Choosing a business structure is one of the first decisions a Canadian entrepreneur makes — and one of the most consequential. Here’s a direct comparison to cut through the confusion.
Sole Proprietorship: The Quick Start
A sole proprietorship is the default for most new businesses. There’s no formal registration beyond a business name (if you’re not using your own name), and income flows directly to your personal tax return.
Advantages:
- Simple to set up — as little as $60 in Ontario to register a business name
- No separate corporate tax return — one personal return covers everything
- Losses in the business can offset other personal income
- Easy to wind down
Disadvantages:
- No liability protection — your personal assets are at risk if the business is sued or has debts
- All business income taxed at your personal rate (up to 53.53% in Ontario at the top bracket)
- Harder to bring in investors or partners
- Less credibility with some larger clients
Corporation: The Growth Vehicle
Incorporating creates a separate legal entity. The business has its own assets, liabilities, tax obligations, and legal standing.
Advantages:
- Limited liability — personal assets generally protected from business debts
- Small Business Deduction: the first $500,000 of active business income taxed at ~12.2% in Ontario (vs. up to 53.53% personally)
- Income splitting opportunities (in some cases, through paying dividends to family members who are shareholders)
- Retained earnings can stay in the corporation and be invested at the lower corporate rate
- Easier to bring in co-founders, investors, or sell the business
Disadvantages:
- Higher setup cost: $1,000-$2,500 for federal or provincial incorporation
- Annual corporate tax return (additional accounting fees: $1,500-$5,000/year)
- More administrative overhead — minutes, resolutions, separate banking
- Business losses cannot directly offset personal income
The Decision Framework
Use this as a starting point:
- Start as sole proprietor if: You’re testing an idea, revenue is under $50,000/year, risk of liability is low, and you want simplicity
- Incorporate when: You’re consistently earning more than $50,000-$80,000/year in business income, you want liability protection, or you’re building something to scale or sell
The tax math typically favours incorporation once you’re leaving meaningful profit in the business — the ~40 percentage point difference in tax rates on retained earnings can be substantial.
Talk to a Canadian accountant before making the switch. The right timing depends on your specific situation, and a one-hour consultation ($200-$400) is money well spent before making a structural decision that affects everything downstream.
