Missed the April 30 2026 Tax Deadline? Penalties, Interest & How to File Late (CRA)

The April 30, 2026 filing deadline for the 2025 tax year has just passed. If your T1 is not yet in, you are officially late — but the worst thing you can do is nothing. Penalties compound by the month, interest compounds daily, and certain benefit payments stop flowing the longer you delay. Here is exactly what the CRA will charge you, what still needs to happen, and how to limit the damage.

How Much the CRA Will Charge You

The CRA imposes two separate costs on late filers: a late-filing penalty on the balance owing, and arrears interest on every unpaid dollar. They stack.

Late-filing penalty (first offence)

If you owe tax and file after April 30:

5% of the balance owing on the day you file, plus 1% of the balance for each full month you are late, up to a maximum of 12 months.

That maxes out at 17% of the balance owing — charged in addition to the tax itself.

Late-filing penalty (repeat offender)

If the CRA demanded a return from you under subsection 150(2) in any of the three previous years and assessed a late-filing penalty for one of those years, the rate doubles:

10% of the balance owing, plus 2% per full month late, up to a maximum of 20 months.

That maxes out at 50% of the balance owing. Chronic late filers can lose half of any unpaid balance to penalties alone before interest is even counted.

Arrears interest

On top of the penalty, the CRA charges compound daily interest on any unpaid balance, starting May 1, 2026. The prescribed rate is set quarterly. For 2026 it sits around 9% annually on overdue individual balances — roughly 0.025% per day, compounded. Interest also applies to unpaid penalties.

The math, side by side

Assume you owe $5,000 on your 2025 return and file five months late, in late September 2026.

Charge	Rate	Amount
Initial late-filing penalty	5% of $5,000	$250
Monthly penalty (5 full months)	1% × 5 × $5,000	$250
Arrears interest (~9% for ~5 months)	~3.75% of $5,000	~$188
Total cost of being 5 months late		~$688

If you are a repeat offender at the same 5-month delay, the penalty alone is $750 (10% + 2% × 5), plus interest — about $938 on a $5,000 balance.

File Even If You Cannot Pay

The single biggest mistake Canadians make after missing April 30 is not filing because they cannot afford the balance. That is the most expensive option.

Not filing incurs both the 5% + 1%/month penalty and 9% interest.
Filing on time without paying incurs only the 9% interest — no late-filing penalty.
Filing late after paying what you can still stops the 1%-per-month penalty from compounding.

If cash is the problem, file now, pay what you can today, then request a payment arrangement through CRA My Account or by calling 1-888-863-8657. A payment plan does not stop interest, but it stops the monthly penalty clock and keeps you out of collections.

What If You Are Owed a Refund?

Good news: if the CRA owes you money, there is no late-filing penalty — the penalty is a percentage of the balance owing, and zero multiplied by any rate is still zero.

But filing late still costs you. Consequences for refund filers:

GST/HST credit payments (quarterly) stop until your return is assessed. Missing the April 30 deadline can delay your July 2026 payment.
Canada Child Benefit (CCB) eligibility is recalculated each July based on the prior year’s return. A late 2025 filing can pause CCB deposits starting July 2026.
Canada Carbon Rebate (CCR), Climate Action Incentive Payment (CAIP) successor, and provincial credits piggy-back on your T1. No return = no payment.
RRSP deduction limit for 2026 is calculated from 2025 earned income. Without a filed return, the CRA cannot issue a Notice of Assessment showing your new room.
Refund interest: the CRA only pays you refund interest starting 30 days after the later of May 31, 2026 or the day you actually filed — filing late delays when interest starts accruing in your favour.

Bottom line for refund filers: no penalty, but expect benefit payment disruption and a delayed RRSP/NOA cycle.

Self-Employed Filers: June 15 Is Your Deadline, But Payment Was Still April 30

If you or your spouse carried on a business in 2025, your filing deadline is June 15, 2026. But the payment deadline was still April 30, 2026. Interest has been accruing on any balance owing since May 1, even though you are not yet late to file.

If you were self-employed and do not file by June 15, the standard 5% + 1%/month late-filing penalty kicks in on that date.

Taxpayer Relief: When the CRA Can Waive Penalties

Under subsection 220(3.1) of the Income Tax Act, the CRA can cancel or waive penalties and interest in certain circumstances:

Extraordinary circumstances beyond your control (serious illness, accident, death in the family, natural disaster)
Actions of the CRA (delays, errors in published information, processing problems)
Inability to pay or financial hardship

You apply with Form RC4288, Request for Taxpayer Relief. The CRA considers only the most recent 10 years. Relief is discretionary — you must document the circumstance and how it prevented you from meeting the deadline.

Taxpayer relief is not a licence to file late on purpose. It is a genuine safety valve for legitimate hardship, and the CRA scrutinises each request.

Step-by-Step: What to Do This Week

Estimate what you owe using a calculator to know the damage: Canadian Income Tax Calculator.
Model your late-filing cost with the CRA Late-Filing Penalty Calculator so you know exactly what a week or a month more will cost.
File via NETFILE using certified software — see our NETFILE vs Paper Filing guide. Paper filing adds 6-8 weeks to processing and extends your penalty exposure.
Pay what you can immediately via online banking to the CRA, CRA My Account, or the CRA My Payment service.
Set up a payment arrangement for the remainder if needed — call 1-888-863-8657.
If circumstances genuinely warranted the delay, file Form RC4288 along with supporting documentation.

FAQ

How late is “late” — is there a grace period?

There is no grace period. May 1 is late. The 5% initial penalty applies the moment the filing deadline passes, and the 1% monthly charge applies at each full-month anniversary.

Does the CRA send a warning before charging the penalty?

No. The penalty is assessed automatically when your late return is processed. A Notice of Assessment showing the penalty is usually your first notification.

What if I filed on time but paid late?

You avoid the 5% + 1% late-filing penalty entirely. You still owe arrears interest at ~9% on the unpaid balance from May 1 onward. This is always a better outcome than filing late.

Can I file a return for a previous year I missed?

Yes. You can file up to 10 years of back returns. Refunds are only paid for the most recent 10 tax years. Balances owing remain collectable indefinitely, with compounding interest.

Will the CRA prosecute me for filing late?

Late filing alone is not a criminal offence. But persistent refusal to file after the CRA issues a demand can lead to prosecution under section 238 of the Income Tax Act. Fines range from $1,000 to $25,000, with possible jail time. Simply file.