File by June 15, But the Interest Clock Started May 1: Sizing What You Owe in Canada
Self-employed Canadians have until June 15 to file, but any balance owing was due April 30, so CRA interest runs from May 1 on whatever is unpaid. You cannot stop interest by filing; you stop it by paying. The practical move is to size what you owe now from your categorized income and expenses, pay that down, and then finish filing. This is general guidance, not tax advice.
There is a quiet trap in the Canadian self-employed deadlines, and a lot of careful people fall into it without doing anything wrong. You see June 15 on the calendar, you know that is your deadline, and you relax. The part that does not get said loudly enough: June 15 is the date to file. It is not the date to pay. The payment was due back on April 30, and if you have a balance owing, interest has been running since May 1.
This is not a reason to panic, and the goal here is not to scare you. It is to make sure you size what you owe correctly, so a small, fixable number does not quietly grow while you assume you are clear. Let us untangle the two dates and then get you to a real estimate.
Two deadlines, not one
Here is the distinction in plain terms, straight from CRA's own dates for individuals.
- The filing deadline for self-employed people is June 15. If you or your spouse or common-law partner carried on a business, you get until June 15 to actually send in the return, including your T2125.
- The payment deadline is April 30. Any balance you owe for the year was due April 30, the same date employees with no business income face.
- Interest accrues from May 1. Because the balance was due April 30, CRA starts charging interest on any unpaid amount beginning May 1, even though your filing is not late.
So the two things people conflate, filing and paying, are governed by different dates. You can be perfectly on time to file on June 15 and still owe interest, because the money was due six weeks earlier.
| What | Deadline | What happens if you miss it |
|---|---|---|
| Pay your balance owing | April 30 | Interest accrues from May 1 on the unpaid amount |
| File your return (T2125) | June 15 | A late-filing penalty can apply only if you also owe and file after June 15 |
General guidance, not tax advice. Dates and rules change and depend on your situation. Confirm with CRA or your accountant.
The calm read on this
Notice what this actually means, because it is less alarming than it first sounds.
Filing on June 15 does not, by itself, trigger a penalty. The late-filing penalty is tied to filing after your deadline while owing a balance. If your deadline is June 15 and you file by June 15, you are not late, full stop.
What is running is interest, and only on a balance you have not yet paid. If you owe nothing, there is nothing to accrue. If you owe a little, the interest on a little, for a few weeks, is a small number. The thing that turns a small number into a real one is time and not knowing. So the fix is not to rush the paperwork in a fluster. The fix is to figure out, as closely as you can, what you owe, and pay that down. You can finish the careful version of the return after.
A useful way to hold it: you stop interest by paying, not by filing. Those are separate levers. Pull the paying lever as soon as you have a credible estimate.
How to size what you owe from your receipts
To estimate a balance, you need two halves: your business income for the year, and your deductible business expenses. The expenses are usually the part sitting in a pile, and they are also the part that most reduces what you owe, so getting them right is worth doing properly even under time pressure.
The approach that holds up is the same one that makes the T2125 itself easy: read every receipt line by line, tag each line to its CRA expense line, and pull a total by category. That gives you a defensible expense figure to subtract from income, which lands you on a far more accurate "what do I owe" number than a guess.
This is what scan-ai is built to do. Snap or forward your receipts, and it reads each line, not just the merchant and total, and maps it to the right T2125 line. One office-supply run becomes a printer, paper, and pens on their separate lines, with the personal coffee flagged out. When you want a number, you ask for the total by category and read it straight off. The point for today is speed with accuracy: a complete expense total means your owing estimate is not inflated by deductions you forgot to count.
For the line-by-line filing mechanics once you have those totals, see filing your T2125 by June 15 with line-item totals. For the wider list of what you can legitimately deduct, see Canadian self-employed tax deductions. And to sanity-check which of your purchases map to which line, in Canada mode, try the deduction finder.
A short sequence for the next few days
If June 15 is close, here is the order that keeps interest from growing while you finish up.
- Estimate income. Total what the business brought in for the year. This is usually the easy half.
- Total deductible expenses, line by line. Read each receipt, tag every line to its T2125 line, pull the category totals. This is the half that shrinks your bill, so do it before you guess.
- Subtract to get a working net. Income minus deductible expenses is your starting point for taxable business income.
- Pay down a credible estimate now. You do not need the return finalized to make a payment toward the balance. Paying stops interest from accruing on that amount.
- File by June 15. With your categorized totals in hand, the actual T2125 entry is copying one number per line.
- Reconcile after, if needed. If your final number differs, you settle the difference; the bulk of the interest exposure is already handled.
The reason to total expenses before paying is simple: every legitimate deduction you capture lowers the balance, which lowers the interest. Skipping them to "save time" can cost you more than the time was worth. If this June felt like a scramble, the fix is to capture as you go next year; we walk through that in how to track T2125 expenses.
Frequently asked questions
Is the self-employed tax deadline April 30 or June 15 in Canada? Both, for different things. The return (including the T2125) is due June 15 for self-employed individuals, but any balance owing was due April 30. They are separate deadlines. General guidance, not tax advice; confirm with CRA.
Does CRA charge interest if I file by June 15? CRA charges interest on a balance owing starting May 1, because the payment was due April 30. Filing on time (by June 15) avoids the late-filing penalty, but it does not stop interest on an unpaid balance. You stop interest by paying.
Can I file late but pay on time in Canada? The better framing is the reverse: you can, and often should, pay before you finish filing. Paying down a credible estimate of your balance stops interest from accruing on that amount, and you can finalize the return by June 15.
How do I estimate what I owe as a self-employed person? Total your business income, then subtract your deductible business expenses (read line by line and tagged to T2125 lines), to get a working net figure. A complete expense total keeps your estimate from being inflated by deductions you forgot. Confirm the final figure with your accountant.
What is the late-filing penalty if I miss June 15? A late-filing penalty can apply if you owe a balance and file after your deadline. If you file by June 15 and that is your deadline, you are not late. This is general guidance; CRA's published rules and your specific facts govern.
Does paying CRA stop the interest? Interest stops accruing on amounts you have paid. That is why sizing and paying down your balance, even before the return is fully finished, is the lever that actually reduces interest, not rushing the paperwork.
Your next step
The two dates are easy to mix up, and mixing them up is what turns a small interest charge into a bigger one. Filing is open to June 15. The payment was due April 30, and interest runs from May 1 on anything unpaid. So size what you owe, pay down a credible estimate, then finish filing calmly.
Check your categories in Canada mode with the deduction finder, then start free at scan-ai.ca: 20 receipt scans and 5 AI chats, no credit card. Read your expenses line by line so your owing estimate is complete, not a guess.
This article is general information, not tax advice. Tax rules change and depend on your specific situation. Confirm anything with real stakes with a qualified accountant or CRA.