The lifetime capital gains exemption, and the two dates that decide whether you get it

Summary

If you sell shares in a company you own, the lifetime capital gains exemption lets you keep a capped amount of the profit, called a capital gain, free of personal income tax. For a sale during 2026 the cap is $1,275,000 of profit, claimable once in your lifetime rather than once per sale.¹ The exemption belongs to a person, not to a company, so a holding company (one that exists to own things rather than to trade) gets no exemption when it sells the shares of your operating company (the one that actually runs the business and earns the revenue).

Whether your shares qualify is settled on two dates, and only closing day, the day the sale completes, is still in your hands once a buyer appears. The 24 months before it are already history.

1. On closing day, your company has to be Canadian-controlled and private (not listed on a stock exchange, not controlled from outside Canada), and almost everything it owns, by market value, has to be used in the business. The Canada Revenue Agency (CRA) reads “almost everything” as 90% or more, which is its practice, not law.
2. Throughout the 24 months before closing day, the company had to be Canadian-controlled and private the whole time, more than half of what it owned by value had to be used in the business, and nobody outside you and your relatives can have owned the shares.

The most common way owners fail is cash, since profits parked in investments inside the company aren’t business assets.

So treat the exemption as something you keep in good repair every year, not something your accountant arranges once a buyer shows up. By then it’s usually too late. Hold the shares personally, move cash and investments the business doesn’t need out of the company routinely, and recalculate the 90% figure at every year-end. We’d advise differently if you’re about to lose eligibility for a reason outside your control (e.g. a foreign investor taking control), in which case claiming it early, through a paper sale with no real buyer and no cash, is worth pricing.

What the exemption is worth in 2026

Only half of a capital gain is taxable in Canada, a proportion that survived a proposal to raise it (what changed for 2026). So on a full claim you sell for a $1,275,000 gain, half of it ($637,500) is the taxable part, and a $637,500 deduction on line 25400 of your personal return cancels that out, leaving no regular income tax on the sale, before the minimum-tax calculation below.¹ On the return the exemption is called a deduction, which is why you’ll see both words used for the same thing.

If the sale is your only income that year, federal tax on $637,500 would otherwise come to about $184,000. If you already have $258,482 or more of other income in 2026, all of it falls in the top federal bracket of 33%, and the saving is about $210,000. Your province charges its own tax on top of either figure.²

Your available amount can also be smaller than $1,275,000. Exemption claimed in an earlier year comes off the top, and so does a lifetime tally of investment expenses (e.g. interest on an investment loan) against investment income, called cumulative net investment loss, which cuts your claim dollar for dollar. Form T936 keeps that total, and someone has to complete it each year.³

What the conditions mean in practice

A share that qualifies is called a “qualified small business corporation share”.⁴ Fair market value, the measure used throughout, means what a willing buyer would pay for what the company owns rather than what your books record. The 90% mark on closing day is the CRA’s reading of a statutory phrase, “all or substantially all”, that the legislation never defines, so aiming to land exactly on it is risky.⁵ Used in the business means used in an active business (e.g. plumbing or dentistry, as opposed to holding investments or collecting rent) carried on mainly in Canada.

On the ownership condition, a business partner who isn’t family counts as an outsider, so shares you buy from one start a fresh 24-month clock while the shares you already held are unaffected. Brand-new shares the company issues count as having been owned by an outsider a moment before issue, so they start their own clock too. Three kinds are carved out: shares issued in exchange for other shares, shares issued as a stock dividend, and shares issued on moving substantially all of an active business’s assets into the company.⁵ Issuing shares to a spouse three months before a closing therefore accomplishes nothing.

Which assets count is where the real judgment sits. Receivables, inventory, equipment, your premises, goodwill (the value of the business itself over and above the things it owns) and working capital all qualify. An investment portfolio built out of retained profits, a rental property and surplus cash don’t. Cash sits on both sides of that line, since cash the business actually needs (e.g. payroll, supplier payments and a normal operating buffer) counts as a business asset and cash piled up beyond that doesn’t. There’s no fixed formula for the split, which is why it’s worth writing down your reasoning each year. A company holding $900,000 of business assets and $200,000 of investments has 82% of its value in the business, and fails on closing day. Shares of a connected small business corporation count as business assets too, which is how your own holding-company shares can qualify even though the holding company itself claims nothing, and we haven’t covered that case here.⁴

Where owners lose it

Three further ways of losing the exemption have nothing to do with what your company owns.

1. You sell your shares to a company that you or your family control. Section 84.1 of the Income Tax Act then treats the cash or promissory note you take out of that buying company as a dividend rather than as a capital gain, to the extent it exceeds what you originally paid for the shares. Dividends can’t be sheltered by this exemption, so the shelter goes with the money.⁶
2. Your buyer wants the things the company owns rather than your shares, which leaves you holding an empty company. In that kind of sale the company makes the profit rather than you, and the exemption belongs to people rather than companies, so it can’t be used at all.
3. You don’t report the sale properly, which is the only failure here with no fix. If you fail to report the gain, or file that year’s return more than a year late, knowingly or in circumstances amounting to gross negligence, the exemption is denied against that gain for good. Your lifetime allowance survives for a future sale, but the profit on this one can never be sheltered.⁷

Alternative minimum tax in the year of sale

Claiming the exemption also triggers alternative minimum tax. It’s a second federal calculation that counts your whole gain as income and hands back most of the deduction rather than all of it, so someone with a large sheltered gain still pays something.⁸ On a full $1,275,000 sheltered gain with no other income in the year, federal minimum tax works out at roughly $40,000, payable in the year of sale. Ontario and most other provinces charge their own minimum tax on top. Below a sheltered gain of about $625,000, again with no other income, no federal minimum tax arises at all.⁹

What you do pay comes back as a credit against regular federal tax over the following seven years, so for an owner who keeps earning it’s a cash-flow problem rather than a permanent cost. For an owner who retires on the proceeds with little taxable income afterwards, it can turn permanent.

Purification

Purifying means moving surplus cash and other non-business assets out of the operating company, so the 90% figure keeps being met. Done routinely and years ahead of a sale, it’s the most useful thing you can do before a buyer appears.

What purifying costs is real money, because paying surplus out to yourself triggers personal tax long before you need the cash. Moving it up to a holding company that owns your operating company defers that personal tax, since money can usually pass between connected companies without immediate tax. The cost there is a second corporate return every year, plus restrictions on those transfers that need checking before each one. Purifying inside a live sale process needs proper advice rather than improvisation.

Crystallizing (claiming the exemption early through a paper sale to a company you control, which has to be structured carefully to avoid the section 84.1 problem above), a spouse’s own exemption, and sales to children, employee trusts or worker cooperatives are each left to separate articles.

How often this changes

The cap moves every January now, so check the year on any number you rely on. The 2026 cap of $1,275,000 is 2.0% above the 2025 figure of $1,250,000, the exemption having started rising with inflation again in 2026, after the higher limit was held through 2025.¹ That $1,250,000 rise was announced in 2024 and applies to qualifying sales from June 25, 2024 onward, but it only became law in March 2026, so some CRA pages still call it a proposal.¹⁰ We’d recalculate the 90% asset figure at each year-end alongside the corporate return, and straight away if the company buys a large non-business asset, if share ownership changes, or if a buyer opens a conversation.

Closing thoughts

In our view this is the largest single tax break most Canadian business owners will ever get, and very little of the work that earns it happens at the sale. Almost all of it happens in the quiet years before, in what you let pile up inside the company. Businesses get sold on somebody else’s timetable, and the ones that qualify are the ones that were already tidy when the call came.

How we handle it

We calculate the 90% asset figure at each year-end while preparing the corporate return, and we keep the calculation on file, so the answer is on record rather than reconstructed years later when a buyer’s lawyers start asking. We also keep Form T936 current every year, and we flag surplus building up in the operating company while there’s still time to move it. Year-round planning is where owners with an exit in mind usually end up.