Yes, you can file your Canadian tax return without a T4 slip, and the Canada Revenue Agency expects you to do exactly that rather than miss the April 30 deadline. Filing taxes without a T4 means estimating your employment income from pay stubs or bank records, submitting your return on time, and correcting the numbers later once the slip arrives. Waiting for a missing T4 is one of the most common reasons people file late and trigger penalties that were entirely avoidable.
Try to Get the Slip First
Employers are required to issue T4 slips by the end of February. If yours hasn’t arrived by mid-March, contact the payroll department and ask them to reissue it, ideally as a PDF.1Canada Revenue Agency. Tax Slips: Get a Copy of Your Slips
Your other option is CRA My Account, the online portal where you can view electronic copies of T4 slips that employers have already submitted to the CRA.2Canada Revenue Agency. About My Account – CRA Account Help The catch: the CRA cannot show you a slip until the employer has actually filed it. If your employer is late submitting to the CRA, the slip won’t appear online either. If you use a tax professional, they can access your slips through the Represent a Client portal.3Canada Revenue Agency. Sign In to Your CRA Account
The CRA’s own guidance on line 10100 says to contact your employer if you haven’t received your T4 by early April.4Canada Revenue Agency. Line 10100 – Employment Income If that conversation goes nowhere and the deadline is approaching, move on to estimating.
How to Estimate Your Income Without a T4
Your year-end or final pay stub is the single most useful document when your T4 is missing. Most employers include a cumulative summary showing year-to-date gross earnings, income tax withheld, Canada Pension Plan contributions, and Employment Insurance premiums. Those running totals on your last pay stub of the year are usually close to what the T4 would show.
If you don’t have the final pay stub, bank statements are your fallback. Add up every deposit from that employer during the calendar year to get your total net pay. The gap between gross and net represents your combined deductions, though isolating tax withheld from CPP and EI takes some math. If your paycheques were consistent, multiplying a single period’s deductions by the number of pay periods gets you a reasonable estimate.
The CRA specifically endorses this approach. Their guidance says to add up your pay stubs or financial statements to estimate income, and to include a note with your return stating the employer’s name and address, the type of income involved, and what steps you’ve taken to get the actual slip.1Canada Revenue Agency. Tax Slips: Get a Copy of Your Slips Report your estimated gross employment income on line 10100 of your return, which is where box 14 of the T4 would normally go.5Canada Revenue Agency. T4 Slip: Statement of Remuneration Paid
One practical tip: slightly overestimating your income is safer than underestimating it. If your estimate turns out higher than the actual T4, you’ll get a refund after you amend. If you underestimate, you’ll owe a balance plus interest dating back to April 30.
Filing the Return With Estimated Figures
You can file electronically or on paper. NETFILE, the CRA’s electronic filing system, opened for the 2025 tax year on February 23, 2026, and accepts returns through certified tax software.6Canada Revenue Agency. Find Certified Tax Software Enter your estimated income and deduction amounts directly into the software. Keep all your pay stubs and notes in case the CRA asks to see them later.1Canada Revenue Agency. Tax Slips: Get a Copy of Your Slips
If you file on paper, attach copies of the pay stubs or financial statements you used to build your estimates, along with a signed note explaining what happened. Mail everything to your assigned tax centre. Either way, save your confirmation number or proof of mailing. Once the CRA processes your return, they’ll issue a Notice of Assessment showing their calculation of tax owed or refund.
What Filing Late Actually Costs
The Income Tax Act requires most individuals to file by April 30 of the following year. If you’re self-employed or the spouse of someone who is, the filing deadline extends to June 15, though any balance owed is still due by April 30.7Justice Laws Website. Income Tax Act RSC 1985 c 1 (5th Supp) – Section 150
Miss the deadline with a balance owing and the penalty is immediate: 5% of your unpaid tax, plus 1% for each full month the return stays outstanding, up to 12 months. That’s a maximum penalty of 17% of the unpaid balance in the first year. If you’ve been penalized for late filing in any of the three preceding tax years, the repeated failure penalty jumps to 10% of the unpaid balance plus 2% per month for up to 20 months, reaching a possible 50%.8Justice Laws Website. Income Tax Act RSC 1985 c 1 (5th Supp) – Section 162
On top of penalties, the CRA charges compound daily interest on any unpaid balance. For the second quarter of 2026, that rate is 7%.9Canada Revenue Agency. Interest Rates for the Second Calendar Quarter Interest starts accruing the day after your balance was due, and it applies to both the unpaid tax and the late-filing penalty itself. Filing with imperfect numbers and correcting later costs you nothing. Filing late with perfect numbers costs you real money.
Benefits That Stop If You Don’t File
Even if you owe nothing, skipping your return can cost you. The GST/HST credit is calculated automatically when the CRA assesses your return each year. You don’t apply for it, but you do need to file. If you file late, your quarterly payments may stop until the CRA processes your return.10Canada Revenue Agency. How to Get the Credit – GST/HST Credit The same applies to the Canada Child Benefit and other income-tested benefits that rely on your assessed return. People who expect refunds sometimes assume there’s no rush, but without an assessed return, the quarterly payments simply stop.
Correcting Your Return After the T4 Arrives
When the actual T4 shows up, compare it to your estimates. If the numbers match, you’re done. If they don’t, amend. Do not file a second full return; that creates processing confusion and delays.
You must wait until you receive your Notice of Assessment before requesting any changes.11Canada Revenue Agency. Changing a Tax Return Once you have it, there are three ways to amend.
- Change My Return online. Sign into your CRA account, select “Tax returns,” and use the “Change my return” feature to update specific lines. This is the fastest option, with typical processing of about two weeks for straightforward adjustments.11Canada Revenue Agency. Changing a Tax Return
- ReFILE through tax software. If you originally filed using certified NETFILE software, you can use the ReFILE feature to transmit corrections electronically. It can’t be used for bankruptcy returns, non-resident returns, or tax years before 2021.11Canada Revenue Agency. Changing a Tax Return
- Form T1-ADJ by mail. Complete the T1 Adjustment Request and mail it to your tax centre with a copy of the T4. Processing by mail typically takes about eight weeks.12Canada Revenue Agency. T1-ADJ T1 Adjustment Request
Those processing times apply to straightforward adjustments. Complex requests involving multiple tax years, carryback amounts, deceased taxpayers, or additional documentation can take up to 45 weeks.11Canada Revenue Agency. Changing a Tax Return A simple T4 correction on a single line shouldn’t fall into that category.
If the amendment results in additional tax owing, the CRA charges interest on that amount retroactively from the original April 30 due date. If you overestimated your income in the original filing, the reassessment will generate a refund for the difference. Include a brief note explaining that you originally filed with estimates due to a missing T4, and that the slip has since been received. Clear context helps the assessor process the change without requesting further documentation.