Structure

What a loss year is worth, and why you still have to file a T2

Every corporation files a T2 even with no income. An operating loss carries back 3 years or forward 20, refunding tax at the rate of the year it's applied to.

By Matthew Reeves, FounderAugust 16, 2026 · 8 min read

Summary

If your corporation lost money this year, you’re really asking two separate questions.

Filing comes first, and it isn’t optional. Every corporation resident in Canada files a T2, which is your corporation’s income tax return, for every year it exists, including a year with no income and no tax to pay.¹ The return is due six months after your fiscal year ends (i.e. June 30 2027 for a December 31 2026 year-end), and almost every corporation now has to file it online.²

A loss is then worth much less than its face amount. It reduces the profit your corporate tax rate is applied to, rather than the tax itself. What the corporation gets back is the loss multiplied by the rate of whichever year it’s applied to. The refund goes to the corporation, not to you personally, and getting it into your own hands is a separate decision with its own tax. An operating loss, called a non-capital loss in tax language, goes back against the three fiscal years before the loss year, or forward against the next twenty.³

We generally recommend closing the books early, filing well ahead of the deadline, and carrying the loss back against whichever of those three years was taxed at the highest rate. What would flip that is a corporation whose profit stayed under $500,000 in all three years, so each was taxed at the low 9% federal rate. That corporation also needs hard evidence that much bigger profits are coming, not just optimism.

Filing a T2 in a year with no income

The obligation doesn’t depend on whether your corporation earned anything, owed anything, or did anything at all. Dormant companies file too (e.g. a holding company that exists on paper and does nothing else), and the handful of exceptions won’t cover an owner-managed business.¹ The online-filing rule is nearly as broad, since the exceptions are insurers, non-residents and a few specialised cases.²

Skipping the return is tempting. The late-filing penalty is worked out as a percentage of the tax you owe, and a percentage of nothing is nothing, so in a genuine nil-tax year that particular penalty is unlikely to bite.⁴ Note that the deadline for paying corporate tax comes earlier than the deadline for filing it, two or three months after year-end rather than six.⁵

Three other costs don’t care whether tax is owing. The $1,000 penalty for filing on paper when you were required to file online is a flat amount. Instalments are the advance tax payments the Canada Revenue Agency (CRA) asks a corporation to make during the year. They only come back if that year’s return is filed within three years of its year-end, and the CRA keeps the money otherwise.⁶ And a loss the CRA was never told about doesn’t exist in its records, so there’s no balance sitting there for you to use later.

What a loss is actually worth

The loss on your income statement isn’t the loss the tax rules recognise. Schedule 1 of the T2 adjusts one into the other, so your tax loss can land well above or well below the cash the year felt like it cost.⁷

What it’s worth is then set by the tax rate of the year it’s applied to, because that rate is what the refund is calculated at. Federally in 2026, a Canadian-controlled private corporation (i.e. a private company controlled by Canadian residents rather than by a public company or by non-residents) pays 9% on the first $500,000 of active business income, meaning profit from running the business. Profit above that limit is taxed at 15%. Money the corporation earns on cash and property it’s holding, such as interest and rent, is taxed at roughly 38.67% instead.⁸ So the same dollar of loss recovers about 9, 15 or 38.67 cents federally, depending on what the year it lands in was actually taxed at. Your province charges its own corporate rate on top of each of those, which puts the small-business figure between 9 and roughly 12 cents in total.⁹

A year with investment income is therefore the richest target, and the one to take advice on first. Pulling tax back out of it interacts with any dividend refund the corporation has already had.

This guide is about operating losses. A loss from selling an investment may be a capital loss, while depreciable assets follow separate terminal-loss rules, both outside this guide.¹⁰

Carrying the loss back, or carrying it forward

Both directions are available for the same loss, and you can split it between them. Splitting means someone has to track how much of the loss is left unused, and carry that figure forward correctly on every future return.

Carrying it back to the first, second or third preceding fiscal year is a request you make on Schedule 4, the page of the T2 called Corporation Loss Continuity and Application.¹¹ The refund is of tax the corporation has already paid, so it doesn’t depend on the business earning anything again. The cost is the rate: the loss is consumed at whatever the earlier year was taxed at, which is only 9% federally where that year’s profit sat inside the $500,000 limit.

Carrying it forward, for up to twenty years, buys the chance to use the loss against profit taxed at 15% rather than 9%.³ The cost is that no cash arrives in the year the corporation most needs it. Its value also depends on a lot: the business surviving, earning taxable profit, control not changing hands, and twenty years not running out. A carryback depends on nothing beyond tax already paid.

You choose how much of the loss goes where, and which years it lands in. The restrictions are about losses rather than years. Where a corporation carries losses from more than one year, the oldest has to be used up first. A loss brought in from another year can reduce a profitable year to zero, but not push it into a loss of its own.¹² Our default is to carry back against whichever of the three preceding years was taxed at the highest rate, and take the cash. All three years are equally open, so the rate the loss is consumed at is the only thing separating them. We’d hold it forward instead only where all three years sat under $500,000, and something concrete backs the forecast of bigger profits (e.g. a signed contract or a hire already made).

Where no tax was paid in any of the three preceding years there’s nothing to carry back to, so the job is protecting the carryforward. File, report the loss on Schedule 4, and don’t claim tax depreciation you’d rather save for a profitable year.

Timing and the carryback deadline

Filing early is where we’d put the effort first, ahead of optimising which of the three preceding years to aim at. Interest on the refund a carryback produces doesn’t start until 30 days after the loss-year return is filed,¹³ and the CRA works on the carryback only once it has finished assessing that return, so filing is what starts both clocks.¹⁴ The honest cost is paying an accountant to close and check the books at the exact moment cash is tightest.

The carryback request has its own deadline, and it’s the date your loss-year return was due, six months after year-end, rather than the date you actually file. Filing early doesn’t buy extra time for it, and filing late doesn’t extend it. Up to that date the CRA is obliged to reassess the earlier year, meaning reopen a year it has already processed and recalculate the tax.¹⁵ After that date it’s no longer required to reopen anything. The CRA may still agree to, but you can’t insist, so treat the refund as at risk. If a carryback is coming, get the return in before the six-month date even if nothing else is ready.

Before a change of control

Where control of the corporation is acquired by a person or by a group of people, capital losses from before that point can’t be used in any year ending after it, and no later capital loss can reach back past it. Operating losses survive, but only against profit from the same line of business, and only while that business is still run with a reasonable expectation of profit, so mothballing it after a sale forfeits them.¹⁶ There is sometimes a way to rescue the trapped capital losses, by triggering gains on property the corporation already owns just before control changes, but that has to be planned before the deal closes. If a sale is realistic within a year or two, take the carryback now.

How often this changes

The carry-back and carry-forward periods and the obligation to file are stable, and what moves underneath them are the rates. Federal and provincial corporate rates change with budgets, and a loss is worth the rate of the year it lands in. A rate change therefore alters both what the loss is worth and which of the three preceding years you should aim at. Re-run the back-or-forward decision every loss year rather than repeating last year’s answer.

Closing thoughts

Which year you aim at sets how much the loss is worth. In our view it still isn’t what decides how a loss year turns out, because a loss nobody prepares and files is worth nothing at all. A year with almost no revenue feels like a year with nothing to report, and yet the loss balance and the refund both depend on reporting it. If a bad year is why you’re reading this, book the appointment with your accountant sooner than you normally would, not later.

How we handle it

We close the year-end and file the T2 with Schedule 4 attached as soon as the books are reconciled, rather than waiting out the six-month window. Before filing we compare what each of the three preceding years was taxed at, and decide how much of the loss goes back and where. If the corporation stopped its advance tax payments partway through the year, or is still carrying a balance from the year before, we sort both out as part of the same engagement.

Sources: CRA, “Corporation income tax return”, and CRA Guide T4012, “Before you start”. The filing obligation sits in Income Tax Act subsection 150(1), which requires a corporation resident in Canada to file within six months after the end of the year. The T4012 exceptions are tax-exempt Crown corporations, Hutterite colonies and registered charities. Verified 2026-08-16. ↩ ↩²
Source: CRA, “Corporation income tax return”, on mandatory electronic filing for tax years starting after 2023, and on the $1,000 penalty for filing on paper where electronic filing was required, which is in Income Tax Act subsection 162(7.2). The exceptions are set by Income Tax Regulation 205.1(2): insurance corporations, non-resident corporations, corporations that have elected to report in a foreign currency, and corporations exempt from tax under section 149. Verified 2026-08-16. ↩ ↩²
Sources: Income Tax Act paragraph 111(1)(a), and CRA Guide T4012, Chapter 3. The CRA’s wording is that a current-year non-capital loss can reduce any kind of income for the 20 following tax years and the 3 previous tax years, and that the loss expires after the carry-forward period. Verified 2026-08-16. ↩ ↩²
Sources: CRA, “Avoiding penalties” (corporation payments), and Income Tax Act subsection 162(1), which computes the penalty on the tax payable for the year that was unpaid when the return was required to be filed, not on the corporation’s overall account balance. Where tax is unpaid the penalty is 5% of that amount, plus 1% of the same amount for each complete month the return is late, to a maximum of twelve months. A higher penalty of 10% plus 2% a month, to a maximum of twenty months, applies under subsection 162(2). It reaches only a corporation that the CRA has formally demanded a return from under subsection 150(2), and that was already liable to a failure-to-file penalty in any of the three preceding years. Verified 2026-08-16. ↩
Sources: Income Tax Act paragraph 157(1)(b), and the definition of “balance-due day” in subsection 248(1). For a corporation the balance-due day is three months after year-end where the small business deduction was claimed and the associated-group conditions are met, and two months otherwise. In a genuine loss year there is nothing to pay, but a loss smaller than expected means arrears interest has been running from that earlier date. Verified 2026-08-16. ↩
Source: Income Tax Act subsection 164(1). A refund is permitted only where the return for the year was filed within three years from the end of that year. Verified 2026-08-16. ↩
What Schedule 1 adds back is out of scope here, and the gap runs both ways. The common add-backs for an owner-managed corporation all shrink the loss. They are the half of meals and entertainment that isn’t deductible (Income Tax Act subsection 67.1(1), and the 50% figure is stated in full on /guides/how-much-to-set-aside/), club dues (paragraph 18(1)(l)), and fines and penalties (section 67.6). Salary or bonus recorded as owing to the owner but unpaid 180 days after year-end is added back too, under subsection 78(4). Capital cost allowance runs the other way. It’s tax depreciation, spreading the cost of a truck or a laptop over several years, and it’s permissive. Claiming more of it enlarges the loss, and claiming less keeps the balance for a later year. Verified 2026-08-16. ↩
Sources: CRA, “Corporation tax rates”, and Income Tax Act sections 123.3 and 123.4. The basic federal rate is 38%, falling to 28% after the federal abatement and to a net general rate of 15% after the general tax reduction. A CCPC claiming the small business deduction pays 9%. The abatement and the general reduction are mechanical steps inside the calculation rather than choices an owner makes, and the only rates that matter here are the 9%, 15% and 38.67% end results. The roughly 38.67% is 28% after the abatement (section 123.4 excludes a CCPC’s aggregate investment income from full rate taxable income, so the general reduction doesn’t reach it) plus the 10 2/3% additional refundable tax in section 123.3. The 9% rate and the $500,000 business limit are stated in full on /guides/what-changed-for-2026/. Verified 2026-08-16. ↩
Source: CRA, “Corporation tax rates”, provincial and territorial table. Lower rates ran from nil to 3.2% and higher rates from 11.5% to 15%, which puts the small-business total between 9% and roughly 12.2%, and the general total between roughly 26.5% and 30%. That table excludes Alberta and Quebec, which collect their own corporate tax, so a corporation filing in either province has a separate provincial carryback to make and its own provincial rate. The page was last updated 2025-05-30, so it doesn’t show Ontario’s lower rate falling to 2.2% on July 1 2026. Provincial business limits also differ from the federal $500,000 in Nova Scotia, Prince Edward Island and Saskatchewan. Verified 2026-08-16. ↩
Sources: Income Tax Act paragraph 111(1)(b), and CRA Guide T4012, Chapter 3. A capital loss can be used only against gains on other things sold, never against profit from running the business, and it carries back three years and forward with no time limit. Schedule 4 records the full amount, and only half of it is usable. The halving is applied when the loss is claimed rather than when it is recorded, so the figure on the form looks twice as large as its real value. Verified 2026-08-16. Scope wording clarified 2026-09-25: depreciable-property losses do not automatically become capital losses. See CRA Capital losses and deductions and the terminal-loss rules in Income Tax Act 20(16). ↩
Sources: CRA Form T2 SCH 4, Corporation Loss Continuity and Application (code 2401, for 2024 and later tax years), and CRA Guide T4012, Chapter 3. Lines 901, 902 and 903 request the carryback of an operating loss to the first, second and third preceding year, and lines 951 to 953 do the same for capital losses. The CRA allows the request to be attached to the return or sent separately to your tax centre. Form T2A is archived and should not be used. Verified 2026-08-16. ↩
Sources: CRA Guide T4012, Chapter 3, and Income Tax Act paragraph 111(3)(a). You can choose whether or not to deduct an available loss, and you can deduct losses in any order. For each type of loss the oldest available one comes first. A loss is also deductible only to the extent it exceeds amounts already deducted for it in earlier years. Except for net capital losses, losses brought in from other years cannot create or increase a non-capital loss for the year they are applied to. The loss restriction event rules under “Before a change of control” are a further constraint. The CRA publishes your corporation’s loss balances through the “View return balances” service in My Business Account, or in Represent a Client for an authorised representative. Verified 2026-08-16. ↩
Source: Income Tax Act subsection 164(5). Refund interest on the overpayment a carryback creates runs from 30 days after the latest of three dates. The three are the day after the loss year ended, the day the loss-year return was filed, and the day the carryback request was filed. For a corporation filing on time that means 30 days after filing. Arrears interest on an earlier year’s unpaid balance works the same way under subparagraph 161(7)(a)(iv), so a carryback doesn’t stop that interest running until the same point. Verified 2026-08-16. ↩
Source: CRA Guide T4012, “Before you start”, which records a service pledge rather than a guarantee: the CRA will process 95% of T2 returns filed electronically within 45 days. That clock covers the loss-year return itself, and the carryback can only be applied once the loss for the year has been assessed, so plan on months rather than weeks. Verified 2026-08-16. ↩
Source: Income Tax Act subsection 152(6), which fixes the obligation at the day the loss-year return is required by section 150 to be filed. Where the request misses that date, paragraph 152(4)(b) permits a reassessment made before the day that is three years after the end of the receiving year’s normal reassessment period. Under subsection 152(3.1) that period runs three years from the original notice of assessment for a CCPC, and four years for other corporations. The taxpayer-relief route in subsection 152(4.2) is open to individuals and graduated rate estates only, so a corporation has no equivalent backstop. Verified 2026-08-16. ↩
Sources: Income Tax Act paragraph 251.2(2)(a), which defines the trigger as control of the corporation being acquired by a person or group of persons, with subsections 111(4), 111(5), 111(5.1) and 249(4). The trigger reaches share transfers to a group and some reorganisations and estate transfers, under deeming rules beyond this guide, so it is worth checking before any share transaction rather than only before a sale. Paragraph 111(5)(a) preserves a pre-event non-capital loss only where the business is carried on for profit, or with a reasonable expectation of profit, throughout the claiming year (subparagraph (i)). The loss is then deductible only against income from that business, or from a business deriving substantially all its income from similar properties or services (subparagraph (ii)). Paragraph 111(4)(e) allows the corporation to designate property and realise accrued gains immediately before the event, absorbing capital losses that would otherwise be blocked. That designation is filed with the return for the year ending immediately before the event, or on a prescribed form within 90 days of the assessment. A deemed year-end arises on the change of control, meaning the tax year is treated as ending that day with a new one starting. That uses up one of the twenty carryforward years even though less than twelve months has passed. Depreciable property is written down to fair market value under subsection 111(5.1). CRA Form T2 SCH 4 states the subsection 111(4) and 111(5) rules on its first page. Interpretation Bulletin IT-302R3 is archived and predates the 2013 loss restriction event rewrite, so it isn’t relied on here. Verified 2026-08-16. ↩

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