As a small business owner or self-employed individual in Canada, you have access to dozens of tax deductions that can significantly reduce what you owe the CRA. Most Canadians miss at least a few of these — leaving money on the table every tax season.
This guide covers every major deduction available to Canadian small businesses in 2025, with clear explanations of what qualifies and what doesn't.
⚠️ Important: Always keep receipts for every expense you claim. The CRA can audit your returns up to 4 years after filing. A good rule: if you can't prove it, don't claim it.
1. Home Office Expenses
If you work from home — even part of the time — you can claim a portion of your home expenses as a business deduction. This applies to both self-employed individuals and incorporated business owners.
What you can claim:
- Rent (proportional to workspace)
- Mortgage interest (not principal)
- Heat and hydro
- Internet bills
- Home insurance (proportional)
- Property taxes (proportional)
- Maintenance and repairs
How to calculate:
Divide your workspace square footage by your total home square footage. That percentage applies to all eligible home expenses.
Example: 200 sq ft office ÷ 1,000 sq ft home = 20% of home expenses claimable.
✅ Tip: Your workspace must be used exclusively and regularly for business. A spare bedroom occasionally used for work may not qualify.
2. Vehicle Expenses
If you use your vehicle for business purposes, you can deduct a portion of your vehicle costs. Keep a mileage log — the CRA requires it.
What you can claim:
- Gas and fuel
- Insurance
- Repairs and maintenance
- Parking fees
- Lease payments
- CCA (Capital Cost Allowance) on purchased vehicles
How to calculate:
Track total kilometres driven and business kilometres separately. The business percentage applies to all vehicle expenses.
Example: 15,000 km total, 9,000 km business = 60% of all vehicle expenses claimable.
3. Phone and Internet
Your phone and internet bills are partially deductible if used for business. Claim the business-use percentage of your monthly bills.
- Cell phone — claim the business use portion (e.g. 70% if mainly used for work)
- Internet — claim the business use portion
- Second phone line used exclusively for business — 100% deductible
4. Business Meals and Entertainment
Meals and entertainment with clients or business partners are 50% deductible in Canada. Keep receipts and note who you met with and the business purpose.
⚠️ Note: 100% of the meal must have a genuine business purpose. Personal meals are never deductible.
5. Professional Development
Any training, courses, or education directly related to your business is 100% deductible.
- Online courses and workshops
- Industry conferences and seminars
- Books and trade publications
- Professional memberships and dues
6. Professional Services
Fees paid to professionals for your business are fully deductible.
- Accounting and bookkeeping fees
- Legal fees for business matters
- Consulting fees
- Financial advisor fees (business related)
7. Office Supplies and Equipment
- Paper, pens, printer ink — 100% deductible
- Computer and laptop — deductible via CCA (Class 10 or 50)
- Desk, chair, furniture — deductible via CCA
- Software subscriptions — 100% deductible
8. Advertising and Marketing
All costs to promote your business are fully deductible.
- Website hosting and domain fees
- Social media advertising
- Google Ads
- Business cards and flyers
- Logo and graphic design
9. Insurance
- Business liability insurance — 100% deductible
- Professional indemnity insurance — 100% deductible
- Key person insurance — may be deductible
10. Salaries and Wages
If you have employees or contractors, their pay is fully deductible as a business expense. This includes:
- Employee salaries and wages
- Contractor and freelancer payments
- CPP and EI contributions (employer portion)
- Employee benefits
Home Office
% of rent, utilities, internet based on workspace size
Vehicle
% of gas, insurance, maintenance based on business km
Phone & Internet
Business-use % of monthly bills
Meals
50% of business meals with clients
Training
100% of business-related courses and conferences
Professional Fees
100% of accounting, legal, and consulting fees
Small Business Deduction — Lower Your Corporate Tax Rate
If your business is incorporated as a Canadian Controlled Private Corporation (CCPC), you qualify for the Small Business Deduction — reducing your federal corporate tax rate from 15% to just 9% on the first $500,000 of active business income.
That's a saving of up to $30,000 per year on corporate taxes alone.
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Download Free on App StoreWhat You Cannot Deduct
- Personal expenses of any kind
- Club memberships (golf, fitness) unless client entertainment
- Fines and penalties
- Life insurance premiums (generally)
- Principal mortgage payments (only interest)
Keep Good Records
The CRA requires you to keep all business records and receipts for 6 years from the end of the tax year they relate to. Digital copies are acceptable.
Good record-keeping habits:
- Save all receipts digitally (photograph them immediately)
- Keep a mileage log for vehicle use
- Maintain a separate business bank account
- Use accounting software or track in a spreadsheet monthly
✅ Bottom line: Most Canadian small business owners and self-employed individuals save thousands of dollars per year by properly claiming all eligible deductions. If you're unsure what you can claim, a 30-minute session with a Canadian tax professional is often worth it.
Need Help with Your Taxes?
Smart Canada Tax offers one-on-one sessions with a qualified Canadian tax professional — no expensive hourly billing, just straightforward advice when you need it.
- Personal tax session — $34.99
- Corporate tax session — $79.99
Book directly through the app, visit smartcanadatax.help or message us through our contact form and we will get back to you.