Tax
The revenue number everyone quotes is the wrong trigger. Three other things matter more.
There is a persistent rule of thumb about a revenue threshold. It is a poor guide, because incorporation is not primarily a tax decision at the point most founders face it.
Incorporation brings a corporate tax return, separate books, payroll if you take salary, annual filings, and a real chance of professional fees several times what a personal return costs. There is also a loss of flexibility: business losses in a corporation cannot offset your personal income, which matters in the early, loss-making years.
The overlooked sequencing point
Early losses are often more valuable against personal income than carried forward in a corporation. Incorporating the moment you have an idea can waste them.
For most Ontario founders operating in one province, a provincial incorporation is simpler and cheaper. Federal incorporation makes sense for name protection across Canada and for businesses operating in several provinces, and it carries extra-provincial registration obligations.
General information for Canadian founders, current to 2026. It is not tax advice and does not account for your specific facts. Rates, thresholds and rules change, confirm the current figures before acting.
A short call is usually enough to tell you whether there is anything here worth acting on.