9 million Canadians just missed the tax deadline. Here's what to do this week.

If your 2025 tax return is still sitting on your kitchen table, you have plenty of company. A new national study found that 28% of Canadians (roughly 9 million people) had not filed by the time the 30 April 2026 deadline arrived. Ontario was the worst in the country, with 33% of Ontarians still unfiled in the final days.

The deadline has now passed. So what happens next? Less than you might fear, but more than you might expect. Here is exactly what to do.

What missing the deadline actually costs.

The CRA late-filing penalty has two parts:

1. 5% of any balance owing, charged the day after the deadline.
2. 1% of the balance owing for every full month you’re late, capped at 12 months.

If you were charged a late-filing penalty in any of the previous three tax years, the CRA doubles those numbers. That means 10% upfront and 2% per month for up to 20 months.

On top of penalties, the CRA charges compounding daily interest on any unpaid balance at the prescribed rate. Interest also applies to the penalty itself, so the longer a balance sits unpaid, the faster it grows.

If you owe nothing, or if you are getting a refund, the percentage penalty is zero. You can technically file late at no direct cost. But “no penalty” is not the same as “no consequences.”

The benefits and credits you stop receiving.

Most Canadians do not realize how much of their household income depends on having a current tax return on file with the CRA. If you don’t file, the following payments stop, get delayed, or never arrive:

• Canada Child Benefit (CCB), tax-free monthly payments for families with children under 18.
• GST/HST credit, quarterly payments to low and modest-income individuals and families.
• Canada Carbon Rebate (CCR), quarterly payments to households in provinces under federal carbon pricing.
• Ontario Trillium Benefit (OTB), which combines the Ontario Sales Tax Credit, the Ontario Energy and Property Tax Credit, and the Northern Ontario Energy Credit.
• Canada Workers Benefit (CWB), a refundable credit for low-income workers with quarterly advance payments.
• Guaranteed Income Supplement (GIS), a monthly top-up for low-income seniors receiving OAS.

For many Durham Region families, these benefits add up to a significant portion of the monthly household budget. Skip your return, and those payments simply stop showing up. The CRA does not send a warning letter. The deposits just go missing.

Once you file, the CRA needs time to process the return before benefits resume. A return filed in May usually means benefits start flowing again in June or July. Some payment periods get skipped entirely, and those missed payments are not always recovered retroactively if too much time passes.

Why people don’t file (the real reasons).

When non-filers were asked why they hadn’t filed yet, the answers were honest:

Notice what isn’t on that list: confusion about the rules, a belief that filing isn’t required, or any kind of protest. The biggest barrier here is procrastination, usually paired with anxiety about what the return might say.

Here is what matters: the longer you wait, the worse it gets. The penalty clock keeps running. Interest compounds daily. Benefits stay paused.

What to do this week.

If you owe money and haven’t filed yet.

1. File the return now, even if you can’t pay the full balance. Filing stops the 1% per month penalty even if the bill goes unpaid.
2. Pay what you can through CRA My Account, online banking, or your financial institution’s bill payment system.
3. If the balance is too large to handle, call the CRA at 1-888-863-8657 and request a payment arrangement. The CRA will usually accept reasonable monthly payments.

If you don’t owe money and haven’t filed yet.

1. Use Auto-fill my return through CRA My Account. It pulls in T4s, T5s, RRSP slips, and most other slips automatically.
2. NETFILE the return through any CRA-certified software. Refunds with direct deposit usually arrive within eight business days.
3. Sign up for direct deposit if you haven’t already. Paper cheques add weeks.

If you’re missing slips.

You can still file. Log into CRA My Account, pull the slips the CRA already has on record, and use those numbers. If a slip is missing entirely, file with your best estimate based on pay stubs or bank records. The CRA can adjust the return later if better information surfaces.

If you haven’t filed in years.

If you have several years of unfiled returns, that’s a different conversation. The CRA’s Voluntary Disclosures Program (VDP) can give you penalty relief and reduce part of the interest, but only if you come forward before the CRA contacts you first. Once the CRA sends a demand to file, the door to the VDP closes.

To qualify for VDP relief, the disclosure must be:

• Voluntary (no prior CRA contact about those years).
• Complete (all years and all issues disclosed).
• Backed by payment of the tax owing, plus interest.

For someone five years behind on returns, the VDP often turns a five-figure penalty into a much smaller bill. Late-filing penalties are waived and gross-negligence penalties are removed. You still pay the underlying tax.

This is the kind of file where professional tax helppays for itself many times over. A qualified accountant can package the disclosure, calculate each year’s return, and represent you with the CRA so you do not have to make the calls yourself.

Three myths worth correcting.

Filing in Durham Region.

We work with business owners and individuals across Oshawa, Whitby, Ajax, Pickering, Clarington, and Uxbridge. If you missed the deadline, are worried about what your return will say, or have been putting off years of catch-up filing, we can help you sort out exactly where you stand and what your options are.

Book a free 15-minute call and let’s get this off your plate.

This article is for general information only and doesn’t replace professional tax advice. Tax rules change, and your specific situation matters. Always confirm with a qualified CPA before making tax decisions.