If you own an incorporated business in Alberta, knowing your corporate tax rate can help you plan for upcoming tax payments.
In 2026, Alberta corporations generally pay a combined federal and provincial tax rate of 11% or 23% on active business income, depending on their size, income, and eligibility for tax deductions.
However, not every company pays the same rate. The type of income your business earns and how your corporation is structured can also affect its taxes.
This guide explains Alberta's corporate tax rates, how they work, and what they could mean for your business.
Corporations in Alberta generally pay both federal and provincial income tax.
Federal corporate taxes are handled by the Canada Revenue Agency (CRA) through the T2 return. Alberta's provincial taxes are handled by Tax and Revenue Administration (TRA) through a separate AT1 return.
Your company may also need to make separate federal and provincial tax payments.
For 2026, the main corporate income tax rates in Alberta are:
These rates apply to taxable income, not your company's total sales or revenue.
For example, if your company earns $1 million in revenue but has $700,000 in deductible expenses, its taxable income may be around $300,000, assuming no other tax adjustments.
The tax rate applies to your company's taxable income, not the full $1 million in sales.
Many Alberta corporations can qualify for a lower tax rate through the Small Business Deduction (SBD).
This deduction is generally available to eligible Canadian-controlled private corporations (CCPCs).
A CCPC is usually a private corporation based in Canada that meets certain ownership and control rules.
For qualifying corporations, the lower 11% combined tax rate can apply to up to $500,000 of eligible active business income each year.
Active business income generally means money your company earns from its regular business operations, such as providing services or selling products.
However, not every corporation qualifies for the full $500,000 limit.
If your corporation qualifies for the full Small Business Deduction, income above the $500,000 business limit is generally taxed at the higher corporate rate.
Example:
Imagine your Calgary company earns $700,000 in taxable income from its regular business operations.
Assuming the full Small Business Deduction is available, your estimated corporate tax would be:
Total estimated corporate income tax: $101,000
This is a simplified example. Your actual tax bill may differ based on available deductions, tax credits, income type, and other rules.
It also assumes all income is allocated to Alberta and the company qualifies for the full federal and provincial small business limits.
Even if your company earns less than $500,000 in taxable income, it may not qualify for the full Small Business Deduction.
Several factors can affect how much of your income receives the lower rate.
If your corporation earns income from investments, such as interest or certain rental income, different tax rules may apply.
Under federal rules, certain investment income above $50,000 can begin reducing your company's Small Business Deduction limit.
This is generally based on investment income earned in the previous tax year by your corporation and any associated corporations.
Investment income itself may also be taxed differently from regular business income.
For more details, read our guide to how passive income can affect the Small Business Deduction.
If you own or control multiple corporations, the CRA may consider them associated corporations.
Associated corporations generally have to share the federal $500,000 business limit instead of each receiving a separate limit.
Alberta also has rules for sharing its provincial small business limit.
For example, owning two related corporations doesn't automatically mean you can claim the full lower tax rate on $500,000 of income in each company.
Larger corporations may have a reduced federal Small Business Deduction.
Under current federal rules, the business limit begins to decrease when a corporation and its associated group have more than $10 million in taxable capital employed in Canada.
The federal business limit is fully reduced at $50 million.
Taxable capital is a tax measure based on certain amounts of capital used by a business. It is not the same as annual sales or profit.
Alberta has its own rules, so your federal and provincial small business limits may differ.
No. Your corporation generally pays income tax on its taxable income, not its total revenue.
Taxable income is calculated using your company's income, eligible deductions, and other adjustments required under Canadian tax rules.
For example, your corporation may be able to deduct reasonable business expenses such as employee wages, rent, insurance, software, and professional fees.
Some purchases, such as equipment or vehicles, follow different rules and may need to be deducted over time.
Keeping accurate financial records helps ensure your company reports its income and expenses correctly.
Our article on overlooked business tax deductions in Alberta explains several expenses worth reviewing.
Knowing your tax rate is useful, but estimating how much tax your company will owe is just as important.
For example, if your business earns more profit than expected, your tax payments may also increase.
Reviewing your company's financial reports throughout the year can help you understand its taxable income and plan for upcoming payments.
You should also consider whether your corporation needs to make tax instalments during the year.
Some companies must make regular payments toward their expected corporate tax bill rather than waiting until they file their returns.
For more information about filing and payment deadlines, read our guide to corporate tax filing in Alberta.
If your company's year-end is approaching, our corporate year-end tax planning guide also explains what to review before your financial year closes.
Not always. The 11% rate generally applies to eligible active business income within your available Small Business Deduction limit. Income above that limit is generally taxed at the 23% rate.
Generally, no. Investment income follows different tax rules. For example, taxable interest earned by an Alberta CCPC is generally subject to an initial 46.67% combined tax rate in 2026, although part of this tax may be refundable.
Not necessarily. If the corporations are considered associated under tax rules, they generally must share the available business limit rather than each claiming the full amount.
Understanding your corporate tax rate can help you plan ahead, manage cash flow, and avoid unexpected tax bills.
While many Alberta corporations qualify for the 11% small business rate, others may pay the general 23% rate or face different rules based on their income and corporate structure.
Jensen CPA provides corporate tax services in Calgary, including T2 corporate tax preparation, year-end financial statements, and tax planning for incorporated businesses.
If you need help understanding your company's tax obligations or preparing for your next corporate year-end, contact our team to discuss your accounting needs.
Canada Revenue Agency: Corporation Tax Rates
Explains federal corporate income tax rates, including the 9% small business rate and 15% general corporate rate.
Government of Alberta: Tax, Levy, and Prescribed Interest Rates
Lists Alberta's current corporate income tax rates, including the 2% small business rate, 8% general rate, and $500,000 provincial business limit.
Government of Alberta: Corporate Income Tax
Explains Alberta corporate income tax requirements, the provincial Small Business Deduction, and rules for corporations operating in Alberta.
Canada Revenue Agency: T2 Corporation Income Tax Guide — Small Business Deduction
Explains which corporations may qualify for the Small Business Deduction, how the business limit works, and how investment income, taxable capital, and associated corporations can affect eligibility.
Author: Written by the Jensen CPA Editorial Team, reviewed & approved by Managing Partner Kevin Jensen.
Disclaimer: The information provided in this article is for general informational and educational purposes only and does not constitute professional accounting, tax, financial, investment, or legal advice. Reading this article does not create an accountant-client relationship with Jensen CPA. Canadian and Alberta tax laws are complex and subject to change. Always consult a qualified CPA or other appropriate professional regarding your specific business or financial situation. Read our full Terms of Use.
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