Tax
The account you meant to clean up later can become taxable personal income for a year that is already closed.
It starts innocently. The company pays a personal expense. You take money out mid-year and plan to characterize it at year end. The shareholder loan account drifts. Then it does not get repaid, and the rule applies.
Broadly: if you borrow from your corporation and the balance is still outstanding at the end of the corporation's next fiscal year end, the full amount can be included in your personal income for the year you took it. Not the year it was assessed, the year you took it. Interest and penalties follow.
The part that stings
The corporation does not get a deduction. You are taxed personally on money that was already taxed at the corporate level. It is one of the few genuinely punitive outcomes in the system, and it is entirely avoidable.
Even where the loan is permitted, an interest-free or low-interest balance creates a taxable benefit calculated at the prescribed rate. Paying actual interest to the corporation within thirty days of year end eliminates it.
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.