Sole Proprietorship or Corporation? A Canadian Tax Guide
sole proprietorship versus corporation from a Canadian tax lens
Incorporating in Canada moves business income from an individual's personal rates to corporate rates — 9% federally on the first $500,000 of active business income for a CCPC claiming the small business deduction, plus a provincial rate. The benefit is deferral on income left in the company; the cost is a second return, a second set of books and ongoing filings.
What does incorporating actually change?
Tax on business income moves from personal graduated rates to corporate rates, and the owner is then taxed again on salary or dividends taken out. Where the owner needs all the income personally, incorporation offers little tax benefit; where income can stay in the company, it offers deferral.
The compliance the client is buying
A corporation files a T2 every year, even with no income. It needs its own books, its own bank account, GIFI financial statements filed with the return, T4s or T5s for amounts paid to the owner, and — in Quebec and Alberta — a second provincial corporate return.
| Filing | Applies to | Filing deadline | Payment | If it is late |
|---|---|---|---|---|
| T2 corporation income tax return | Every resident corporation, every tax year, even with no tax payable. | File within six months after the end of the corporation's tax year. Where the year-end is the last day of a month, the return is due the last day of the sixth following month; otherwise it is due the same day of the sixth month. | The balance of tax is due earlier than the return: generally two months after year-end, or three months for eligible Canadian-controlled private corporations claiming the small business deduction. Filing on time is not paying on time. | 5% of the unpaid tax plus 1% per complete month late, to a maximum of 12 months. Repeated failure raises it to 10% plus 2% per month for up to 20 months. |
| Fiscal year-end conventions | All businesses. | A corporation chooses its fiscal year-end on its first T2. Any date may be chosen and the fiscal period may not exceed 53 weeks; changing the year-end afterwards requires CRA approval. Unincorporated businesses generally must use a December 31 year-end unless they elect the alternative method. | Financial statements accompany the T2 as GIFI schedules and are due with the return, six months after year-end. | No penalty applies |
Choosing a year-end deliberately
A corporation picks any fiscal year-end on its first T2, provided the period does not exceed 53 weeks, and needs CRA approval to change it later. Choosing a non-December year-end can spread the firm's own workload and shift the owner's personal income planning window.
The non-tax reasons
Limited liability, continuity, easier ownership transfer and, for some clients, contractual requirements. These are frequently the real driver, and framing incorporation as purely a tax decision leads clients to the wrong conclusion.
Frequently asked questions
At what income should a business incorporate?
There is no universal threshold. The benefit depends on how much income the owner can leave in the corporation, since incorporation offers deferral rather than outright savings on income taken personally. Where the owner draws everything out, the compliance cost usually outweighs the tax effect.
Does a corporation always pay 9% tax?
No. The 9% federal rate applies to active business income up to the $500,000 business limit for a Canadian-controlled private corporation claiming the small business deduction. Provincial tax is added on top, the limit is shared among associated corporations, and significant passive income or taxable capital can reduce access to it.
What extra filings does a corporation have?
An annual T2 return with GIFI financial statements, due six months after year-end, with tax payable earlier. Add payroll accounts and T4s or T5s for owner compensation, and — for corporations in Quebec or Alberta — a separate provincial corporate return.
Can I choose any fiscal year-end?
A corporation chooses its year-end on its first T2 and may pick any date, provided the fiscal period does not exceed 53 weeks. Changing it later requires CRA approval, so it is worth choosing deliberately rather than defaulting to December 31.
Related guides
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