10 Tax Deductions Self-Employed Canadians Commonly Miss

Self-employed Canadians file their business income and expenses on a T2125 (Statement of Business Activities). The CRA allows you to deduct any expense that is reasonable and incurred to earn business income. In practice, many people either miss deductions entirely or claim them incorrectly and get reassessed. Here are ten areas worth paying attention to.

1. Home Office Expenses

If you work from home regularly, you can deduct a portion of your home expenses — including rent (or mortgage interest, not the principal payment), heat, electricity, internet, and home insurance — based on the percentage of your home used for work. The workspace must be used exclusively for business, or used as the principal place of work. Keep floor plans or photos in case the CRA asks.

2. Vehicle Expenses

You can deduct the business-use percentage of gas, oil changes, insurance, registration, car washes, repairs, and loan interest. You must keep a mileage logbook showing the date, destination, purpose, and kilometres for every business trip. At year-end, divide business kilometres by total kilometres to get your deductible percentage. Without a logbook, the CRA will deny the claim.

3. Business-Use Portion of Your Phone and Internet

Your cell phone and home internet are partially deductible if you use them for business. Estimate the business-use percentage honestly — 50–70% is common for most sole proprietors. Keep a few months of bills to support your calculation.

4. Professional Fees and Subscriptions

Accounting fees, legal fees, professional membership dues, and software subscriptions directly related to your business are fully deductible. This includes accounting software, project management tools, industry association dues, and your CPA's fee for preparing your return.

5. Health and Dental Insurance Premiums

Self-employed Canadians can deduct premiums paid for private health services plan coverage under line 21200 of their T1. This is different from the medical expense credit — it's a deduction, which is more valuable. If you're paying out-of-pocket for health or dental coverage because you don't have an employer plan, this deduction is often missed entirely.

6. Meals and Entertainment (50%)

Business meals with clients, referral partners, or employees are 50% deductible. Keep the receipt and note on it who was there and the business purpose. This is the most-audited deduction on small business returns, so your documentation needs to be clear.

7. Capital Cost Allowance (CCA) on Equipment

Equipment, computers, furniture, and tools are not fully deductible in the year of purchase — they're depreciated over time through CCA. Class 50 (computers) = 55% declining balance. Class 8 (office furniture, equipment) = 20%. Class 10 (vehicles) = 30%. The Immediate Expensing rules introduced in 2021 allowed full deduction in Year 1 for eligible depreciable property — check whether this still applies to your situation.

8. Bank Charges and Interest

Monthly bank fees on your business account, service charges, and interest on a business line of credit or loan are deductible. Keep your business and personal accounts separate — it makes this much easier to track.

9. Salaries Paid to Family Members

If a spouse or family member genuinely works in your business, you can pay them a salary and deduct it. The amount must be reasonable — comparable to what you'd pay an arm's-length employee for the same work. It must actually be paid (not just documented on paper). Done properly, this splits income with a lower-income earner and reduces the family's overall tax bill.

10. Professional Development and Education

Courses, conferences, workshops, and books directly related to maintaining or improving skills in your current business are deductible. If you're a bookkeeper taking an advanced Excel course or a consultant attending an industry conference, those are deductible. If the education is preparing you for a new career, it generally is not.