Corporate Income Tax - Overview

Corporate Income Tax Announcements

Items are removed from this list after six months. Documents are also included in Corporate Income Tax Publications or Forms. See other Corporate Income Tax related links to your right.

November 15, 2018 - New Corporate Tax Special Notice

August 22, 2018 - New Corporate Tax Video added

July 11, 2018 - New Corporate Tax Special Notice

June 18, 2018 - Updated Corporate Tax Information Circular

Corporate Income Tax Overview

Corporations operating in Alberta are required to file Alberta corporate tax returns in addition to filing with Canada Revenue Agency (CRA).

Tax and Revenue Administration (TRA), Alberta Treasury Board and Finance, administers the Alberta Corporate Tax Act, that provides for the calculation of:

  • Alberta corporate income tax for corporations with a permanent establishment in Alberta, including Alberta deductions and credits such as the Alberta small business deduction, Alberta foreign investment income tax credit, Alberta political contributions tax credit and scientific research and experimental development (SR&ED) tax credit (see below); and

  • Insurance premiums tax payable by insurers carrying on the business of insurance in Alberta (see below).


Corporate income tax has been levied by the province since the 1940s. All incorporated businesses with a permanent establishment (e.g., office, mine, farm, oil well, etc.) in Alberta at any time in a taxation year pay income tax on the portion of their taxable income allocated to Alberta.

The Alberta calculation of taxable income parallels the federal calculation, although taxpayers may claim different discretionary deductions such as capital cost allowances for federal and provincial purposes. The allocation of income among provinces is generally standardized across the country.

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Small Business Deduction

Canadian-controlled private corporations not in an associated group may claim a small business deduction on active business income (i.e., non-investment income) up to the small business threshold of $500,000. Canadian-controlled private corporations in an associated group share the maximum small business threshold. For more information about the small business deduction, see information circular CT-17, Alberta Small Business Deduction. Please also see Special Notice Vol. 5 No. 45, Alberta Small Business Tax Rate Reduction, and FAQs.

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Insurance Premiums Tax

The insurance premiums tax is payable by insurance companies for premiums receivable on contracts of life, accident, sickness and all other contracts of insurance transacted in Alberta during the year. 

The insurance premiums tax return (AT2095) and remittance must be received by Tax and Revenue Administration (TRA) on or before the 75 day following the taxation year-end.  Insurers will be charged a late filing penalty if they file their AT2095 late. Interest on late remittances will also apply.

The AT2095 can be submitted to TRA electronically using the online Tax and Revenue Administration Client Self-service (TRACS) filing system, by fax, or by mail.

Along with the return, you may be requested to provide a copy of one of the following documents from the fourth quarter return submitted to the Superintendent of Insurance:

  • Property and Casualty pages 67.10 and 93.30
  • Life pages 95.010 and 95.020

For more information, see Information Circular CT-21 – Insurance Premiums Tax and Special Notice Vol. 5 No. 37 – Alberta Corporate Tax Amendment Act, 2012.

Special Notice Vol. 5 No. 43 – Insurance Premiums Tax Increase outlines the last insurance premiums tax rate increase, effective April 1, 2016. 

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Alberta Scientific Research and Experimental Development (SR&ED) Tax Credit

Alberta's scientific research and experimental development tax credit program provides a refundable tax credit to corporations for SR&ED expenditures incurred in Alberta by the corporations.

For more information, see Information Circular SRED-1, and the SR&ED Guide and related forms.

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Current and Historical Alberta Corporate Tax Rates and Small Business Deduction

See Alberta Corporate Tax Rates and Small Business Deduction (from January 2000 to current).

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Page last updated:  November 15, 2018