Canadian Business Expenses: Complete Guide
What counts as a deductible business expense in Canada — and what doesn't. Complete guide with examples for BC small businesses.
Knowing which business expenses you can deduct — and which you can’t — is one of the most important skills for a Canadian business owner. This guide walks through the full range of deductible expenses, how CRA evaluates them, and the traps that trip up even experienced entrepreneurs.
What CRA Considers a Deductible Business Expense
CRA allows a deduction for any expense that is reasonable in amount and incurred for the purpose of earning business income. The key test: would a prudent businessperson have made this expenditure?
Examples of clearly deductible expenses: advertising, office supplies, rent, salaries, professional fees (legal, accounting), insurance, utilities, bank charges, and business-related travel and meals (50% of meals is deductible).
Broad categories include: cost of goods sold, overhead, selling expenses, administrative costs, and capital cost allowance (depreciation) on assets. The Income Tax Act doesn’t give an exhaustive list — it’s about purpose and reasonableness.
Capital vs. Current Expenses — Why the Distinction Matters
- Current expenses (also called operating expenses) are fully deductible in the year they’re incurred — rent, utilities, supplies, wages, repairs.
- Capital expenses are purchases that provide a lasting benefit (e.g., a computer, vehicle, building). These cannot be expensed fully in one year — instead, you claim Capital Cost Allowance (CCA) over the asset’s useful life.
- Repair vs. improve: fixing a broken window is a current expense (deductible now). Replacing all windows with energy-efficient upgrades is a capital improvement (deductible over time).
- One BC contractor we worked with had been writing off full vehicle purchases for years. CCA reclassification resulted in 3 years of reassessments and interest. Knowing the difference saves headaches.
The Reasonable Expectation of Profit (REOP) Rule
CRA can deny deductions for a business that shows no reasonable expectation of profit — i.e., it operates like a hobby. You don’t need to be profitable every year, but you need a genuine commercial intention.
Factors CRA considers: profit and loss history, your business plan, the time and effort you invest, your qualifications, and whether your activities are planned in a businesslike manner.
We’ve seen the REOP rule applied to side hustles and part-time ventures where the owner wasn’t serious about profitability. If you’re running a side business, keep a separate bank account, track expenses diligently, and have a realistic profit plan.
Personal vs. Business — The Mix-Use Trap
- Expenses with personal elements must be allocated reasonably. Common examples: vehicle expenses (business vs. personal km), home office (business-use percentage), cell phone (business portion of usage), and meals.
- CRA requires documentation for mixed-use expenses: a mileage log for the vehicle, a floor plan for the home office, and itemized phone bills. Estimate-based allocations are a red flag.
- The 50% meal and entertainment rule applies to most dining and entertainment costs. For a $100 client dinner, you deduct $50. Exceptions exist for certain industries (e.g., remote work camps).
Commonly Overlooked Deductions
Here are deductions we regularly find that clients have missed: business-use-of-home expenses beyond basic utilities (like cleaning for a home office used for client meetings), professional development and courses, membership fees for industry associations, interest on business loans, and capital cost allowance on assets under $500 (which can be fully expensed in Canada under the accelerated CCA rules).
Start-up costs: you can deduct expenses incurred before your business officially opened — market research, advertising, legal fees, and professional consulting. These are treated as current expenses up to certain limits.
One of our Victoria-based clients had never claimed their annual QuickBooks subscription, industry magazine subscriptions, or the business portion of their home internet. The total overlooked deduction was about $2,400 per year.
We do a full deduction discovery session with every new client. You’d be surprised how many legitimate expenses get missed — and how many improper ones get claimed. Contact CloudKeeping for a comprehensive expense review.
Key Takeaways
- 1Any expense that is reasonable and incurred to earn business income is generally deductible.
- 2Distinguish between current expenses (deductible now) and capital expenses (deductible over time via CCA).
- 3Mixed-use expenses (vehicle, home office, phone) must be allocated reasonably with documented support.
- 4The REOP rule requires a genuine profit motive — side businesses need a businesslike approach.
- 5Commonly missed deductions: professional development, software subscriptions, business-use-of-home beyond basics.
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