the signed TD1 with your paystubs, remittance confirmations, and year-end T4 support.

The practical file for a one-person corporation should include:

• Federal and provincial TD1 forms
• Paystubs for each pay period
• CRA remittance confirmations
• T4 and T4 Summary records
• Notes supporting unusual credits or extra withholding choices

Common TD1 Mistakes

Skipping the provincial TD1. Federal credits are only half the payroll picture. Provincial or territorial tax also needs a credit form.

Claiming credits twice. If you have another job, pension, or payroll source, check whether you are double-claiming the basic personal amount.

Never updating the form. A TD1 should reflect your current situation. Review it at least annually when you set your salary plan.

Confusing withholding with final tax. The TD1 helps estimate payroll tax deductions. Your actual tax bill is still determined by your T1 return, including salary, dividends, RRSP deductions, and other income.

Key Takeaway

Before paying yourself salary from your corporation, complete the federal and provincial TD1 forms and keep them in your payroll file. They help determine income tax withholding on each paystub and make your payroll records easier to defend if CRA ever asks.

Not tax advice — confirm your TD1 and payroll setup with your accountant if your situation is complex.