Self-Employed Tax Deadline in Canada: You File by June 15, but the Money Was Due April 30

The answer you came for

Yes — as a self-employed Canadian you have until June 15 to file your return. But if you owe anything, the CRA started charging interest on it May 1, because the money itself was due April 30.

That is the whole trap in one sentence. June 15 is a filing deadline. It was never a payment deadline. The two dates got separated decades ago, and almost every guide, accountant, and government page mentions it — quietly, in the middle of a paragraph, after you have already stopped reading.

If you are reading this because you just found out — after planning your cash flow around June — you are not careless. The rule is genuinely counterintuitive: a deadline that splits in two, where the half nobody emphasizes is the half that costs money. You have plenty of company, and the damage is almost certainly smaller than the knot in your stomach is telling you. We will put a real dollar figure on it below.

And if you are reading this in March or early April: good. You have time to make this whole article irrelevant.

Why the rule exists (and why nobody warns you clearly)

Self-employed returns are harder to assemble than a salaried T4 return — invoices, expenses, the T2125, maybe GST/HST. So the CRA gives you and your spouse or common-law partner until June 15 to get the paperwork in.

But interest law doesn't care about paperwork. Everyone's balance owing — employee or self-employed — is due April 30. The June extension applies only to the form, not the funds.

Why does nobody lead with this? The CRA states it accurately but procedurally, on a page about "due dates," where the payment line and the filing line sit in separate rows and the consequence — daily-compounding interest — lives on a different page entirely. Tax-software content tends to celebrate "self-employed? You get until June 15" because it is the friendlier half of the truth. The unfriendly half is the one that shows up on your statement of account.

What it actually costs: the honest math

Two things can charge you money here, and they are very different sizes. Knowing which is which is most of the calm.

1. Arrears interest (the small one). From May 1 onward, any unpaid balance accrues interest, compounded daily, at the CRA's prescribed rate for overdue tax — 7% for April 1 through June 30, 2026. The rate is set quarterly: the base prescribed rate plus four percentage points.

Worked example, real numbers: you owe $5,000 for 2025 and pay it on June 15, 2026 instead of April 30. That is 46 days of interest (May 1 through June 15) at 7% compounded daily:

$5,000 × ((1 + 0.07/365)⁴⁶ − 1) ≈ $44

Forty-four dollars. Not nothing — but not the catastrophe the phrase "the CRA is charging me interest" conjures at 11 p.m. On a $2,000 balance it is about $18. On $10,000, about $89. The interest scales with the balance and the delay, nothing more. There is no late-payment penalty stacked on top for individuals — just the interest.

2. The late-filing penalty (the big one — but only if you also miss June 15). If you file after June 15 and have a balance owing, the penalty is 5% of the balance, plus 1% for each full month you are late. On that same $5,000 balance, filing even one day past June 15 costs $250 immediately — more than five times the interest from the entire May–June delay.

So the priority order, if you can only do one thing, is unambiguous: file by June 15 no matter what. Filing late with a balance owing is expensive. Paying late is merely a metered fee. Don't let "I can't pay it all" stop you from filing — those are separate problems, and only one of them carries a penalty.

The dates that matter

Date	What it is	What happens if you miss it
April 30, 2026	Your 2025 balance owing is due — everyone, including self-employed	Interest starts May 1: 7% (Q2 2026), compounded daily
June 15, 2026	Filing deadline for self-employed individuals and their spouses/common-law partners	Late-filing penalty: 5% of any balance owing + 1% per full month late
Mar 15 / Jun 15 / Sep 15 / Dec 15	Quarterly instalment dates, once your net tax owing tops $3,000 ($1,800 in Quebec) this year and in one of the two prior years	Instalment interest, same daily-compounded prescribed rate

When a deadline lands on a weekend or public holiday, the CRA treats your payment or return as on time if it arrives the next business day — but in 2026, both spring dates fall on ordinary weekdays, so there is no grace to lean on.

The move: pay by April 30, file by June 15

The play is simple once you see the two deadlines as separate jobs:

1. By April 30: pay your best estimate, even though your return isn't finished.
2. By June 15: file the actual return.
3. The difference settles itself — overpaid amounts come back when your return is assessed; underpaid amounts accrue interest only on the shortfall, only from May 1.

Slightly overpaying beats slightly underpaying. An overpayment is your money parked with the CRA for a few weeks; an underpayment is a daily-compounding meter running on the gap.

How to estimate a "good enough" April payment

You don't need a finished return — you need a defensible number:

• Stable income year? Last year's total tax bill is a fine first estimate. Pay that.
• Income grew? Take last year's bill and scale it up by roughly the same percentage your net income grew, then round up.
• First year, or big swings? Total up your 2025 net self-employment income (revenue minus expenses — even roughly), and run it through a current-year tax estimator that knows your province and adds CPP contributions on top. The CPP part matters: self-employed people pay both the employee and employer halves, which is why a generic "income tax calculator" aimed at employees will lowball you. (Here is the full set-aside math.)

Then pay it, dated on or before April 30, through CRA My Payment, online banking (payee: "CRA (revenue) — 2025 tax return"), or a pre-authorized debit in My Account.

The calendar that prevents this entirely next year

The April 30 scramble is downstream of one habit gap: treating taxes as an annual event instead of a slice of every payment. The version of you who never reads an article like this again runs the year like this:

• As you earn: skim a set-aside slice off every client payment the day it lands, into an account you don't touch. Your real percentage depends on income, province, and CPP — not a folk-wisdom flat number. (This is the one job VRITTI's Tax Jar exists for: it computes your actual rate from progressive federal + provincial brackets plus both CPP halves, and skims automatically as income arrives — so April 30 is a transfer, not a discovery.)
• April 30: pay the balance from the set-aside. Boring, as designed.
• June 15: file.
• After your first year over the $3,000 net-tax-owing line: expect quarterly instalments — Mar 15, Jun 15, Sep 15, Dec 15 — and fund them from the same set-aside flow.

The whole system is one decision (the skim) made once, instead of one terrifying number found annually.

Reading this in May or June, with April 30 behind you?

No scolding — here is exactly what to do, today:

1. Pay what you can, now. Interest compounds daily, so every day a partial payment is in earlier is interest that never accrues. You do not need to have filed to make a payment toward your 2025 balance.
2. Still file by June 15. The 5%-plus-monthly penalty only exists for late filing with a balance owing. Filing on time caps your damage at the small number, not the big one.
3. Don't wait for a "bill." The interest meter is already running; the CRA will assess it when you file. Paying before they ask simply stops the meter sooner.
4. If you genuinely cannot pay in full, pay what you can and arrange the rest — the CRA accepts payment arrangements, and interest on a shrinking balance is smaller every week. The expensive move is freezing.

One true thing to leave with: the June 15 deadline is real, but it was only ever half the deal. The money's date is April 30, the meter is 7% and counted in days, and the worst outcome isn't owing interest — it's letting the surprise stop you from filing. File on time, pay what you can, and set next year up so the only thing due in April is a transfer you saw coming.

This article explains CRA rules in plain language; it is general information, not tax advice for your specific situation. Figures verified against the sources below as of June 10, 2026 — the prescribed rate changes quarterly; check the current rate.

Sources

• CRA — Due dates and payment dates, personal income tax (balance owing due April 30)
• CRA — Filing due dates for the 2025 tax return (June 15 for self-employed)
• CRA — Prescribed interest rates, Q2 2026 (7% on overdue tax)
• Advisor.ca — CRA announces prescribed rate for Q2 2026
• CRA — Interest and penalties for individuals
• CRA — Late-filing penalty
• CRA — Required tax instalments for individuals