Tax when you sell a business in Canada

There is no single tax rate that applies to "selling a business" in Canada, because a business sale isn't one transaction for tax purposes — it's whichever one of two very different structures the parties actually use, each taxed under different rules, at different points, and sometimes at different levels, the corporation and then the individual. Understanding the mechanism, well before a deal is on the table, is what lets a seller and their accountant plan around it instead of reacting to it after a purchase agreement is already signed.

Share sale: a capital gain to the individual seller

When an owner sells shares of the corporation that runs the business directly to a buyer, the gain is realized personally, as a capital gain, taxed under the same general capital gains rules that apply to selling any other capital property. Depending on whether the shares meet specific conditions under Canadian tax law, some or all of that gain may qualify for the lifetime capital gains exemption, which can shelter a portion of the gain from tax entirely — but only where the corporation and the shares meet tests the CRA sets out, tested over a period of time, not automatically for every private company sale.

Asset sale: taxed inside the corporation first

When the corporation sells its assets instead of the owner selling shares, the gain or income from that sale is realized inside the corporation, not by the individual owner directly. Different assets are taxed differently at this stage — capital property sold above its tax cost creates a capital gain, while depreciable property sold for more than its remaining tax value can trigger recaptured depreciation taxed as income, and goodwill has its own treatment again. Only once the corporation has paid whatever tax applies does the owner extract the remaining proceeds, as a dividend, a capital dividend where available, or by winding up the company, and that extraction step is its own tax event, layered on top of the corporate-level tax already paid.

Why structure changes the after-tax result so much

Because a share sale is taxed once, personally, with a potential exemption available, while an asset sale is generally taxed twice, once inside the corporation and then again when proceeds are extracted, the two structures can produce meaningfully different after-tax outcomes for the same headline price. That’s a large part of why sellers generally prefer a share sale and buyers often prefer an asset sale, and why the choice of structure is negotiated as part of the deal itself, sometimes with the price adjusted to reflect which side is bearing which tax outcome.

GST/HST and other taxes that ride alongside

Income tax isn’t the only tax question in a business sale. Sales tax — GST or HST, depending on the province — generally applies to a sale of business assets unless a specific election is available and properly filed, while a share sale is typically treated differently for sales tax purposes. There are separate mechanics again for a corporation’s own outstanding tax liabilities, which a buyer’s advisors will want confirmed as clear before closing, regardless of how the deal is structured.

Why this needs planning before a deal, not during one

Some of the tools that improve a seller’s after-tax outcome, such as reorganizing a corporation’s structure, isolating investment assets from active business assets, or arranging things so shares meet the conditions for an exemption, take real time to put in place and generally cannot be done in the weeks between accepting an offer and closing. Sellers who start this conversation with an accountant and a lawyer well before actively marketing the business have meaningfully more options than sellers who start it after an offer is already on the table.

The bottom line for a seller

Nothing here is a substitute for a specific figure run by your own accountant against your own corporation’s structure and history. What matters at this stage is understanding that the structure of the sale, share versus asset, how proceeds are extracted, whether any exemption applies, drives the after-tax result far more than the headline sale price alone, and that the decisions shaping that structure are made earliest by sellers who plan ahead rather than by sellers reacting to a buyer’s opening offer. Two sellers with an identical headline sale price can walk away with meaningfully different amounts after tax, purely because of choices made about structure and timing — which is exactly why this is a conversation to have early, not a detail to sort out at the closing table.