Should You Incorporate Your Business in Canada?

Incorporation is one of the most consequential financial decisions a self-employed Canadian can make. Done at the right time and for the right reasons, it can significantly reduce your overall tax burden. Done prematurely, it adds accounting costs and compliance complexity without meaningful benefit.

Personal vs Corporate Tax Rates (2025)

Tax Type	Rate
Top combined personal marginal rate (Ontario)	~53.53%
Federal small business rate (SBD)	9%
Federal general corporate rate	15%
Ontario corporate rate (SBD)	3.2%
Ontario general corporate rate	11.5%
Combined Ontario small business rate	~12.2%
Combined Ontario general corporate rate	~26.5%

If your personal marginal rate is 46% and the corporate small business rate is 12.2%, a dollar of retained corporate income faces roughly 34 cents less tax immediately. That deferral — reinvesting the excess inside the corporation — is the primary financial argument for incorporation.

The Small Business Deduction (SBD)

Canadian-controlled private corporations (CCPCs) qualify for the Small Business Deduction, which reduces the federal corporate tax rate from 15% to 9% on the first $500,000 of active business income per year. Provinces also offer a reduced rate on this income.

The SBD is shared among associated corporations — if you own multiple corporations, the $500,000 limit is pooled across all of them.

The SBD begins to phase out when a CCPC’s combined taxable capital (in Canada) exceeds $10 million and is eliminated at $50 million. For most small business owners, this is not a constraint.

Tax Integration: Why It Is Not as Simple as It Looks

Canada’s tax system is designed around the concept of integration — the idea that income earned through a corporation and then paid out to a shareholder should face roughly the same total tax as income earned directly by an individual.

In practice, integration is imperfect. The true tax benefit of incorporation depends on:

1. How much income you leave inside the corporation (deferral benefit)
2. How you eventually extract the money (salary vs dividends)
3. Your province of residence (provincial rates vary significantly)

If you immediately pay out all corporate profits as salary, there is almost no tax advantage to incorporation. The benefit arises when you retain earnings inside the corporation, invest them, and only draw what you personally need to live.

Salary vs Dividends: The Two Main Extraction Methods

Salary

• Deductible to the corporation, taxed as employment income to you
• Generates RRSP contribution room
• Creates a CPP obligation (both employer and employee portions)
• T4 is issued; source deductions apply

Eligible vs Non-Eligible Dividends

• Eligible dividends come from income taxed at the general corporate rate (above the SBD limit). They carry a higher dividend tax credit and are taxed more favourably personally.
• Non-eligible dividends (also called “ordinary” dividends) come from income taxed at the small business rate. They have a lower dividend tax credit and attract more personal tax.
• Dividends do not generate RRSP room.
• No CPP is payable on dividends.

Quick Comparison (Ontario, $120,000 total extraction)

Method	Corporate Tax	Personal Tax	CPP	Total Tax	RRSP Room
All salary	$0	~$35,000	~$4,000	~$39,000	$21,600
All non-eligible dividends	~$14,640	~$20,000	$0	~$34,640	$0
Mixed (salary + dividends)	Varies	Varies	Partial	Varies	Partial

Figures are illustrative. Use our Self-Employment Tax Calculator for precise modelling.

The dividend-only approach saves CPP contributions (~$4,000/year in 2025) but eliminates RRSP room. If you value CPP retirement benefits and RRSP room, a blended approach is often optimal.

Financial Reasons to Incorporate

Strong case for incorporation:

• Consistently generating more net business income than you need personally each year
• Net business income above $100,000–$150,000 annually
• Want to retain earnings inside the company to invest (tax deferral strategy)
• Planning to sell the business (lifetime capital gains exemption of $1.25 million available on qualifying shares)
• Multiple shareholders or need liability separation

Weaker case (or not yet):

• Net business income barely covers personal expenses
• Still building the business; revenue is unpredictable
• Administrative cost of incorporation ($1,500–$3,000 to set up, $2,000–$5,000/year in accounting) offsets any tax savings
• You need all the cash personally every year

Non-Tax Reasons to Incorporate

• Limited liability: Corporate structure generally shields personal assets from business creditors (though lenders often require personal guarantees for small businesses).
• Credibility: Some clients and institutions prefer dealing with incorporated entities.
• Succession and ownership transfer: Shares are easier to transfer than a sole proprietorship.
• Bring in co-founders or investors: Easier to allocate ownership through shares.

The Break-Even Point

A common rule of thumb: incorporation becomes financially worthwhile when you are consistently retaining more than $50,000–$75,000 of after-expense business profit inside the company. Below that threshold, the accounting costs often erode the tax savings.

Annual Retained Earnings	Typical Tax Deferral Benefit (Ontario)	Annual Accounting Cost	Net Benefit
$30,000	~$10,200	~$3,000	~$7,200
$60,000	~$20,400	~$3,500	~$16,900
$100,000	~$34,000	~$4,000	~$30,000

Tax deferral benefit assumes 34-cent rate difference (46% personal minus 12.2% corporate small business rate). Actual savings depend on your marginal rate and province.

Passive Income Inside a Corporation

Starting in 2019, corporations earning significant passive investment income inside the corporation face a reduction in their SBD access. For every $1 of passive income above $50,000, the SBD limit drops by $5. At $150,000 of passive income, the corporation loses the SBD entirely.

This “passive income grind” means that very profitable corporations that have accumulated large investment portfolios may see their effective corporate rate rise over time.

Bottom Line

Incorporation is worth pursuing when you have consistent retained earnings, are in a high personal marginal rate bracket, and can absorb the ongoing accounting and compliance costs. Speak with a CPA who specializes in owner-managed businesses before making the decision — the optimal salary/dividend mix and timing are highly individual. Use our Self-Employment Tax Calculator and Dividend Tax Calculator to model scenarios.