Our corporate tax filing guide covers the rules: who has to file, what the rates are, what the penalties cost. This page is the other half. It is the actual sequence of doing the work, in the order you do it, from a shoebox of transactions to a filed return and a paid balance.
It is written for a Toronto owner-managed corporation with one location, a handful of employees or none, and a December or other calendar-ish year end. If you are doing this yourself, follow it top to bottom. If you are hiring someone, it tells you what you are paying for and where the work actually goes wrong.
What you need before you start
Gather these first. Half the pain of a T2 is stopping midway to hunt for something.
- Your business number (the nine digits, plus the RC0001 program identifier) and your Ontario corporation number.
- Your articles of incorporation, so you can confirm the incorporation date and jurisdiction.
- Last year's T2 and notice of assessment, which carry forward your loss balances and asset pools.
- Complete bookkeeping for the full fiscal year, with every bank and credit card account reconciled.
- Bank statements, loan statements, and payroll records for the year.
- Details of shareholder transactions: money you put in, money you took out, and how you classified it.
Step 1: Confirm your tax year end and your filing deadline
Your corporation's tax year is its fiscal period, and unlike a sole proprietor you get to choose it. Whatever you chose in year one is what the CRA now expects, so check last year's return rather than assuming December 31.
The filing deadline is six months after the end of the tax year. There is a wrinkle almost every guide skips: the rule differs depending on whether your year ends on the last day of a month.
- If your year end is the last day of a month, file by the last day of the sixth month after.
- If your year end is not the last day of a month, file by the same day of the sixth month after.
| Tax year end | Filing deadline |
|---|---|
| March 31 | September 30 |
| June 30 | December 31 |
| August 31 | February 28 |
| September 23 | March 23 |
| October 2 | April 2 |
Note the last two rows. A September 23 year end is due March 23, not March 31. If you incorporated mid-month and never changed your year end, this is you.
Step 2: Close the books and reconcile everything
Nothing downstream works if this step is wrong, because the T2 is built directly on your financial statements. Before you touch a tax form:
- Reconcile every bank and credit card account to the statement balance at year end.
- Clear the suspense and uncategorized accounts to zero.
- Reconcile your HST filings to the HST payable account.
- Reconcile payroll to your T4 summary, if you have employees.
- Confirm the shareholder loan account balance and know what each entry in it actually was.
- Record year-end adjustments: depreciation, accruals, prepaid expenses, and inventory counts.
If your books are months or years behind, this is where you stop and fix that first. Our catch-up bookkeeping guide covers what that costs and how far back you need to go.
Step 3: Convert your financial statements to GIFI
The CRA does not accept your accounting software's PDF financial statements. It wants them in the General Index of Financial Information, a standardized numbering system that maps every account to a common code so the CRA can read every corporation's statements the same way. In practice this means three schedules:
| Schedule | What it is |
|---|---|
| Schedule 100 | Balance sheet information |
| Schedule 125 | Income statement information |
| Schedule 141 | Notes checklist, which tells the CRA who prepared the statements and at what level of assurance |
Certified tax software will map most accounts for you if your chart of accounts is tidy. The usual failure is a pile of vague custom accounts that nothing maps to cleanly, which is a bookkeeping problem showing up at tax time.
Step 4: Choose the right return, full T2 or T2 Short
The T2 Short Return is a two-page version of the nine-page T2, plus Schedule 1, and possibly Schedule 8 and Schedule 50. You can use it if your corporation falls into one of two categories:
- It was a Canadian-controlled private corporation throughout the tax year and this year has either nil net income or a loss for income tax purposes, or
- It is exempt from tax under section 149, for example many non-profit organizations.
And it must also meet all of these conditions:
- a permanent establishment in only one province or territory
- not claiming any refundable tax credits, other than a refund of instalments it paid
- it did not receive or pay out any taxable dividends
- it is reporting in Canadian currency
- it does not have an Ontario transitional tax debit
- it does not have an amount calculated under section 34.2
Miss any one and you file the regular T2. In plain terms: a dormant holding company or a first-year corporation sitting on a loss usually qualifies. A profitable business that paid you a dividend does not.
Step 5: Fill in the identification pages
Page 1 of the T2 is administrative, and getting it wrong is the most common cause of a rejected transmission. You need your business number, legal name exactly as it appears on your articles, the head office address, the tax year start and end dates, your country of residence, and the type of corporation at year end (for most Toronto small businesses, a Canadian-controlled private corporation).
You also select a NAICS code describing your main revenue-generating activity. Pick it carefully the first year, because it carries forward and a mismatched code is a soft audit signal.
Step 6: Work through the schedules that apply
This is the part that looks intimidating and is mostly mechanical. You do not file all of these. You file the ones your situation triggers.
| Schedule | What it does | Who needs it |
|---|---|---|
| Schedule 1 | Reconciles accounting net income to net income for tax purposes, adding back non-deductible items | Effectively everyone |
| Schedule 8 | Capital cost allowance, the tax version of depreciation, tracked by asset class | Anyone who owns equipment, vehicles, or computers |
| Schedule 50 | Shareholder information for anyone holding 10% or more of any class of shares | Almost every owner-managed corporation |
| Schedule 3 | Dividends received and dividends paid | Anyone who paid themselves dividends |
| Schedule 4 | Continuity of losses, carrying non-capital losses back three years or forward twenty | Anyone with a loss year, past or present |
| Schedule 7 | Aggregate investment income and active business income split | Corporations with interest, rent, or investment income |
| Schedule 500 | Ontario corporation tax calculation | Every Ontario corporation |
Schedule 1 is where the tax knowledge lives. It is the form that adds back the 50% of meals you cannot deduct, removes accounting depreciation and replaces it with capital cost allowance, and strips out anything else the Income Tax Act treats differently from accounting standards. Our write-offs checklist covers which items get adjusted and why.
Step 7: Claim the small business deduction and calculate your Ontario tax
If your corporation is a CCPC earning active business income, the small business deduction reduces your rate on the first $500,000 of active business income. That is the federal business limit and the Ontario one.
As of July 1, 2026, Ontario cut its small business rate from 3.2% to 2.2%, which puts the combined federal and Ontario small business rate at 11.2%.
| Rate | Federal | Ontario | Combined |
|---|---|---|---|
| Small business rate, first $500,000 of active income (CCPC) | 9% | 2.2% from July 1, 2026 | 11.2% |
| General corporate rate, income above $500,000 | 15% | 11.5% | 26.5% |
The cut took effect part-way through the calendar year, and Ontario prorates the old and new rates by days for a tax year that straddles July 1, 2026. A December 31, 2026 year end gets 181 days at 3.2% and 184 days at 2.2%, which blends to roughly 2.70% Ontario and 11.7% combined for that year, not 11.2%. The clean 11.2% arrives with your first full fiscal year after the change. On $200,000 of active income the difference is about $1,000, which is enough to matter when you are estimating your balance owing.
Worth knowing while you are in here: plenty of competing 2026 guides, and the AI summaries built on top of them, still quote Ontario's combined small business rate as 12.2%. That was correct until June 30, 2026 and is not correct now.
Step 8: File electronically
For tax years starting after 2023, corporations have to file the T2 electronically. The only exceptions are insurance corporations, non-resident corporations, corporations reporting in a functional currency, and corporations exempt from tax under section 149. Filing on paper when you were required to file online triggers a $1,000 penalty.
One trap: printing the T2 bar code return and mailing it still counts as a paper return, and still attracts that penalty. The bar code is a convenience for the CRA's scanners, not a way around the electronic filing rule.
To transmit, you prepare the return in CRA-certified software and send it through one of:
- the CRA's Corporation Internet Filing service, using a web access code
- My Business Account, if you are the business owner, using "Transmit a return", which needs no web access code
- Represent a Client, if you are an authorized representative
If someone else transmits on your behalf, you sign Form T183 CORP authorizing them. Your accountant keeps it on file; it is not sent with the return.
Step 9: Pay the balance, and check whether instalments start
The single most misunderstood thing about corporate tax is that your money is due before your paperwork. The balance is generally due two months after your year end. You get three months only if you meet conditions 1 and 2, plus 3 or 4:
- the corporation was a CCPC throughout the tax year
- it claimed the small business deduction in the current or previous tax year
- if unassociated: its previous-year taxable income did not exceed its business limit for that year
- if associated: the combined taxable income of the associated group did not exceed their combined business limits
For a December 31 year end with three-month eligibility, that is a March 31 payment deadline against a June 30 filing deadline. You need reliable draft numbers by late February, which is exactly why year-end is painful for businesses whose books are not current.
Then check instalments, which are the thing that ambushes people in year two:
- You do not pay instalments in your first tax year after incorporation.
- You do not pay instalments in any year where tax payable is $3,000 or less in either the current or the previous tax year.
- Otherwise instalments are monthly, or quarterly for eligible small CCPCs.
The ambush: your second-year instalments can start before you have even paid your first-year balance. Set the money aside as you go rather than discovering it at year end.
Step 10: File your Ontario annual return, separately
This is the step Toronto owners miss most often, and it is a genuine trap because the two filings sound identical.
Your T2 is an income tax return filed with the CRA. Your Ontario annual return is a corporate law filing that confirms your registered office and directors with the province. They are different filings with different regulators.
They used to travel together. Until May 15, 2021 the CRA collected the Ontario annual return on the province's behalf as Schedule 546 attached to the T2. On that date the CRA stopped, and Schedules 546, 547 and 548 and Form RC232 were removed. Since the Ontario Business Registry launched on October 19, 2021, the annual return is filed directly with the province through that registry, and it will not be accepted if you try to send it with your T2.
If you incorporated before 2021, or you are following a guide written before then, you may believe your accountant is handling this inside the T2. Since 2021, nobody is, unless you asked them to. It is free to file and it is filed within six months of your fiscal year end.
What happens after you file?
The CRA's published service standard is to process 95% of electronically filed T2 returns within 45 days. You then get a notice of assessment, which either agrees with your return or changes it.
File late and the penalty is 5% of the unpaid tax due on the filing deadline, plus 1% of that unpaid tax for each complete month the return is late, up to 12 months. If the CRA had to issue a demand to file and you were assessed a failure-to-file penalty in any of the three previous years, it rises to 10% plus 2% per complete month, up to 20 months. Interest compounds daily on top.
Keep your records for six years from the end of the last tax year they relate to. If you are filing years late, the Voluntary Disclosures Program is worth reading about before you file anything, because coming forward unprompted is worth 100% of the applicable penalties and 75% of the applicable interest. Details in our catch-up bookkeeping guide.
Can you do this yourself?
Legally, yes. Nothing requires a CPA to prepare a T2, and for a dormant corporation filing a nil return, doing it yourself with certified software is entirely reasonable.
It gets risky fast once real numbers are involved, and the reason is specific: the T2 is full of balances that roll forward. Capital cost allowance pools, non-capital losses, the capital dividend account, shareholder loan balances. An error in one of those does not stay in one year. It quietly propagates until someone notices, and the fix is a set of amended returns.
The honest test is whether you can answer these without looking them up: which asset class your laptop belongs to, whether that shareholder withdrawal was a loan or a dividend, and whether your loss should be carried back or forward. If those are unfamiliar, the return is not the hard part; knowing what should be on it is.
In Toronto, year-end financial statements plus a T2 usually run $1,500 to $4,000 as a standalone job when the books are clean, and full-service monthly accounting that includes the T2 usually runs $1,000 to $3,000 per month. Our guide to choosing a small business accountant in Toronto covers what to ask, and how the two decisions you make at the same time as your T2, your salary and dividend mix and whether incorporating still suits you, are usually worth more than the filing fee itself.
Filing a T2 correctly is a solvable problem. Filing it in a way that saves you money is a different job, and it happens months earlier. By the time you are on Schedule 1, every decision that mattered has already been made. If your only conversation with an accountant happens after year end, you are buying compliance and calling it planning.
Frequently asked questions
How do I file a T2 corporate tax return in Toronto?
Close and reconcile your books for the fiscal year, convert your balance sheet and income statement into the CRA's GIFI format on Schedules 100 and 125, complete Schedule 1 to convert accounting profit into taxable income, add the schedules that apply to your situation, then transmit the return through CRA-certified tax software. The return is due six months after your fiscal year end, and almost every corporation is now required to file electronically.
What schedules do I have to file with a T2 return?
Almost every corporation files Schedule 100 (balance sheet), Schedule 125 (income statement) and Schedule 141 (notes checklist) as its GIFI financial statements, plus Schedule 1 to reconcile accounting profit to taxable income. Beyond that it depends: Schedule 8 for capital cost allowance, Schedule 50 for shareholders who own 10% or more, Schedule 3 for dividends, Schedule 4 for loss continuity, Schedule 7 for investment income, and Schedule 500 for the Ontario tax calculation.
Do I file my Ontario annual return with my T2?
No, and this catches a lot of Ontario owners. The CRA stopped collecting the Ontario annual return on the province's behalf on May 15, 2021, when Schedules 546, 547 and 548 and Form RC232 were removed from the T2. Since the Ontario Business Registry launched on October 19, 2021, the annual return is filed directly with the province through that registry. It is a separate corporate law filing from your T2 income tax return, and filing one does not file the other.
When is my corporate tax balance actually due?
Generally two months after the end of your tax year. You get three months instead if your corporation was a Canadian-controlled private corporation throughout the year, claimed the small business deduction in the current or previous year, and had taxable income in the previous year that did not exceed its business limit (or, for an associated group, the group's combined taxable income did not exceed its combined business limits). Note that the payment deadline arrives three to four months before the six-month filing deadline.
Do I have to pay corporate tax instalments in my first year?
No. Corporations do not have to make instalment payments for most corporate taxes in their first tax year after incorporation, and you also do not have to pay instalments in any year where tax payable is $3,000 or less in either the current or the previous tax year. You still owe the full balance by your balance-due day. Many owners get caught in year two, when instalments can start before the first year's balance has even been paid.
How long does the CRA take to process a T2 return?
The CRA's published service standard is to process 95% of electronically filed T2 corporation income tax returns within 45 days. Paper returns take considerably longer, which is one more reason to file electronically even in the narrow cases where paper is still permitted.
Can I file my own T2 without an accountant?
Legally, yes. You can buy CRA-certified software and transmit the return yourself through My Business Account. It is realistic for a dormant or very simple corporation. It gets risky once you have capital assets, shareholder loans, dividends, or losses to carry forward, because those figures roll forward for years and an error compounds. In Toronto, year-end financial statements plus a T2 usually run $1,500 to $4,000 when the books are clean.
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