One of the most significant financial advantages of running a business in Canada is the ability to deduct legitimate business expenses from your income before calculating tax. Every dollar deducted reduces your taxable income — saving you the tax you would have paid on that dollar. This guide covers the full range of deductible expenses for Canadian small businesses, including commonly missed deductions.
Section 18 of the Income Tax Act sets the general rule: you can deduct expenses that are reasonable and incurred for the purpose of earning business income. You cannot deduct: personal expenses, capital expenditures (though you may claim CCA — see below), expenses that are unreasonable, or amounts specifically excluded by the Act.
Fully deductible: website costs, online advertising (Google Ads, Facebook Ads), print materials, trade show fees, promotional items, business cards, and sponsorships directly related to your business. Note: advertising in foreign publications may have restrictions if targeting Canadian customers.
Business bank account fees, merchant processing fees, NSF fees, credit card annual fees (on business cards), interest on business loans, and factoring fees are all deductible. Interest on money borrowed to earn business income is specifically deductible under the Income Tax Act.
Accounting fees, legal fees (for business purposes), bookkeeping, consulting, and management fees paid to arm's-length parties are fully deductible. Note: legal fees for purchasing assets may need to be capitalized rather than expensed immediately.
Office supplies, printer ink, postage, courier costs, pens, paper, and other consumables are fully deductible in the year purchased. This is different from office equipment (computers, furniture), which is capitalized.
Business-use telephone and internet expenses are deductible. If you use your personal phone for business, you can deduct the business-use portion — document the percentage used for business vs. personal purposes.
Monthly or annual SaaS subscriptions (QuickBooks, Xero, Slack, Microsoft 365, project management tools) used for business purposes are fully deductible as current expenses. This changed in recent years — software is now generally deducted as a current expense rather than capitalized under CCA Class 12.
Rent paid for commercial space, office, warehouse, or retail location is fully deductible. If you rent a co-working space, that's also deductible. Parking costs for business purposes are deductible (not commuting costs).
Employee salaries, wages, bonuses, and employer CPP/EI contributions are fully deductible. Reasonable owner-manager salaries paid to the owner of an incorporated business are deductible to the corporation. Salaries paid to family members must be reasonable and at arm's-length rates.
Business liability insurance, property insurance, errors and omissions (E&O) insurance, cyber liability insurance, and business interruption insurance premiums are fully deductible. Life insurance is generally not deductible unless it's used as collateral for a business loan.
Business travel is deductible — airfare, hotels, taxis/Uber, train tickets, and 50% of meals while travelling for business. You must be able to show the trip had a genuine business purpose. Keep all receipts and a travel log documenting the business purpose of each trip.
Only 50% of meal and entertainment expenses incurred for business purposes are deductible. The 50% limit applies to business lunches, client dinners, and entertainment at sporting events. You need documentation of who you entertained and the business purpose.
If you use part of your home for business, you can deduct the proportional business-use share of home expenses. The workspace must be either:
Deductible home office expenses (proportional to business-use area as a percentage of total home area):
Dedicated office furniture and equipment in the home office are deductible through CCA or as current expenses if they qualify.
Vehicle expenses are deductible based on business-use percentage. You must maintain a vehicle log recording every business trip — date, destination, purpose, and km driven. Without a log, CRA can deny the deduction entirely.
Deductible vehicle expenses: fuel, oil changes, repairs and maintenance, insurance, license and registration, car washes, parking (business-related), and CCA on the vehicle (Class 10 or 10.1).
For a vehicle used 60% for business, you can deduct 60% of all eligible vehicle costs. Luxury vehicle CCA is subject to a capital cost limit (approximately $36,000 for passenger vehicles in 2025).
Capital expenditures — equipment, computers, vehicles, furniture, leasehold improvements — cannot be expensed immediately. Instead, they're depreciated over time using CCA. Each class of asset has a prescribed CCA rate:
The half-year rule applies in the year of acquisition — you can only claim half the normal CCA rate in the first year you own an asset.
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