What is the T1 General tax return?

The T1 General is the standard federal income tax return form that Canadian individuals file each year with CRA. It is the document most people mean when they say "filing my taxes." The T1 organizes your income, deductions, and credits in a standardized sequence to arrive at your taxable income and final tax. Your T1 return includes the T1 form itself (federal) plus provincial pages and any applicable schedules. Most Canadians file electronically using NETFILE-certified tax software — the software generates the T1 data from your inputs.

Do you have to file a T1 if you have no income?

You are not legally required to file if you have no income and no tax owing — but you should file anyway. Filing triggers benefit entitlement: the GST/HST credit, Canada Child Benefit, provincial benefits like the Ontario Trillium Benefit, and the Canada Carbon Rebate are all determined by your filed return. Filing also allows RRSP room to accumulate (based on earned income), establishes TFSA room formally in CRA's records, and prevents complications if you later receive income that must be reported. The filing deadline is April 30 (or June 15 for self-employed).

What is the difference between income, net income, and taxable income on the T1?

The T1 separates three income concepts: Total income is the gross sum of all income from all sources (Lines 10100–14600). Net income is total income minus "above-the-line" deductions such as RRSP contributions, union dues, child care expenses, and employment expenses (Lines 20400–23600). Taxable income is net income minus further deductions such as capital gains exemptions, loss carry-forwards, and northern residents deductions (Lines 24400–26000). Federal tax is calculated on taxable income. Many credits and benefits are calculated using net income — so net income matters even if you owe no tax.

What are the most important line numbers on the T1?

The most referenced T1 lines are: Line 10100 (employment income from T4), Line 12100 (interest and dividend income), Line 12700 (taxable capital gains), Line 15000 (total income), Line 23600 (net income — key for benefit calculations), Line 26000 (taxable income — what tax is calculated on), Line 42000 (net federal tax), Line 43500 (total payable), Line 47600 (tax deducted at source), Line 48200 (refund) or Line 48500 (balance owing). Net income (Line 23600) is particularly important as it determines eligibility and amounts for GST/HST credits, OAS clawback, spousal amounts, and many other credits.

What schedules do I need to attach to my T1?

Common T1 schedules include: Schedule 1 (federal non-refundable tax credits — personal amounts, age credits, pension credits), Schedule 3 (capital gains and losses), Schedule 4 (statement of investment income), Schedule 7 (RRSP and PRPP contributions and carry-forward amounts), Schedule 9 (charitable donations and gifts), Schedule 11 (federal tuition and enrolment amounts), and Schedule 14 (Canada Workers Benefit advance payments). Provincial returns have their own schedules. Electronic filing software handles which schedules apply automatically based on your inputs.

When is the T1 filing deadline and what happens if I miss it?

The T1 filing deadline is April 30 for most individuals. If you or your spouse/common-law partner is self-employed, the deadline extends to June 15 — but any balance owing is still due by April 30. Missing the deadline when you have a balance owing triggers a 5% late-filing penalty on the outstanding amount, plus 1% per full month late (up to 12 months). If CRA issued a late-filing demand and this is a repeat late filing, the penalty rises to 10% plus 2% per month for up to 20 months. Interest at the prescribed rate (currently 9% daily compound) also accrues on any balance owing from May 1.

What Is a T1 General Tax Return in Canada?

Short Answer

The T1 General is your annual federal income tax return. It works through four stages: reporting all income, subtracting deductions to reach net income and taxable income, calculating tax on taxable income, and applying credits and payments to find your refund or balance owing. Understanding the key line numbers helps you verify your return and plan for next year.

T1 Structure: Four Stages

Stage	Line range	What happens
Step 1: Income	10100–14600	Report all income from all sources
Step 2: Deductions from total income	20400–23600	Subtract RRSP, child care, employment expenses, etc. → Net income
Step 3: Deductions from net income	24400–26000	Apply carry-forwards and special deductions → Taxable income
Step 4: Tax and credits	40400–48500	Calculate federal tax, apply credits, subtract withholdings → Refund or balance

Key T1 Line Numbers

Income Lines (Step 1)

Line	Income type	Source
10100	Employment income	T4 Box 14
10400	Other employment income	Tips, gratuities
11300	OAS pension	T4A(OAS)
11400	CPP/QPP benefits	T4A(P)
11500	Other pensions	T4A pension income
11900	Employment Insurance benefits	T4E
12000	Taxable dividends (eligible + non-eligible)	T5, T3, T4PS
12100	Interest and other investment income	T5 Box 13
12700	Taxable capital gains	Schedule 3
13000	Other income	Various sources
13010	Taxable scholarships/bursaries	T4A Box 105
13500	Net self-employment income	T2125
14100	Workers’ Compensation	T5007
14400	Net federal supplements	T4A(OAS) Box 21
15000	Total income	Sum of all income lines

Deduction Lines (Step 2 — Total to Net Income)

Line	Deduction	Notes
20700	Registered pension plan deduction	T4 Box 20
20800	RRSP/PRPP deduction	Based on Schedule 7 + room limit
21200	Annual union, professional dues	T4 Box 44
21300	Universal Child Care Benefit repayment	If required
21400	Child care expenses	Form T778
21900	Moving expenses	Form T1-M (eligible moves)
22000	Support payments made	Eligible maintenance payments
22100	Carrying charges and interest expense	Form T1-MAG
22900	Other employment expenses	Form T777
23200	Other deductions	e.g., repaid amounts
23600	Net income	Used for benefit calculations

Further Deduction Lines (Step 3 — Net to Taxable Income)

Line	Deduction	Notes
24400	Military/police deduction	Deployed personnel
24900	Security options deduction	Employee stock options, 50%
25000	Other payments deduction	Social assistance, workers comp from income
25100	Limited partnership losses (prior year)	Carry-forward
25200	Non-capital losses (prior year)	Carry-forward
25300	Net capital losses (prior year)	Carry-forward
25400	Capital gains deduction	LCGE (lifetime capital gains exemption)
25500	Northern residents deduction	Form T2222
26000	Taxable income	Federal tax calculated on this amount

Tax Calculation (Step 4)

Line	Amount	Notes
40400	Net federal tax	Based on federal tax brackets and Schedule 1
40900	CPP contributions on self-employment	Schedule 8
41000	Employment Insurance premiums (self-employed)	Form T1028
41400	Canada Workers Benefit (CWB)	Refundable credit for low-income workers
41800	Special taxes	RRSPs, HBP repayment arrears, etc.
42000	Net federal tax payable	After federal non-refundable credits from Schedule 1
42800	Provincial or territorial tax	Provincial return results
43500	Total payable	Federal + provincial + any special taxes
47600	Total income tax deducted at source	From T4 Box 22, T5 Box 16, other slips
47900	Provincial/territorial credits	Refundable provincial credits
48200	Refund	If withholdings > total payable
48500	Balance owing	If total payable > withholdings

2025 Federal Tax Brackets (Applied to Taxable Income — Line 26000)

Taxable income	Federal tax rate
$0–$57,375	15%
$57,376–$114,750	20.5%
$114,751–$158,519	26%
$158,520–$220,000	29%
Over $220,000	33%

Federal tax from the brackets is then reduced by non-refundable credits from Schedule 1 (personal amounts, age credit, disability credit, etc.).

Net Income vs Taxable Income: Why Net Income Matters

Benefit / credit	Based on which income figure?
GST/HST credit	Net income (Line 23600)
Canada Child Benefit	Adjusted family net income
OAS clawback (repayment)	Net income (Line 23600)
Spousal/dependant amounts	Spouse’s net income
Medical expense threshold	Net income (3% of Line 23600)
RRSP contribution room	Earned income (a subset of total income)
Ontario Trillium Benefit	Adjusted net income
Disability tax credit eligibility	Net income

Lowering net income (through RRSP contributions, union dues, child care, etc.) increases benefit amounts even if you have no tax balance to reduce.

Common T1 Mistakes

Mistake	Consequence
Missing T3 or T5 slips	CRA auto-assesses missing income — reassessment + potential penalties
Wrong RRSP deduction (over-contributed)	1% per month penalty on excess
Forgetting carry-forward tuition credits	Miss the deduction — claim via T1-ADJ within 10 years
Claiming the same credit at two T4 employers (TD1)	Under-withholding — balance owing
Not reporting foreign income	CRA has information-sharing agreements with dozens of countries
Wrong marital status	Affects spousal amounts, CCB, GST/HST credit

Bottom Line

The T1 General is the foundation of Canadian personal taxation — every income, deduction, and credit flows through its 4-step structure. Net income (Line 23600) is one of the most consequential figures on the return, affecting your refund, benefit eligibility, and spousal calculations simultaneously. File electronically via NETFILE before April 30, and verify your return through My CRA Account once processed.