Understanding Alberta's Small Business Tax Rate

Alberta is one of the most tax-friendly provinces in Canada for small businesses. Understanding how the tax system works can help you structure your Calgary business to minimise your tax burden legally and effectively.

The Federal Small Business Deduction

Canadian-controlled private corporations (CCPCs) benefit from the federal small business deduction, which reduces the federal corporate tax rate to 9% on the first $500,000 of active business income. This preferential rate is a significant advantage of incorporating.

Alberta's Provincial Rate

Alberta's small business tax rate is 2% on the first $500,000 of active business income. Combined with the federal rate of 9%, this gives an effective combined rate of just 11% — one of the lowest in Canada. By comparison, Ontario's combined rate is 12.2% and British Columbia's is 11%.

Above the Small Business Limit

Income above $500,000 is taxed at the general corporate rate: 15% federally plus 8% provincially, for a combined rate of 23%. This is still competitive nationally and significantly lower than personal tax rates at equivalent income levels.

No Provincial Sales Tax

Alberta has no provincial sales tax (PST), which means businesses only collect the 5% federal GST. This is a meaningful advantage for consumer-facing businesses compared to provinces with HST rates of 13-15%.

Sole Proprietor vs Corporation

As a sole proprietor, your business income is taxed at your personal marginal rate, which can reach over 48% at higher income levels in Alberta. Incorporating allows you to leave money in the corporation at the 11% small business rate and control when you draw it out as salary or dividends.

When Does Incorporation Make Sense?

Generally, incorporation becomes advantageous when your business income consistently exceeds your personal spending needs — meaning you can leave surplus income in the corporation at the lower tax rate. A rough threshold is when your business earns more than $80,000–$100,000 annually, but the right answer depends on your specific situation.

Get Personalised Advice

Tax planning is complex and depends on your individual circumstances. Castle Bookkeeping works alongside your accountant to ensure your books support optimal tax planning. We can also refer you to trusted Calgary accountants who specialise in small business tax strategy.