Lifetime Capital Gains Exemption 2026: How to Shelter $1.275 Million When You Sell Your Business

You spent fifteen years building the business. A buyer finally makes an offer, your lawyer drafts the agreement — and then your accountant tells you the shares do not qualify. The lifetime capital gains exemption is the single largest tax break available to Canadian business owners, worth more than $340,000 in avoided tax at Ontario’s top rate, and it is also the one most often lost on a technicality discovered six weeks before closing. This 2026 guide explains how much the exemption is worth this year, the three tests your shares must pass, how to fix shares that fail them, and the traps — CNIL, AMT, section 84.1 — that quietly shrink the claim.

What the lifetime capital gains exemption actually is

The lifetime capital gains exemption is a deduction that lets an individual resident in Canada shelter capital gains realized on qualifying property from personal income tax, up to a cumulative lifetime maximum. It applies to three kinds of property: shares of a qualified small business corporation (QSBC), qualified farm property, and qualified fishing property. Most Ottawa business owners encounter it exactly once — on the sale of their company.

The word “lifetime” matters. This is a running total, not an annual allowance. Claim $400,000 on a sale in 2019 and only the remainder is available the next time. It is also personal to the individual, not to the corporation, which is why who owns the shares — you, your spouse, a family trust — determines how much of a future gain can be sheltered.

Two structural points decide whether it applies at all. First, the exemption attaches to shares, so it is available on a share sale and not on an asset sale where the corporation sells its equipment, inventory and goodwill. Second, it is only available to incorporated businesses; a sole proprietor selling their business is selling assets and has nothing to claim. If you are still weighing that structure, our guide on the difference between a sole proprietorship and incorporation covers what changes when you incorporate.

How much is the exemption in 2026?

For 2026, the lifetime capital gains exemption on QSBC shares and qualified farm or fishing property is $1,275,000. That figure reflects the 2% indexation adjustment applied to the $1,250,000 limit that applied for 2025.

The path to that number was unusually messy, and it is worth understanding because it affects sales you may already have closed. The increase from the old indexed limit of $1,016,836 to $1.25 million was announced in Budget 2024 for dispositions on or after June 25, 2024, then sat unlegislated through a prorogation and an election. It was finally enacted in Bill C-15, the Budget 2025 Implementation Act, No. 1, which received royal assent on March 26, 2026. Two related proposals did not survive: the increase in the capital gains inclusion rate to two-thirds was cancelled in March 2025, so the inclusion rate remains 50%, and the Canadian Entrepreneurs’ Incentive was cancelled in Budget 2025.

What that combination is worth in real money depends on your marginal rate. At Ontario’s top combined rate of 53.53%, capital gains are effectively taxed at 26.77%. Sheltering the full $1,275,000 therefore avoids roughly $341,000 of personal tax — and a couple who each hold qualifying shares can shelter up to $2,550,000 between them.

The three QSBC tests your shares must pass

Shares qualify as QSBC shares only if all three of the following are true. Failing any one of them disqualifies the entire claim, not part of it.

1. The 90% test, at the moment of sale. At the time you dispose of the shares, all or substantially all — the CRA reads this as 90% or more — of the fair market value of the corporation’s assets must be used principally in an active business carried on primarily in Canada, or be shares or debt of connected corporations that themselves meet the test.

2. The 50% test, throughout the preceding 24 months. For the entire 24 months before the sale, more than 50% of the fair market value of the corporation’s assets must have been used principally in an active business carried on primarily in Canada. This is a continuous test, not a snapshot: a single quarter where a large cash balance tipped the company over the line can break it.

3. The 24-month holding period. The shares must not have been owned by anyone other than you or a person or partnership related to you at any time in the 24 months before the sale.

The practical meaning of these three tests is that qualification is decided in the two years before a sale, not at closing. A corporation that has been quietly accumulating retained earnings in a savings account or an investment portfolio is usually the one that fails, and by then the 24-month clock cannot be rewound. This is one of the strongest arguments for reviewing your balance sheet annually alongside your T2 corporate return rather than only when a buyer appears.

Purification: fixing shares that fail the 90% test

Purification is the process of removing non-active assets from the operating company so that its share value is once again attributable almost entirely to the active business. It is routine work, and it is the single most valuable thing a profitable corporation can do in advance of a sale.

Consider a common Ottawa profile: a consulting corporation worth $1.6 million, of which $600,000 sits in a marketable securities account built up from years of retained profits. Active business assets are only about 62% of fair market value, so the 90% test fails and the exemption is unavailable — on a gain that would otherwise have been almost entirely sheltered.

The usual fixes are straightforward individually and technical in combination:

• Pay a dividend to the shareholder or to a holding company, moving surplus cash out of the operating company.
• Transfer passive assets to a holding company on a tax-deferred basis using a section 85 rollover, isolating investments from the operating business.
• Repay shareholder loans owing by the corporation, which reduces cash without triggering personal tax.
• Redeploy cash into the business — equipment, premises, hiring — where that spending was going to happen anyway.
• Pay a bonus or salary before year-end, which is deductible to the corporation and reduces retained cash.

Timing is the part owners underestimate. Because the 50% test looks back a full 24 months, purification that happens the month before closing may satisfy the 90% test at closing while still failing the look-back test. Plan on 12 to 24 months of runway. Which method is cheapest depends on your marginal rate and the corporation’s tax pools, and the analysis overlaps heavily with how you take money out generally — our guide on how to pay yourself as a small business owner covers that side of it.

Multiplying the exemption across your family

The exemption belongs to the individual, so a business owned by more than one person can shelter more than one exemption. Two spouses who each hold qualifying shares can shelter $2,550,000 of gain in 2026. Where a family trust holds shares and can allocate a capital gain to several beneficiaries, the multiple grows further.

The structures that make this possible — a family trust, usually combined with an estate freeze that fixes the current owner’s value in preferred shares while future growth accrues to new common shares — have to be in place well before a sale, and they are not free. Expect legal and accounting costs to set one up, annual trust filings afterward, and the 21-year deemed disposition rule to manage down the road.

Two cautions matter more than the arithmetic. First, the tax on split income (TOSI) rules restrict which family members can receive dividends at their own rates, though capital gains on QSBC shares are treated more favourably than dividends. Second, shares issued to a spouse or adult child a few months before closing will not have satisfied the 24-month holding period, so the plan has to precede the sale by at least two years. If income splitting is already part of your planning, our overview of income splitting in Canada gives the wider context.

Five traps that shrink or kill the claim

Even shares that pass all three tests can produce a smaller benefit than expected. These five are the ones that surface most often in practice.

Alternative minimum tax. Since 2024, 30% of capital gains eligible for the exemption are included in the AMT base, where previously they were fully excluded. AMT is calculated at 20.5% on income above an exemption of $181,440 for 2026, so a large exempt gain can generate real tax in the year of sale even though the gain itself is sheltered. AMT paid is recoverable against regular tax over the following seven years, but it is a cash-flow event that has to be budgeted for.

Cumulative net investment loss (CNIL). If your cumulative investment expenses have exceeded your cumulative investment income since 1988 — most commonly through interest on money borrowed to invest — the balance reduces the exemption available to you dollar for dollar. Check the balance early; it can usually be reduced before a sale.

Section 84.1. Selling shares to a corporation you do not deal with at arm’s length, including your own holding company, can convert what looks like a capital gain into a deemed dividend, taxed at dividend rates with no exemption available. This anti-surplus-stripping rule catches well-intentioned reorganizations and is a reason not to move shares between related entities without advice.

Prior claims and allowable business investment losses. Exemption used on an earlier sale reduces what remains, and an allowable business investment loss claimed in a past year also grinds down the available amount. Neither shows up on a term sheet.

Asset sales. Buyers frequently prefer to buy assets rather than shares, because they get a stepped-up cost base and leave historical liabilities behind. An asset sale removes the exemption from the table entirely, so the price difference between the two structures should be negotiated with the after-tax outcome in view, not the headline number.

How to claim it, and when to start

Mechanically, the claim is straightforward. You report the disposition on Schedule 3 of your T1, calculate the deduction on Form T657, Calculation of Capital Gains Deduction, and claim it on line 25400 of your return for the year of sale. The CRA’s guidance on the capital gains deduction at line 25400 sets out the current limits and forms.

One additional provision is worth knowing where the purchase price is paid over time. A capital gains reserve lets you spread the gain over up to five years — recognizing a minimum of 20% each year — where part of the proceeds is not receivable until a later year. That can smooth the AMT impact and, where the gain exceeds the exemption, keep more of the taxable portion in lower-bracket years.

The realistic timeline looks like this:

Why BBA Tax is the right choice for your business sale

BBA Tax is an Ottawa accounting and tax firm working with incorporated owner-managers, consultants and contractors across the National Capital Region. Sale planning is where our corporate tax services earn their keep: we test your shares against the QSBC rules while there is still time to fix them, rather than confirming a problem during due diligence.

Because we handle bookkeeping, corporate returns and personal returns together, we see the balance sheet that determines qualification and the T1 where the exemption is finally claimed. That means the purification plan, the AMT projection and the reserve calculation are built from the same set of numbers, and the claim is supported by records that hold up if the CRA reviews it.

We are locally owned, we work with Canadian owner-managed businesses, and we would rather have the conversation two years early than two months late. If incorporation or a restructuring is part of the picture, we can handle that side as well.

Conclusion

The lifetime capital gains exemption is worth $1,275,000 in 2026 and more than $340,000 in avoided tax for an Ontario seller at the top rate, but it rewards preparation rather than negotiation. The three QSBC tests are decided by what your balance sheet looked like over the previous 24 months, purification takes a year or two to do properly, and AMT, CNIL and section 84.1 can all reduce a claim that otherwise looks clean. Review your share structure annually, keep passive assets out of the operating company, and start the conversation long before a buyer does — that is the difference between a sheltered gain and an expensive one.

Frequently Asked Questions