formli AI logo formli AI
Back to Library
🇨🇦 Canada

TD1 Personal Tax Credits (Canada)

Canadian Federal Tax Credits Declaration

Easy ~10 min TaxCanadaEmploymentCRA

/ What is this form?

The TD1, Personal Tax Credits Return, is Canada's equivalent of the US W-4 or Australian TFN Declaration — a form completed by employees to inform their employer how much income tax to deduct from each paycheck through the PAYG (Pay As You Go) system. Unlike the US W-4 which uses dollar amounts, the TD1 uses personal tax credit amounts that your employer applies against a formula to determine the tax deduction.

Two forms are always required: the federal TD1 (for federal income tax) and the provincial/territorial TD1 (for provincial income tax). Each province and territory has its own version: TD1ON (Ontario), TD1BC (British Columbia), TD1AB (Alberta), TD1QC (Quebec — different process through Revenu Québec), etc. Quebec has its own provincial tax system and uses the TP-1015.3-V form instead of a provincial TD1.

The TD1 applies tax credits — amounts that reduce your taxable income — rather than allowances. The most universal credit is the Basic Personal Amount ($16,129 federal for 2025), which everyone claims. Additional credits for age (65+), disability, tuition, spouse/partner support, and others are added by eligible individuals. The total claim amount reduces the tax withheld from each paycheck.

/ Who needs this form?

  • Every new employee starting work in Canada on their first day of employment
  • Employees whose personal circumstances change significantly (marriage, new dependent, retirement income begins)
  • Students receiving scholarships or bursaries that may affect credit claims
  • Workers taking on a second job (second employer needs a separate TD1 with no basic amount claimed)
  • Employees returning from leave (parental leave, medical leave) who want to confirm withholding is correct

/ What you need before you start

Your Social Insurance Number (SIN)
Information about your personal situation: age, marital status, whether you have dependants you support financially
Details of any disability (for disability amount claim)
Information about post-secondary tuition paid by a child/spouse you support (for tuition transfer)
Pension income details if you are retired and receiving pension

/ Step-by-step guide

1 Understand the Two TD1 Forms Required
You must complete TWO TD1 forms: the federal TD1 (Canada Revenue Agency) and a provincial/territorial TD1 specific to your province of employment. For example, in Ontario you complete TD1 and TD1ON; in British Columbia, TD1 and TD1BC. Both are submitted to your employer together.
2 Claim the Basic Personal Amount (Line 1)
The basic personal amount is an amount everyone is entitled to — $16,129 federally for 2025. Everyone claims this. Your employer will automatically calculate the tax deduction so that you pay zero tax on income up to this amount.
3 Claim Additional Credits You Qualify For
Other credits available on the federal TD1: age amount (65+), spouse or common-law partner amount (if supporting), eligible dependant amount, caregiver amount, disability amount (self or for dependant), tuition (for post-secondary students transferring credit from child), pension income amount, RRSP deduction.
4 Use the Back of the Form if Needed
The back of the TD1 has sections for additional deductions or requesting more tax to be withheld. If you have significant RRSP contributions, rental losses, or other deductions that reduce your tax, you can request reduced withholding. If you want extra tax withheld (to cover investment income), enter a flat dollar amount.
5 Sign and Give to Employer
Sign and date both forms. Give both the federal TD1 and the provincial TD1 to your employer's payroll or HR department on or before your first day. Your employer applies these credits to calculate the correct PAYG tax deduction (deduction at source) from each paycheck.

/ Key fields explained

Field What to enter Common mistake
Line 1 – Basic Personal Amount Everyone claims the full basic personal amount: $16,129 for 2025 federal. Leave other lines blank if none apply. Entering $0 or leaving Line 1 blank — this causes maximum tax withholding on all income from dollar one. Always claim the basic personal amount unless you have already claimed it at another employer.
Line 3 – Spouse or Common-Law Partner Amount If your spouse/partner's net income for the year will be below $16,129, you may claim this amount. The claim is $16,129 minus their expected net income. Claiming the full spouse amount when your spouse has significant employment income — if your spouse earns above $16,129, you cannot claim this credit and claiming it causes under-withholding.
Line 10 – Age Amount (65 or older) If you will be 65 or older in the tax year and your net income is below $44,325 (2025), you can claim up to $8,396. Not claiming the age amount when eligible — many seniors are unaware of this credit and overpay tax unnecessarily.
Additional Tax to Deduct (Back of Form) Enter a flat dollar amount of extra tax to deduct from each pay period if you want more withheld (to cover investment income, rental income, self-employment income, or capital gains). Not requesting additional withholding when you have significant non-employment income — without additional withholding, CRA may charge interest on arrears or installment penalties.

/ Common mistakes to avoid

Completing only the federal TD1 and forgetting the provincial — both are mandatory. Missing the provincial form means incorrect provincial tax withholding.
Claiming the basic personal amount at a second employer — if you have two jobs, the basic amount should be claimed only at the higher-paying job. Claiming at both causes under-withholding.
Quebec employees using the federal TD1 provincial form — Quebec uses its own TP-1015.3-V form for provincial withholding, not the standard provincial TD1 format.
Not updating the TD1 within 7 days when credits decrease — for example, if your spouse starts earning above $16,129, you must submit an updated TD1 within 7 days.

/ Frequently asked questions

Do I need to complete a TD1 every year?

No — your TD1 remains in effect until you submit a new one. However, you must submit a new TD1 within 7 days if your entitlements change (a credit decreases or is no longer valid). Review annually to ensure your withholding reflects your current situation.

What is the TD1 for Quebec?

Quebec has a separate provincial income tax system. In addition to the federal TD1, Quebec employees complete TP-1015.3-V for provincial Quebec income tax withholding, managed by Revenu Québec rather than CRA.

What happens if I claim too many credits?

Under-withholding results in a tax balance owing when you file your annual T1 tax return. CRA charges interest on overdue amounts and may require installment payments the following year. In severe cases, penalties may apply.

Can I request reduced withholding for RRSP contributions?

Yes. If you make regular RRSP contributions and want reduced withholding to reflect this, submit a letter to your employer (not on the TD1 form itself) along with CRA authorization — CRA Form T1213 allows approved reduced withholding.