Corporate Tax — Frequently Asked Questions
26 plain-language answers to the questions Canadian business owners ask RN Canada about Corporate Tax.
As of 2026, the federal corporate tax rate is 9% on small-business income (up to the $500,000 limit) and 15% on general income. Provincial rates are added on top — for example 2% or 8% in Alberta. RN Canada's corporate-tax calculator combines federal and provincial rates for your total liability.
As of 2026, the federal small-business deduction limit is $500,000 of active business income, taxed at the reduced 9% federal rate plus the low provincial small-business rate. Income above the limit is taxed at general rates. The limit is shared among associated corporations. RN Canada plans structures to preserve the full limit.
As of 2026, the T2 corporate return is due six months after the corporation's fiscal year-end, while any tax owing is due two months after year-end (three months for many CCPCs). In Alberta, the AT1 is also due. RN Canada tracks T2 and AT1 deadlines and files on time for clients.
As of 2026, corporate capital gains use a 50% inclusion rate (the proposed 2024 increase was cancelled), with the non-taxable half added to the capital dividend account for tax-free distribution to shareholders. RN Canada's capital-gains calculator estimates the corporate tax and tracks the capital dividend account.
As of 2026, active business income qualifies for the low small-business rate, while passive investment income (interest, rents, portfolio dividends) is taxed at high refundable rates and can grind down the small-business limit once passive income exceeds $50,000. RN Canada structures investments to protect the small-business deduction.
As of 2026, a corporation can deduct reasonable expenses incurred to earn income — wages, rent, supplies, professional fees, vehicle and home-office portions, and capital cost allowance on assets. Personal and capital expenses have limits. RN Canada maximizes legitimate deductions in your bookkeeping while keeping claims CRA-defensible.
As of 2026, capital cost allowance is the tax depreciation a corporation claims on assets like equipment, vehicles, and buildings, deducted over time at class-specific rates rather than all at once. Some classes allow accelerated write-offs. RN Canada calculates optimal CCA claims to lower corporate tax while preserving future deductions.
As of 2026, a corporation generally must pay monthly or quarterly tax instalments if its tax owing exceeds a small threshold, rather than paying the full amount at year-end. Missing instalments triggers interest. RN Canada calculates instalment requirements and schedules them so clients avoid CRA interest charges.
As of 2026, the lifetime capital gains exemption shelters a large indexed amount of gains on the sale of qualified small-business corporation shares or farm/fishing property from tax. It is a major incentive for CCPC owners selling their business. RN Canada plans share structures so owners qualify for the exemption at exit.
As of 2026, integration aims to make earning income through a corporation and then paying it out as dividends roughly tax-neutral versus earning it personally, via the dividend tax credit and refundable taxes. It's rarely perfect. RN Canada uses integration mechanics to optimize how owners draw income from their company.
As of 2026, RDTOH is a notional account tracking refundable tax a corporation pays on passive investment income, refunded when the company pays taxable dividends to shareholders. It prevents a deferral advantage on investment income. RN Canada tracks RDTOH so dividend timing recovers the maximum refund.
As of 2026, a corporation can carry non-capital losses back 3 years and forward 20 years, and net capital losses back 3 years and forward indefinitely, to offset income in other years. This recovers tax or shelters future profit. RN Canada applies loss carryovers to minimize a corporation's overall tax.
As of 2026, the small-business rate (9% federal plus a low provincial rate) applies to active income up to $500,000, while the general rate (15% federal plus the higher provincial rate) applies above that. In Alberta the combined rates are about 11% and 23%. RN Canada's corporate-tax calculator estimates both.
As of 2026, rental income earned by a corporation is usually passive investment income taxed at high refundable rates, unless the company employs more than five full-time employees in the rental activity, which can make it active. RN Canada classifies rental income correctly and structures it to manage the corporate tax cost.
As of 2026, the capital dividend account tracks the tax-free half of corporate capital gains and certain other amounts, which a private corporation can pay out to shareholders as a tax-free capital dividend. Timing and elections matter. RN Canada monitors the CDA and times capital dividends to move money out tax-free.
As of 2026, no corporate income tax is owed in a year with no taxable profit, but you must still file the T2 (and Alberta AT1) return on time even with a nil or loss result. Not filing triggers penalties. RN Canada files nil and loss-year corporate returns to keep clients compliant.
As of 2026, once a CCPC's associated group earns over $50,000 of passive investment income in a year, the $500,000 small-business limit is reduced by $5 for every $1 above $50,000, eliminating it at $150,000. RN Canada manages passive income to protect the low small-business rate.
As of 2026, the Scientific Research and Experimental Development (SR&ED) program gives generous refundable tax credits to Canadian companies doing eligible R&D, with CCPCs receiving the richest rates. Many companies underclaim. RN Canada identifies eligible SR&ED activity and supports claims to recover R&D tax credits.
As of 2026, legitimate strategies include maximizing deductions and CCA, paying reasonable salaries to family who work, optimizing salary-versus-dividend mix, deferring income at the low corporate rate, and claiming SR&ED. RN Canada's CFO advisory builds a year-round corporate tax plan rather than a year-end scramble.
As of 2026, a corporation can choose any fiscal year-end (not just December 31), which sets its T2 filing deadline and can aid tax deferral and cash-flow planning. Once chosen, changing it needs CRA approval. RN Canada advises on the optimal corporate year-end and handles the related filings.
It depends on the practitioner's own profession and province, not on one national rule. Whether a professional corporation can hold the licence to practise, and who may own its shares, is decided by that profession's regulatory college in the province where the practitioner works — a physician in Alberta answers to a different regulator than a dentist or a lawyer, and a colleague's structure in another province does not automatically transfer. RN Canada's professional corporation accounting guide and healthcare clinic accounting guide cover the eligibility and share-ownership questions in detail.
It is the written record, prepared as related-party cross-border transactions occur rather than reconstructed later, that shows a taxpayer made reasonable efforts to price those transactions on arm's-length terms. A complete file generally describes the related parties and their relationship, the property or services transferred, the functions performed and risks assumed by each side, the pricing method selected and why, and the comparable data relied on. Without it, a taxpayer has no evidence of the reasonable efforts the rules expect if the CRA later adjusts the price. RN Canada's transfer pricing documentation guide and transfer pricing primer cover the full requirement and the penalty it protects against.
An external audit is performed by an appointed auditor to express an opinion on the financial statements for outside parties such as lenders and shareholders. Internal audit looks inward: it is an independent, objective function evaluating whether the organization's own risk management, control and governance processes are actually working, and it reports to management and the audit committee or board rather than issuing a public opinion. The two are complementary — strong internal controls, confirmed by internal audit, typically make the external audit faster and less costly. RN Canada's internal audit services guide sets out engagement types and how smaller companies use co-sourced or outsourced models.
A corporation with more than $3,000 in net tax owing pays instalments monthly, due on the last day of each month of its tax year, unless it qualifies as an eligible small CCPC that can pay quarterly instead, due on the last day of each quarter. The remaining balance of tax is due two months after the corporation's fiscal year-end, or three months for an eligible small CCPC — well before the T2 return itself, which is due six months after year-end. New corporations are not required to pay instalments in their first tax year.
The federal small business deduction limit is $500,000 of active business income for the 2026 tax year, taxed at the reduced 9% federal small-business rate plus the applicable provincial small-business rate. Income above that limit is taxed at the general federal rate of 15% plus the province's general rate, and the $500,000 limit is shared among associated corporations rather than granted separately to each one.
Contemporaneous transfer-pricing documentation is the written record, prepared as related-party cross-border transactions happen rather than reconstructed afterward, showing a taxpayer made reasonable efforts to price those transactions on arm's-length terms. A complete file describes the related parties and their relationship, the property or services transferred, the functions performed and risks assumed by each side, the pricing method chosen and why, and the comparable data relied on. Without it, a taxpayer loses a key protection if the CRA later adjusts the transfer price.