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T4 slip explained box by box (2026)

2026-11-09

Short answer The T4 reports what your employer paid you and withheld in a calendar year, for your federal return. Box 14 (employment income) goes on line 10100 and box 22 (tax withheld) on line 43700. Box 40 is already included in box 14, and box 52 is not income: it reduces next year’s RRSP room. In Québec you also get an RL-1, and the two slips rarely match exactly.

The T4, Statement of Remuneration Paid, is the federal slip that shows what an employer paid you and withheld from your pay in a calendar year. You use it for your federal return (T1). This guide explains every box on the 2026 T4, the “Other information” codes you are likely to see, where each amount goes on the T1, the boxes that matter in Québec, and what employees and employers should do when a slip is late or wrong. It follows the CRA’s employer guide RC4120 (Rev. 25, the current edition).

What is a T4 slip?

Every employer that pays salary, wages, bonuses, vacation pay, commissions or taxable benefits issues a T4 for each employee. The CRA gets a copy, and many of the amounts are pre-loaded into your CRA account for filing. If you worked in more than one province, you get a separate T4 for each one. If you worked in Québec, you also get a relevé 1 (RL-1) for your Québec return, explained in our RL-1 box-by-box guide.

When will I get my 2026 T4?

Employers must give you your T4 by the last day of February. For 2026 slips, February 28, 2027 is a Sunday, so the CRA deadline moves to Monday, March 1, 2027. Once your employer files, the slip usually appears in your CRA My Account. Employers can email it only with your written consent, or post it on a secure portal, and must give you a paper copy if you ask.

T4 boxes explained

Each numbered box reports one amount. Lines are on the 2026 T1; tax software fills most of them for you.

BoxWhat it meansWhere it goes on the T1Notes
10Province or territory of employmentNot entered“QC” means Québec deductions applied; you also get an RL-1
12Your social insurance numberNot enteredCheck it; if it’s wrong, your employer must correct the slip
14Employment income before deductions, including taxable benefitsLine 10100Add box 14 from all your T4s
16CPP contributions (outside Québec)Base part: credit, line 30800; first additional part: deduction, line 22215Split through Schedule 8 or Form RC381
16ASecond additional CPP contributions (CPP2)Deduction, line 22215Only on earnings between the two ceilings
17QPP contributions (Québec)Same split as box 16: line 30800 and line 22215Matches RL-1 box B.A
17ASecond additional QPP contributions (QPP2)Deduction, line 22215Matches RL-1 box B.B
18Employment Insurance premiumsLine 31200 (Québec residents use Schedule 10)Overpayments are refunded at line 45000
20Registered pension plan contributionsDeduction, line 20700Employer RRSP or FHSA contributions are code 40, not box 20
22Income tax deductedLine 43700For Québec employees, federal tax only; Québec tax is on RL-1 box E
24EI insurable earningsUsed to check your EI premiums2026 maximum $68,900; never blank (“0” if none)
26CPP or QPP pensionable earningsUsed to check your CPP or QPP2026 maximum $85,000; excludes pay before you turned 18 and after 70
28Exempt from CPP/QPP, EI or PPIPNot enteredAn X means no deductions for the whole period
29Employment codeNot enteredFor example 11 (placement agency), 12 (taxi driver), 13 (barber or hairdresser)
44Union duesLine 21200Only when the union issues no separate receipt
45Employer-offered dental benefits (code 1 to 5)Not an amountUsed for Canadian Dental Care Plan eligibility
46Charitable donations deducted from your payDonations, Schedule 9 (line 34900)Add your other donations
50RPP or DPSP registration numberNot enteredSeven digits
52Pension adjustment (PA)Line 20600 (not income)Reduces next year’s RRSP room
54Employer’s payroll account numberNot enteredNot shown on your copy
55PPIP premiums (QPIP, Québec)Line 31205 (Schedule 10)Matches RL-1 box H
56PPIP insurable earningsUsed on Schedule 102026 maximum $103,000; matches RL-1 box I

T4 box 14: why it doesn’t match your salary

Box 14 is your gross pay plus every taxable benefit, before any deduction. That is why it is often higher than your salary, and why the contributions you make through payroll (RRSP, pension, union dues) don’t lower it. Retiring allowances are not in box 14; they appear under codes 66 and 67.

Example (2026)AmountWhere on the T4
Salary$60,000Box 14
Employer-paid group term life insurance$300Box 14 and code 40
Taxable parking$1,200Box 14 and code 40
Personal use of a company car$2,400Box 14 and code 34
Box 14 total$63,900Code 40 shows $1,500

T4 box 40: other taxable allowances and benefits

Box 40 (code 40 in the Other information area) shows taxable benefits that have no code of their own: group term life insurance, parking, gifts above the tax-free limit, some allowances, and RRSP or FHSA contributions your employer made for you. The amount is already included in box 14. Don’t add it to your income a second time. If your employer contributed to your group RRSP, that contribution is in code 40 and box 14, and your RRSP receipt lets you deduct it.

T4 box 44: union dues

Box 44 shows union dues withheld from your pay, and you deduct them on line 21200. Employers use this box only when they and the union agree that the union will not issue receipts. If you also paid professional dues yourself, add them with your receipts.

T4 box 52: the pension adjustment

Box 52 is the value of the pension benefits you earned in your employer’s registered pension plan or deferred profit sharing plan during the year. It is not income and not a deduction, so it doesn’t change your refund. It reduces your RRSP deduction limit for the following year, because you are already saving for retirement through the plan. If you have a defined benefit plan, a large box 52 is normal.

T4 boxes 24 and 26: insurable and pensionable earnings

Box 24 shows the earnings your EI premiums were calculated on, and box 26 the earnings your CPP or QPP contributions were calculated on. Neither goes on your return directly, but both are used to check whether you overpaid. For 2026, insurable earnings are capped at $68,900, pensionable earnings at $85,000 and PPIP insurable earnings (box 56) at $103,000. If you had two employers, each one deducted from the first dollar, so you may have overpaid; the return refunds the excess (EI at line 45000).

The Québec boxes on the T4

  • Box 10 “QC”: you worked in Québec, so you pay QPP instead of CPP and QPIP on top of a reduced EI rate.
  • Boxes 17 and 17A: your QPP contributions. For 2026, employees pay 6.30% on earnings between $3,500 and $74,600 (maximum $4,479.30) and 4% on earnings between $74,600 and $85,000 (maximum $416).
  • Box 18: EI at the Québec rate of 1.30% for 2026, up to $895.70.
  • Boxes 55 and 56: QPIP at 0.430% on up to $103,000 (maximum $442.90). Québec residents claim it through Schedule 10.
  • Box 22: federal tax only. Québec tax withheld is on RL-1 box E and goes on your TP-1.

“Other information” codes you are likely to see

Codes without a box of their own appear in the Other information area. A slip holds up to six codes; more means a second slip.

CodeWhat it meansIncluded in box 14?Where it goes
30Housing, board and lodgingYesAlready in line 10100
31Special work siteNoNot taxable
32Travel in a prescribed zoneYesMay support the northern residents deduction
33Medical travel assistanceYes, through code 32The medical part of the code 32 amount; don’t add it again. May support the northern residents deduction
34Personal use of employer’s automobileYesAlready in line 10100
36Interest-free or low-interest loanYesAlready in line 10100
38Security options benefitsYesAlready in line 10100
39, 41Security options deductionsNoDeduction, line 24900
40Other taxable allowances and benefitsYesAlready in line 10100
42Employment commissionsYesAlso shown on line 10120
43Canadian Armed Forces and police deductionYesDeduction, line 24400
66, 67Eligible and non-eligible retiring allowancesNoLine 13000; eligible part can go to an RRSP
71Indian Act exempt employment incomeNoNot taxable
77Workers’ compensation benefits repaid to the employerNoDeduction, line 22900
78 to 80Fishers: gross income, net partnership amount, shareperson amountNoFishing income (Form T2121)
81 to 83Placement agency workers, taxi drivers, barbers and hairdressersNoBusiness income (Form T2125)
85Employee-paid premiums for private health services plansNoMedical expenses, line 33099
87Emergency services volunteer exempt amount (up to $1,000)NoLine 10105

For 2026 slips, security options are reported only with codes 38, 39 and 41. Codes 57 to 60 were used only for 2020 pandemic periods.

T4 box 45: dental benefit codes

CodeMeaning on December 31
1Not eligible for any dental coverage offered by the employer
2Employee only
3Employee, spouse or common-law partner, and dependent children
4Employee and spouse or common-law partner
5Employee and dependent children

The code shows access to coverage, not whether you used it or opted out. It is used to check eligibility for the Canadian Dental Care Plan.

T4 vs RL-1: box-by-box comparison

ItemT4 (federal)RL-1 (Québec)
Employment incomeBox 14Box A (often higher)
QPP base and first additionalBox 17Box B.A
QPP second additionalBox 17ABox B.B
CPP (worked outside Québec)Boxes 16 and 16ACodes B-1 and B-2
EI premiumsBox 18Box C
EI insurable earningsBox 24None
Pensionable earningsBox 26Box G
RPP contributionsBox 20Box D
Income tax withheldBox 22 (federal)Box E (Québec)
Union duesBox 44Box F
Donations through payrollBox 46Box N
Pension adjustmentBox 52None
QPIP premiums and insurable earningsBoxes 55 and 56Boxes H and I
Employer-paid health and dental premiumsNot taxableBox J (taxable, in A)
Other taxable benefitsCode 40 (in box 14)Box L (in A)
Board and lodging; personal use of carCodes 30 and 34Boxes V and W
CommissionsCode 42Box M
Employee-paid health premiumsCode 85Code 235
Retiring allowanceCodes 66 and 67Box O, code RJ
Exempt income on a reserveCode 71Box R
Dental coverage codeBox 45None
Filed withCRARevenu Québec
DeadlineLast day of February, next business day if it falls on a weekend or holidayLast day of February, next working day if it falls on a Sunday or holiday
Online filing requiredMore than 5 slipsMore than 5 slips
Late-filing penalty$10 to $75 a day depending on the number of slips (minimum $100, maximum $7,500)$25 a day, up to $2,500

For more on employer obligations for both slips, see our RL-1 vs T4 overview.

My T4 is missing or wrong: what should I do?

  • Missing: check your CRA My Account first, then ask your employer, and confirm they have your current address. If you still can’t get it, estimate your income and deductions from your last pay stub and keep a note of your requests. File on time anyway to avoid late-filing penalties.
  • Wrong: ask your employer for an amended T4. If it arrives after you filed, we request a change to your return.
  • Several employers: enter each T4 separately; the CRA matches every slip it receives. Add box 22 from all of them for your total tax withheld.

For employers: filing T4 slips

  • Deadline: file the T4 slips and summary and give employees their copies by the last day of February. For 2026 slips, that is March 1, 2027. If the business stops operating, the deadline is 30 days after.
  • Electronic filing: more than five slips must be filed electronically (Internet file transfer in XML or Web Forms). Five or fewer can be filed on paper.
  • Distribution: email only with the employee’s written consent; a secure portal is allowed; paper on request.
  • Dental code: box 45 is mandatory. A blank or wrong code can cost $100 per slip.
  • Boxes 24 and 26 must never be blank. Enter “0” when there are no insurable or pensionable earnings.

What are the penalties for late or missing T4 slips?

Slips filed latePenalty per dayMaximum
1 to 50$10$1,000
51 to 500$15$1,500
501 to 2,500$25$2,500
2,501 to 10,000$50$5,000
10,001 or more$75$7,500

The minimum late-filing penalty is $100. Not filing electronically when required costs $125 (6 to 50 slips) up to $2,500 (2,501 or more), and not giving an employee their slip costs $25 a day per slip, from $100 to $2,500.

How do I amend a T4?

File amended slips on paper or electronically after the original return. Amended and original slips go in separate returns, every box must show the corrected total (not the difference), and negative amounts are not allowed. Give the employee a copy of the amended slip. If you also issued an RL-1, amend it with Revenu Québec too; our RL-1 guide explains the “Modifié” process.

Need help with your T4 or year-end payroll?

For employees, we prepare personal returns from $300, and a tax professional reviews every return; see personal tax returns, our Québec personal tax return guide or our guide for newcomers. For employers, our payroll service is $75 a month for 1 to 5 employees, including pay runs, source deductions and T4 and RL-1 slips; see our payroll checklist, year-end tax planning checklist, pricing or contact us. This guide is general information; talk to us about your situation.

Frequently asked questions

What is a T4 slip?

It is the federal slip, Statement of Remuneration Paid, that reports your employment income, taxable benefits and deductions for a calendar year. Your employer files it with the CRA and gives you a copy for your T1 return.

What is box 14 on a T4?

Your total employment income before deductions, including taxable benefits such as codes 30, 34, 36 and 40. You report it on line 10100, adding box 14 from all your T4 slips.

Do I add box 40 to my income?

No. Box 40 (other taxable allowances and benefits) is already included in box 14. It is shown separately for information only.

What is box 52, the pension adjustment?

It is the value of the pension benefits you earned in your employer’s pension plan or DPSP. It is not income and doesn’t change your refund, but it reduces your RRSP deduction limit for the next year.

What is box 44 on a T4?

Union dues withheld from your pay, used when the union doesn’t issue separate receipts. You deduct them on line 21200.

Why don’t my T4 and RL-1 match?

Québec taxes some benefits that Ottawa doesn’t, mainly employer-paid health and dental premiums (RL-1 box J), so RL-1 box A is often higher than T4 box 14. Tax withheld also differs: federal on the T4, Québec on the RL-1.

When is the T4 deadline for 2026 slips?

The last day of February, which for 2026 slips moves to Monday, March 1, 2027 because February 28, 2027 is a Sunday. Employees must receive their copies by the same date.

What is the penalty for filing T4 slips late?

From $10 a day (1 to 50 slips, up to $1,000) to $75 a day (10,001 or more, up to $7,500), with a $100 minimum. Separate penalties apply for not filing electronically and for not giving employees their slips.

Sources

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