Sole Proprietor vs Corporation Canada: When to Incorporate
Every freelancer eventually hears "you should incorporate." Sometimes that is true. Sometimes it costs you more than it saves. Here is the real math and the decision framework.
Quick Answer
Incorporation saves tax through deferral — the corporation pays a low rate (roughly 11–15%) and you pay personal tax only when you withdraw money. This only helps if you can leave money in the corporation. If you need every dollar to live on, incorporation typically adds cost without benefit. The break-even point is usually around $50,000–$80,000 in net profit you do not need to withdraw.
How the tax works: sole proprietor vs corporation
As a sole proprietor, all net business income is taxed at your personal marginal rate in the year you earn it. In Ontario, for example, the top marginal rate hits 53.53% above $246,752. Even at $80,000 in net income, you are paying 31–40% on income tax alone.
As a corporation, the business pays corporate tax first — roughly 11–15% for a Canadian Controlled Private Corporation (CCPC) on the first $500,000 of active business income. You only pay personal tax when you take money out as salary or dividends. The difference between the corporate rate (say 12%) and your personal rate (say 40%) is money that stays invested inside the corporation, compounding without the personal tax hit.
The critical word is deferral. You will eventually pay personal tax when you withdraw. Incorporation does not eliminate the tax — it defers it, and lets the pre-personal-tax dollars compound in the meantime.
The deferral math by province (approximate)
| Province | Small business corp rate | Top personal rate | Max deferral |
|---|---|---|---|
| Ontario | ~12.2% | ~53.5% | ~41% |
| British Columbia | ~11% | ~53.5% | ~42% |
| Alberta | ~11% | ~48% | ~37% |
| Quebec | ~14% | ~53.3% | ~39% |
These rates apply only to the income you leave in the corporation. If you withdraw everything as salary, the combined corporate + personal tax approaches your marginal personal rate anyway — there is no deferral benefit.
What incorporation costs
Incorporation is not free. Typical annual costs over and above sole proprietor bookkeeping:
- Corporate tax return (T2): $1,500–$3,500 per year in additional accounting fees
- Annual corporate returns: provincial registration renewal ($20–$60/year depending on province)
- Initial incorporation: $300–$500 for federal or provincial incorporation
- Separate business bank account: monthly fees vary by bank
- Legal setup: shareholders agreement, minute book — $500–$2,000 one-time
At $50,000 in net income with a 40% personal rate and a 12% corporate rate, the tax deferral on $50,000 left in the corporation is about $14,000. That easily covers the extra costs. At $20,000 in net income where you need it all to live on, the deferral is zero and the costs just add overhead.
Legal protection — what it actually covers
A corporation is a separate legal entity. If your business is sued or goes into debt, the corporation's assets are at risk — not your personal assets (your home, savings, etc.). This can be significant for service businesses with professional liability exposure.
The protection has real limits:
- Personal guarantees: Banks almost always require them for business loans. If you sign a personal guarantee, the incorporation does not protect you for that debt.
- Director liability: Corporate directors are personally liable for unremitted HST, payroll deductions, and some other obligations.
- Professional liability: Some professions require personal professional insurance regardless of incorporation. Incorporation does not replace E&O coverage.
When to stay as a sole proprietor
- You need all of your income to cover personal expenses — there is nothing to leave in a corporation
- Your net income is below ~$50,000 and the extra accounting costs outweigh any deferral benefit
- You are in a startup phase with losses — losses are more useful personally (reducing your other income) than inside a corporation
- Your business is truly temporary — a one-year contract, a side project winding down
When to consider incorporating
- You are consistently earning $80,000+ in net profit and can leave a meaningful portion inside the corporation
- You want to build savings inside the company for future investment or eventual sale
- Your profession carries significant liability risk and incorporation provides meaningful additional protection
- You plan to bring on other owners or investors — a corporation makes equity sharing much cleaner
- You want to take advantage of the Lifetime Capital Gains Exemption (LCGE) if you ever sell the business
One thing that doesn't change
GST/HST registration and filing obligations are identical whether you are a sole proprietor or a corporation. Your business must register once taxable revenue exceeds $30,000, and you remit the same way regardless of legal structure.
This article is for informational purposes only and does not constitute tax or legal advice. The decision to incorporate has significant financial and legal implications — consult a qualified accountant and lawyer before proceeding.