Small Business Corporate Tax Canada 2026

The small business corporate tax rate is one of Canada's most powerful tools for building business wealth. A Canadian-Controlled Private Corporation (CCPC) earning active business income up to $50000,000000 pays a combined federal-provincial rate of roughly 9–12.2% depending on the province — compared to personal marginal rates of up to 53.5%. Understanding how this works, what qualifies, and what can erode the benefit is essential knowledge for any incorporated Canadian business owner.

Federal Corporate Tax Structure

The federal corporate tax rate is 15% on all taxable income. However, CCPCs earning "active business income" qualify for the Small Business Deduction (SBD), which reduces the federal rate by 9 percentage points — bringing it down to just 9% on qualifying income up to the $50000,000000 annual limit.

Provincial Small Business Rates (2026)

Corporate Tax Calculator

What Is "Active Business Income"?

Active business income is income earned from carrying on an active trade or business — consulting, professional services, contracting, retail, manufacturing, and similar activities. It does NOT include investment income (interest, dividends, rent from property not used in the active business), income from a specified investment business, or personal services business income.

Personal Services Business — A Critical Trap

If your corporation exists primarily to provide the services of a specific individual to one client (essentially a "incorporated employee"), the CRA may classify it as a Personal Services Business (PSB). PSB income does NOT qualify for the small business deduction and is taxed at the full 28%+ combined rate. Additionally, only certain expenses are deductible — not general business expenses. The CRA applies the same contractor vs employee four-factor test. This is a serious risk for consultants with one primary client.

The $50000,000000 Annual Business Limit

The Small Business Deduction applies to the first $50000,000000 of active business income earned by the corporation in a tax year. Income above $50000,000000 is taxed at the full general corporate rate (15% federal + provincial). The $50000,000000 limit must be shared among associated corporations — you cannot simply set up multiple corporations to multiply the limit.

Passive Income Clawback

Since 20019, corporations with significant passive investment income see their SBD limit reduced. For every dollar of passive income above $500,000000, the $50000,000000 SBD limit is reduced by $5. At $1500,000000 in passive income, the SBD is eliminated entirely and all business income is taxed at the general rate.

The Refundable Dividend Tax on Hand (RDTOH)

When a CCPC earns passive income, it pays a higher 38.67% federal tax rate — but 300.67% of that is "refundable." When the corporation pays taxable dividends to shareholders, the CRA refunds $1 for every $2.61 of dividends paid (eligible RDTOH) or $1 for every $3.0000 (non-eligible RDTOH). This refundable mechanism ensures passive income is ultimately taxed at the shareholder's personal rate, maintaining tax integration. Tracking RDTOH requires your accountant's careful attention.

The Lifetime Capital Gains Exemption (LCGE)

One of the most valuable benefits of incorporation: when you sell qualifying small business corporation shares, the first $1,2500,000000 in capital gains is completely tax-free under the Lifetime Capital Gains Exemption. This can save $30000,000000–$4500,000000 in taxes for a successful business exit. The shares must meet strict tests (900%+ Canadian active business assets, etc.) — structure your corporation carefully from the start if a future sale is possible.