Incorporation is sold as a milestone. It is really a tax-deferral tool with meaningful fixed costs, and it only starts paying for itself at a certain point.
What incorporation actually gives you
The main benefit is deferral, not savings. A Canadian-controlled private corporation pays a low rate on active business income up to the small business limit. But that advantage only exists on income you leave in the company. Money you take out to live on gets taxed personally on the way out, and the combined result is roughly what you would have paid as a sole proprietor.
This is called integration, and it works well enough that if you spend everything the business earns, incorporating saves you approximately nothing.
The costs nobody leads with
- A corporate return every year, whether or not the company did anything
- Year-end financial statements
- A separate bank account, separate books, and a payroll or dividend mechanism to pay yourself
- Annual corporate filings with Alberta Corporate Registry or the federal registry
- A separate provincial corporate return each year, on top of the federal one — Alberta is one of only two provinces that collects its own
Together these are a recurring annual cost that a sole proprietorship does not carry.
The rough test
Incorporation tends to make sense when you are consistently earning more than you need to live on, and the surplus is large enough that deferring tax on it outweighs the annual cost of maintaining the corporation. Where that line falls depends on your province and your personal spending — it is arithmetic, not a rule of thumb.
The non-tax reasons that are often better reasons
Limited liability matters in some sectors and is nearly irrelevant in others. Some clients simply will not contract with an unincorporated supplier. And if you intend to sell the business, the lifetime capital gains exemption on qualified small business corporation shares is a large enough number to change the plan on its own.
Those reasons are legitimate. "It saves tax" usually is not, at least not yet.
Incorporating is a decision worth taking advice on before you act, not after. If you are weighing it, get someone to run the arithmetic against your actual numbers.
General information only, current at the date of publication. Tax rules and CRA positions change. This is not advice for your circumstances.