Monday, March 30th, 2026 | 78 Reads
This is good news if you sell qualifying small-business shares at a gain and want to keep your money invested in another qualifying small business.
Canada’s “capital gains rollover” for small business shares is really a capital gains deferral rule.
If you personally sell certain qualifying shares of a small business at a gain and then reinvest the sale proceeds into qualifying replacement shares of another small business, you may be able to postpone reporting some or all of that capital gain right now.
But the tax is not necessarily erased. It is usually pushed forward by reducing the adjusted cost base of the replacement shares.
You invest in a qualifying small business and your shares go up in value and you then sell them.
If you take those proceeds and buy qualifying replacement shares within the required time, CRA may let you defer the gain.
CRA’s current guide says that under proposed changes, the replacement shares can be bought in the year of sale or by the end of the following calendar year.
CRA also says the eligible-share rules were expanded so the shares no longer need to be common shares and the asset-size ceiling increased to $100 million.
The big idea is that this is for moving money from one qualifying small-business investment into another, but it is meant for individuals or trusts.
The shares sold must be “eligible small business corporation shares,” you must generally have held them for more than 185 days, and while you held them the issuing corporation must have been an active business corporation.
Corporations that are professional corporations, specified financial institutions, or mainly real-estate, leasing, rental and development businesses are excluded from this regime.
The amount you can defer is proportional to how much of the sale proceeds you reinvest.
CRA’s formula is essentially: capital gain × (lesser of replacement-share cost and sale proceeds ÷ sale proceeds).
That means:
So if you reinvest all the proceeds, you may defer the full gain. If you reinvest only half the proceeds, you generally defer only half the gain.
CRA also says the deferred amount reduces the ACB (adjusted cost base) of the replacement shares, which is why the tax is usually postponed rather than eliminated. This means CRA lets you delay the gain now, but it “stores” that delayed gain inside the new shares by lowering their (ACB). ACB is basically your tax cost for the shares.
Example: suppose you sell qualifying shares for $300,000, your ACB was $100,000, and your capital gain is $200,000. If you reinvest the full $300,000 in qualifying replacement shares on time, the full $200,000 may be deferred.
If you reinvest only $150,000, the formula would generally defer $100,000 of the gain, and the other $100,000 would still be recognized now. That example follows CRA’s formula and ACB-reduction rule.
As of March 30, 2026, CRA’s guidance describes the expanded rules as “proposed changes,” and the current consolidated Income Tax Act section 44.1 still shows the older version of the law and includes the old common-share requirement – the $50 million threshold, and the shorter replacement-share deadline of the year of sale plus 120 days after year-end.
So the current safest reading to go by is: CRA is administering this with proposed-change guidance, but the consolidated statute still shows the pre-change wording.
Readers note: this rollover is different from the lifetime capital gains deduction. The rollover defers a gain; it does not exempt it. CRA also says a gain you defer under this rule does not qualify for the capital gains deduction for that same deferred amount.
If you are thinking about selling shares, reinvesting in another business, or trying to understand whether a capital gains deferral may apply to your situation, it makes sense to get proper guidance before making a move.
Tax rules in this area can be very specific, and the small details can affect timing, eligibility, and how much tax may be deferred, which is why speaking with a professional about your Taxation Services needs is a sensible next step.
If you need support with bookkeeping, tax preparation, payroll, or other financial services, take a look at our full range of solutions. We provide practical help for businesses that want clear records, better organization, and reliable financial support.
Email: llmbusiness@outlook.com
Phone: 226-802-0541
