📅 March 2026 · ⏱️ 5 min read
If you're self-employed in Canada, the T2125 (Statement of Business or Professional Activities) is where you report your business income and expenses. And here's the thing — most self-employed Canadians are leaving money on the table by missing legitimate deductions they're entitled to claim.
Here are the top 10 deductions we see people miss most often.
If you use a portion of your home regularly and exclusively for business, you can claim a proportional share of household expenses. We cover this in depth in our home office deductions guide. For the 2025 tax year, the detailed method is the only option available — the temporary flat rate method ($2/day) ended after the 2022 tax year.
Eligible expenses include:
Calculate the percentage of your home used for business (typically by square footage) and apply it to your total eligible household expenses. You'll need a completed Form T2200 or T2200S from your employer if you're a salaried employee claiming home office expenses, but as a self-employed individual on the T2125, you claim directly.
If you use your personal vehicle for business, you can deduct the business-use portion of operating costs: fuel, insurance, maintenance, registration, lease payments or capital cost allowance (CCA). The key is keeping a mileage log — CRA can (and does) ask for it. Learn more in our complete vehicle expense guide.
Pro tip: Track your odometer reading on January 1 and December 31 each year, plus log every business trip. Apps like MileIQ make this painless.
Courses, workshops, certifications, conferences, and professional books directly related to your business are deductible. This includes online courses, webinars, and industry conferences — plus travel costs to attend them.
Professional liability insurance, errors & omissions (E&O) insurance, and commercial general liability insurance are all deductible. Many freelancers and consultants carry these policies but forget to claim them.
Fees on your business bank account, credit card annual fees (proportional to business use), wire transfer fees, and interest on money borrowed for business purposes are all deductible. If you use a personal credit card for business expenses, you can claim the proportional annual fee.
Annual dues to professional associations, chambers of commerce, trade organizations, and unions related to your business are deductible on Line 8760. Many professionals pay these automatically and forget they're claimable.
This goes beyond obvious advertising. Deductible marketing expenses include:
The tools you use to run your business are deductible: accounting software, project management tools, cloud storage, CRM subscriptions, design software, and even your business phone plan. If you use a personal phone for business, you can claim the business-use percentage.
If a client owes you money and you've determined it's uncollectable, you can write it off as a bad debt on Line 8590. You must have previously included the amount in your income and have made reasonable efforts to collect. Keep documentation of your collection attempts.
Major purchases like computers, furniture, equipment, and vehicles aren't fully deductible in the year of purchase — instead, you claim Capital Cost Allowance (depreciation) over several years. Many self-employed people either forget to claim CCA or don't realize they can claim it on assets they already own. Check if the Accelerated Investment Incentive applies to increase your first-year deduction.
Every legitimate deduction you miss is money left on the table. As a self-employed Canadian, the T2125 is your most powerful tax form — use it fully. Use our tax savings calculator to see how much you could save.
Not sure if an expense qualifies? That's exactly what YourTaxPilot is built for. Ask specific questions about your deductions and get instant answers based on current CRA guidelines.
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