A sole proprietorship is a business owned by one individual. It is a common starting point for consultants, tradespeople and side hustles because the business income is reported on the owner's personal tax return rather than a separate corporate T2 return.
Registration and tax obligations depend on the name you use, the work you do and whether you need GST/HST, payroll or special permits.
Step 1: Decide whether sole proprietorship fits
You keep control and generally have less formal corporate administration. But legally the business is not a separate corporation, so personal liability can be an important consideration. Insurance and contracts can matter as much as tax.
Example: a graphic designer earning $20,000 on evenings and weekends may begin as a sole proprietor; that does not mean every profession or higher-risk project should use the same structure.
Step 2: Choose your operating name
If operating under a name other than your own legal name, check Ontario registration requirements and search for conflicts. A business-name registration does not give exclusive rights equivalent to a trademark.
Save the confirmation, registry documents and expiry or renewal reminders.
Step 3: Register and review licences
Use Ontario's official registry workflow where registration is required. Depending on municipality and industry, you may need permits, professional registrations or insurance.
A federal CRA business number, Ontario name registration and local permit are different documents. Do not assume that completing one automatically completes the others.
Step 4: Set up tax and accounting
A sole proprietor usually reports business revenue and eligible expenses on Form T2125 with their T1. Consider GST/HST registration under the $30,000 taxable-revenue test; ride-share drivers face special rules. If you hire an employee, open and manage payroll accounts.
Set aside money for income tax and both portions of self-employed CPP, where applicable. Keep business transactions in a separate account for cleaner records even where the law does not strictly require it.
Step 5: Track the first month
Create numbered invoices, store receipts, record gross sales and merchant fees separately, and maintain a mileage log if using a personal vehicle. Review cash and taxes monthly.
Revisit incorporation once profit, risk, ownership and administrative needs justify the extra cost, not merely because the business has its first client.
Sources and further reading
General educational content only. Verify current CRA and provincial guidance before acting.