How Self-Employment Tax Works in Canada
Being your own boss comes with real financial freedom — but it also comes with additional tax responsibilities that employees don't face. Understanding your obligations early can save you from unexpected bills and penalties down the road.
As a self-employed Canadian, you are responsible for:
- Reporting all business income on your T1 return
- Paying both the employee and employer portions of Canada Pension Plan (CPP) contributions
- Remitting GST/HST if your revenues exceed $30,000 over four consecutive quarters
- Making quarterly instalment payments if your tax owing exceeds a certain threshold
Reporting Self-Employment Income
Self-employment income is reported on Form T2125 (Statement of Business or Professional Activities), which is included in your T1 General return. You report your gross income and then deduct eligible business expenses to arrive at your net business income — which is what gets taxed.
If you have multiple business activities, you may need to complete a separate T2125 for each.
What Business Expenses Can You Deduct?
This is where self-employed individuals have a significant advantage over employees. Eligible business expenses reduce your taxable income directly. Common deductions include:
- Home office expenses – a reasonable portion of rent/mortgage interest, utilities, internet, and maintenance
- Vehicle expenses – fuel, insurance, maintenance, and depreciation (Capital Cost Allowance) for the business-use portion of your vehicle
- Office supplies and equipment
- Professional development and training
- Business insurance
- Advertising and marketing costs
- Accounting and legal fees
- Meals and entertainment – 50% of costs for business-related meals
- Software and subscriptions used for business
- Bank fees on a dedicated business account
Important: Expenses must be reasonable, documented, and incurred to earn business income. Personal expenses are not deductible.
CPP Contributions for the Self-Employed
Employees split CPP contributions with their employer. Self-employed individuals pay the full combined rate on net self-employment income. While this increases your tax bill, it also means you're building CPP entitlement for retirement. You can calculate your required contributions using Schedule 8 of your T1 return.
GST/HST: When You Need to Register
Once your business revenues exceed $30,000 in any single calendar quarter or over four consecutive quarters, you must register for a GST/HST number with the CRA. After registration, you collect GST/HST from clients and remit it (minus any Input Tax Credits you claim on business purchases). Registering voluntarily before the threshold can actually benefit you if your business has significant expenses, allowing you to claim those input tax credits.
Tax Deadlines for the Self-Employed
| Obligation | Deadline |
|---|---|
| T1 Return Filing | June 15 (but balance owing due April 30) |
| Balance Owing Payment | April 30 |
| Quarterly GST/HST Filing | 1 month after each quarter end |
| CPP Instalment Payments | March 15, June 15, Sept 15, Dec 15 |
Keeping Good Records
The CRA requires you to keep all business records for at least 6 years from the end of the tax year they relate to. Good bookkeeping throughout the year makes filing far easier and protects you in an audit. Consider using accounting software or a spreadsheet to track income and expenses monthly.
Should You Incorporate?
Incorporation may make sense once your business income reaches a level where the tax savings justify the administrative costs. A Canadian-controlled private corporation (CCPC) pays a lower small business corporate tax rate on the first $500,000 of active business income. Consult a tax professional or accountant to determine whether incorporation is right for your situation.