Purifying a company for the QSBC capital gains exemption
Surplus cash and investments inside a company can cost its owner the QSBC exemption. This is how the asset tests read a balance sheet, and how owners clear it in time for a sale.
The QSBC exemption is the lifetime capital gains exemption on qualified small business corporation shares, $1,275,000 of gain in 2026. Purification moves passive assets such as surplus cash out of the corporation so its shares qualify. The company needs 90 percent active assets at the sale and more than 50 percent throughout the prior 24 months.
What purification means
The QSBC exemption is the lifetime capital gains exemption as it applies to qualified small business corporation shares, or QSBC shares. It shelters a gain on shares only when they hold that status, and much of the status depends on what the company owns.
Purification is the work of moving assets the tax rules treat as passive out of the company, so that its balance sheet passes the asset tests. It has a long lead time, for reasons the tests themselves make plain.
The limit has been $1.25 million of gain for dispositions since June 25, 2024. Indexation resumed in 2026, and the Department of Finance’s September 2026 release and the CRA’s indexation table put it at $1,275,000 for 2026.
The three tests, read against a balance sheet
Two of the tests look at the company’s assets by fair market value. The third looks at who has owned the shares.
| Test | Threshold | When it applies |
|---|---|---|
| Small business corporation | A Canadian controlled private corporation with 90 percent or more of its asset value used in an active business carried on mainly in Canada, or held in qualifying connected companies | At the moment of sale |
| Asset test over the look back | More than 50 percent of asset value used the same way | Throughout the 24 months before the sale |
| Holding period | Shares owned only by you, a person related to you or a partnership you belong to | Throughout the 24 months before the sale |
The first test is the strict one, and it is measured on a single day. The second is looser. It has to hold on every day of a two year window, which is where most of the planning goes.
The Canada Revenue Agency’s definitions read the 90 percent threshold as “all or most” of the value. A profitable company can fail either asset test while its business runs well.
What sits on the passive side
Assets used in the business pass. Commentators describe the line for cash as the point where taking more out would destabilise the business.
| Asset | How the tests usually treat it |
|---|---|
| Cash the business needs for payroll, payables and planned purchases | Active |
| Cash above that level, term deposits and marketable securities | Passive |
| Loans to shareholders | Generally passive |
| Loans to companies outside the connected group | Generally passive |
| Permanent life insurance on a shareholder’s life | Valued at its cash surrender value, and counted as passive |
| A building partly rented to unrelated tenants | Depends on how much of it the business itself uses |
| Shares or debt of a connected company that itself qualifies | Active, under look through rules that add conditions |
The test runs on value. A company whose operating assets are worth $3 million can hold about $333,000 of passive assets and still meet 90 percent.
Fair market value is the measure, so the answer depends on a valuation of the company as well as its books. A rise in the value of a portfolio can make a company fail the test in a year when the business itself is unchanged.
Why it has to start early
Clearing surplus a month before closing can satisfy the 90 percent test on the day. The 50 percent test looks back 24 months. Any day on which passive assets reached half the company’s value stays inside that window for two years.
That wait has to fit inside the sale timetable. It is the reason to raise purification at the first conversation about an exit, alongside the rest of preparing a business for sale. Where two partners own the company, the tests apply to both at once, as selling a business with a partner notes.
Reorganisations bring a second timing rule. Under the Income Tax Act, shares a company issues are treated as owned by an unrelated person just before their issue.
The exceptions cover shares issued for other shares and shares issued for substantially all the assets of an active business, so the order of each step matters.
How owners purify
The simplest route is to use the surplus. The company can pay down debt or buy equipment and inventory it needs. Bringing tax instalments up to date also draws cash down.
A dividend to the shareholders moves surplus out directly. The owner pays personal tax on it in the year it is paid, and that cost is what a holding company structure aims to defer.
Where a holding company owns a class of the operating company’s shares, the operating company can pay that class a dividend. Dividends between Canadian corporations generally move free of tax, so the surplus leaves the operating company and stays at the corporate level.
That structure has to exist well before the sale. The shares the owner will sell also have to meet the holding period, which brings the issuing rule above into play.
The safe income caution
Section 55 of the Income Tax Act limits dividends between companies. Where one purpose of a dividend is to reduce the capital gain on a later sale of shares, the receiving company can be taxed on it as a capital gain.
The rule stops at safe income. Broadly, that is the after tax income the company has earned since 1971 that contributes to the gain on its shares. A dividend within that amount falls outside the rule.
Safe income takes a technical calculation. A purification dividend above it, paid in a series of transactions that ends in a sale to an arm’s length buyer, can become a taxable gain for the holding company.
Larger passive holdings are sometimes moved into a sister company owned by the same family. The operating company transfers the assets on a tax deferred basis for shares, which are then redeemed.
The CRA approved a plan of this kind in an advance ruling, relying on the related party exception in section 55(3)(a). That exception applies only while the series stays within the family.
A butterfly reorganisation under section 55(3)(b) divides a company’s assets between corporations, and one law firm calls it a last resort because of its cost and complexity.
Minimum tax and CNIL
A sheltered gain can still produce tax in the year of sale through the alternative minimum tax. For taxation years beginning after 2023, about 30 percent of a gain covered by the exemption enters the minimum tax base, and the federal minimum tax rate is 20.5 percent.
Minimum tax is payable only where it exceeds regular tax. The CRA’s 2025 guidance says it is unlikely at an adjusted total of $177,882 or less. Minimum tax paid can be credited against regular tax over the following seven years, after which any unused amount is lost.
Your cumulative net investment loss, or CNIL, reduces the deduction you can claim. It is the amount by which your investment expenses since 1988 exceed your investment income. Interest on money borrowed to invest adds to it, as do rental losses.
Investment income reduces it, and that includes dividends an owner draws from the company. An owner paid mainly by salary can carry a CNIL balance from years of investment expenses. Form T936 tracks the figure.
Where an accountant comes in
Each step above turns on your own numbers, and several of them carry tax of their own. These are the questions owners commonly bring to their accountant. The accountant’s side of the same file is set out in the guide for accountants whose clients are selling.
- 01Ask for both asset tests to be run at fair market value on today’s balance sheet and on each quarter end of the past two years.
- 02Safe income should be calculated before any dividend moves between companies.
- 03Your CNIL balance shows on Form T936, and your accountant can tell you whether a dividend in an earlier year would clear it.
- 04Minimum tax in the sale year belongs in the model beside regular tax, along with the years available to recover it.
The exemption applies only to a share sale, so purification matters most where a share sale is on the table. A free Quick AI valuation gives an early read on what the business is worth.
This piece describes the rules in general terms and is a report, for information only. The figures follow the Income Tax Act and the published guidance of the Canada Revenue Agency and the Department of Finance, as of September 2026. Take advice on your own facts before acting.
Questions owners ask
- What does it mean to purify a company before a sale?
- It means moving assets the tax rules treat as passive out of the corporation, so its shares meet the asset tests for the lifetime capital gains exemption. Surplus cash and portfolio investments are the usual targets. Shareholder loans and the cash value of corporate life insurance count as passive too.
- Why is purifying just before closing too late?
- A late clean up can satisfy the 90 percent test on the day of sale. The second test requires more than 50 percent active assets throughout the 24 months before the sale, and any day that fell short stays inside that window for two years.
- Can a holding company help with purification?
- A holding company can receive dividends from the operating company, generally free of tax, which moves surplus out of the company being sold. Section 55 limits this to safe income, and an accountant calculates that figure before any dividend is paid.