Late corporate tax filing penalties: what a late T2 really costs
Filing a T2 late costs 5% of unpaid tax plus 1% per month, and Revenu Québec adds its own CO-17 penalty. What late filing really costs — and how to catch up.
File a T2 corporate tax return late and the CRA charges 5% of the tax unpaid at the filing deadline, plus 1% of that amount for every complete month you are late, up to 12 months — a maximum of 17%. If the CRA has already demanded the return and the corporation was penalized for late filing in any of the three previous years, the penalty doubles to 10% plus 2% per month for up to 20 months — a maximum of 50%. Daily-compounded interest runs on top, and corporations with an establishment in Québec face a parallel penalty on the CO-17. Here is what being late actually costs, why a nil balance does not make you safe, and how to fix it.
How the federal late-filing penalty works
The penalty base is the tax still unpaid on the filing deadline — six months after your fiscal year-end (every filing and payment date lives in our corporate tax deadlines guide). The rate is 5% of that unpaid tax from the first day, plus 1% per complete month, capped at 12 months.
A corporation that owes $20,000 and files six complete months late pays $1,000 plus $1,200 — a $2,200 federal penalty before a dollar of interest, and before Revenu Québec is counted.
Two practical points follow from how the penalty is calculated:
- Paying caps the damage. The penalty applies only to tax unpaid at the deadline. If your books are not ready but you can estimate the bill, paying that estimate now shrinks the base the penalty is charged on.
- A nil balance means a nil penalty — but not zero consequences. More on that below.
The repeated-failure penalty: up to 50%
The escalated penalty applies when two conditions are met: the CRA issued a formal demand to file the return, and a late-filing penalty was assessed against the corporation for any of the three previous tax years. It then becomes 10% of the unpaid tax plus 2% per complete month, up to 20 months. Chronic late filers are exactly who this rule targets — which is why catching up on every outstanding year, not just the loudest one, matters.
Interest compounds daily — and none of it is deductible
Arrears interest starts on the balance-due day — two or three months after year-end, well before the filing deadline — at the CRA's prescribed rate for overdue taxes, compounded daily. At the time of writing that rate is 7%, and it resets every quarter. Interest also accrues on unpaid penalties.
Neither the penalties nor the arrears interest are deductible against corporate income. Every dollar of penalty is a full after-tax dollar.
Québec: the CO-17 carries its own penalties
Corporations with an establishment in Québec also file a CO-17 return with Revenu Québec, and the late-filing penalty mirrors the federal rule: 5% of the unpaid balance plus 1% per complete month, up to 12 months. Revenu Québec charges its own daily-compounded interest at a rate it also resets quarterly, and it can add further penalties when a corporation ignores a formal demand to file. A Québec corporation that files late is usually paying two penalty stacks at once.
No tax owing? Filing late still costs you
Because the penalty is a percentage of unpaid tax, a corporation with nothing owing pays no late-filing penalty. Filing late is still a bad deal:
- The reassessment clock never starts. The CRA's normal reassessment period — three years for a CCPC, four for other corporations — runs from the initial notice of assessment. No return, no assessment, no clock: the year stays open indefinitely.
- Refunds expire. A corporation generally forfeits a refund when the return is filed more than three years after year-end — including the dividend refund a CCPC would otherwise recover when it pays taxable dividends.
- SR&ED dies at 18 months. An SR&ED claim must be filed no later than 12 months after the T2 filing due date. That deadline is statutory — the CRA cannot extend it, even by a day.
- The CRA can file for you. When a demand to file goes unanswered, the CRA can issue an arbitrary assessment based on its own estimate — rarely in your favour — and start collecting on it.
The fix: file now, then ask for relief
The order of operations matters. First, file — every outstanding year, T2 and CO-17, oldest first. Penalties stop growing after 12 (or 20) months; interest never does. Second, pay what you can or set up a payment arrangement, so interest runs on a shrinking balance. Third, ask for relief where the facts support it.
The CRA's taxpayer relief provisions allow it to cancel or waive penalties and interest going back up to 10 years when the delay was caused by circumstances beyond your control — serious illness, a disaster, a CRA error or delay — or when paying them would cause financial hardship. You apply with Form RC4288 and supporting evidence. Revenu Québec offers the equivalent under section 94.1 of the Tax Administration Act, requested with form MR-94.1 or a letter. Relief is discretionary: a documented, specific request does far better than boilerplate.
When the Voluntary Disclosures Program applies — and when it doesn't
The CRA rewrote its Voluntary Disclosures Program (VDP) effective October 1, 2025. An unprompted application — filed before any CRA communication about the issue — now qualifies for 100% penalty relief and 75% relief of arrears interest. A prompted application, filed after the CRA has signalled the problem, can still receive up to 100% penalty relief but only 25% interest relief. Applications go in on Form RC199, must disclose all known errors, must generally involve information at least one filing period past its due date, and must include payment or a payment arrangement.
The VDP is not for every late filer. If your return is a few months late and the CRA has not contacted you, the simplest path is usually to just file. The program earns its keep when several years are unfiled or income went unreported and the penalty-and-interest stack is large — and it is off the table once an audit or investigation into the issue is underway. Revenu Québec runs its own, separate voluntary disclosure program, so a Québec corporation typically files both applications in parallel.
Behind on your corporate returns? We do this every week
Stamped's CPAs catch up unfiled T2 and CO-17 returns for incorporated businesses across Canada — reconstructing records, filing every outstanding year and preparing relief or disclosure applications when the file supports them. Corporate tax returns start at $1,475, you get an answer within 24 hours, and everything happens online. Start with our late tax filings service.
Frequently asked questions
How much is the penalty for filing a T2 late?
5% of the tax unpaid at the filing deadline, plus 1% per complete month late, up to 12 months — a maximum of 17%. If the CRA demanded the return and the corporation was assessed a late-filing penalty in any of the three previous years, it rises to 10% plus 2% per month for up to 20 months, a maximum of 50%.
Is there a late-filing penalty if my corporation owes no tax?
No — the penalty is a percentage of unpaid tax, so a nil balance means a nil penalty. But filing late still hurts: the reassessment period never starts running, refunds (including the dividend refund) are generally forfeited if you file more than three years after year-end, and SR&ED claims expire 12 months after the filing due date.
Can the CRA cancel late-filing penalties and interest?
Yes, under the taxpayer relief provisions, for up to 10 years back, when the delay was caused by circumstances beyond your control, a CRA error or delay, or financial hardship. Apply with Form RC4288. Revenu Québec offers equivalent relief through form MR-94.1.
Do I need the Voluntary Disclosures Program to file late returns?
Usually not. If the CRA has not contacted you and the return is only months late, simply filing is the cleanest fix. The VDP applies when information is at least one filing period past due and the penalty-and-interest exposure is significant — an unprompted application can eliminate penalties entirely and reduce interest by 75%.
What interest rate does the CRA charge on overdue corporate tax?
The prescribed rate for overdue taxes, compounded daily — 7% at the time of writing (third quarter of 2026). The rate resets every quarter, and Revenu Québec charges its own comparable rate on Québec balances.