When to incorporate in Canada: kept profit pays 11.2%, not 53.53%

What changes for tax the day your client incorporates?

The business becomes a separate taxpayer. Its active business income is taxed at the CCPC rate, federal 9% on the first $500,000 canada.ca plus Ontario's lower rate of 3.2% to June 30, 2026 and 2.2% from July 1 ontario.ca. As a sole proprietor, the same profit lands on your client's T1 at personal rates.

The 53.53% is Ontario's 2026 top combined rate: 33% federal above $258,482 and 13.16% Ontario above $220,000 canada.ca, with the Ontario surtax of 20% of Ontario tax above $5,818 plus 36% above $7,446 canada.ca. Both surtax tiers apply at this income, so 13.16% × 1.56 = 20.53%, plus 33%, gives 53.53%.

The year end row comes from section 249.1: a corporation's fiscal period can't run more than 53 weeks, while an individual's business period ends with the calendar year unless the alternative method election is filed laws-lois.justice.gc.ca. How the 9% is built and the grinds that shrink the $500,000 are on our small business deduction page. The CPP figures are on our CPP maximums page.

Worked example: $100,000 kept in the corporation defers $41,829.60

Your client lives in Ontario, earns enough that the next $100,000 of business profit falls in the top personal bracket, and doesn't need that $100,000 to live on in 2026. Compare earning it as a sole proprietor with earning it in a CCPC with a calendar year end that keeps it.

For a calendar 2026 year, the CRA has you weight a rate that changes during the year by the days it was in effect canada.ca. Ontario's 3.2% for 181 days and 2.2% for 184 days averages about 2.70%, so the combined small business rate is about 11.70%.

Keeping the profit inside defers $41,829.60 of tax ($53,529.60 minus $11,700.00) for as long as the money stays in the corporation. For a tax year that starts on or after July 1, 2026, the Ontario corporate rate is 11.2% throughout, and at 2026 personal rates the gap is 42.33 points, or $42,329.60 per $100,000.

The payout column uses the 15% gross up on a non eligible dividend laws-lois.justice.gc.ca, a federal dividend tax credit of 9/13 of the gross up laws-lois.justice.gc.ca, and Ontario's credit of 2.9863% of the grossed up dividend for 2020 to 2026 ontario.ca. Paid out at the top bracket, the money costs $324.97 more in total tax than if your client had earned it personally. The line by line math is on our salary vs dividends page.

When does incorporating not pay off?

When your client spends all the profit. The deferral exists only on profit left in the corporation. If every dollar comes out each year as salary or dividends, total tax lands close to the sole proprietor figure, and the corporation adds a T2, separate books and its own bank account on top. The table above shows the top bracket, where the gap is widest. At lower personal brackets the gap shrinks, and so does the reason to incorporate.

Three rules can erase the benefit outright:

Status matters too. The 11.2% and 12.2% rates need the corporation to be a CCPC for the whole year, which is covered on our CCPC definition page. Clients who plan to invest the deferred profit often add a holding company later.

How does the business move into the corporation without triggering tax?

With a section 85 rollover for income tax and a section 167 election for GST/HST. Without them, your client is treated as selling each asset at fair market value, and the corporation pays GST/HST on the purchase. Our section 85 rollover page works through a full sole proprietorship transfer, with the elected amounts, the T2057 deadline and the PUC grind.

For GST/HST, section 167 of the Excise Tax Act lets the seller and the buyer jointly elect that no tax is payable when the buyer acquires all or substantially all of the property needed to carry on the business laws-lois.justice.gc.ca. The election is made on Form GST44 canada.ca. Two traps: the election isn't available when the seller is a registrant and the buyer isn't, so register the corporation first; and a registrant buyer files the election by the due date of its return for the first reporting period in which tax would otherwise have become payable laws-lois.justice.gc.ca.

The sole proprietorship's accounts don't carry over. The CRA tells a sole proprietor who stops operating to close all program accounts, and a new owner needs a new BN and new program accounts canada.ca. The steps for the corporation's BN are on our business number registration page.

Why early losses argue for waiting

A sole proprietor's business loss reduces your client's other income in the same year, because paragraph 3(d) subtracts the taxpayer's loss from a business when computing income laws-lois.justice.gc.ca. A startup loss of $40,000 against $90,000 of employment income leaves your client taxed on $50,000 that year.

Inside a corporation, the same $40,000 is the corporation's non capital loss. Paragraph 111(1)(a) lets a taxpayer deduct its own non capital losses laws-lois.justice.gc.ca, so the loss waits for the corporation to earn income, carried back 3 years or forward 20 canada.ca. A new corporation has no prior years to carry back to, and your client's salary or other income can't absorb it.

The same rule works in the other direction. An unused non capital loss from your client's years as a sole proprietor stays on your client's T1 and doesn't move to the corporation with the business. That's why many advisers leave a business unincorporated until it turns a steady profit. The carryover rules are on our non capital loss carryover page.

What does the first corporate year cost and change?

Federal incorporation costs $200 online at Corporations Canada ised-isde.canada.ca. Provincial incorporation fees differ. After that, the corporation must file a T2 every tax year even when no tax is payable canada.ca, within six months of its year end canada.ca. Its balance is due two months after year end, or three months for a CCPC that claimed the small business deduction and stayed within its business limit the year before canada.ca.

A short first year shrinks the limit. For a tax year under 51 weeks, subsection 125(5) prorates the $500,000 by the days in the year over 365 laws-lois.justice.gc.ca. Incorporate on July 1, 2026 with a December 31 year end, and the first year has 184 days: $500,000 × 184 ÷ 365 = $252,055 of income at the small business rate.

In the year of incorporation, your client's T1 still reports the sole proprietorship's profit from January 1 to the transfer date. Profit after that date belongs to the corporation. Salary or dividends your client draws from the corporation in that first year go on the T1 too.