If you have sold an investment, a property, or any other asset for more than you paid for it, you have likely realized a capital gain, and you may owe tax on it. Capital gains are one of the most common tax events Canadians encounter outside of employment income, yet many people are unsure exactly how they work.
At Cassar CPA, we work with small business owners, investors, and professionals across the Greater Toronto Area who regularly deal with capital gains from selling real estate, investments, or business assets. This article explains what a capital gain is, how it is taxed in Canada, and the key strategies for managing your tax exposure.
Capital Gains and Capital Losses: The Basics
A capital gain occurs when you sell a capital asset for more than its adjusted cost base (ACB). Your ACB is generally the original purchase price plus any costs directly related to acquiring the asset, such as legal fees, commissions, or transfer taxes. A capital loss is the opposite, when you sell for less than your ACB.
Capital assets include stocks, bonds, mutual funds, ETFs, real estate (other than your principal residence, which has its own exemption), business assets, and other property. Essentially, anything you own for investment or long-term use, outside of inventory or property held for resale, is generally considered a capital asset.
You report capital gains and losses on Schedule 3 of your personal tax return for the year the asset was sold. The key point to understand is that a capital gain is not taxed in full, only a portion of it is included in your taxable income.
The 50% Inclusion Rate
In Canada, only 50% of a capital gain is included in your taxable income. This is called the inclusion rate. The included portion, known as the taxable capital gain, is then taxed at your marginal income tax rate, just like employment or business income.
For example, if you sell shares for a $40,000 capital gain, the taxable portion is $20,000 (50% of $40,000). If your combined federal and Ontario marginal rate is 43.41%, the tax on that gain would be approximately $8,682. The remaining $20,000 is not taxed.
A note on recent changes: The federal government proposed increasing the inclusion rate to 66.67% for capital gains above $250,000 (for individuals) and on all gains for corporations and trusts. This proposal was deferred from June 2024 to January 2026, and then cancelled entirely by Prime Minister Carney on March 21, 2025. The inclusion rate remains at 50% for 2025 and 2026.
The Principal Residence Exemption
The most significant capital gains exemption for most Canadians is the principal residence exemption (PRE). When you sell your home, the gain is generally tax-free, provided you designate the property as your principal residence for each year you owned it. However, since 2016, you must report the sale on Schedule 3 of your tax return, even if the gain is fully exempt.
You can only designate one property per year as your principal residence per family unit. If you own both a home and a cottage, for example, you will need to determine which property to designate for each year of ownership to minimize the overall tax. This is an area where professional advice can make a meaningful difference.
Using Capital Losses to Offset Gains
Capital losses can only be applied against capital gains, not against other types of income such as employment or business income (with limited exceptions in the year of death). If your capital losses exceed your capital gains in a given year, the net capital loss can be carried back three years or carried forward indefinitely to offset capital gains in other years.
This creates a planning opportunity. If you are expecting a significant capital gain, for example, from selling a rental property or business shares, you may want to review your investment portfolio for unrealized losses that could be triggered in the same year to reduce the taxable gain. This is sometimes called tax-loss harvesting, and timing matters.
Strategies to Minimize Capital Gains Tax
Use tax-sheltered accounts. Investments held inside a TFSA grow and are withdrawn completely tax-free, no capital gains tax applies. Investments inside an RRSP or FHSA grow tax-deferred, though withdrawals are taxed as ordinary income. Maximizing contributions to these accounts before investing in non-registered accounts is generally the most effective first step.
Time your dispositions. If you can control when you sell an asset, consider the tax year in which the gain will be reported. Selling in a year when your other income is lower means a lower marginal rate on the gain.
Harvest losses strategically. As noted above, triggering capital losses in the same year as a large capital gain can significantly reduce your tax bill. Be aware of the superficial loss rule: if you repurchase the same or identical property within 30 days before or after the sale, the CRA will deny the loss.
Claim all eligible costs in your ACB. Many taxpayers forget to include commissions, legal fees, and other acquisition costs in their adjusted cost base. A higher ACB means a lower capital gain. Keep detailed records of all costs associated with purchasing and improving your capital assets.
Capital Gains for Business Owners
If you own a Canadian-controlled private corporation (CCPC), capital gains realized inside the corporation are taxed differently than personal gains. The taxable portion is subject to the corporate investment income rate (approximately 50.17% in Ontario), though a significant portion is refundable when dividends are paid. The non-taxable 50% of the gain is added to the corporation’s Capital Dividend Account and can be distributed to shareholders tax-free.
Business owners selling qualified small business corporation shares may also be eligible for the Lifetime Capital Gains Exemption (LCGE), which shelters up to $1,250,000 of capital gains from tax. The LCGE is indexed to inflation starting in 2026. If you are planning a business sale, this exemption, combined with careful timing and structure, can produce significant tax savings.
How Cassar CPA Can Help
Capital gains arise from some of the most significant financial events in your life, selling a home, exiting a business, or liquidating an investment portfolio. At Cassar CPA, our founder Matt Cassar has helped hundreds of clients across Toronto and Oakville navigate these transactions with a clear understanding of the tax implications before they act.