What business expenses can I deduct in Canada?
The CRA allows deductions for expenses that are reasonable, incurred to earn business income, and not personal or capital in nature. Common deductibles include salaries, rent, professional fees, software, advertising, and 50% of meals and entertainment. Home office costs and vehicle expenses require specific documentation.
Detailed Explanation
The fundamental rule for business expense deductions in Canada comes from section 18 of the Income Tax Act: you can deduct expenses incurred to earn income from a business or property, provided they are reasonable in the circumstances and not of a capital nature. Understanding how this applies to specific expense categories is essential for maximising your legitimate deductions.
Fully deductible business expenses
The following are fully deductible (100%) when incurred for business purposes: - Salaries and wages paid to employees (including owner-manager salary) - Rent for office or business premises - Professional fees: accountant, lawyer, bookkeeper, consultant fees - Software subscriptions: business software, cloud services (SaaS) - Office supplies: paper, printing, stationery - Business insurance premiums - Advertising and marketing: website costs, Google Ads, social media ads, print advertising - Phone and internet: business portion only - Bank charges and interest on business loans - Subscriptions: professional memberships, trade publications - Training and education: courses directly related to your current business activities - Repairs and maintenance on business equipment and property - Travel expenses (flights, hotels, ground transport) for genuine business travel — not commuting
50% limitation: meals and entertainment
Meals and entertainment expenses are deductible at only 50% of the amount spent. This includes: - Business meals (with clients, employees, or business associates) - Restaurant meals during business travel (the 50% applies to the meal cost; separate accommodation is fully deductible) - Entertainment: tickets to sporting events, concerts, theatre when for business purposes - Promotional gifts of food, beverages, or entertainment
Example: you take a client to dinner and spend $200 including HST. You can deduct $100 (50%). The receipt must clearly identify the business purpose and the business associate present.
100% of meals are deductible if they are provided at a business event open to all employees (such as a holiday party for up to 6 events per year), if they are for a remote work camp where employees are required to live at the worksite, or if the meal is for a charity event.
Home office expenses
You can deduct a portion of your home costs if you use part of your home exclusively (or primarily) for business and it is your principal place of business. Two options:
- Detailed method: calculate the business-use percentage (e.g., a 150 sq ft office in a 1,500 sq ft home = 10%), then deduct 10% of eligible home expenses: rent or mortgage interest, utilities (hydro, gas, water), home internet, maintenance, property taxes, home insurance. Mortgage principal is never deductible.
- Simplified flat rate: $2 per work day, up to $500 per year. This was introduced during COVID and continues to be available.
Vehicle expenses
If you use a vehicle for both personal and business purposes, you can deduct only the business-use portion of operating costs: gas, insurance, maintenance, parking (at business destinations), and Capital Cost Allowance (CCA) on the purchase price.
The business percentage is determined by the ratio of business kilometres driven to total kilometres driven in the year. A logbook is required — the CRA can and does disallow vehicle deductions without adequate mileage logs. The logbook must record: date, destination, purpose, and kilometres driven for each business trip.
Capital cost allowance (CCA) — depreciation
Capital assets (equipment, computers, furniture, vehicles, buildings) are not immediately deductible. Instead, they are depreciated over time using the CCA system. Each class of asset has a prescribed annual maximum deduction rate: - Class 8 (furniture, equipment): 20% declining balance - Class 10 (vehicles under $34,000 original cost): 30% declining balance - Class 10.1 (expensive vehicles, capped at $36,000 in 2026): 30% - Class 50 (computers, servers): 55% declining balance - Class 14.1 (goodwill, customer lists): 5% per year - Class 12 (small tools under $500): 100% in year of purchase
A half-year rule applies in the year of acquisition — you can only claim half the normal CCA in the first year.
Source: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partnerships/business-expenses.html
Real-World Examples
Consultant claiming home office and vehicle
A freelance consultant works from a 200 sq ft home office in a 1,600 sq ft home (12.5% business use). Annual home costs: $24,000 rent + $1,200 utilities + $1,800 internet = $27,000. Home office deduction: 12.5% x $27,000 = $3,375. She also drove 15,000 km for business out of 30,000 total (50% business). Vehicle costs: $8,000. Vehicle deduction: 50% x $8,000 = $4,000. Total home office + vehicle deduction: $7,375.
Corporation deducting software and professional fees
A small software agency pays $12,000 in annual SaaS subscriptions (accounting, project management, communications), $8,000 in accountant and legal fees, $15,000 in Google Ads, and $4,000 in travel to client sites. All are fully deductible. The agency also had $6,000 in client entertainment expenses — deductible at 50%, so $3,000. Total deductions: $42,000, reducing taxable income at the 12.2% Ontario SBD rate by $5,124.
Owner-manager with mixed-use vehicle
An owner-manager bought a $45,000 SUV for mixed personal/business use. Under CRA rules, expensive vehicles are placed in Class 10.1 with an acquisition cost capped at $36,000 (2026 limit). First-year CCA at 30% with half-year rule: 30% x $36,000 x 0.5 x 60% business use = $3,240. The standby charge (taxable benefit to the employee for personal use) must also be calculated and added to the employee's T4.
Common Mistakes to Avoid
- Deducting 100% of meals and entertainment — the 50% limitation is automatic and the CRA assesses it routinely on audit.
- Not keeping a vehicle logbook and estimating business kilometres — without a contemporaneous logbook, the CRA can disallow the entire vehicle deduction.
- Deducting personal expenses through the corporation (vacations booked as business trips, personal groceries, family vehicle maintenance) — these create shareholder benefits taxable to the individual plus potential reassessments and penalties.
- Treating capital asset purchases (new equipment, computers, furniture) as immediate deductions rather than going through the CCA system with the correct class and rate.
Frequently Asked Questions
Can I deduct business expenses that I paid personally rather than through my corporation?
Yes. If you paid a legitimate business expense personally (e.g., on a personal credit card), you can submit an expense claim to your corporation and be reimbursed tax-free, provided the expense was incurred for business purposes. The corporation then records the expense. Keep all original receipts. This is common practice and is acceptable — what matters is that the expense was for business, not whose credit card was used.
Is a home office deduction worth claiming if I have a small space?
Yes, especially in cities with high housing costs. Even a 10% business-use percentage on $30,000 annual rent generates a $3,000 deduction. For a corporation in Ontario, that is $366 in tax savings at the SBD rate (12.2%). For a sole proprietor at a 46% marginal rate, it is $1,380 in savings. The deduction is proportional and real — do not skip it because the space is small.
Are gifts to clients deductible?
Gifts of food, beverages, or entertainment to clients fall under the 50% meals and entertainment limitation. Cash gifts are not deductible. Non-cash gifts (wine, gift baskets, business merchandise) are subject to the 50% rule if they are food/beverage/entertainment. Other non-cash gifts (books, branded merchandise) may be fully deductible as advertising and promotional expenses, provided they are reasonable in value.
Can I deduct expenses before my business officially starts?
Pre-business start-up expenses are generally not deductible until the business actually commences. However, once operational, you may be able to deduct certain pre-start expenses incurred in the same tax year the business began, particularly if they are in the nature of current expenses (not capital). Significant pre-start capital expenditures become eligible for CCA once the business is active.
What records do I need to keep for CRA audits?
Keep all original receipts, invoices, bank statements, credit card statements, and contracts for at least 6 years from the end of the tax year they relate to. For vehicles, keep a logbook for the full year (at minimum a representative 3-month period if you can demonstrate it represents the full year's pattern). For home office, keep utility bills, mortgage/lease documents, and a diagram showing the office space and total home area. Digital scans of paper receipts are accepted by the CRA.
Practical Tips
- Use a dedicated business credit card or bank account for all business expenses — it makes year-end accounting vastly simpler and provides a clear audit trail with no personal transaction mixing.
- Start your vehicle logbook on January 1 of each year and record every business trip consistently — even a few months of missing data makes the whole-year logbook suspect on audit.
- Review your home office claim annually if your home size or rent changes — even a small percentage shift changes the deductible amount significantly in high-rent cities.
- Photograph receipts immediately with an accounting app before they fade — thermal paper receipts (restaurant, fuel) can be unreadable within months and the CRA requires legible documentation.
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