Capital gains are arguably the most tax-friendly income stream a Canadian taxpayer has access to but of course are also easily the most misunderstood. It is common to hear the phrase capital gains and to believe it refers solely to the realm of seasoned investors or the ultra rich. In truth, a capital gain has an impact wherever an individual disposes of property that has experienced a time-of-sale (or alternatively, time-of-acquisition) increase in value – be it residential property (in certain instances), shares, mutual funds, a business, a cottage, or any other type of capital property. Being aware of exactly how this form of income is taxed, of what the legislation and rules actually say, and of where the opportunities for planning lie, is important information to have up front and not after – the fact.
A small business accountant in Toronto regularly helps clients navigate capital gains events, structure asset sales, and understand what will appear on their tax return — and when.
What Is a Capital Gain?
Gain is a profit made on sale of a capital property exceeding its adjusted cost base (ACB). The ACB is the amount you paid for the property including its cost, plus any relevant additions to cost and, deduct any returns of capital. When you sell for less than the ACB, there is indeed a capital gain.
If the proceeds of sale are less than the ACB, you will have a capital loss. Capital losses can be offset against any capital gains (for the last 3 years or any carry forward), but generally aren’t applied to other types of income.
The Inclusion Rate
A capital gain isn’t all taxable. Instead, there is a tax on a sum called an inclusion rate, which is included in your taxable income. Canada has traditionally had an inclusion rate of 50% on capital gains, meaning that only half of your gain is taxable and not leveraged for taxes. Recently there has been heavy debate as to whether this ratio will increase for gains over certain balances. As of the 2025 tax year, you will still be able to apply the 50% inclusion rate, but make sure to confirm this with a professional given the federal consultation.
Here’s a very simple example: you sell shares that you bought for $20,000 for $50,000, so you’ve realized a capital gain of $30,000. If the CG is included, then 50% of the capital gain, or $15,000 is added to your income. If your marginal rate is 43%, the tax you owe on the gain (assuming it is all taxable) is just over $6,400 – not $12,800. That’s why a capital gain is “better” (tax-wise) than most other sorts of income.
The Principal Residence Exemption
Your principal residence — the home where you ordinarily live — can be designated as such for the years you own it, sheltering any capital gain on the eventual sale from tax entirely. This is one of the most valuable exemptions in the entire Canadian tax code.
For families that own only one property, this is straightforward: sell the home, designate it as the principal residence for all years owned, and pay no tax on the gain. For families that own two properties — perhaps a home and a cottage — only one property can be designated as the principal residence for any given year. Choosing which property to designate for which years becomes a planning exercise when both properties have appreciated.
Some people incorrectly assume that all real estate gains are automatically tax-free. This is only true for a property properly designated as a principal residence for every year it was owned.
Capital Gains on Investments
When you hold shares, exchange-traded funds, or mutual funds in a non-registered account and sell them, any gain above your adjusted cost base is a taxable capital gain. Your ACB for shares includes the purchase price plus commissions paid. For mutual funds and ETFs held over many years, tracking the ACB accurately can be complex — particularly when dividends have been reinvested or there have been partial sales at different prices.
Many investors don’t realize that DRIP (dividend reinvestment plan) purchases also add to the ACB. If the ACB isn’t tracked carefully over the years, you may end up paying tax on the same amount twice — once when dividends were reinvested and taxed as income, and again when the full undifferentiated gain is calculated on the eventual sale.
For assets held inside a TFSA, there is no capital gains tax — all growth is completely sheltered. For assets inside an RRSP or RRIF, gains are not taxed as capital gains at all; when funds are withdrawn, the full amount is treated as ordinary income.
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Selling a Business
When a business owner sells the shares of a Canadian-controlled private corporation, any gain may qualify for the Lifetime Capital Gains Exemption (LCGE). This exemption allows eligible shareholders to shelter a substantial amount of gains from tax entirely — one of the most powerful single tax benefits in the Canadian code.
For the exemption to apply the corporation’s shares must be shares of a qualifying small business corporation when sold-this is, at the time of sale, at least 90 per cent of the assets must be used for an active business carried on in Canada. If the corporation has acquired large passive investments or is simply holding unused assets, it may no longer be a qualifying small business corporation at the time of sale, despite being one previously. Having plans, sometimes many years before the expected timing of a sale, is crucial to realizing this exemption.
Death and Capital Gains
When someone passes away, they are deemed to have disposed of all their capital property at fair market value immediately before death. This can trigger significant capital gains on the final tax return — particularly for long-held shares, real estate, or business interests. The estate doesn’t pay cash for this; it’s a paper transaction on the tax return. But the tax owing is real and must be paid.
Fortunately, sound estate planning (e.g. Spousal rollovers, charitable gifts and planning the ownership structure of your assets, and just comprehensive estate planning in general) can limit the capital gains tax triggered on death. This is definitely the one area in which your business owner – long-term financial advisor, accountant and estate lawyer partnership truly makes a difference.
In the hands of someone who takes some time to study. Capital gains tax in Canada is something that can be navigated. The tax benefits exist, there are real planning opportunities, and there is real downside to not knowing the rules.
Conclusion
To conclude, if a Canadian has any investment assets, property, business or other appreciation assets, it pays to learn about the capital gains tax beforehand! Capital gains are taxed more favourably than earned income from employment, but with rules on adjusting cost base and inclusion rates, principal residence exemption, reporting of investments & property and business sale, it is easy to pay much more tax than necessary. Planning in advance can go a long way in reducing tax owing, be it by understanding the rules of the system, managing gains & losses and asset location, claiming the lifetime capital gains exemption, tracking the cost of your investments or preparing on the sale of the family business for estate purposes.
Unfortunately by the time the sale or transfer has happened it is too late to do something about it! Proper advice or planning upfront can be the difference in saving thousands! If you need professional advice on a capital gains tax planning challenge, investment reporting or business sale, WebTaxOnline can help you find the most tax-efficient solution while remaining compliant with all tax reporting obligations.
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