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Business Sale

Do I have to pay HST when I buy a business in Ontario?

TSL Written by the Treadstone Law Team· Updated November 6, 2026

It can be, but you may be able to avoid it with a joint election. When you buy a business's assets, GST/HST may otherwise be payable on the sale, but if you acquire all or substantially all (at least 90%) of the property needed to carry on the business, you and the seller can jointly elect on Form GST44 so that no GST/HST is payable. The buyer must be able to continue operating the business with the property acquired.

The election has limits. It cannot be used if the seller is a GST/HST registrant and the buyer is not. Even with it, GST/HST still applies to services the seller supplies, to property supplied by lease, licence or similar arrangement, and, if the buyer is not a registrant, to a taxable sale of real property. Form GST44 must be filed on or before the day your GST/HST return is due for the first reporting period in which GST/HST would otherwise have been payable.

Buying the shares of a corporation is generally not subject to GST/HST. If you think the deadline has been missed, speak to an accountant or lawyer promptly, because the outcome depends on the facts.

Key takeaways

  • Buying business assets can attract GST/HST, but buying the shares of a corporation is generally not subject to it.
  • If you acquire at least 90% of the property needed to carry on the business, you and the seller can jointly elect on Form GST44 so that no GST/HST is payable.
  • The election cannot be used if the seller is a registrant and the buyer is not, and GST/HST still applies to some items such as the seller's services and property supplied by lease or licence.
  • Form GST44 is due by the day your GST/HST return is due for the first period in which tax would otherwise have been payable, and it can be filed through My Business Account.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone business lawyer can help.

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Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

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