Updated Checked by the Tax-Services.ca editorial team How we check
To file a tax return in Canada for 2025, you send it to the CRA by 30 April 2026, and you pay anything you owe by the same day. If you or your partner ran a business, the filing date moves to 15 June, but the payment date doesn’t move.
When is a Canadian tax return due?
These are the dates the CRA published for the 2025 return. We couldn’t find dates for the 2026 return yet, and the CRA usually posts them later, so check its important dates page in the new year.
| Who | File by | Pay by |
|---|---|---|
| Most people | 30 April 2026 | 30 April 2026 |
| Self-employed (or married to someone who is) | 15 June 2026 | 30 April 2026 |
Online filing for the 2025 return opened on 23 February 2026. If a date lands on a weekend or holiday, the CRA treats the next business day as on time. The CRA’s own 2026 tax-filing season notice lists these three dates side by side.
What do you need before you start?
Your slips, first. T4 for pay, T5 for investment income, and whatever else arrived in the mail or in your CRA account. Then the paper for anything you plan to claim, like donation receipts, tuition forms and medical bills. The CRA says the same to anyone using a preparer: bring the slips, the receipts for credits and deductions, and anything else that backs up the return.
Here’s a trick that saves an hour: make one folder, paper or on your computer, and drop things in all year. Come tax time, Priya in Winnipeg just opens the folder instead of tearing the house apart for a physio receipt.
Got nothing to report? File anyway. Late returns can interrupt the GST/HST credit, the Canada child benefit and Old Age Security, and that’s a bad trade for a form you can often finish in one sitting.
Refund or balance owing?
It comes down to one subtraction: the tax you owe for the year minus the tax already taken off your pay. Our tax refund calculator puts income tax on $75,000 of Ontario employment income at $12,704.65. If your T4 shows $13,000 withheld, you’d get about $295.35 back. If it shows $11,000, you’d owe about $1,704.65.
That’s the simple case, one job and no claims. Deductions such as an RRSP contribution lower the bill, and the income tax calculator shows how much for your province.
Odd year? A bonus or a second job can change the result, so run the numbers again.
How do you actually file the return?
There are three routes. You can use certified tax software and send the return online, take your papers to a preparer who files it for you, or go to a free clinic if your income is modest and your return is simple. The CRA runs the clinic program with volunteers and calls it the Community Volunteer Income Tax Program.
Software is fine for most employees. A preparer starts to earn their fee when you have rental income, a business, or a sale of property. If you use one, the CRA says you sign a form (T183) that lets them send the return electronically. Read what you sign, since your name is on the return.
What happens after you file?
The CRA processes the return and issues a notice of assessment, which you’ll find in your CRA account. It’s the final word on your refund or balance. Keep it with your records, because it also shows your RRSP deduction limit for next year. If it doesn’t match what you filed, read the explanation on it before you pay or panic.
What if you miss the deadline?
File as soon as you can. If you owe tax, a late return is charged 5% of the balance, plus 1% for each full month it’s late, up to 12 months, and interest on top. On the $1,704.65 owing above, a return three months late would cost about $136 in penalty ($1,704.65 x 8%), before interest. If you’re owed a refund, there’s no late-filing penalty, though your benefits may be held up until you file.
Mistakes that cost you money or time
- Waiting for the April rush and missing a slip that arrives late.
- Filing on time and not paying. The CRA says to file early or by the due date to avoid interest and penalties, and the payment date is the same 30 April.
- Forgetting that the tools here estimate only. Your notice of assessment is the final word.
The take-home pay calculator is useful in the other direction, as a check that your paycheque withholding is close to your real tax.
Sources, and how we checked them
Filing and payment dates are from the CRA‘s page for the 2025 tax return. The clinic and preparer details come from the CRA’s pages on free tax clinics and on using a professional tax preparer. Tax figures in the example are from our 2026 calculator tables, checked in September 2026. We’re an independent guide, not part of the CRA.
Frequently asked questions
When is my Canadian tax return due?
For the 2025 return, 30 April 2026 for most people and 15 June 2026 if you or your partner were self-employed. Any balance is still due 30 April.
Do I have to file if I had no income?
Filing keeps benefits such as the GST/HST credit and the Canada child benefit flowing, since the CRA says late filing can interrupt them.
How can I file for free?
Some certified software has free versions, and the CRA's volunteer clinics help people with modest income and a simple return.
How long does a refund take?
The CRA page on tax preparers says the notice of assessment and any refund are usually processed within two weeks.
Can I fix a return after I file it?
Yes. The CRA lists ReFILE for amended returns in certified software. Check its page for the years it covers.
- How to file your tax return in Canada: steps and dates
What to gather, when your return is due and how to file in Canada, from the first slip to the notice of assessment that closes the year