If you or your spouse or common-law partner carried on a business as a sole proprietor in 2024, the Canada Revenue Agency gave you until June 16, 2025 to file your T1 return — a one-day shift from the usual June 15 self-employed filing deadline, because June 15, 2025 fell on a Sunday. That extra six weeks past the general April 30 deadline is genuinely useful for a busy Toronto proprietor closing out books. What trips people up every year is the second half of the rule: the filing deadline moved, but the payment deadline for any balance owing did not — it stayed at April 30, 2025, the same date as everyone else.
Source: Government of Canada — Important dates for individuals.
Two deadlines, not one
This is the single most consequential detail in the self-employed extension, and it is easy to miss because both dates get compressed into "the June deadline" in casual conversation:
| Filing due date | Payment due date | |
|---|---|---|
| Employees / T4 income only | April 30, 2025 | April 30, 2025 |
| Self-employed (sole proprietor or their spouse/partner) | June 16, 2025 | April 30, 2025 |
A Toronto proprietor who files on June 10 but has not yet paid the balance owing has been accruing CRA arrears interest since May 1 — filing on time under the extended deadline does not stop interest from running on an unpaid balance. For a business with a genuinely tight April cash position, the practical move is to estimate the balance owing as early as possible and pay it (or as much of it as can be covered) by April 30, even if the actual return is not finalized until closer to June.
Who the extension actually covers
The June deadline applies specifically to individuals who carried on a business in the calendar year, or whose spouse or common-law partner did — it is a household-level rule, not strictly an individual one. This covers:
- Unincorporated sole proprietors and freelancers filing business income on their personal return.
- Partners in a general partnership reporting their share of partnership income personally.
- A spouse with no self-employment income of their own, but who is married to or in a common-law relationship with someone who does — the whole household return gets the later filing deadline.
It does not extend the filing deadline for a corporation's T2 return (a separate filing on its own six-month clock — see our companion piece on the June 30 corporate deadline), and it does not change anything about HST/GST remittance schedules, which run on their own reporting-period calendar set separately from the personal income tax filing dates.
Why this matters differently for a Toronto proprietor than for an incorporated business
An incorporated Toronto business owner draws salary or dividends from the corporation and files a personal T1 like any employee — the corporation's own tax year and the owner's personal T1 are two separate filings on two separate clocks. A sole proprietor has no such separation: the business is the personal return. That means a proprietor's April-to-June stretch is simultaneously personal tax season and year-end bookkeeping for the business, with no corporate buffer between the two. It is also why proprietors are more likely to be caught by the payment-vs-filing gap described above — without a corporation's own bank account and books to draw the estimate from, arriving at an accurate balance-owing estimate by April 30 takes more deliberate work.
What Toronto-area proprietors should do
- Estimate the balance owing before April 30, even if the full return isn't ready. A rough estimate paid on time avoids arrears interest accruing through May and June while the final numbers get sorted out.
- Don't confuse the self-employed filing extension with any change to HST filing deadlines. HST reporting periods and remittance due dates are set independently and don't move with the personal filing calendar.
- If you're incorporated, don't assume the June extension applies to your corporate return. The T2 filing clock runs on your corporation's own fiscal year-end, not the personal tax calendar — see our note on the six-month T2 filing rule for details.
- Use the extra weeks for what they're actually for: getting the books right, not for delaying payment. The extension exists because reconciling a full year of business income and expenses genuinely takes longer than a T4 slip; it isn't a payment holiday.
- If your proprietorship has grown to the point where incorporation might reduce your total tax bill, the self-employed filing season — when you have a full year of numbers in front of you — is a natural moment to run that comparison; see our Ontario incorporation guide.
The bigger picture
The self-employed filing extension is a genuine accommodation for how much longer it takes to close out a full year of unincorporated business activity compared with reconciling a T4 slip. Its value gets undermined every year by proprietors who read "extension" as covering the whole obligation, then discover in July that interest has been accruing since May 1 on an unpaid balance. Separating the two dates in your own planning — pay an estimate by April 30, file the accurate return by mid-June — is the entire fix.
If you're a Toronto-area sole proprietor weighing incorporation, catching up on bookkeeping ahead of the June filing deadline, or want your HST filing rhythm reviewed alongside your personal return, RN Canada works with Ontario business owners remotely from our Edmonton and Vancouver offices, including through our tax return preparation and bookkeeping and payroll services.