All companies must file a T2 return every year on a fiscal period basis, within six months following year-end, even if there was no income earned by the corporation. This is how to file small business corporation taxes for 2026: filer details, key dates, forms needed, and silent tax laws that will affect your bottom line.
About the figures: The federal rate/limits given are valid for 2025 and 2026 only. Provinces tend to update theirs more frequently; please verify the applicable rates for your fiscal period.
Who must file
Incorporated companies must file. They have no income threshold, no small business exemption, nor do they get a year off if there were no sales. It begins from the date of incorporation and stops only when the company is dissolved.
It will cover more businesses than you would imagine. If the business did not trade, it must file a nil return. A company that stopped trading two years ago but was never formally closed down has to file for those two years. A company that made losses has to file as well since those losses have to be filed first before they can be carried forward.
The sole proprietor files their business income together with their personal income on form T2125. Partnerships don’t file anything.
What constitutes a full filing
A T2 filing isn’t just one form. It consists of the T2 return itself, financial statement data coded according to the GIFI chart of the CRA (Schedules 100, 125 and 141), any other schedules applicable for that year, and provincial calculations in most provinces. It is compiled by the software, but the data comes from the company’s accounting.
Monthly reconciliation of the ledger produces a return in no time. If you haven’t done anything with it since last year, year-end starts with cleaning up discrepancies: discrepancies between your bank accounts and statements, unclassified card payments, HST collected but not reported. All of this needs to be done regardless. Doing it in June, under pressure of deadlines, is what makes it costly.
Filing and paying are two separate responsibilities, and a T2 return is related to income taxes only. HST, payroll and information slips have their own due dates.
The Two Deadlines
The deadline for filing T2 is six months after your fiscal year-end. However, for the balance due, you have only two months after year-end to pay, three months if you were a Canadian-controlled private corporation which made the small business deduction and met all other conditions. In case your year-end was June 30, your deadline will be December 31 and August 31.
| Corporation | File by | Pay by |
| CCPC claiming the small business deduction | 6 months after year-end | 3 months after year-end |
| Other corporations | 6 months after year-end | 2 months after year-end |
| Nil return or loss | 6 months after year-end | Nothing owing |
Deadline: The three-month deadline is not automatic. It is dependent on the deduction being claimed, and also for the taxable income to fall under the threshold of the business level, the associated corporations are considered collectively. If you miss either one, the balance would be due after two months.
Schedules that most small businesses require
The schedule is dictated by your facts, not chosen from a list. The typical owner-operated business will file five to six. Throw in a second business, dividend income or property, and you have more.
| Schedule | Covers | Applies when |
| 100, 125, 141 | Balance sheet, income statement, notes checklist | Every corporation |
| 1 | Accounting income to taxable income | Almost always |
| 8 | Capital cost allowance | You own equipment, vehicles or buildings |
| 50 | Shareholder information | A shareholder holds 10% or more of any share class |
| 7 | Investment income and the small business deduction | You claim the deduction or earn investment income |
| 23 | Business limit allocation | You have associated corporations |
| 88 | Internet business activities | Income comes from websites or online storefronts |
These two are worth considering. Schedule 88 covers more businesses than what the owners think, as an order taking site, listing that produces leads or a store front on another party’s platform is included. Schedule 50 must tally with your share register and minute book, which most small businesses fail to update after a share transfer.
Small Business Deduction and what diminishes it
Small Business Deduction lowers the federal tax rate on the first $500,000 of active business income from 15% to 9% for the years 2025 and 2026. On top of this, Ontario will apply its own lower tax rate. For an individual to be eligible, the corporation should be a CCPC during all of the year, and the income should be active business income rather than passive.
This $500,000 threshold might be reduced by two different reductions. One reduction is the taxable capital employed in Canada. It reduces the threshold starting from $10 million up to the point when it fully reduces the threshold to $50 million. The other reduction is the adjusted aggregate investment income. It starts reducing the threshold from $50,000 up to the point when it fully reduces the threshold to $150,000.
Common mistake: Investment Income reduction hits those owners who generate profit and retain earnings in the portfolio where interests and gains reduce the very deduction they were trying to benefit from.
Associated corporations and the shared limit
An association has only one $500,000 limit that it allocates using Form 23. Separateness does not entitle it to get another deduction. Control governs.
Companies are associated where one controls the other, where the same individual or group controls both, and in many other ways such as relations of family members and holdings of shares in companies. Companies where one acts as a holding company for the other and where spouses have separate companies are associated depending on the shareholdings.
The allocation is optional and should be deliberate. Where one company makes $400,000 in active income and the other $50,000, allocating the limit according to the income keeps the income in the 9% rate bracket. An even allocation would waste part of it. The form needs to be filed for the allocation to apply.
Instalments and interest
Your corporation must pay any taxes owed above $3,000 in the current or prior year by installments over the year, on a monthly basis by default. Small CCPCs eligible for the special treatment may pay quarterly. To be eligible, the corporation must have claimed the small business deduction, remained under the business limit and $10 million taxable capital limit with its associates, and had no non-compliance issues for the last twelve months. A single missed payment moves the corporation to the monthly installment plan.
New corporations do not make installments in their first year, but taxes are still payable at the end of the first year. This often comes as a surprise to owners who have never set aside funds for tax purposes before.
PlanningTip: Interest on unpaid corporate tax compounds daily and is not deductible. Paying a fixed percentage of revenues every month sounds boring, and it works.
Not sure what installment plan your corporation should use? Consult a licensed CPA about your deadlines and installment method. [Book a consultation]
Paying yourself and shareholder loans
The way you get paid dictates how you file taxes. Payroll is deductable, requires payroll accounts and remittances, and generates a T4 slip. Dividends are not deductible and generate T5 slip. T4 and T5 slips must be filed by the last day of February of the year following your calendar year, quite some time away from your T2 deadline. Payroll creates RRSP contribution room and CPP credits, while dividends do not.
Shareholder loans have the strictest rule. The money you loaned from your company is included in your personal income, unless repaid within one year from the end of the fiscal year during which the money was borrowed. Watch the account in month 10, not month 14.
Penalties, records and what draws a review
The late filing penalty is 5% of the tax unpaid at the deadline plus 1% for each full month, up to 12 months. In case of a demand by the CRA, and the assessment of a late-filing penalty in any of the three preceding years, the late filing penalty is 10% plus 2% per month up to 20 months. Interest on the balance owing is computed separately, so even if you file your return on time but have tax owing, interest will accumulate.
Keep your records for six years after the end of the tax year to which they relate. Keep your incorporation papers, share register and minute books permanently.
Reviews generally begin with normal indicators: a shareholder loan increasing annually, expenses for travel, meals and vehicles that appear excessive relative to the revenue, a gross margin that spikes without an explanation, and third-party slips that do not tally with your return. A working paper file documenting how each number was calculated, maintained at the time, covers most of it.
| 9% | federal rate on the first $500,000 of active business income |
| 6 months | after year-end to file the T2 |
| 5% + 1% | late-filing penalty, plus 1% per full month up to 12 |
| 6 years | minimum record retention |
FAQ’s
Frequently Asked Questions
Do I have to file a T2 if there is no income for my corporation?
Yes, since an incorporated business file returns every year it exists, regardless of activity or inactivity. It just means that the return would be nil, and not filing means having an unfiled year, which has to be fixed before dissolution.
When should I file my corporate tax return?
Within six months from the end of your fiscal year. Note that the tax is actually paid earlier, within two months or three months if it is a CCPC and qualifies for the small business deduction.
Can I file my T2 myself?
Yes, through certified CRA software. But the risk here is in the judgment in filling out the form: deductibility, shareholder loan account, association and GIFI.
What will happen if I file late?
The penalty is 5% of the unpaid tax amount plus 1% per month, up to 12 months, and 10% plus 2% per month after that for repeated late filers.
Is my corporation taxed on an installment basis?
Yes, if the tax payable exceeds $3,000 in the current or previous year. Small CCPCs can pay quarterly instead of monthly, and a new corporation is exempt in its first year.
