Capital Gains Tax in Canada: What Small Business Owners and Investors Need to Know
Ottawa CPA Majdi Ibrahim explains capital gains tax in Canada, including ACB, principal residence rules, LCGE, corporations, and tax-loss selling.
By Majdi Ibrahim, CPA | Majdi Ibrahim, CPA Professional Corporation | Ottawa, Ontario
Capital gains tax is one of those topics that feels abstract until it isn't — until you sell a property, dispose of investments, wind down a corporation, or receive an inheritance with appreciated assets attached to it. At that point, the numbers tend to be large and the decisions have already been made.
Understanding how capital gains work before that moment is one of the most practical things a business owner or investor can do. This article covers the mechanics, the key planning opportunities, the situations specific to small business owners, and the areas where the rules are more nuanced than people typically realize.
At a Glance
A capital gain arises when you sell (or are deemed to sell) a capital property for more than its Adjusted Cost Base. The taxable portion of that gain is included in your income for the year.
The capital gains inclusion rate is currently 50%. Half of a capital gain is included in taxable income — not the full gain. This applies to individuals, corporations, and most trusts.
A proposed increase to the inclusion rate was announced, deferred, and then cancelled. The rate remains at 50%. Confirm the current rate before any major transaction, because older articles and online summaries may reflect the cancelled proposal rather than the current rules.
The Lifetime Capital Gains Exemption (LCGE) can shelter significant gains on qualifying small business shares and qualifying farm or fishing property — currently $1.25 million under proposed changes that the government intends to maintain. Confirm the current enacted amount before relying on it for a transaction.
Principal residence exemption can eliminate the capital gain on your home — but the sale must be reported, and the exemption doesn't apply automatically to every property.
Deemed dispositions happen without an actual sale. Death, emigration, change in use of a property, and certain corporate transactions can all trigger capital gains without a cheque changing hands.
Why You May Have Heard About a Two-Thirds Inclusion Rate
Before getting into the mechanics, it's worth clearing up a significant source of confusion.
In Budget 2024, the federal government proposed increasing the capital gains inclusion rate from 50% to 66.67%. The effective date was initially June 25, 2024, then deferred to January 1, 2026, and then — on March 21, 2025 — the federal government announced it would cancel the proposed increase entirely.
The inclusion rate remains at 50%. The proposed two-thirds rate never became law.
The reason this matters: a large number of articles, planning guides, and online calculators published between June 2024 and early 2025 reflect the proposed (and ultimately cancelled) rules. If you've seen references to "two-thirds inclusion" or "gains above $250,000 taxed at a higher rate," that material is now outdated. Confirm the current rate before any significant planning or transaction.
The Basic Mechanics
What Is a Capital Gain?
A capital gain arises when you sell — or are deemed to sell — a capital property for more than its Adjusted Cost Base (ACB). The ACB is generally what you paid for the property, plus any costs of acquisition (legal fees, commissions) and, for certain assets, subsequent improvements.
Capital gain = Proceeds of disposition − Adjusted Cost Base − Selling costs
If the result is positive, you have a capital gain. If negative, you have a capital loss.
What Is the Inclusion Rate?
Not all of a capital gain is taxable — only the taxable capital gain, which is the gain multiplied by the inclusion rate.
The current inclusion rate is 50% for individuals, corporations, and most trusts. Half the gain is included in taxable income; the other half is not taxed.
A simple example: If you sell investments for a $100,000 capital gain, generally $50,000 is included in your taxable income. If your marginal tax rate is 40%, the approximate tax on that gain would be $20,000. This is simplified — it ignores provincial differences, capital losses, available exemptions, the alternative minimum tax, and other adjustments — but it illustrates the basic mechanics.
What Is the Tax Rate on a Capital Gain?
Capital gains are not taxed at a special "capital gains rate" — they're taxed at your marginal rate, but only on the included portion. For an Ontario resident at the top marginal rate (53.53%), the effective rate on a capital gain is approximately 26.77% (50% inclusion × 53.53% marginal rate). The effective rate is lower than on employment income precisely because only half the gain is included. For corporations, the applicable corporate tax rate applies to the included portion.
Capital Losses
Capital losses can only be applied against capital gains — they generally can't offset employment income or business income. If you have more capital losses than gains in a year, the excess can be carried back 3 years to offset capital gains in those years, or carried forward indefinitely to offset future capital gains.
Special rules apply for personal-use property, listed personal property, depreciable property, and allowable business investment losses. An Allowable Business Investment Loss (ABIL) — a loss on shares or debt of a qualifying small business corporation — is treated differently from an ordinary capital loss and may be deductible against other income if the conditions are met. This is narrow and should be reviewed carefully with a CPA.
Adjusted Cost Base: Getting It Right Matters
The ACB is often the most important number in a capital gains calculation — and the most frequently miscalculated.
For shares: The ACB is generally the total amount paid for the shares, including commissions. If you've bought the same shares multiple times, the ACB is the average cost per share across all purchases. Tracking this carefully over years of investing — or receiving employee stock options, or having distributions reinvested — is important because errors in ACB translate directly into overstated or understated capital gains.
For real estate: The ACB starts with the purchase price, plus legal fees and other closing costs. It's increased by the cost of capital improvements over time. Repairs don't increase ACB; capital improvements do.
For inherited property: The ACB of inherited property is generally the fair market value at the time of the deceased's death. This "stepped-up" ACB can significantly reduce the capital gain when the inherited property is eventually sold.
Common ACB mistakes:
- Forgetting to include acquisition costs (legal fees, commissions)
- Not tracking capital improvements on real estate
- Ignoring return-of-capital distributions that reduce ACB on investment funds
- Not tracking ACB across multiple purchases of the same investment
The Principal Residence Exemption
The principal residence exemption (PRE) is one of the most valuable tax shelters available to Canadian individuals — it can eliminate the capital gain on the sale of a home entirely.
How it works: Each year you own the property and designate it as your principal residence, the gain for that year is sheltered. The formula includes an additional "+1 year" buffer, which means if you've designated the property for all years of ownership, the full gain is generally eliminated.
Reporting is required. Since 2016, the sale of a principal residence must be reported to CRA — typically on Schedule 3 of your T1 and, where required, Form T2091. CRA can deny the exemption if the sale isn't properly reported, even if it would otherwise have been available. In some cases, late reporting can still be corrected, but penalties may apply and the exemption should not be treated as automatic.
What qualifies: A property qualifies as a principal residence for a given year if it's a housing unit (house, condo, cottage, mobile home), you or your spouse/common-law partner or child ordinarily inhabited it during the year, and you designate it as your principal residence for that year.
One property per family unit per year. A family unit can only designate one property as a principal residence for any given year. If you own two qualifying properties (a house and a cottage), you need to choose which one to designate each year — and the strategic allocation of those years matters when you eventually sell.
Partial rental use and business use can complicate the exemption. If you've rented out part of your home or used part of it exclusively for business, the full gain may not be sheltered. The PRE is not automatic just because a property was "your home."
Change-in-use rules: If a property shifts from personal use to rental use (or vice versa), a deemed disposition at fair market value may be triggered. Elections are available to defer this in some circumstances.
Capital Gains for Small Business Owners: The LCGE
The Lifetime Capital Gains Exemption (LCGE) is one of the most significant tax incentives available to Canadian small business owners — it allows individuals to shelter a substantial capital gain on the disposition of qualifying property from tax.
What Qualifies
Qualified Small Business Corporation (QSBC) shares: Shares of a Canadian-Controlled Private Corporation where:
- At the time of sale, at least 90% of the fair market value of the corporation's assets is used in an active business carried on in Canada
- Throughout the 24 months before the sale, more than 50% of the fair market value of assets was used in an active business
- Generally, throughout the 24 months before the sale, the shares must not have been owned by anyone other than the individual or a person or partnership related to the individual
Qualified farm or fishing property also qualifies for the LCGE, often at a higher exemption amount.
The Exemption Amount
CRA currently refers to a proposed increase to the LCGE to $1.25 million for dispositions after June 24, 2024. Because the legislative status and indexing details have been moving, confirm the enacted limit before relying on it for a transaction.
The Purification Requirement
Meeting the 90%/50% asset tests often requires purification — ensuring the corporation's balance sheet is predominantly active business assets rather than passive investments (cash, investment portfolios, personal-use assets).
The 50% test applies throughout the entire 24-month period before sale, while the 90% test applies at the time of sale. Purification needs to be planned carefully: some cleanup steps may help satisfy the 90% test at closing, but last-minute changes generally won't resolve a failure of the 24-month test. Early planning — well ahead of any anticipated sale — is significantly more effective than trying to fix things at the last moment.
The Cumulative Net Investment Loss (CNIL) Account
The LCGE is reduced by the taxpayer's Cumulative Net Investment Loss (CNIL) — accumulated investment expenses in excess of investment income over the taxpayer's lifetime. If you've been deducting significant investment interest, your effective LCGE may be lower than the nominal limit.
Capital Gains Reserve: When You're Paid Over Time
If you sell a capital property and receive the proceeds over more than one year — common in vendor take-back arrangements, installment sales, and some business sales — a capital gains reserve may allow part of the gain to be deferred.
Generally, at least 20% of the gain must be brought into income each year, meaning the maximum reserve period is five years. Special rules can allow a reserve over up to 10 years in specific cases, including certain transfers to children of family farm or fishing property, certain QSBC share transfers, qualifying business transfers, and intergenerational business transfers.
The reserve is a useful planning tool for sellers who don't receive all their proceeds immediately — it aligns the tax recognition with the cash flow from the sale.
Capital Gains in a Corporation
Capital gains realized inside a corporation are taxed at the corporate level — and the mechanics have some useful planning features worth understanding.
The inclusion rate is 50%. Generally, 50% of a capital gain realized in a corporation is taxable at the applicable corporate rate.
The Capital Dividend Account (CDA). When a corporation realizes a capital gain, the non-taxable portion flows into the Capital Dividend Account. The CDA allows the corporation to pay a capital dividend — a dividend that is completely tax-free to the shareholder. Capital dividends are not automatic; the corporation must file a proper election before paying one. This is one of the most tax-efficient ways to move money from a corporation to an individual.
Refundable tax. Aggregate investment income in a CCPC — including the taxable portion of capital gains — is subject to additional refundable tax that is partially returned when taxable dividends are paid out to shareholders. This is part of the integration mechanism for passive income.
Integration applies here too. The combined corporate and personal tax on capital gains flowing through a corporation is designed to be roughly equivalent to personal tax on gains realized directly. Whether realizing a gain inside a corporation is better than doing so personally depends on tax rates, the CDA balance, refundable tax mechanics, shareholder needs, and long-term planning — don't assume a corporation is always the better vehicle for passive investments or capital gains.
Deemed Dispositions: When Capital Gains Happen Without a Sale
One of the most commonly misunderstood aspects of capital gains tax is that a sale isn't always required to trigger a gain.
Death. When someone dies, they are deemed to have disposed of all their capital property at fair market value immediately before death. The resulting capital gains are reported on the final T1. Certain rollovers — including transfers to a surviving spouse or spousal trust — can defer the gain, but the deferral eventually ends when the surviving spouse disposes of the assets.
Change in use. Converting a property from personal use to income-producing use triggers a deemed disposition at fair market value. Elections are available to defer this in some circumstances.
Emigration. When a Canadian resident becomes a non-resident, they are generally deemed to have disposed of most capital property at fair market value — potentially triggering a significant "departure tax."
Transfers to non-arm's-length parties. Gifting property to a child, or selling below fair market value to a related party, generally triggers a deemed disposition at fair market value. The tax applies as if you received FMV, even if you didn't.
Corporate reorganizations. Certain corporate transactions can trigger deemed dispositions unless specific rollover provisions apply — including Section 85 elections and other reorganization provisions under the Income Tax Act.
Tax-Loss Selling and Superficial Loss Rules
Tax-loss selling — deliberately selling investments at a loss to offset realized gains — is a legitimate planning strategy, especially near year-end. But the superficial loss rules limit its effectiveness when investments are repurchased too quickly.
If you sell an investment at a loss and you (or an affiliated person) repurchases the same or identical property within 30 days before or after the sale, the loss is a "superficial loss" — it's denied and generally added to the ACB of the repurchased property. Affiliated persons can include a spouse, certain corporations controlled by the taxpayer, and certain registered accounts, depending on the facts. The denied loss isn't gone permanently — it's deferred.
To avoid the superficial loss rule, you need to either wait 30 days before repurchasing, or purchase a similar but not identical investment. Whether a substitute investment is truly "not identical" is a facts-based question and should be reviewed carefully.
We cover year-end timing for tax-loss selling in our year-end checklist article.
What CRA Watches: Capital Gains Compliance Areas
Real estate dispositions and principal residence reporting. Every disposition of real property must be reported — including sales where the full gain is sheltered by the PRE. CRA reviews principal residence designations, particularly on properties with limited personal-use history.
Property flipping. CRA distinguishes between capital gains (50% inclusion) and business income (100% inclusion) on property transactions. Frequent buy-and-sell activity with a primary profit motive may be characterized as business income. Canada has also introduced specific rules treating gains on properties held less than 365 days as business income in most cases.
Cryptocurrency and digital asset dispositions. Crypto and digital-asset transactions may be on capital account or income account depending on the facts. ACB tracking for crypto is often poorly done and is an area of active compliance focus.
Missing or incorrect ACB records. Under-reported gains from incorrect ACB tracking are a common compliance issue — particularly for investors who've held assets for many years across multiple accounts.
Non-arm's-length transactions. Transfers between related parties at below-FMV prices are subject to review, and CRA can reassess to impute FMV proceeds.
Shareholder and corporate transactions. Corporate reorganizations, share transfers, and certain dividend-in-kind payments can trigger capital gains consequences if not properly structured.
Foreign property. Individuals owning foreign property with a cost exceeding $100,000 may be required to file a T1135 (Foreign Income Verification Statement) — and dispositions of foreign property are subject to Canadian capital gains rules even if the asset is held abroad.
Ottawa & Area: Practical Capital Gains Situations
Government employees with investments and property. Federal public servants who've built up significant investment portfolios or real estate equity over a career often face concentrated capital gains exposure at retirement or career transition. Understanding the interaction of pension income, ACB, and capital gains planning is worth addressing before, not after, major asset dispositions.
Technology sector equity. Ottawa has a significant tech community, and employees and founders often hold employee stock options or founder shares. The tax treatment of employee stock options is a distinct topic that intersects with capital gains planning and is worth a dedicated conversation if you hold material equity in an employer or early-stage company.
Rental properties and accumulated appreciation. With Ottawa's real estate market appreciation over recent years, many landlords are sitting on significant unrealized gains. The interaction between CCA claimed over the years (recapture on sale), capital improvements made (ACB additions), the principal residence exemption, and the eventual capital gain deserves careful planning before a sale decision is made, not after it.
What Happens When You Bring This to Majdi Ibrahim, CPA?
ACB reconstruction and tracking. If you've held investments or real estate for years without carefully tracking the ACB, we can help reconstruct it — preventing both overpayment of tax and compliance issues from understated gains.
LCGE planning. If you're approaching a business sale, we can assess whether your shares qualify for the LCGE and what purification steps — if any — are needed, with enough lead time to actually implement them.
Deemed disposition planning. Whether it's estate planning, a change in property use, or a corporate reorganization, we flag the deemed disposition triggers and the rollover options before they become surprises.
Year-end capital gains strategy. Timing the realization of gains and losses, coordinating with RRSP contributions, using the Capital Dividend Account efficiently — these are the kinds of decisions that benefit from a conversation before year-end, not after. See our year-end checklist for related planning items.
Book a consultation at www.treehousecpa.com
Frequently Asked Questions
What is the current capital gains inclusion rate in Canada?
The current inclusion rate is 50% — half of a capital gain is included in taxable income. A proposed increase to 66.67% was announced in Budget 2024, deferred, and then the federal government announced it would cancel the proposed increase on March 21, 2025. The rate remains at 50% for individuals, corporations, and most trusts. Many online articles still reference the cancelled proposal, so it's worth confirming the current rules if you're reading older material.
How does the principal residence exemption work?
The exemption shelters the capital gain on the sale of a qualifying home. For each year you designate the property as your principal residence, the gain for that period is sheltered. Critically, the sale must be reported to CRA — the exemption is not automatic. Only one property per family unit can be designated per year. Partial rental use, partial business use, or change-in-use during ownership can reduce the available exemption.
What is the Lifetime Capital Gains Exemption and who qualifies?
The LCGE allows individuals to shelter capital gains on qualifying small business corporation shares, qualifying farm property, or qualifying fishing property. CRA currently refers to a proposed increase to the LCGE to $1.25 million for dispositions after June 24, 2024. Because the legislative status and indexing details have been moving, confirm the enacted limit before relying on it for a transaction. Qualifying for QSBC shares requires meeting specific active-asset tests — 90% at the time of sale, and more than 50% throughout the 24 months before sale — plus a shareholding period requirement. Early planning, particularly purification of passive assets, is often needed.
Can I offset capital gains with capital losses from previous years?
Yes. Net capital losses can be carried back up to 3 years to offset prior capital gains, or carried forward indefinitely to offset future capital gains. Capital losses generally can't be applied against employment or business income. An Allowable Business Investment Loss (ABIL) is a specific exception that may allow a loss on qualifying small business investment to offset other income — this is narrow and depends on the facts.
What are the superficial loss rules?
If you sell an investment at a loss and you or an affiliated person repurchases the same or identical property within 30 days before or after the sale, the loss is denied as a superficial loss. The loss is generally added to the ACB of the repurchased investment — it's deferred, not permanently lost. Affiliated persons include your spouse, corporations you control, and certain registered accounts depending on the facts. To avoid the rule, wait 30 days before repurchasing, or use a similar but genuinely non-identical investment.
What happens to capital gains when someone dies?
On death, a person is deemed to have disposed of all capital property at fair market value immediately before death. The resulting capital gains are reported on the terminal T1 return. Assets can generally roll to a surviving spouse or spousal trust on a tax-deferred basis, but the deferral ends when the surviving spouse ultimately disposes of the assets.
Does selling shares of my small business corporation trigger capital gains?
Yes — a gain on a share sale is a capital gain. If the shares qualify as Qualified Small Business Corporation shares, the LCGE may shelter a significant portion of the gain (confirm the current enacted limit). Whether shares qualify depends on asset composition, the 24-month holding history, and other conditions — and preparation often needs to start well before the sale is on the table.
What is a capital gains reserve?
If proceeds from a sale are payable over more than one year, a capital gains reserve may allow part of the gain to be deferred. Generally, at least 20% of the gain must be included in income each year, making the maximum reserve period five years. Special rules can allow a reserve over up to 10 years in specific cases, including certain transfers to children of family farm or fishing property, certain QSBC share transfers, qualifying business transfers, and intergenerational business transfers.
This article is provided for general informational purposes only and does not constitute personalized tax, legal, or financial advice. Tax rules are subject to change — including legislative proposals that may or may not be enacted. Confirm current rates and rules before any major transaction or filing. Please consult a CPA for advice specific to your situation.
