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Reviewing Employee Obligations When Buying an Ontario Business

See which employee liabilities can pass to you when you buy an Ontario business, how asset and share purchases differ, and what to verify before closing.

Buying & Selling a Business4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • In an asset purchase where you keep employees, their seller service counts toward your later termination and severance obligations, with no pro rata split.
  • In a share purchase the corporation stays the employer and keeps its employment obligations.
  • WSIB and collective agreement exposure can also pass to a buyer, so verify both before closing.

When you buy a business, you also take on a workplace. Staff, their pay history and their rights can affect your costs for years after closing.

This article explains how Ontario's rules generally treat employees in asset and share purchases, and what you should verify before you commit.

Asset purchase or share purchase

The structure matters most. Under the Employment Standards Act, 2000, if a business is sold and the buyer employs the seller's employee, the employment is deemed not to have been terminated or severed. The employee's service with the seller counts toward later entitlements with the buyer.

A share sale works differently. Selling a company's shares does not itself create a new employment relationship, so section 9 does not apply. The corporation remains the employer and keeps its employment obligations.

IssueAsset purchaseShare purchase
Who is the employerThe buyer, for staff it employsThe same corporation
Past serviceCounts with the buyerContinues with the corporation
WSIB purchase certificateAvailable in many casesNot issued where no assets are disposed of

Termination and severance after an asset purchase

If you keep the employees in an asset purchase, you alone are responsible for later termination and severance obligations under Part XV, based on service with both the seller and you. There is no pro rata split with the seller. That is why the price and any holdback should reflect each employee's length of service.

Employees can always reject your offer of employment, and refusing does not take away their termination notice, pay in lieu or severance pay from the seller. If you hire someone more than 13 weeks after their last day with the seller or the day of the sale, whichever is earlier, prior service does not carry over.

Some situations are special: businesses taken over by a landlord for unpaid rent, businesses taken over by a trustee or receiver, and franchise operations. The Ministry says to confirm how continuity applies with the Employment Standards Information Centre at 1-800-531-5551.

WSIB and union obligations

A person who acquires all or part of an employer's business is liable for all amounts the employer owed under the Workplace Safety and Insurance Act, 1997 immediately before the disposition. A WSIB purchase certificate waives WSIB's right to hold you liable for amounts owing up to the date of disposal. It is valid for 30 days from issue, the sale must close within that time, and the seller's account must be in good standing. A separate certificate is needed for each account. The seller or buyer can request it, but the seller must authorize release of its account information.

If you buy only part of a business, you are liable only for amounts relating to the part you acquired. You must describe the assets and prove their value relative to the whole, or WSIB will estimate a pro-rated amount.

If the seller is bound by a collective agreement, you are bound by it as if you had been a party, until the Ontario Labour Relations Board declares otherwise, and the law counts leases and transfers as a sale. Building services is a sector with different treatment. Contested successor cases go to the Board, so get advice.

What to verify before closing

Compare the records against what the seller tells you. Gaps in documents are a reason to ask for a larger holdback or an indemnity, both of which are negotiated terms.

What to do next

Frequently asked questions

Do I have to keep the seller's employees?

How this applies depends on your deal, so it is worth confirming with a lawyer. Employees can always reject a buyer's offer of employment, and refusing does not take away their termination notice, pay in lieu or severance pay from the seller. If you do employ them, their seller service counts toward later entitlements.

Does the seller share the severance cost later?

In an asset purchase where you keep employees, you alone are responsible for later termination and severance obligations, with no pro rata split with the seller. Your agreement can still address price or indemnities.

Does the successor employer rule apply to a share purchase?

Section 9 does not apply to a share purchase, because the corporation remains the employer and keeps its obligations.

How long is a WSIB purchase certificate valid?

It is valid for 30 days from issue, and the sale must close within that time. WSIB does not issue one for share purchases where no assets are disposed of.

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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