Alberta corporations pay one of the lowest corporate tax burdens in Canada: a combined 11% on the first $500,000 of active business income and roughly 23% on general income above that, in the 2026 tax year. The province charges no PST and no provincial payroll or health tax, but corporations must file a standalone Alberta AT1 return with Tax and Revenue Administration on top of the federal T2. This guide explains every rate, the small-business deduction, the AT1 obligation, and what the absence of a provincial sales tax means for your filing stack.
Alberta corporate tax rates for 2026
Alberta sets two provincial corporate rates, which stack on top of the federal rates. As of the 2026 tax year, the provincial rates are 2% on small-business income and 8% on general income. Alberta's 8% general rate is the lowest general corporate rate of any Canadian province.
The figures that actually hit your return are the combined federal-plus-provincial rates:
| Income type (2026 tax year) | Federal rate | Alberta rate | Combined rate |
|---|---|---|---|
| Active business income up to $500,000 (CCPC, SBD) | 9% | 2% | 11% |
| General active business income over $500,000 | 15% | 8% | 23% |
| Investment income (CCPC, before refundable portion) | 38.67% | 8% | ~46.67% |
The small-business combined rate of 11% applies only to a Canadian-controlled private corporation (CCPC) that qualifies for the small-business deduction. A corporation that is not a CCPC — for example, one controlled by non-residents or a public company — pays the general 23% combined rate on all of its active business income.
The small-business deduction (SBD)
The small-business deduction lowers the federal rate from 15% to 9% on the first $500,000 of active business income. Alberta mirrors the $500,000 business limit, so the same income band gets the 2% provincial rate. Two grind-down rules can reduce that limit:
- The associated-corporation grind. The $500,000 limit is shared among all associated corporations. If you control two operating companies, they split one limit, not two.
- The passive-income grind. Where a CCPC and its associated group earn more than $50,000 of adjusted aggregate investment income in the prior tax year, the business limit is reduced, disappearing entirely once passive income reaches $150,000.
Crossing the $500,000 line is one of the most common moments owner-managers ask whether to leave profit in the company or pay it out — a question we cover in our salary vs dividends guide.
No PST: what it removes from your filing stack
Alberta is the only province with no provincial sales tax. A corporation that operates solely in Alberta charges and remits only the 5% federal GST (once it crosses the $30,000 registration threshold). There is no parallel provincial sales-tax account to register, collect, file or reconcile.
This matters beyond the headline rate. In British Columbia a business must run GST and 7% PST as two separate systems with different rules on what is taxable; in Ontario the two are merged into a single 13% HST. Alberta's single-tax environment means fewer accounts, fewer returns and fewer reconciliation errors. If you sell into BC or Ontario, though, you may still need to register for those provinces' taxes on sales made there — the Alberta advantage covers your home-province obligations, not your out-of-province ones.
No provincial payroll or health tax
Alberta also has no provincial payroll tax and no employer health tax. An Alberta employer's statutory payroll cost is limited to the federal programs:
- CPP at 5.95% on pensionable earnings between the $3,500 basic exemption and the $74,600 Year's Maximum Pensionable Earnings (YMPE).
- CPP2 at 4% on earnings between $74,600 and the $85,000 second ceiling (YAMPE).
- EI at the employer rate of 1.4× the employee premium, on insurable earnings up to $68,900.
By contrast, a British Columbia employer with payroll above $1 million also pays the Employer Health Tax. The absence of that tax is a structural cost advantage for Alberta employers, especially as headcount grows.
The Alberta AT1: filing separately from the federal T2
Alberta is one of only two provinces (with Quebec) that does not let the CRA collect its corporate tax. As a result, a corporation with a permanent establishment in Alberta generally files two corporate returns:
- The federal T2 with the Canada Revenue Agency, and
- The Alberta AT1 with Tax and Revenue Administration (TRA).
Who must file an AT1
A corporation must file an AT1 for any tax year in which it had a permanent establishment in Alberta, with a narrow exemption available to some corporations that were federal-only filers with no Alberta tax payable, no Alberta credits and gross revenue under the prescribed threshold. When in doubt, file.
AT1 deadlines
| Obligation | Typical deadline (after fiscal year-end) |
|---|---|
| File the AT1 return | Within 6 months |
| Pay Alberta tax owing — CCPC eligible for SBD | Within 3 months |
| Pay Alberta tax owing — other corporations | Within 2 months |
| Instalments (if required) | Monthly, during the year |
The payment deadline falls before the filing deadline, which trips up many first-time filers: you can owe Alberta tax months before the AT1 itself is due. Larger corporations also pay Alberta tax by monthly instalments, calculated on the prior year's liability.
AT1 schedules and credits
The AT1 carries its own schedules, including the Alberta loss carry-back/forward and provincial credits such as the Innovation Employment Grant (IEG) and the Agri-processing Investment Tax Credit. Because the AT1 starts from federal taxable income but then applies Alberta-specific adjustments, the two returns must be prepared together so the numbers reconcile.
A simple worked example
Consider an Alberta CCPC with $650,000 of active business income in the 2026 tax year, no associated companies and no passive-income grind:
- First $500,000 at the 11% combined small-business rate = $55,000
- Remaining $150,000 at the 23% combined general rate = $34,500
- Total corporate tax ≈ $89,500
The same company in British Columbia would owe the same 11% on the first $500,000 (BC's small-business combined rate is also 11%) but 27% on the excess — about $40,500 on the top band — plus potential Employer Health Tax on its payroll. The Alberta structure is meaningfully cheaper once a company outgrows the small-business limit.
How RN Canada helps
RN Canada is an Edmonton-headquartered accounting and advisory firm that prepares both the federal T2 and the Alberta AT1 for owner-managed corporations, reconciles the two returns, applies available Alberta credits, and sets up the corporate tax instalment and GST remittance calendar so payment deadlines aren't missed. Our founder, Ozgur Duymaz, holds a Ph.D. in accounting and finance and is a CPA (Canada), ACCA (UK) and CMA (US). If you want your Alberta corporate filing handled end to end, see our bookkeeping & tax filing service, estimate your liability with the corporate tax calculator, or browse common questions on the Alberta taxes FAQ hub.
Frequently asked questions
Alberta levies a 2% provincial rate on the first $500,000 of active business income for a Canadian-controlled private corporation, and 8% on general income above that limit. Combined with the federal 9% small-business and 15% general rates, a CCPC pays roughly 11% on small-business income and 23% on general income in the 2026 tax year.
No. Alberta has no provincial sales tax. Businesses operating only in Alberta charge and remit the 5% federal GST but never a provincial sales tax, which removes a full layer of registration, collection and remittance compared with British Columbia or Ontario.
The AT1 is Alberta's standalone corporate income tax return. Most corporations with a permanent establishment in Alberta must file an AT1 with Tax and Revenue Administration in addition to the federal T2 with the Canada Revenue Agency. Alberta does not participate in the CRA's collection agreement for corporate tax, so the province is filed separately.
The small-business deduction applies to the first $500,000 of active business income earned by an eligible CCPC in the 2026 tax year. That limit is shared among associated corporations and is ground down where a corporation earns more than $50,000 of passive investment income in the prior year.
No. Alberta has no provincial payroll tax and no employer health tax. Employers remit only federal CPP, CPP2 and EI on wages. This contrasts with British Columbia, where employers with payroll above $1 million pay the Employer Health Tax.
The AT1 is generally due within six months of the corporation's fiscal year-end, mirroring the federal T2 deadline. Any balance of Alberta corporate tax owing is typically due within two or three months of year-end depending on the corporation's status, so the payment deadline can fall before the filing deadline.