For most Canadian business owners, the single most valuable tax break available on a sale of their company is the Lifetime Capital Gains Exemption (LCGE). When you sell shares of a qualifying corporation, the LCGE can shelter a substantial capital gain from tax entirely. For 2026 dispositions of qualified small business corporation (QSBC) shares, that exemption stands at $1,250,000 as set on June 25, 2024, increased by indexation to roughly $1,275,000 for the year. With the capital gains inclusion rate remaining at one-half (the proposed increase to two-thirds was deferred and then cancelled in 2025), that exemption can translate into hundreds of thousands of dollars of avoided tax per shareholder.

The catch is that the exemption is not available to just any private company. The shares must meet the technical definition of a qualified small business corporation share in subsection 110.6(1) of the Income Tax Act, and that definition is built around strict asset-composition tests. A corporation that has accumulated excess cash, a portfolio of marketable securities, or real estate it no longer uses in its business can quietly fail those tests — and a failed test on the day of sale can vaporize the entire exemption. The remedy is a process commonly called purification: cleaning the redundant, non-active assets out of the operating company so that the shares qualify. This article explains the tests, why passive assets break them, and the main routes to purify, with a worked example and a planning framework.

The three pillars of a QSBC share

Under s.110.6, a share qualifies as a QSBC share only if three conditions are met:

The small-business-corporation test (the 90% test) — at the time of sale. At the moment of disposition, the company must be a "small business corporation": a Canadian-controlled private corporation (CCPC) where all or substantially all of the fair market value of its assets is used principally in an active business carried on primarily in Canada (or is shares/debt of connected small business corporations). The Canada Revenue Agency interprets "all or substantially all" as 90% or more by fair market value.
The holding-period test (the 24-month test). Throughout the 24 months immediately before the sale, no one other than you or a related person can have owned the shares.
The basic-asset test (the 50% test) — throughout the 24 months. Throughout that same 24-month period, 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 (or have consisted of qualifying connected-corporation shares/debt).

Notice the difference in thresholds and timing. The 90% test is a single-day snapshot taken at sale. The 50% test is a continuous, two-year requirement. A company can pass the 90% test on the closing date yet still fail the 50% test because passive assets ballooned eighteen months earlier. Both must be satisfied. This is why purification cannot always be left to the eve of a sale.

How passive and redundant assets break the tests

The tests measure assets used principally in an active business. The following are common offenders that count against you because they are not active-business assets:

Excess cash and near-cash. Cash genuinely required as working capital is an active-business asset, but cash sitting idle — accumulated retained earnings the business does not need to operate — is generally treated as a passive, non-qualifying asset. There is no fixed safe-harbour percentage; it is a question of fact based on the company's actual operating needs.
Portfolio investments. Marketable securities, GICs held for yield, mutual funds and similar investments are passive assets.
Redundant real estate. Real property used in the business (the premises you operate from) is active. A rental property, vacant land held for appreciation, or a building leased to third parties is generally passive.
Shareholder loans and non-active receivables. Loans to shareholders or related parties that are not part of the active business count against the tests, and may raise separate problems under subsection 15(2).
Life insurance cash surrender value. Depending on purpose and structure, this can be a non-active asset.

When these assets grow large relative to the genuine operating assets, they push the active-business percentage below 90% (failing the snapshot) or, if the build-up has been ongoing, below 50% over the holding period.

What "purification" actually means

Purification is the set of steps that removes redundant non-active assets from the corporation — or converts them into qualifying assets — so the share-qualification percentages are restored. The objective is to get the operating company back above the 90% line at sale (and to have kept it above 50% throughout the 24 months). There are several routes, used alone or together.

Route 1 — Pay dividends up to a holding company

The most common technique is to move excess cash and investments out of the operating company (Opco) and up to a holding company (Holdco) by way of an inter-corporate dividend. Where Holdco and Opco are connected (broadly, Holdco controls Opco or owns more than 10% of its votes and value), dividends generally flow between them on a tax-deferred basis under section 112, subject to the Part IV refundable-tax rules. The redundant assets then sit in Holdco, outside the QSBC test, while Opco's balance sheet is now dominated by active-business assets.

Route 2 — Pay dividends or bonuses to individual shareholders

Excess cash can also be distributed to individual shareholders as taxable dividends or, where appropriate, as salary or bonus. This is simpler than building a Holdco but triggers personal tax. It is often used to strip a modest amount of excess cash, or in combination with owner-manager compensation planning.

Route 3 — The connected-corporation route

Shares of a connected small business corporation can themselves count as qualifying assets at the Opco level. Rather than stripping cash out, a group can be restructured so that the active business is held through a structure where the tested company holds qualifying shares/debt of connected SBCs. This is more involved and is typically combined with a Holdco reorganization; it is also where the LCGE multiplication strategies involving a family trust are commonly layered in.

Route 4 — Re-deploy or invest the assets actively

Sometimes the cleanest fix is to put redundant capital to work in the business — buying equipment, inventory or business premises — converting a passive asset into an active one. This only helps if the deployment is genuine and the assets are truly used in the business.

Purification before a sale versus ongoing purification

There are two planning postures, and the distinction matters because of the 50% continuous test:

Pre-sale (one-time) purification. If a sale is contemplated, a final dividend up to Holdco shortly before closing can fix the 90% snapshot. But this only works if the 50% test has also been satisfied throughout the preceding 24 months. If passive assets were above 50% at any point in that window, a last-minute dividend cannot retroactively cure the breach. This is the trap that catches owners who wait until a buyer appears.
Ongoing (annual) purification. The disciplined approach is to purify regularly — typically each year — sweeping excess retained earnings up to Holdco so the operating company never drifts into offside territory. Ongoing purification keeps the company "sale-ready" at all times and protects the 50% test as a matter of routine rather than crisis. It is particularly valuable where a sale timeline is uncertain or where the LCGE may be claimed on a future estate event rather than an arm's-length sale.

Timing and the 24-month test

Because the 50% test runs continuously for 24 months, the cure for a corporation that is currently offside is time plus action. If you purify today, you generally must keep the company onside and wait out a fresh 24-month period before the shares reliably qualify (subject to the specific facts and the share-issuance history). This is why purification should begin well before any anticipated transaction — ideally two to three years ahead. Buyers and their advisors will diligence the QSBC status, and there is no way to compress the holding-period clock once a problem is identified late.

A worked example

Assume Maria owns 100% of Maple Opco Inc., a CCPC. A buyer offers $2,000,000 for her shares. Her adjusted cost base is nominal. On paper she expects to shelter most of the gain with her 2026 LCGE of about $1,275,000. Maple Opco's balance sheet (fair market value):

Active business assets (equipment, inventory, goodwill, operating premises): $1,400,000
Excess cash beyond working-capital needs: $400,000
Marketable securities portfolio: $200,000

Total assets are $2,000,000. Active assets are $1,400,000, or 70% of fair market value. The passive assets ($600,000) are 30%. The shares fail the 90% test — and if that mix has persisted, the 50% test is borderline but currently onside.

Purification step: Before the sale, Maple Opco pays a $600,000 inter-corporate dividend up to a newly interposed connected Holdco, transferring the excess cash and the securities portfolio. (Assume the dividend is tax-deferred between connected corporations under s.112, subject to Part IV tax that is generally refundable.) After purification, Opco's assets are $1,400,000, of which essentially 100% are active-business assets. The 90% snapshot is now satisfied.

Result: Maria sells the purified Opco shares for $1,400,000 (the buyer takes the operating business; the redundant assets stay behind in Holdco). Her capital gain of roughly $1,400,000 is largely sheltered by the ~$1,275,000 LCGE. At a 50% inclusion rate, only about $62,500 of the gain (half of the ~$125,000 excess over the exemption) enters her income, instead of $700,000 had no exemption been available. The $600,000 of redundant assets remains in Holdco for continued investment.

The cautionary note: If Maria had only purified the day before closing but the passive assets had exceeded 50% of Opco's value at some point in the prior 24 months, the 50% test would have failed and the entire LCGE would have been lost — a roughly $300,000-plus tax difference. The numbers above are illustrative; actual results depend on Part IV tax, provincial rates, the safe-income and anti-avoidance rules, and each shareholder's available exemption.

A purification planning framework

A disciplined process generally follows these steps:

Step 1 — Value the balance sheet. Determine fair market value (not book value) of every asset and classify each as active or passive. Pay close attention to how much cash is genuinely working capital.
Step 2 — Run the percentages. Calculate the active-business percentage today and reconstruct it over the past 24 months. Identify whether the failure is a 90% snapshot problem, a 50% continuous problem, or both.
Step 3 — Confirm CCPC and connected status. Verify the corporation is a CCPC and, if a Holdco is to be used, that Holdco and Opco are connected so dividends flow tax-deferred.
Step 4 — Choose the route. Select among dividends to Holdco, distributions to individuals, the connected-corporation structure, or active re-deployment — usually a combination.
Step 5 — Execute and document. Implement the dividends or reorganization with proper corporate resolutions and tax filings, and document working-capital requirements to support the active-asset characterization.
Step 6 — Start the clock and maintain. Where the 24-month test was breached, keep the company onside and let a fresh period run. Where the company is being kept sale-ready, repeat the purification annually.
Step 7 — Coordinate with the broader plan. Align purification with succession and any estate freeze or family-trust structure intended to multiply the exemption among family members.

Purification interacts with several anti-avoidance and integrity rules — the safe-income rules governing inter-corporate dividends, subsection 55(2), the section 84.1 rules on related-party share sales, and the general anti-avoidance rule — so each step must be tested against them rather than executed mechanically.

How Barrett Tax Law approaches QSBC purification

Barrett Tax Law begins by valuing and classifying the corporation's assets to measure the current active-business percentage and to reconstruct it across the 24-month window, so we can see whether the issue is the 90% snapshot, the 50% continuous test, or both. From there we model the purification routes — dividends to a connected Holdco, distributions to shareholders, connected-corporation structuring, or re-deployment — against the s.55, s.84.1 and GAAR considerations, and we sequence the steps with the 24-month clock and any sale or succession timeline in mind. Where the company is not yet sale-ready, we set up an ongoing annual purification routine so the shares stay qualified. The goal is a corporation whose shares reliably meet the QSBC definition when the exemption is claimed, with the planning documented to withstand CRA review.

If you are considering a sale, an estate freeze, or simply want your company kept sale-ready, we offer a free, confidential consultation to review your structure and outline a purification plan suited to your situation.

Frequently asked questions

What is QSBC purification and why would my company need it?

Purification is the process of removing redundant, non-active assets from your operating company so its shares qualify as qualified small business corporation (QSBC) shares under section 110.6 of the Income Tax Act. The Lifetime Capital Gains Exemption is only available on QSBC shares, and those shares must pass strict asset-composition tests. When a company accumulates excess cash, a portfolio of investments, or real estate it no longer uses in the business, those passive assets can push the active-business percentage below the required thresholds and disqualify the shares. Purification — typically paying a dividend up to a holding company, or re-deploying the assets actively — restores the qualifying percentages. Without it, an otherwise valuable exemption worth hundreds of thousands of dollars in saved tax can be lost on the day of sale.

What is the difference between the 90% test and the 50% test?

Both tests measure how much of the corporation's fair market value is used in an active business carried on primarily in Canada, but they apply at different moments and at different thresholds. The 90% test (the small-business-corporation test) is a single-day snapshot taken at the time of sale: at that moment, 90% or more of the corporation's asset value must be active-business assets. The 50% test (the basic-asset test) is continuous: throughout the entire 24 months before the sale, more than 50% of asset value must have been active. A company can satisfy the 90% snapshot on closing day yet still fail because passive assets exceeded 50% at some earlier point in the two-year window. Both tests must be met, which is why a last-minute clean-up alone may not be enough.

Can I purify my corporation right before I sell it?

You can fix the 90% snapshot test shortly before closing by paying a dividend of the excess cash and investments up to a holding company, leaving the operating company holding mostly active-business assets on the sale date. However, this only works if the 50% continuous test has also been satisfied throughout the 24 months leading up to the sale. A last-minute dividend cannot retroactively cure a period during which passive assets exceeded half of the company's value. If the build-up of redundant assets has been ongoing, you may need to purify and then wait out a fresh 24-month period before the shares reliably qualify. For this reason, purification should ideally begin two to three years before any anticipated sale rather than once a buyer has appeared.

How does paying a dividend to a holding company purify the operating company?

Where a holding company (Holdco) is connected to the operating company (Opco) — broadly, Holdco controls Opco or owns more than 10% of its votes and value — Opco can pay an inter-corporate dividend up to Holdco. Under section 112 these dividends generally flow on a tax-deferred basis, subject to the Part IV refundable-tax rules and the safe-income and subsection 55(2) anti-avoidance provisions. The excess cash and investment portfolio then sit in Holdco, outside the QSBC asset tests, while Opco's balance sheet is left dominated by active-business assets. This restores the active-business percentage above the 90% threshold. The structure also creates a vehicle to continue investing the redundant capital and to repeat the purification annually, keeping Opco's shares sale-ready over time.

What counts as a passive asset that can disqualify my shares?

Passive or non-active assets are those not used principally in the active business. Common examples include cash and near-cash beyond genuine working-capital needs, marketable securities, GICs and mutual funds held for yield, rental or vacant real estate and property leased to third parties, loans to shareholders or related parties that are not part of the business, and in some cases the cash surrender value of life insurance. Premises you actually operate from, equipment, inventory and goodwill are active assets and count in your favour. There is no fixed safe-harbour percentage for retained cash; whether cash is working capital or redundant is a question of fact based on the company's actual operating requirements, so documenting those requirements is an important part of supporting the active-asset characterization.

How much is the Lifetime Capital Gains Exemption worth in 2026?

For 2026 dispositions of qualified small business corporation shares, the exemption is based on the $1,250,000 limit set on June 25, 2024, increased by annual indexation to roughly $1,275,000 for the year. Because the capital gains inclusion rate remains at one-half — the proposed increase to two-thirds was deferred and then cancelled in 2025 — the exemption shelters a capital gain up to that amount from tax. Each individual shareholder has their own exemption, so structures involving a family trust can sometimes multiply the benefit among family members. Confirm the precise indexed figure for the year of disposition, as the limit changes annually. The exemption is only available if the shares meet the QSBC definition, which is why protecting that status through purification is central to realizing the full benefit.

QSBC Purification: Cleaning Up a Corporation to Protect the LCGE