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Buying a Business in Ontario: What Buyers Need to Know

Learn how business purchases are structured in Ontario, the legal and tax risks to check, the documents involved and the professionals who help.

Buying & Selling a Business5 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • The structure of the deal, assets or shares, decides which risks you take on and which documents you need.
  • The Employment Standards Act, 2000 bans most employee non-competes, with a sale-of-business exception.
  • The GST/HST section 167 election is made on Form GST44 and has a filing deadline tied to your first return.
  • Most small-business purchases fall well below the Competition Act pre-merger thresholds.

If you are thinking about buying an Ontario business, you are probably weighing price, risk and how much work the seller's past will create for you. The legal side is manageable when you know what to look for.

This overview covers deal structures, the main legal and tax issues, the documents and the professionals who normally help. It is general information, not a substitute for advice on a specific deal.

Asset purchase or share purchase

In an asset purchase, you choose what you buy, such as equipment, inventory, goodwill, the business name and contracts. Anything not listed stays with the seller. In a share purchase, you buy the company, so you inherit its history, including contracts, claims and tax positions.

FeatureAsset purchaseShare purchase
What you getChosen assetsThe whole company
Past liabilitiesDepends on the deal and the law, so worth confirming with a lawyerStay inside the company you now own
Contracts and leaseOften need to be assigned with consentUsually stay in place, subject to their terms
Price allocationMatters for tax and depreciationLess central

The right structure depends on tax, risk and the seller's wishes, so it is worth discussing with a lawyer and an accountant before offers are made.

Legal risks buyers should check

Some risks are easy to miss. In an asset purchase, the WSIB says it may hold a buyer liable for all amounts the vendor owes up to the sale date if the buyer does not obtain a valid purchase certificate. The certificate must be requested before the sale date and lasts 30 days from the issue date printed on it.

Liens are another risk. Ontario's Access Now service lets you search the Personal Property Security Registration system for liens against a seller's assets.

Other points to review, depending on the deal:

Non-competes, privacy and competition law

Buyers often want the seller to stay out of the same market. The Employment Standards Act, 2000 prohibits employers from entering into employment contracts or other agreements that contain a non-compete. The ban took effect on October 25, 2021. A sale-of-business exception applies where there is a sale or lease of a business or part of one, the seller becomes the buyer's employee, and the non-compete is agreed as part of the sale. The ESA also does not prohibit non-competes with executives such as a CEO, president, CFO or COO. Whether a particular clause is allowed and enforceable is a question to confirm with a lawyer.

Privacy matters too. Federal law allows parties to a prospective transaction to use and disclose personal information without consent if an agreement limits use to the deal, requires safeguards, and requires return or destruction if the deal does not proceed. After closing, the information must be needed to carry on the business and one party must notify the individuals within a reasonable time. How this applies to your customer or employee records depends on your situation, so it is worth confirming with a lawyer.

For competition law, the 2026 pre-merger notification thresholds are a $93 million transaction-size threshold and a $400 million party-size threshold. Most small-business purchases fall well below these.

Tax points that shape the deal

On GST/HST, buyer and seller can jointly elect under section 167 so that no GST/HST is payable on the sale of a business or part of one. The buyer must acquire all or substantially all, at least 90 per cent, of the property needed to carry on the business. The election cannot be used if the seller is a registrant and the buyer is not. GST/HST can still apply to certain services, leases or licences.

The form must be filed on or before the day the buyer's GST/HST return is due for the first reporting period in which GST/HST would otherwise have been payable. The Excise Tax Act also lets the Minister allow a later date on application.

For income tax, how the price is split matters. CRA says to use the asset prices in the agreement if they are set out and reasonable, and otherwise to allocate at fair market value, then to inventory, with the remainder going to goodwill in Class 14.1. Other tax issues, including the seller's side of the deal, are best reviewed with an accountant.

Documents and professionals

A typical purchase involves a confidentiality agreement, a letter of intent, the purchase agreement, a lease assignment or new lease, closing documents, and any financing or vendor take-back paperwork. If the seller finances part of the price, remember the criminal rate of interest is an annual percentage rate above 35 per cent.

A lawyer handles agreements, searches and closing. An accountant reviews financials and tax structure. A lender, insurance broker and sometimes a business broker may also be involved.

What to do next

Frequently asked questions

Is it safer to buy assets or shares?

Neither is automatically safer. Asset deals let you choose what you take, but need more assignments and consents. Share deals are simpler on paper but bring the company's history with them. A lawyer and accountant can compare them for your situation.

Can the seller be stopped from competing with me?

The ESA bans most employment non-competes, but has an exception where the business is sold, the seller becomes the buyer's employee and the non-compete is agreed as part of the sale. Whether a specific clause works depends on the facts and is worth confirming with a lawyer.

Do I have to notify the Competition Bureau?

Whether notification applies depends on the size of the deal and the parties involved, so it is worth confirming with a lawyer. For 2026 the pre-merger thresholds are a $93 million transaction-size threshold and a $400 million party-size threshold. Most small-business purchases fall well below them.

What is the section 167 election?

It is a joint GST/HST election by buyer and seller so that no GST/HST is payable on the sale of a business or part of one. It is made on Form GST44, which can also be filed online through My Business Account or Represent a Client.

Sources

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

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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