Not sure what you owe the CRA? Answer a few questions about your business and the checker lists which returns and slips look overdue, plus the next deadlines: the T2 corporate return or the T1 with Form T2125, GST/HST returns, and T4 and T5 slips.
Fill in the form and press Calculate to see your estimate.
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Rates used: T2 filing deadline: months after year-end: 6 (source); T2 balance due: months after year-end (CCPC that claimed the SBD, with prior-year taxable income within the business limit): 3 (source); GST/HST monthly/quarterly return: months after period end: 1 (source); GST/HST annual return: months after fiscal year-end: 3 (source); Small supplier threshold (taxable supplies, 4 consecutive quarters or 1 quarter): $30,000 (source).
Last updated: October 18, 2026
How the checker works
Tell us how the business is set up: a corporation (T2) or a sole proprietor (T1 with Form T2125), and the corporation’s year-end month.
Enter your filing history: the first tax year-end and the last year an income tax return was filed. Enter 0 if one has never been filed.
Add GST/HST, payroll and dividends: whether you are registered for GST/HST and how often you file, and whether you paid wages (T4) or dividends (T5).
See the result: what looks overdue, what is coming up next, and the dates.
The main CRA filing deadlines
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Filing
Due date
Notes
T2 corporate return
6 months after the tax year-end
Required every year, even with no income or tax owing
T2 balance owing
2 months after year-end (3 months for a CCPC that meets the small business conditions)
Interest starts the day after, even though the return is due later
T1 with T2125 (sole proprietor)
June 15 of the following year
Any balance owing is due April 30
GST/HST, monthly or quarterly
1 month after the end of the period
File a nil return if there was nothing to report
GST/HST, annual
3 months after the fiscal year-end
Sole proprietors with a December 31 year-end file by June 15 and pay by April 30
If a T1 or T2 is late and tax is owing, the CRA charges a late-filing penalty of 5% of the balance plus 1% for each full month late, up to 12 months. If the CRA sent a demand to file and you were also charged a late-filing penalty in any of the three previous years, the penalty doubles to 10% plus 2% a month, up to 20 months. A late GST/HST return with a balance owing costs 1% plus 0.25% a month, up to 12 months.
T-Ledgers is a CPA-led accounting firm practising since 2020, led by Wajahat Ajmal, CPA, FCCA. We have worked with 202 clients, with a combined $60 million in client revenue.
Six months after the end of its tax year. Any balance owing is due earlier: two months after year-end, or three months for a CCPC that meets the small business conditions.
June 15 of the following year, but any balance owing is due April 30, so interest starts after April 30. Business income is reported on Form T2125 with your T1.
By the last day of February after the calendar year, or the next business day if it falls on a weekend. No T5 is needed for amounts under $50 paid to one recipient in the year.
A corporation must file a T2 every year, even with no income or tax owing. A GST/HST registrant must file a return for every reporting period, including nil returns.
Talk to a CPA about what you need to file
Book a free 30-minute call. We’ll confirm what’s overdue and the fastest way to get it filed.
Call (866) 254-5368 or email info@tledgers.ca. A 24/7 receptionist answers, so a real person picks up.
