CRA Penalties and Interest: The Real Cost of Filing or Paying Late (2026)

The short answer

Two separate charges can stack when your taxes are late, and it helps to keep them apart in your head:

• The late-filing penalty — a percentage of your balance owing, charged only if you both owe money and file after the deadline.
• Arrears interest — charged on the unpaid balance from the day after the payment deadline, whether or not you filed on time.

The good news hiding in that distinction: if you can’t pay, filing on time still wipes out the bigger of the two charges. Let’s put real numbers on it.

The late-filing penalty

If you have a balance owing and file after the deadline, the penalty is:

• 5% of the balance owing, plus
• 1% of the balance for each full month your return is late, up to 12 months.

That maxes out at 5% + 12% = 17%. If you owe nothing, there’s no late-filing penalty at all — though you should still file (more on why below).

The repeated late-filing penalty is much harsher. If the CRA charged you a late-filing penalty in 2022, 2023, or 2024 and sent you a demand to file, the rate becomes 10% plus 2% per month, up to 20 months — a maximum of 50% of the balance. Letting a second late year land on top of a first is one of the most expensive mistakes in personal tax.

Arrears interest

Separately, the CRA charges interest on any unpaid balance, starting the day after the payment due date — May 1 for most individuals — compounded daily, at the prescribed rate. For the third quarter of 2026 (July 1 to September 30) that rate is 7%. The prescribed rate is reset every calendar quarter, so a balance you carry for a long time can be charged at different rates as the quarters change. Interest also accrues on the penalty itself, not just the tax.

A worked example (estimate, not advice)

Say you owe $5,000 and file 3 months late, with the balance unpaid for about 90 days, at the 2026 Q3 rate of 7%:

Charge	Amount
Late-filing penalty (5% + 1%×3 = 8% of $5,000)	$400.00
Arrears interest (90 days, daily-compounded at 7%)	$87.04
Total extra you’d owe	$487.04

Now the key insight: of that $487, $400 is penalty and only $87 is interest. If you had filed on time and simply paid 90 days late, you’d owe just the $87.04 of interest — no penalty. That’s the whole argument for filing on time even when the money isn’t there yet. Our free late-filing penalty & interest calculator lets you plug in your own balance, months, and days.

Can’t pay? File anyway

This is the single most valuable move if cash is tight: file on time, pay when you can. Filing on time removes the late-filing penalty entirely. You’ll still owe arrears interest on the unpaid balance, but that’s a fraction of the combined cost — and once the return is in, you can arrange a payment plan with the CRA for the balance. Silence is the expensive option; a filed return with a plan is the cheap one.

Filing late quietly costs you benefits, too

Even in a year where you owe nothing, not filing can cost real money. Benefits like the GST/HST credit, the Canada Child Benefit, and provincial credits are recalculated from your filed return each year. Miss the filing and those payments can pause — a hidden penalty that never shows up as a “penalty” line. File to keep the money flowing.

If you’re years behind: the calm way out

Being behind feels worse than it is, and there’s a designed path for it. The CRA’s Voluntary Disclosures Program lets you come forward before the CRA contacts you; an accepted, unprompted application can waive the late-filing penalties and most of the interest, and protect you from prosecution. The sequence that works: gather what you can, estimate the likely balance so there are no surprises, and file the oldest years first. Our shame-free catch-up guide walks the whole thing, step by step.

Making sure it never happens again

The reason a balance owing turns into a penalty is almost always the same: the money to pay it was never set aside. Size the right monthly amount with the tax set-aside calculator, check whether you owe quarterly instalments, and get the full picture from the guide to self-employed taxes in Canada.

VRITTI is a Canadian money app that keeps a set-aside jar growing all year and flags every CRA deadline ahead of time — so a late-filing penalty becomes something that happens to other people. It’s coming soon for Canadian freelancers and sole proprietors; if a deadline that never sneaks up sounds good, you can join the waitlist — no pressure, no download yet.

This article explains CRA rules in plain language and offers estimates to frame a decision — it is not tax advice for your specific situation. Rates and rules were verified against the Canada Revenue Agency pages below on 31 July 2026. The prescribed interest rate changes quarterly.

Sources

• CRA — Late-filing penalty (personal income tax) — the 5% + 1%/month penalty (max 12 months) and the 10% + 2%/month repeat penalty (max 20 months).
• CRA — Prescribed interest rates, 2026 third quarter — the 7% rate on overdue individual income tax for July 1 to September 30, 2026, compounded daily.
• CRA — Interest and penalties for individuals — how arrears interest starts the day after the payment due date and compounds daily.
• CRA — Voluntary Disclosures Program — how coming forward before the CRA contacts you can waive penalties and most interest.