T4 Deadline March 2, 2026: What to Do If Your T4 Is Late, Missing, or Wrong (Employee Checklist)

Waiting on a T4 and feeling stuck?
You’re not alone — and you don’t have to panic-file (or wait forever). In 2026, the CRA states the 2025 T4 filing due date is March 2, 2026. That date matters because it affects how quickly you can file, get a refund, and keep benefits/credits on track.

This guide is a practical employee playbook for three situations: late T4, missing T4, or a wrong T4 — with a checklist you can run in under 15 minutes.

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45-second summary

• T4 deadline: The CRA lists March 2, 2026 as the 2025 T4 filing due date. The CRA also notes that if a due date falls on a weekend/holiday, it moves to the next business day. (CRA RC4120)
• If your T4 is missing: Ask the employer first, then check CRA My Account after the issuer submits it. (CRA: Get a copy of your slips)
• If you still don’t have it: You can estimate income using pay stubs and file on time, then correct later. (CRA: Missing a tax slip)
• If your T4 is wrong: Request an amended T4 from the employer (don’t “guess” fixes in your return).

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What is the T4 deadline in 2026 (for 2025 income)?

The CRA’s employer guide states: “For most people, the 2025 T4 filing due date is March 2, 2026.” It also explains that when the due date falls on a Saturday, Sunday, or CRA-recognized public holiday, the return is due the next business day. (CRA RC4120)

Separately, the CRA notes employers must provide employees their T4s by the last day of February following the calendar year, and late delivery can trigger penalties for the employer. (CRA RC4120)

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Employee Checklist: If your T4 is late (but probably coming)

Step 1) Check your employer portal first

Many employers post T4s inside payroll/HR platforms before they mail them. Search your email for “T4” + your employer name and check your HR portal downloads.

Step 2) Contact payroll with one clear request

Send a short message: “Can you confirm when my 2025 T4 will be issued and whether it will be delivered by mail or portal?”

Step 3) Look in CRA My Account (after the issuer submits)

The CRA explains it can’t provide a copy of your slip until the issuer sends it to the CRA. Once submitted, you may be able to view it online via My Account. (CRA: Get a copy of your slips)

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If your T4 is missing (or your employer is unresponsive)

1) Don’t delay forever — file with the best info you have

The CRA provides an option to estimate your income without tax slips if a slip is missing. Use your final pay stub(s), year-end payroll summary, bank deposits, and any ROE/pay statements to estimate employment income and deductions. (CRA: Missing a tax slip)

2) Save your evidence (this is what protects you)

• Final pay stub(s) showing year-to-date totals
• Any employer year-end statement (income + deductions)
• Email(s) showing you requested the T4
• Bank deposit history (if needed)

3) When the T4 arrives, correct your return

If your estimated amounts differ from the eventual T4, update your return using your tax software’s amendment process or CRA change options (your software may support ReFILE; otherwise use CRA services to request a change).

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If your T4 is wrong (the most dangerous scenario)

A wrong T4 can cause reassessments, refund delays, or benefit recalculations. Treat this as a “fix the document” issue — not a “patch the tax return” issue.

Quick checks before you escalate

• Compare Box 14 (Employment income) to your final pay stub year-to-date earnings
• Compare Box 22 (Income tax deducted) to year-to-date taxes withheld
• Check CPP/EI totals (Boxes 16/18) vs pay stub
• Confirm your SIN and employer name/address

What to do next (in order)

1. Contact payroll and request an amended T4 (include your comparison numbers).
2. Ask for written confirmation that an amended slip will be filed and when.
3. Do not “split the difference” or invent figures to match your expectation.
4. If you must file before the amended slip arrives, file using the best available accurate records, then update when the amended T4 is issued.

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Common mistakes that delay refunds

• Filing too early without key slips (then needing multiple corrections)
• Relying only on CRA My Account when the issuer hasn’t submitted yet
• Ignoring a wrong T4 and “hoping CRA won’t notice”
• Not keeping pay stubs/backup proof for missing-slip estimates

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FAQ

When is the T4 deadline for 2025 income?
The CRA’s employer guide states the 2025 T4 filing due date is March 2, 2026, and it explains weekend/holiday due dates roll to the next business day. (CRA RC4120)

Can CRA give me my T4 if my employer won’t?
The CRA notes it cannot provide a copy until after the issuer sends it to the CRA. Once submitted, you may be able to view it in My Account. (CRA: Get a copy of your slips)

What if I still don’t have my T4 by the time I want to file?
The CRA provides guidance to estimate your income without tax slips using your records and file on time, then correct later if needed. (CRA: Missing a tax slip)

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Conclusion: Your “no-stress” plan

If your T4 is late: check employer portal → email payroll → monitor CRA My Account.

If your T4 is missing: file using pay stubs and backups, then update when the slip arrives.

If your T4 is wrong: demand an amended T4 and keep written proof.

That’s the fastest way to protect your refund timing and avoid a tax-season mess.

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Sources (official first)

• CRA: Employers’ Guide – Filing the T4 Slip and Summary (2025 due date: March 2, 2026; employee delivery rules; weekend/holiday rule)
• CRA: Tax slips — Get a copy of your slips (missing slips, My Account, estimate income option)