If you work for yourself in Canada, the tax calendar has a twist that catches a lot of people: the date you have to file and the date you have to pay are not the same. Miss the distinction and you can be on time with your paperwork while still owing interest.
This is a plain-language overview of the deadlines that matter for sole proprietors, so you can plan around them instead of reacting to them. It is general information, not tax advice — always confirm the current dates and rules with the CRA or a qualified professional.
The 2025 return was due June 15; payment was due April 30
For most individuals, the 2025 personal income tax (T1) filing deadline was April 30, 2026. If you or your spouse or common-law partner carried on a business in 2025, your 2025 return was generally due June 15, 2026.
The June deadline did not apply where the relevant business expenditures were mainly tax-shelter investments; that return was due April 30. The later filing date also did not push back the payment date: any 2025 balance owing was due April 30, 2026, and daily compound interest began May 1, 2026 on any unpaid 2025 balance.
So the practical reading for a self-employed person is:
- April 30, 2026 — any 2025 balance owing was due.
- June 15, 2026 — a qualifying self-employed return was due.
If either obligation remains outstanding, file or pay as soon as possible and ask the CRA or a qualified professional about the steps that apply to your situation.
GST/HST has its own clock
If you are registered for GST/HST, that filing is separate from your income tax return and runs on your reporting period — monthly, quarterly, or annual.
The April 30 payment and June 15 filing exception applied to an annual GST/HST filer who was a sole proprietor, had a December 31 year-end, and had business income for tax purposes that year. If all three conditions were not met, the ordinary annual deadline was generally three months after year-end. Monthly and quarterly filers have deadlines tied to the end of each period.
The details depend on your registration and reporting period, so check your own GST/HST filing dates in CRA My Business Account or with your accountant. GST/HST instalments are separate from income-tax instalments. For recordkeeping, preserve any GST/HST line shown long before a deadline arrives; our guide on GST/HST receipts for freelancers explains what to review.
Instalments: when “once a year” becomes “four times a year”
For 2026, most individuals may have to pay income-tax instalments if net tax owing exceeds $3,000 ($1,800 in Quebec) in 2026 and in either 2025 or 2024. The ordinary due dates are March 15, June 15, September 15, and December 15; the first two have passed as of July 17, while farmers and fishers have a separate rule.
Whether instalments apply to you, and how much, depends on your numbers — this is a good thing to confirm with the CRA or a professional rather than guess. The takeaway for planning: self-employment income often means setting money aside through the year instead of facing one large bill in April.
What happens if a deadline lands on a weekend
When a filing or payment deadline falls on a Saturday, Sunday, or public holiday, the CRA generally considers your return or payment on time if it is received (or postmarked) on the next business day. Do not build your year around that grace, but it is useful to know. Verify the current-year treatment if you are filing close to the wire.
How to stop scrambling: work backward from the dates
The reason tax deadlines feel stressful is rarely the deadline itself — it is reconstructing a year of receipts in the final week. The fix is to make the records continuous, so the deadline is just an export.
A simple system that holds up:
- Scan receipts as they happen, so the image is captured while it is still legible.
- Capture the GST/HST line on every business receipt.
- Log business mileage as you drive — see the CRA mileage deduction guide.
- Review uncategorized items weekly so nothing piles up.
- Export a clean PDF and CSV for your accountant well before the next applicable deadline.
If you want the full year-round version of this, start with how to organize receipts for taxes in Canada.
PKTD is built for this rhythm: on-device OCR reads receipt text, optional AI can suggest fields for your review, business-trip details stay with your mileage records, and CSV/PDF exports are available when a deadline approaches. You can download PKTD on the App Store and start before the next deadline.
The takeaway
For a qualifying Canadian self-employed 2025 return, the split was: the balance was due April 30, 2026, and the return was due June 15, 2026. Confirm whether the self-employed filing exception applied, and treat GST/HST and income-tax instalments as separate schedules.
This article is general information, not tax advice. Deadlines, thresholds, and GST/HST rules depend on your situation and can change — verify current dates with the CRA or a qualified professional. See our disclaimer.