Buying or selling your business

Selling your business includes the sale of assets or shares.

Asset sale

If you're selling or purchasing a business’ assets, you should get a purchase certificate. We need to be informed if the seller will not continue operating after the sale to determine their reporting and payment obligations with us.

A valid WSIB purchase certificate (PDF) verifies that the company selling, leasing or transferring all or part of a business (including major assets) has WSIB coverage and there are no outstanding debts on the account. We may hold the purchaser liable for all amounts owed by the vendor up to the date of sale if you do not get a valid purchase certificate.

You need to make the request for the purchase certificate from us before the date of sale. You'll need to provide the following information:

  • WSIB account number
  • requestor’s information (including vendor’s authorization, if required)
  • vendor information
  • purchaser information
  • date of sale transaction
  • type of sales transaction (share or asset)
  • list of assets
  • value of assets (if partial sale)
  • copy of the purchase agreement
  • whether the vendor will continue to operate

The purchase certificate worksheet (PDF) and the purchase certificates policy can help you with the process. A purchase certificate is valid for 30 days from the date of issue printed on the certificate. If the transaction does not take place during the certificate’s validity period, you may request another certificate.

Please submit the completed purchase certificate worksheet and other account-related documents online or by emailing

Next steps

We'll send the purchase certificate to the requestor once completed. Please note, you still need to send a closure request to us once the sale is completed to advise of the last date employees were employed by the seller.

Learn more about closing your account.

Share sale

If you’re selling shares, a new legal entity isn’t created, so a purchase certificate isn’t required. However, you’ll need to submit the Share Purchase Agreement online or by emailing

You’ll also need to notify us if there is a change in the business’ name by submitting the Articles of Amendment (if applicable) or any updates to your address(es).

Next steps

We'll make the required updates on the account. Please note we won't send written confirmation.