Provincial Small Business Tax Rates in Canada: A Complete Comparison for 2025

One of the biggest advantages of incorporating a small business in Canada is the reduced corporate tax rate on the first $500,000 of active business income. This rate comes from the combination of the federal Small Business Deduction (SBD) and each province's own small business rate, and the total varies significantly depending on where your business is located.

This guide breaks down the combined rates for every province and territory, explains how the SBD works, and covers the rules that can reduce or eliminate your access to it.

How the Small Business Deduction Works

The federal corporate tax rate is 38%, but after the federal abatement (10%) and the general rate reduction, the effective federal rate for active business income is 15% for regular corporations.

For Canadian-controlled private corporations (CCPCs), the Small Business Deduction reduces the federal rate on the first $500,000 of active business income to 9%. This is a significant benefit -- the difference between 9% and 15% on $500,000 is $30,000 in tax savings.

Each province and territory then applies its own corporate tax rate on top of the federal rate. Most provinces also offer a reduced small business rate on the same $500,000 of income.

Combined Federal + Provincial Small Business Tax Rates

The following table shows the combined effective tax rate on the first $500,000 of active business income for a CCPC eligible for the full SBD.

Province / Territory	Provincial Small Business Rate	Combined Rate (Federal 9% + Provincial)
Alberta	2.0%	11.0%
British Columbia	2.0%	11.0%
Manitoba	0.0%	9.0%
New Brunswick	2.5%	11.5%
Newfoundland and Labrador	3.0%	12.0%
Northwest Territories	2.0%	11.0%
Nova Scotia	2.5%	11.5%
Nunavut	3.0%	12.0%
Ontario	3.2%	12.2%
Prince Edward Island	1.0%	10.0%
Quebec	3.2%	12.2%
Saskatchewan	1.0%	10.0%
Yukon	0.0%	9.0%

Lowest combined rates: Manitoba (9.0%) and Yukon (9.0%) offer the lowest combined small business tax rates in Canada because their provincial/territorial small business rate is 0%.

Highest combined rates: Ontario and Quebec tie at 12.2%, followed by Newfoundland and Labrador and Nunavut at 12.0%.

Combined General Corporate Tax Rates (Above $500K)

Once your active business income exceeds $500,000, the higher general rate applies to income above that threshold.

Province / Territory	Provincial General Rate	Combined General Rate (Federal 15% + Provincial)
Alberta	8.0%	23.0%
British Columbia	12.0%	27.0%
Manitoba	12.0%	27.0%
New Brunswick	14.0%	29.0%
Newfoundland and Labrador	15.0%	30.0%
Northwest Territories	11.5%	26.5%
Nova Scotia	14.0%	29.0%
Nunavut	12.0%	27.0%
Ontario	11.5%	26.5%
Prince Edward Island	16.0%	31.0%
Quebec	11.5%	26.5%
Saskatchewan	12.0%	27.0%
Yukon	12.0%	27.0%

Note: Alberta has the lowest general corporate rate in Canada at 23.0%, making it an attractive jurisdiction for corporations with income well above the $500,000 threshold.

What "Active Business Income" Means

The SBD only applies to active business income earned in Canada. This distinction is critical because different types of corporate income are taxed at different rates.

Active business income includes:

• Revenue from selling goods or services
• Consulting and professional fees
• Contract income
• Any income from a business you actively operate

What does NOT qualify as active business income:

• Investment income (interest, dividends, capital gains) -- taxed at a much higher rate inside a CCPC (roughly 50% combined)
• Rental income -- may be classified as investment income unless your corporation employs five or more full-time employees in the rental business
• Specified investment business income -- income from a business whose principal purpose is to earn investment income
• Personal services business income -- income from a corporation where the individual would be considered an employee if not for the corporation (taxed at the general rate with no SBD)

The $500,000 Business Limit

The federal business limit is $500,000. Active business income up to this amount qualifies for the 9% federal rate. Income above it is taxed at the general 15% federal rate.

Sharing the Business Limit

If you own multiple corporations that are associated (common ownership or control), they must share the $500,000 limit. You cannot create three corporations and claim $500,000 each. The total limit across all associated corporations is $500,000.

Example: You own 100% of Corporation A and Corporation B. They are associated. You must allocate the $500,000 limit between them -- perhaps $300,000 to A and $200,000 to B, or any split that totals $500,000.

Provincial Business Limits

Most provinces align their business limit with the federal $500,000. However, some provinces have historically had different limits. Always check the current provincial rules for your jurisdiction.

The Passive Income Clawback

Since 2019, the federal government has progressively reduced the business limit for CCPCs that earn significant passive investment income. This is one of the most important rules for incorporated small business owners to understand.

How It Works

If your corporation's adjusted aggregate investment income (AAII) exceeds $50,000 in a tax year, your $500,000 business limit is reduced by $5 for every $1 of AAII above $50,000.

The math:

• At $50,000 of AAII: Full $500,000 business limit
• At $100,000 of AAII: Business limit reduced to $250,000
• At $150,000 of AAII: Business limit reduced to $0 -- you lose the SBD entirely

What Counts as AAII

AAII includes:

• Interest income
• Taxable capital gains (net of allowable capital losses)
• Rental income (in most cases)
• Foreign investment income
• Income from a specified investment business

AAII does not include:

• Dividends from connected Canadian corporations (these are typically deducted)
• Capital gains from the sale of assets used in the active business

Practical Impact

A CCPC with $500,000 of active business income and $150,000 of investment income will pay the general corporate rate (15% federal) on all of its active business income instead of the 9% small business rate. The additional tax cost is $30,000 at the federal level alone, plus the provincial differential.

Strategy: Many tax advisors recommend keeping passive investments outside the corporation (in personal RRSPs or TFSAs) or using strategies to minimize AAII to preserve the SBD. This is a complex area where professional advice is essential.

Sole Proprietorship vs. Corporation: When Do Rates Matter?

The small business tax rate only applies if you are incorporated. Sole proprietors and partners pay personal income tax rates on their business income, which can exceed 50% at the top marginal bracket in most provinces.

However, the comparison is not as simple as "12% is less than 50%." When you eventually take money out of the corporation as salary or dividends, you pay personal tax at that point. The total tax paid (corporate tax plus personal tax on withdrawal) is designed to be roughly similar to what you would pay as a sole proprietor, thanks to the integration principle in Canadian tax law.

The real advantage of incorporation is tax deferral: if you do not need all of your business income for personal expenses, the portion left in the corporation is taxed at only 9-12% instead of your marginal personal rate. That deferred tax can be invested and grown inside the corporation.

When incorporation makes sense for the tax rate advantage:

• Your business consistently earns more than you need for personal living expenses
• You can leave $50,000 or more in the corporation each year
• You want to income-split with family members through dividends (subject to TOSI rules)

When it may not be worth it:

• You withdraw all business income as salary each year
• Your business income is under $50,000
• The administrative costs of maintaining a corporation ($2,000-$5,000/year in accounting fees) outweigh the deferral benefit

Sources

1. CRA: Corporation tax rates
2. CRA: Small business deduction
3. CRA: Business limit reduction -- Passive income
4. CRA: Associated corporations
5. CRA: Guide T4012 -- T2 Corporation Income Tax Guide
6. Income Tax Act, section 125 -- Small Business Deduction