Canada Small Business Tax 2026: the 9% SBD Rate, Provincial Rates and Incorporation
The single most valuable tax break for a Canadian small business is the small business deduction (SBD): it cuts the federal corporate rate from 15% to 9% on the first $500,000 of active business income. Add the provincial piece and a Canadian-controlled private corporation (CCPC) can pay as little as 9% combined. This guide covers the 2026 rates β including Ontario's mid-year cut β the $500,000 business limit and its traps, and the eternal question: sole proprietorship or corporation?
The small business deduction: 9% federal
A CCPC pays federal tax at 9% instead of 15% on eligible active business income, up to the $500,000 federal business limit per year. Above the limit β or on income that is not active business income β the general federal rate of 15% applies. The deduction lives in section 125 of the Income Tax Act and requires, among other things, that the corporation be Canadian-controlled and private throughout the year.
The $500,000 limit is not per company in the way owners hope:
- Associated corporations share one limit. If you control two companies, the group gets $500,000 total, not $500,000 each.
- Passive income grind: adjusted aggregate investment income (AAII) above $50,000 shrinks the limit by $5 for every $1 of excess β at $150,000 of AAII the SBD is gone entirely for the year.
- Big-company phase-out: taxable capital between $10 million and $50 million phases the limit out; at $50 million+ there is no SBD.
Provincial rates 2026: 9% to 12.2% combined
Each province adds its own small-business rate on top of the federal 9%. The combined 2026 picture:
| Province/Territory | Provincial SB rate | Combined SB rate | Business limit | Notes |
|---|---|---|---|---|
| Alberta | 2% | 11% | $500,000 | |
| British Columbia | 2% | 11% | $500,000 | |
| Manitoba | 0% | 9% | $500,000 | Lowest in Canada |
| New Brunswick | 2.5% | 11.5% | $500,000 | |
| Newfoundland and Labrador | 2% | 11% | $500,000 | |
| Nova Scotia | 1.5% | 10.5% | $700,000 | Limit raised Apr 1, 2025 |
| Ontario | 3.2% β 2.2% | 12.2% β 11.2% | $500,000 | Cut effective Jul 1, 2026, prorated |
| Prince Edward Island | 1% | 10% | $600,000 | Limit raised Jul 1, 2025 |
| Quebec | 3.2% | 12.2% | $500,000 | Hours-based eligibility rules |
| Saskatchewan | 1% | 10% | $600,000 | |
| Northwest Territories | 2% | 11% | $500,000 | |
| Nunavut | 3% | 12% | $500,000 | |
| Yukon | 0% | 9% | $500,000 | Lowest in Canada |
Ontario deserves a callout: the 2026 provincial budget cut the small-business rate from 3.2% to 2.2% effective 1 July 2026 (prorated for tax years straddling the date). For a calendar-year filer, the combined 2026 rate works out to about 11.7%, falling to 11.2% for 2027. Three provinces run higher provincial limits than the federal $500,000 β Nova Scotia ($700,000), PEI and Saskatchewan ($600,000) β but the federal limit stays at $500,000 regardless.
Sole proprietorship vs corporation
| Sole proprietorship | Corporation (CCPC) | |
|---|---|---|
| Taxation | Business income taxed personally at your marginal rate (up to ~50%+) | 9β12.2% on first $500K retained; personal tax when you pay yourself |
| Setup cost | Near zero (business name registration) | ~$300β2,000+ incorporation, plus annual filings |
| Liability | Unlimited personal liability | Limited liability (with exceptions) |
| Admin | Minimal | Annual returns, minute book, separate tax return (T2) |
| Best for | Testing an idea, low income, service freelancers | Profits you can leave in the company, liability exposure, growth |
The classic rule of thumb: incorporate when you consistently earn more than you need to live on, because retained profits compound at 9β12% instead of your ~40β50% personal marginal rate. But incorporation also means paying yourself properly β salary triggers CPP/EI and payroll remittance; dividends avoid CPP but come with their own integration math. Get advice before flipping a mature sole proprietorship into a corporation (a section 85 rollover usually does it tax-free).
GST/HST and payroll: the other two filings
- GST/HST: register once taxable sales exceed $30,000 in four consecutive quarters (the small-supplier threshold). Many businesses register voluntarily earlier to claim input tax credits on startup costs. Rates: 5% GST in non-HST provinces, 13% HST in Ontario, 15% in the Atlantic provinces.
- Payroll: paying yourself or staff salary means registering a payroll account (RP), withholding income tax, and remitting CPP/QPP and EI premiums. Employers also pay 1.4Γ the employee's EI premium. Payroll remittance is monthly (or faster for larger payrolls) β the CRA penalises late remittance harshly, so calendar it.
Worked example: $120,000 profit in Ontario (2026)
A CCPC with $120,000 of active business income, calendar 2026:
- Federal: 120,000 Γ 9% = $10,800
- Ontario (blended ~2.7% for 2026): 120,000 Γ 2.7% β $3,240
- Combined corporate tax β $14,040 (11.7%), leaving ~$105,960 to reinvest or pay out
The same $120,000 earned as a sole proprietor in Ontario would face personal marginal rates up to 43.41% β the incorporation advantage is real, but only on money you do not need to withdraw.
Next steps
- Confirm CCPC status and the business limit before year-end β associated companies and passive income can quietly shrink your $500,000.
- Ontario owners: model the mid-year rate cut into 2026 instalments; calendar-year filers land at ~11.7% combined.
- Register for GST/HST before you cross $30,000 in sales β back-dated registration is painful.
- Decide salary vs dividends with an accountant once profits are steady; the wrong mix costs thousands a year.
- Diary the T2 deadline: six months after year-end (payment due two or three months after, depending on SBD eligibility).