“Should I incorporate?” is the most common question we get from Ontario freelancers, consultants, and small business owners. The correct answer is almost always “it depends on your income level and how much you need to withdraw.” Here's the math for three real income scenarios.
The Core Concept: Tax Deferral, Not Tax Elimination
Incorporating doesn't make income disappear. It creates a tax deferral: your corporation pays a lower rate on retained earnings now, and you pay personal tax when you eventually withdraw those earnings as salary or dividends. The benefit comes from the time value of money — the tax you don't pay today compounds inside your corporation.
Key insight: The incorporation benefit only materializes if you don't need all the money to live on. If you withdraw 100% of business profits personally, incorporation adds cost without adding savings.
The Three Scenarios
$50,000 Net Income
Federal + Ontario personal tax. No CPP on self-employment portion is separate.
Corp tax at ~11% on retained income. If you withdraw all $50K, personal tax applies — no savings.
At $50K, if you need all the money to live on, there's no deferral benefit. The $1,500–$3,000/year in extra accounting costs (T2, bookkeeping) wipe out any advantage. Exception: if you have other T4 income and don't need the business income, a corporation can defer tax.
$100,000 Net Income
Ontario top bracket kicks in. Self-employment CPP adds another ~$3,500.
CCPC small business rate ~9-12%. Pay yourself $50K salary/dividends and leave $50K in corp.
If you can leave ~$50K in the corporation, you defer ~$10,000 in personal tax annually. That $10K compounds inside the corp tax-free until withdrawn. Accounting costs of $2,500–$4,000/year are more than covered. The math works.
$150,000 Net Income
Ontario surtax and 43.41% marginal rate on income above $100K. CPP maxed.
Pay $80K salary (covers living), leave $70K in corp at ~11% corporate rate.
Annual tax deferral on $70K retained in corp: roughly $21,000 saved per year. Over 10 years, that's $200K+ of capital that stays working inside your corporation instead of going to CRA. Accounting costs are a rounding error at this income level.
Other Reasons to Incorporate (Beyond Tax)
- Liability protection
A corporation shields personal assets from business debts and lawsuits. A sole proprietor has no such shield.
- Credibility and contracts
Many enterprise clients and government contracts require or prefer dealing with an incorporated entity.
- Income splitting (careful)
With proper share structure, dividends can be paid to a spouse or adult children in lower tax brackets. TOSI rules (Tax on Split Income) limit this — talk to a CPA.
- Lifetime Capital Gains Exemption (LCGE)
If you sell a qualifying small business corporation, you may shelter up to $1.25M in capital gains. This exemption is only available to incorporated businesses.
- Retirement and exit planning
Retaining earnings inside a corporation and investing through a holding company builds a tax-sheltered investment portfolio.
The Hidden Costs of a Corporation
Don't forget to subtract these from any projected savings:
| Annual Cost | Estimated Range |
|---|---|
| T2 corporate tax return (CPA) | $800 – $2,500 |
| Bookkeeping (if outsourced) | $1,200 – $4,800/yr |
| Ontario Annual Return | $12/yr |
| Minute book updates | $200 – $500 as needed |
| Payroll setup (if paying salary) | $300 – $600 one-time |
For most small business owners at $100K+ net income, the annual accounting costs of $2,000–$5,000 are easily covered by the tax deferral. At $50K income where you need to withdraw everything, those costs make incorporation a net loss.
Quick Decision Framework
Get Your Personal Incorporation Analysis
Every situation is different. We'll model the actual tax impact for your income level, withdrawal needs, and business type — before you pay anything.