Haven't filed your taxes in years? Here's what the CRA can actually do to you — and how to fix it fast

While this Reddit user may sound like an extreme outlier — a rare case of unintentional tax evasion — in living rooms across the country, the story is surprisingly common. What starts as one missed deadline due to a lost T4 or a hectic year spirals into a decade-long ‘can of worms’ that feels too terrifying to open.

But here is the cold, hard reality: the Canada Revenue Agency (CRA) has a very long memory, and while it can be patient, it is never forgetful. Ignoring the problem doesn't shrink the debt; it just fuels the interest.

Whether you are two years behind or facing 15 years of unfiled tax returns, there is a way to correct this mistake. To help, here are the signs the CRA is losing its patience — and the step-by-step roadmap to fixing the problem without losing your mind.

• Ready to stop worrying and start filing? Whether you're catching up on one tax return or 15 years of missed filing, the right tools make the job much easier to manage. Compare the best tax return software in Canada for 2026 to find the fastest, most affordable way to get back in the CRA's good books.

What the CRA can — and will — do

The CRA's Non-Filer Program (NFP) is specifically designed to track down people who haven't filed. The agency uses data from employers, financial institutions and government programs — the same CERB and employment insurance (EI) payments that prove you're in the system — to identify who owes taxes and hasn't reported them (2).

If the CRA determines you owe money and you haven't filed, it can issue what's known as a notional or arbitrary assessment — essentially, the CRA's best estimate of what you owe, calculated without any of the deductions or credits you'd normally claim (3). That almost always means a higher tax bill than if you'd filed your back taxes yourself.

And the penalties escalate fast.

Miss the April 30 deadline and owe taxes? The CRA immediately adds a 5% late-filing penalty on your unpaid balance, plus 1% for each additional month you're late, up to 12 months. That's a potential penalty of up to 17% in the first year alone (4).

If you've been penalized in any of the previous three years, those rates double: 10% upfront and 2% per month for up to 20 months — a maximum additional penalty of 50% (5).

On top of that, compound daily interest begins accumulating on everything you owe, including the penalties themselves.

The CRA also has collection powers that go well beyond sending letters. Even without a court order, the CRA can garnish your wages, freeze your bank accounts and place liens on your property. Continued refusal to file can lead to criminal prosecution under the Income Tax Act. Convictions can result in fines ranging from $1,000 to $25,000 or up to one year in prison; in more serious cases of deliberate evasion, fines between 50% and 200% of the amount evaded and up to two years behind bars.

For Reddit user r/morosemuskrat the critical piece of information was the admission that they'd received EI and CERB. Those payments are recorded with the CRA. That means r/morosemuskrat is in the system. It also means the clock has been running — and the CRA is coming.

How to catch up on your taxes

The good news is that being behind on your taxes doesn't mean you're out of options. Here's what to do.

Gather your tax slips

Canadian employees receive T4 slips from employers, T4A slips for other income such as pensions or self-employment, and T5 slips for investment income.

If you don't have these tax slips, the CRA usually stores copies. You can access them through My Account on Canada.ca, or by calling the CRA directly at 1-800-959-8281 to request your income history.

If you can't access the CRA’s My Account — the Reddit user couldn't, because logging in requires confirming a line from a return they'd never filed — call the CRA directly. Agents can manually verify your identity and help you access your file.

File the oldest tax return first

Tax professionals consistently recommend starting with your oldest unfiled return and working forward. This matters because carry-forward amounts — things like Registered Retirement Savings Plan (RRSP) contribution room, capital losses and tuition credits — build year over year . Filing out of order means you may miss deductions you're legitimately entitled to — and increase the tax you owe and the penalty you pay.

Consider the Voluntary Disclosures Program

If you owe taxes for years you haven't filed, the CRA's Voluntary Disclosures Program (VDP) may be your most valuable tool. Updated significantly on October 1, 2025, the VDP allows taxpayers to come forward and correct past errors or omissions before the CRA initiates enforcement action (6).

Under the updated program, unprompted applications — those filed before the CRA has contacted you about a specific compliance issue — are eligible for 100% relief from penalties and 75% relief from applicable interest. Even if you've already received a general education letter from the CRA, you may still qualify. Only taxpayers already under active audit or investigation are ineligible (7).

The VDP generally requires the most recent six tax years to be filed as part of a complete disclosure. Partial submissions risk rejection.

File your tax returns even if you can't pay

This is critical: Filing and paying are two separate things, from the CRA’s perspective.