Exercise of option
If the employee exercises the option and acquires the underlying shares, the employee will include in employment income a benefit equal to the difference between the option exercise price and the fair market value of the shares when they are acquired.
The timing of the inclusion will depend on whether the employer corporation is a Canadian-controlled private corporation (CCPC) or not. If it is not a CCPC, the benefit is included in income in the year in which the shares are acquired. If it is a CCPC, the benefit is included in the year in which the employee sells the shares. In other words, the CCPC stock option provides a potential deferral for the employee. (This recognizes that the market value of shares in a CCPC is usually unknown until shares can actually be sold. For shares of a public company, in contrast, the value can easily be determined.)
The amount of the benefit is added to adjusted cost base of the shares for capital gain / capital loss purposes, so as to prevent double taxation.
One-half deduction
In most cases, if you exercise an employee stock option, you will be allowed a deduction of one-half of the benefit in computing your taxable income. In other words, similar to capital gains, in most cases only one-half of employee stock option benefits are subject to tax.
You are allowed the one-half deduction in either of the following two scenarios.
First, you get the deduction if:
- The option exercise price was not less than the fair market value of the shares when the option was granted (in colloquial terms, the option was not “in the money” when it was granted to you);
- The shares were common shares (or prescribed shares with similar characteristics to common shares); and
- You deal at arm’s length with the employer.
Alternatively, you can get the deduction if the employer is a CCPC and you hold on to the shares for at least two years before selling them.