Unfiled T2 Refund Expiry Checker
Some corporations behind on filings are owed money, not chasing it. A refund expires three years after the tax year end and there is no relief for corporations. Find out what is still claimable, what has already gone, and the exact date each year closes.
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Year by Year
| Tax Year End | Refund Value | Refund Expires | Status | SR&ED Deadline |
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What Is Recoverable and What Is Not
| Item | Deadline | Still Claimable | Forfeited |
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The Deadlines That Apply
| Item | Deadline | Relief Available |
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Points That Decide This
What to Do Next
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Disclaimer: Subsection 164(1) permits the Minister to refund an overpayment where the return for the year is filed within three years after the end of the tax year. The extended relief in subsection 152(4.2), which allows a request up to ten years, is available only to individuals and graduated rate estates and does not apply to corporations. A claim for scientific research and experimental development must be filed on Form T661 within eighteen months of the end of the tax year, and that deadline is statutory with no discretion to extend. Non-capital losses may be carried back three years and forward twenty, but must be reported on a filed return before they can be applied. Figures assume the same amounts in each year, which the calculator uses for illustration rather than as a substitute for the actual records. This page is general information, not tax advice.
Corporations Get No Second Chance
Individuals who file late can ask the CRA to issue a refund up to ten years back under the taxpayer relief provisions. Corporations cannot. Subsection 152(4.2) applies to individuals and graduated rate estates only.
For a corporation, three years after the tax year end is the end of it. There is no application, no discretion and no exception. The money simply stops being refundable, and a corporation that was owed $27,000 for a year that closed last month has no route to it at all.
The Clock Runs From the Year End, Not the Filing Deadline
This catches people who assume they have three years from when the return was due. They do not. The three years runs from the end of the tax year itself, so a December year end closes on 31 December three years later.
| Tax Year End | Refund Expires |
|---|---|
| 31 December 2022 | 31 December 2025 |
| 31 December 2023 | 31 December 2026 |
| 31 December 2024 | 31 December 2027 |
| 30 June 2024 | 30 June 2027 |
Every year rolls off separately, so there is always one on the edge. Filing the oldest first is not a preference, it is the only order that makes sense.
SR&ED Is Far Worse
A claim for scientific research and experimental development must be filed on Form T661 within eighteen months of the tax year end. Not three years. Eighteen months.
That deadline is statutory and the CRA has no discretion to extend it. A corporation four years behind has lost every SR&ED claim in those years without exception, and on a company claiming $40,000 a year that is $160,000 gone before you look at anything else. It is the single most expensive consequence of falling behind, and almost nobody knows the deadline is different.
Losses Behave Differently
Non-capital losses do not expire on the same three-year clock. They can be carried back three years and forward twenty. But a loss has to be reported on a filed return before it can be applied to anything.
The practical effect is that a corporation with unfiled loss years is holding a shelter it cannot use. When the good year arrives and the tax bill lands, the losses are still sitting in returns that were never filed, and the carryback window against the profitable year may already be closing.
What Is Usually Sitting There
- Instalments paid in a year that turned out to be less profitable than expected.
- The dividend refund on refundable tax, which requires a return filed within three years.
- Ontario refundable credits, including the innovation and business research credits.
- SR&ED investment tax credits, refundable in full for a CCPC on qualifying expenditures.
- Withholding on payments received that exceeded the actual liability.
- Overpayments carried forward from an earlier year and never reconciled.
The Rest of the Position Still Stands
A refund expiring does not remove the obligation to file. The returns are still required, the CRA can still demand them, and the years remain open for assessment even after they have closed for refund purposes.
That asymmetry is worth understanding plainly. The CRA’s right to assess you outlasts your right to be paid, so waiting is never neutral.
The Order to Work In
- Establish the year ends, because a non-December year end changes every date on this page.
- Check what each year is worth before spending money on the bookkeeping, since a year with no refund and no loss is lower priority.
- File the oldest year still within three years first, because it is the one about to close.
- Check the SR&ED position separately, since those deadlines have usually passed first.
- Then work forward through the remaining years.
- Fix the filing calendar, because the same pattern repeats otherwise.
What This Calculator Does Not Cover
- Varying amounts between years, since the same figures are applied to each
- Capital losses, which have their own rules
- Provincial credits outside Ontario
- The interaction with unfiled HST and payroll, which usually accompany this
- Whether the SR&ED work actually qualifies, which is a technical question
- Interest on refunds, which the CRA pays at a lower rate than it charges
Check what you are owed before assuming filing will cost you money. A good number of corporations several years behind are owed a refund and never look. Our catch-up corporate tax filing service covers the assessment and the returns.
Frequently Asked Questions
Common questions on corporate refunds and late filing.
Related Calculators and Guides
More tools for corporations behind on filings.
Check What You Are Owed Before Assuming It Will Cost You
Send us the year ends and whatever records exist. We will work out what each year is worth, file the ones closest to expiring first, and tell you honestly which years are no longer worth the bookkeeping.