What is the lifetime capital gains exemption and how do I qualify?

What the exemption actually shelters

The lifetime capital gains exemption is a personal exemption, claimed on an individual's tax return, that reduces the taxable capital gain on the sale of qualified small business corporation shares to zero, up to a lifetime limit. For dispositions after June 24, 2024, that limit is $1.25 million of capital gain, and the exemption amount is set to be indexed for inflation starting with the 2026 tax year, though the exact indexed figure for any given year should be confirmed directly against the CRA's published amount rather than assumed. This is one of the largest tax breaks available to a Canadian small business owner, and it exists specifically to reward building and eventually selling a genuine small business, rather than simply holding investments inside a corporate shell.

The 90% active asset test at the time of sale

To qualify as a QSBC share at all, at least 90% of the fair market value of the corporation's assets must be used principally in an active business carried on primarily in Canada, measured at the moment of sale. Cash, investments, and other passive assets sitting inside the corporation count against this test, which is why a corporation that has accumulated significant retained earnings in investments, rather than reinvesting or distributing them, can fail the 90% threshold even though the underlying operating business is entirely legitimate.

The 50% test over the prior 24 months

A second, related test looks backward: throughout the 24 months immediately before the sale, more than 50% of the corporation's assets must have been used in an active business. This test exists to stop a corporation from loading up on passive assets for years and then quickly converting to mostly active assets right before a sale just to pass the 90% test at closing.

The 24-month holding period

The shares themselves generally must have been owned by the individual claiming the exemption, or by a person related to them, throughout the 24 months before the disposition. This holding period is what makes the exemption unavailable to someone who incorporates a business and sells the shares almost immediately, and it is also why certain corporate reorganizations done shortly before a planned sale need careful review, since restructuring too close to closing can reset or complicate this clock.

Purification: cleaning up the balance sheet before a sale

Because passive assets count against the 90% and 50% tests, owners planning to sell often go through a process called purification in the period leading up to a sale, moving excess cash, investments, or other passive assets out of the operating corporation, commonly into a holding company through a tax-deferred rollover, so the operating company's asset mix qualifies at the time of sale. This is one of the main reasons owners consider setting up a holding company well ahead of a planned exit rather than at the time of sale itself. Purification needs to happen well before a sale is finalized, both because of the 24-month look-back test and because rushed, poorly structured purification transactions can create their own tax problems.

A common mistake is starting purification only once a buyer is already at the table. Because the 50% test looks back 24 months, moving passive assets out of the corporation in the weeks before closing does nothing to fix a two-year history of a balance sheet that was mostly cash and investments; it only fixes the snapshot at closing, which is the easier of the two tests to satisfy. Owners who wait until a sale is imminent to think about QSBC status often discover the harder test has already been failed for a period they can no longer go back and change.

Multiplying the exemption across a family

Because the LCGE is a personal exemption available to each individual, a family that structures share ownership across multiple family members, such as a spouse or adult children who are genuine shareholders, can potentially multiply the total exemption available on a single sale, since each qualifying individual has their own lifetime limit. This kind of multiplication has to be set up well ahead of a sale and needs to withstand scrutiny under the tax on split income rules and genuine ownership requirements; it is not something that can be layered on shortly before closing.

What can reduce the exemption available

A few other balances can shrink how much of the LCGE an individual can actually claim, even if the shares themselves qualify. A cumulative net investment loss (CNIL) balance, built up when investment expenses have exceeded investment income over the years, reduces the exemption dollar for dollar. An allowable business investment loss (ABIL) claimed in the current or a prior year can also reduce the exemption available. Separately, a large capital gain sheltered by the LCGE can still factor into the alternative minimum tax calculation, which has its own rules and should be checked as part of any significant sale, not treated as an afterthought. Each of these balances is calculated on the individual's own tax history, not the corporation's, which is another reason a family sale involving multiple shareholders needs each person's position reviewed separately rather than assuming everyone qualifies for the same net benefit.

How we handle this

We start reviewing QSBC qualification years before a planned sale, not in the months before closing, so purification, family ownership structuring, and the 24-month tests all have time to be done properly. This planning work is part of our business advisory and CFO services and our incorporation and compliance services.

Source: CRA — Capital gains deduction.