When do I need to fill out a TD1 form?

You must complete a TD1 when you start a new job, when you want to change how much tax is withheld (e.g., your situation changed), or when requested by your employer. You should update your TD1 if you get married or divorced, if you start caring for a dependent, if you or a dependent becomes eligible for the disability tax credit, if you have tuition carry-forward credits, or if your income situation changes materially. There is no annual requirement to resubmit — your TD1 stays in effect until you update it.

What is the basic personal amount on the TD1?

The federal basic personal amount is the standard non-refundable tax credit CRA allows every Canadian. For 2025, the federal basic personal amount is $16,129. This amount is automatically included on the TD1 — you do not need to calculate it separately. If you earn less than $173,205, your full $16,129 applies. Higher-income earners (above $246,752) have a reduced basic personal amount of $14,538. Provinces have separate basic personal amounts listed on the provincial TD1 form (e.g., Ontario TD1ON Provincial).

What do I do if I have more than one job?

If you have two or more jobs simultaneously, you should only claim the full TD1 credits at your primary employer — where you expect to earn the most income. For secondary employers, check the "More than one employer or payer at the same time" box on the TD1 and enter $0 as your total claim amount, or a reduced amount. This directs the secondary employer to withhold at the maximum rate. Claiming the same credits at two employers results in under-withholding and a balance owing at tax time.

Can I ask my employer to withhold extra tax using the TD1?

Yes. There is a line on the TD1 where you can request additional tax withholding per pay period. This is useful if you have rental income, freelance income, or investment income that will generate a balance owing at tax time — you can smooth out the payment by having slightly more withheld from each paycheque. Enter the additional amount per period on Line "Additional tax to be deducted." There is no maximum — you can request as much additional withholding as you want.

Is there a separate provincial TD1 form?

Yes. In addition to the federal TD1, each province has its own TD1 form (e.g., TD1ON for Ontario, TD1BC for British Columbia, TD1AB for Alberta). The provincial form captures provincial-only credits and personal amounts that differ from the federal form. Your employer uses both forms together to calculate the correct combined federal and provincial withholding. You complete both when starting a new job. Quebec uses a different form (TP-1015.3-V for provincial withholding) alongside the federal TD1.

What Is a TD1 Form in Canada?

Q: What is a TD1 form in Canada?

A TD1 (Personal Tax Credits Return) is the form you complete when starting a new job to tell your employer how much income tax to withhold from your paycheque. It lists the federal (and provincial) personal amounts and credits you expect to claim for the year — the basic personal amount, spousal amount, disability credit, tuition carry-forward, and others. Your employer uses your total TD1 claim amount to calculate the correct withholding amount. If you do not submit a TD1, your employer deducts tax as if you have no credits beyond the basic personal amount.

Short Answer

A TD1 is the form that tells your employer how much income tax to withhold from your pay. It lists the personal amounts and credits you expect to claim — and directly determines your take-home pay. Complete both the federal TD1 and your province’s TD1 when starting a new job, and update them when your personal situation changes.

TD1 Personal Tax Credit Lines (Federal 2025)

Line	Credit	2025 Amount
1	Basic personal amount	$16,129 (reduced above $173,205)
2	Canada caregiver amount for infirm children under 18	$2,616/child
3	Age amount (65+, if income < $44,325)	$8,790
4	Pension income amount	Up to $2,000
5	Tuition (full-time/part-time carry-forward amounts claimed)	Varies
6	Disability amount	$10,522
7	Spouse/common-law partner amount	Up to $16,129
8	Amount for eligible dependant	Up to $16,129
9	Canada caregiver amount for eligible dependant (age 18+)	Up to $8,375
10	Canada caregiver amount for dependant(s) age 18+	Up to $8,375/person
11	Amounts transferred from spouse/common-law partner	Their unused amounts
12	Amounts transferred from a dependent	Tuition, disability, etc.
Total	Total claim amount	Drives withholding calculation

Provincial Basic Personal Amounts (2025)

Province/Territory	Basic personal amount
Ontario	$11,865
British Columbia	$11,981
Alberta	$21,003
Quebec	$17,183 (on TP-1015.3-V)
Saskatchewan	$17,661
Manitoba	$15,780
New Brunswick	$12,458
Nova Scotia	$8,481
PEI	$12,000
Newfoundland	$10,818
Northwest Territories	$16,593
Yukon	$16,129
Nunavut	$17,925

Alberta’s significantly higher basic personal amount means less provincial tax is withheld from each paycheque compared to other provinces.

Multiple Jobs: What to Do

Scenario	TD1 instruction
Only one job	Claim full credits on the TD1
Two simultaneous jobs	Claim full credits at primary employer only
Secondary/part-time job	Check the “more than one employer” box → withhold at maximum rate
Seasonal second job	Same — claim $0 at the seasonal employer
New job replacing old job	Claim full credits at the new employer

Claiming credits at two concurrent employers simultaneously causes under-withholding. CRA still collects the tax owing — just as a lump sum at filing time, plus potential arrears interest if installments were required.

Common Situations That Should Trigger a TD1 Update

Life change	TD1 update action
Got married or entered common-law	Add spousal amount (Line 7) if partner has low/no income
Separated or divorced	Remove spousal amount
New child	Consider eligible dependant amount (Line 8) if single parent
Disability Tax Credit approved	Add disability amount (Line 6)
Turned 65	Add age amount (Line 3)
Started receiving a pension	Add pension income amount (Line 4)
Tuition carry-forward from a prior year	Add carried forward tuition on Line 5
Second job ended	Update secondary employer’s TD1 if credits were suppressed

Additional Tax Withholding

The TD1 includes a voluntary additional withholding line:

Why request additional withholding	When it helps
Side income (freelance, rental)	Covers tax on non-employment income at source
Investment income (interest, investments)	Avoids large balance owing
Prior year balance owing was large	Smooths out periodic payments vs lump sum at filing
Spousal income changed	Recalibrates household withholding

Enter the additional amount per pay period. Your employer has no obligation to withhold more than is legally required — but most will honour this request.

TD1 vs T1 Return: Key Difference

Document	Purpose	When submitted
TD1	Tells employer how much to withhold from each paycheque	When starting a job or when situation changes
T1 Return	Reports actual annual income and calculates final tax	Filed annually by April 30

The TD1 is an estimate-based withholding form. Your T1 is the final reckoning. If your TD1 overstates your credits, you’ll owe at tax time. If it understates, you’ll get a refund. Accurate TD1 completion minimizes the refund-or-owe surprise.

Bottom Line

Fill out your TD1 accurately when starting a job and update it whenever your situation changes. If you have two simultaneous jobs, only claim credits at one. Use the additional withholding line if you expect income beyond your employment. A correctly completed TD1 means your projected withholding matches your actual tax liability — no surprise balance owing in April.

When to update your TD1

You only need to submit a new TD1 when your personal situation changes in a way that affects your expected credits. Common triggers:

Life event	TD1 update needed?
Marriage or common-law partnership	Yes — may add spousal amount
Child born or adopted	Yes — caregiver amounts may apply
Spouse starts working full-time	Yes — remove spousal claim
Disability Tax Credit approved	Yes — add the disability amount
Child turns 18	Yes — some credits change
Start second job	Yes — claim $0 or reduce amount at new job
Significant income drop	Yes — consider increasing credits

There is no deadline for updating — submit the updated form to your employer’s payroll department as soon as your situation changes to minimize under- or over-withholding.

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