Section 7 Income Tax Act: Stock Option Benefits, Deductions, and ACB

Section 7 of Canada’s Income Tax Act sets the rules for taxing employee stock options. It treats the difference between what you pay for shares under an option and what those shares are worth as employment income, not a capital gain. When that income hits your return, and whether it qualifies for a 50% deduction, depends on the kind of company that granted the option.

How the Taxable Benefit Is Calculated

Paragraph 7(1)(a) treats any gain from exercising an employment stock option as a benefit received because of your job. If your employer (or a related entity) agreed to sell or issue shares to you and you later acquire those shares at a price below their market value, the difference is added to your income for that year, the same way a bonus or salary would be.¹

The math is straightforward. Your taxable benefit equals the fair market value of the shares at the moment you acquire them, minus the exercise price you paid, minus any amount you paid up front for the option right itself.¹ If your option lets you buy shares at $10 each, you paid nothing for the option, and the shares are worth $25 when you exercise, your taxable benefit is $15 per share.

The provision uses the term “qualifying person” to describe the entity granting the options, which covers corporations and mutual fund trusts.² The trigger is the employment relationship: if the option exists because of your work, Section 7 applies.

When You Pay Tax on the Benefit

Timing depends on the type of employer, and this is the single biggest structural difference in the rules.

Public Companies and Mutual Fund Trusts

If you work for a publicly traded company or a mutual fund trust, the benefit is included in your income for the year you exercise the option and acquire the shares.¹ You owe tax on the spread immediately, whether you sell the shares or hold them.

This creates a real cash-flow problem for employees who exercise and keep the shares. Your tax liability is fixed at the value on the exercise date. If the share price drops afterward, you still owe tax on the higher amount.

Canadian-Controlled Private Corporations

Employees of a CCPC get more favorable timing under subsection 7(1.1). The taxable benefit is deferred until you actually sell or otherwise dispose of the shares.¹ The benefit is still measured using the fair market value at the time you exercised, but the income inclusion waits until you part with the shares. Because private company shares are often illiquid, this deferral can last years.

The 50% Stock Option Deduction

The employment benefit under Section 7 is taxed as ordinary income, but paragraph 110(1)(d) provides a deduction equal to half the benefit for qualifying options. That brings the effective tax rate on the benefit roughly in line with the capital gains inclusion rate, which remains at 50%.³

Three conditions must all be met to claim the deduction:⁴

The exercise price per share can’t be less than the fair market value of the shares when the option agreement was made (reduced by any amount you paid for the option right itself).
The shares must be prescribed shares, which generally means ordinary common shares without special redemption or conversion features.
At the time the option agreement was made, you must have been dealing at arm’s length with the employer and any related qualifying persons.

A Separate Path for CCPC Employees

CCPC employees have their own route to the same 50% deduction under paragraph 110(1)(d.1), with notably different conditions. You don’t need the exercise price to match the grant-date fair market value. Instead, you must hold the shares for at least two years after acquiring them, and you can’t have already claimed the deduction under paragraph 110(1)(d) for the same benefit.⁴

This matters because CCPC option grants often use exercise prices below fair market value, which would disqualify them under the standard 110(1)(d) route. Combined with the deferral under subsection 7(1.1), CCPC employees can defer the tax and still receive the half-rate deduction.

The $200,000 Vesting Cap for Larger Employers

For options granted after June 2021, the deduction under paragraph 110(1)(d) is subject to an annual vesting limit of $200,000 under subsection 110(1.31). The cap applies to employees of non-CCPC employers that are not smaller employers, meaning employers with consolidated annual gross revenues above $500 million.³

The limit is measured by the fair market value of the shares underlying options that vest in a single calendar year. If $400,000 worth of shares vest in one year, only the first $200,000 qualifies for the 50% deduction; the remainder is fully taxable as employment income. CCPC employees and employees of smaller companies are exempt.

Your Adjusted Cost Base After Exercise

Once you’ve exercised and paid tax on the employment benefit, your adjusted cost base (ACB) for those shares equals the fair market value at the time of exercise. The ACB combines the exercise price you paid and the employment benefit you reported. Using the earlier numbers: $10 paid plus a $15 benefit reported as income gives an ACB of $25.

This prevents double taxation. When you eventually sell, only the gain above $25 is a capital gain, and a sale below $25 produces a capital loss. Getting this number right matters because the CRA won’t track it for you, and it becomes harder to reconstruct if you hold shares from multiple grants with different exercise dates.

What Your Employer Withholds

Subsection 153(1.01) treats stock option benefits as bonus remuneration for withholding purposes, with three carve-outs: the portion deductible under paragraph 110(1)(d), benefits deferred under the CCPC rules in subsection 7(1.1), and amounts qualifying for the charitable donation deduction under paragraph 110(1)(d.01).⁵ In practice:

A CCPC employer doesn’t withhold income tax, CPP, or EI on the stock option benefit, because the tax is deferred until the shares are sold.
A non-CCPC employer must withhold income tax and CPP contributions. If you qualify for the 110(1)(d) deduction, the employer can reduce withholding by the deductible portion. EI is not withheld on non-cash benefits.
When an option is settled in cash rather than shares, income tax, CPP, and EI all apply.³

Donating Shares Acquired Through Options

If you donate qualifying securities to a registered charity within 30 days of acquiring them through a stock option, paragraph 110(1)(d.01) provides an additional deduction equal to half the benefit. Combined with the regular 110(1)(d) deduction, this can eliminate the employment income inclusion entirely. The shares must be listed securities, and you must first qualify for the regular deduction under 110(1)(d).⁴ The 30-day window is strict.

Unexercised Options at Death

Paragraph 7(1)(e) addresses what happens when an employee dies holding unexercised options. A benefit is deemed to have been received in the year of death, equal to the value of the option right immediately after death, minus any amount the employee paid to acquire that right.¹ The 110(1)(d) deduction can still apply if the conditions are met and the securities are acquired within the first three taxation years of the employee’s graduated rate estate.⁴

Option Exchanges in Corporate Reorganizations

Subsection 7(1.4) provides rollover treatment when stock options are exchanged for new options during a corporate reorganization, amalgamation, or similar transaction. If you receive new options in exchange for old ones with no other consideration, and the in-the-money value of the new options doesn’t exceed that of the old ones, no taxable event occurs. The new option is treated as a continuation of the original for all Section 7 purposes.¹

A parallel rule under subsection 7(1.5) applies when CCPC shares acquired under deferred-tax options are exchanged for new securities in a reorganization. The new securities step into the shoes of the old ones, preserving the deferral under subsection 7(1.1).¹

1
Justice Laws Website. Income Tax Act
2
Canada.ca. ARCHIVED – Benefits to Employees – Stock Options
3
Canada.ca. Employee Security (Stock) Options
4
Justice Laws Website. Income Tax Act – Section 110
5
Justice Laws Website. Income Tax Act – Section 153