Small Business Tax Deductions in Canada: Sole Proprietor vs Corporation

A sole proprietor and a small corporation deduct most of the same business expenses: rent, supplies, advertising, professional fees and the business share of mixed-use costs, under the same “reasonable and incurred to earn income” test. This page covers where the two differ: paying the owner, the home and the car, and the capital cost allowance (CCA) rules, including what happened to immediate expensing. The line-by-line list of expenses a sole proprietor claims on Form T2125, and the meals and entertainment limit, are on self-employed tax deductions. It is part of the self-employed taxes hub; business structures in Canada compares the structures themselves.

Paying yourself

A sole proprietor pays tax and CPP on the business’s net income whatever they withdraw. A corporation that pays its owner a salary deducts it, withholds payroll deductions and issues a T4; dividends come out of income the corporation has already paid tax on, and the dividend tax credit on the owner’s return accounts for that. Salary vs dividends compares the two.

The CRA’s shareholder benefits page lists examples of benefits a corporation gives an owner as a shareholder, which are taxed to the owner, including payment of the shareholder’s personal expenses, personal use of the corporation’s property (a house or car) without a fair-market-value charge, private health-care plans, and the shareholder’s life insurance premiums. It also says shareholder benefits don’t include benefits a shareholder receives as an employee.

Home office and vehicle

Sole proprietor. A workspace in your home is a business-use-of-home expense on line 9945 of Form T2125, and only if it meets one of the CRA’s two workspace tests; the home office page has the rule and the calculation. A car you own and drive for both business and personal trips is deducted in proportion to business kilometres, with a logbook to support it.

Corporation. The corporation doesn’t own your home, so the usual arrangement is rent. The CRA’s audit manual says the corporation may deduct rent paid to a shareholder for a home office if it is reasonable in the circumstances, but may disallow it when the corporation already has its own offices elsewhere; the shareholder pays tax on the gross rent, unless renting the space is a commercial activity that gives rise to a source of income, in which case the shareholder can claim reasonable expenses for the business part of the home. A car the corporation owns and the owner also drives personally is the corporation’s property: personal use without a fair-market-value charge is one of the CRA’s shareholder-benefit examples.

Capital cost allowance: the same classes for both

Neither structure deducts the full cost of capital property in the year it’s bought. Both claim CCA, a yearly deduction by class on a declining balance (a sole proprietor on Form T2125, a corporation on Schedule 8 of the T2 return). Neither has to claim the maximum in any year: you can claim any amount from zero to the maximum allowed.

Rates are from the CRA’s classes of depreciable property page. Vehicle classes, cost ceilings and the business-use share are on the vehicle expenses page.

First-year CCA: the half-year rule and the investment incentives

Guide T4002’s basic rule is the half-year rule: in the year you acquire property, the CCA claim is limited to 50% of the net additions to a class. Property that qualifies for one of two investment incentives is outside it. Both incentives, and the 100% first-year deduction for some classes, are law: the Budget 2025 Implementation Act, No. 1 (S.C. 2026, c. 3) amended the Income Tax Regulations when it received royal assent on March 26, 2026. Guide T4002 still describes the newer measures as “proposed changes”.

• Accelerated investment incentive (acquired before 2025). Property acquired after November 20, 2018 and before 2025 that becomes available for use before 2028 qualifies (Income Tax Regulations, section 1104). For property that becomes available for use in the 2024 to 2027 phase-out period, the CRA’s AII page says you calculate CCA at the class rate without applying the half-year rule.
• Reaccelerated investment incentive (acquired after 2024). Property acquired after 2024 that becomes available for use before 2034 qualifies, other than zero-emission vehicles in Classes 54 to 56, which have their own rates (section 1104). In classes without their own factor in the regulations, the year’s addition is increased by 1/2 before the CCA rate is applied when the property becomes available for use before 2030, so the first-year claim is 1.5 times the class rate; from 2030 until the incentive ends, the first-year claim is the class rate, still without the half-year rule (section 1100).
• 100% first year for Classes 44, 46 and 50. New additions to Classes 44, 46 and 50 (patents, data network equipment and computers) acquired after April 15, 2024 that become available for use before 2027 can be deducted in full in the first year (section 1100).
• Exceptions. Most small tools in Class 12 are not subject to the half-year rule, but software in Class 12 is. The enhanced first-year allowance isn’t available for certain property bought from a non-arm’s length person, so the half-year rule may still apply to it.

The total deducted over the life of the property is the same under every rule; a larger first-year claim leaves less to claim later.

Immediate expensing: who it covered and when it ended

The immediate expensing incentive let an eligible person or partnership deduct the full cost of designated property, up to $1.5 million per tax year, in the year it became available for use. The limit was shared among associated businesses, and the deduction couldn’t exceed the income (before CCA) from the business the property was used in. Long-lived property in CCA classes 1 to 6, 14.1, 17, 47, 49 and 51 (generally long-lived assets, such as buildings and goodwill) never qualified. The windows differed by taxpayer, as the Department of Finance set out in 2022:

The CRA’s CCA instructions say that for a property to be immediate expensing property, it has to be available for use before 2025. Property that becomes available for use in 2026 falls outside both windows; for those purchases, the first-year rules in the previous section apply.

Where the deduction saves tax

The same $1,000 deduction is worth different amounts in each structure. A sole proprietor’s deduction lowers personal taxable income and the CPP contributions calculated on net self-employment income; self-employed tax deductions works through an example. A corporation’s deduction lowers corporate income, which for a small Canadian-controlled private corporation is taxed at the reduced small business rate: The small business deduction, which brings the federal rate down to 9%, is available only to a corporation that was a Canadian-controlled private corporation (CCPC) throughout the year, and only on active business income carried on in Canada up to a $500,000 business limit that associated corporations share; the limit shrinks when the group's passive investment income is over $50,000 (reaching zero at $150,000) or its taxable capital is over $10 million. Should I incorporate my side hustle? looks at when that difference matters.

Related pages

• Self-employed tax deductions: the T2125 expense checklist
• Business-use-of-home expenses for the self-employed
• Vehicle expenses for the self-employed
• Business structures in Canada
• Salary vs dividends from a corporation
• CCPC tax planning guide