The Small Business Deduction (SBD) is one of the most powerful tax advantages available to Canadian entrepreneurs. It reduces the federal corporate tax rate from 15% to just 9% on the first $500,000 of active business income — a saving of up to $30,000 per year at the federal level alone.
What Is the Small Business Deduction?
The Small Business Deduction is a federal tax reduction for Canadian Controlled Private Corporations (CCPCs). Instead of paying the standard 15% federal corporate tax rate, qualifying CCPCs pay only 9% on their first $500,000 of active business income each year.
Combined with provincial small business rates, the total tax rate for most small businesses is between 9% and 15.5% — compared to 23%–29% for general corporations.
✅ Example: An Ontario CCPC earning $400,000 in active business income pays 12.2% combined tax (~$48,800) instead of 26.5% (~$106,000). That's a saving of over $57,000 per year.
Who Qualifies for the Small Business Deduction?
To qualify, your corporation must be a Canadian Controlled Private Corporation (CCPC) that meets all of the following:
- Incorporated in Canada
- Not publicly traded on a stock exchange
- Majority of shares owned by Canadian residents
- Earns active business income (not investment income)
- Active business income under $500,000 per year
⚠️ Active vs Passive Income: Only active business income qualifies. Investment income (interest, dividends, rental income from a holding company) is taxed at a much higher rate of up to 50.17% in some provinces.
The $500,000 Business Limit
The Small Business Deduction applies to the first $500,000 of active business income annually. Income above $500,000 is taxed at the general corporate rate.
The $500,000 limit is shared across associated corporations — if you own multiple corporations, their income is combined when determining whether the limit has been reached.
How Much Can You Save? (2026 Rates)
| Province | Small Business Rate | General Rate | Saving on $500,000 |
|---|---|---|---|
| Ontario | 12.2% | 26.5% | $71,500 |
| British Columbia | 11% | 27% | $80,000 |
| Alberta | 11% | 23% | $60,000 |
| Quebec | 12.2% | 26.5% | $71,500 |
| Saskatchewan | 9% | 27% | $90,000 |
| Manitoba | 9% | 27% | $90,000 |
The Taxable Capital Phaseout
If your corporation (and associated corporations) have taxable capital exceeding $10 million, the $500,000 small business limit begins to phase out. It is completely eliminated once taxable capital reaches $15 million.
This affects large businesses — most small business owners are nowhere near this threshold.
The Passive Income Phaseout (SBD Grind)
Since 2019, the Small Business Deduction limit is also reduced if your corporation earns too much passive investment income. For every $1 of passive income above $50,000 per year, the business limit is reduced by $5.
- $50,000 passive income → full $500,000 SBD limit
- $75,000 passive income → $500,000 limit reduced to $375,000
- $150,000 passive income → SBD limit eliminated entirely
⚠️ Planning tip: If your corporation is accumulating significant investment income, consult a tax professional. Holding companies and other structures may help preserve your SBD eligibility.
How to Claim the Small Business Deduction
The SBD is claimed on your corporation's annual T2 Corporate Tax Return. Your accountant or tax software will calculate it automatically based on your active business income and eligible amount.
- File your T2 within 6 months of your fiscal year-end
- Pay corporate tax installments quarterly throughout the year
- Keep clear records distinguishing active and passive income
Strategies to Maximize the Small Business Deduction
- Pay yourself a salary — reduces active business income, which may help if you're near the $500,000 limit
- Separate passive investments — consider a holding company to keep passive income separate from operating income
- Control passive income — stay under $50,000 passive income annually to avoid the SBD grind
- Plan fiscal year-end — timing income and expenses around your year-end can affect how much falls within the $500,000 limit
- Associated corporations — be aware that related corporations share the $500,000 limit
✅ Pro tip: The Small Business Deduction is one of the main reasons Canadians incorporate. Even at a modest $200,000 in annual business income, you could save over $28,000 in tax compared to earning that same income personally.
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