Why do people incorporate their business in Ontario to save on taxes?
When you earn business income as a sole proprietor, every dollar is taxed at your personal marginal rate, which can exceed 50% in Ontario once federal and provincial rates are combined. A corporation is a separate legal person and pays tax at a much lower rate on active business income — the combined federal-provincial small business rate is significantly below the top personal rate.
The key benefit is tax deferral. Income left inside the corporation is taxed at the lower corporate rate. You only pay personal tax when you draw money out as a salary or dividend. This gap lets you accumulate funds inside the company and invest or reinvest them before they are personally taxed.
It is not a permanent tax escape — eventually most money comes out and you pay personal tax — but timing that extraction strategically can reduce your lifetime tax burden. Whether incorporation makes sense depends on your net income level, how much you reinvest, and your personal cash needs. A lawyer and accountant should review your situation together before you decide.
Key takeaways
- Corporate tax rates on active business income are well below top personal rates.
- Income retained in the corporation is only taxed personally when you withdraw it.
- Tax deferral, not permanent exemption, is the main advantage of incorporation.
- Professional advice is essential before incorporating solely for tax reasons.