Ontario’s Workplace Safety and Insurance Act, 1997 section 146 makes the buyer of a business liable for the seller’s unpaid WSIB amounts by operation of statute — no knowledge, no assumption of the debt, no diligence defence. A WSIB purchase certificate waives it. Whether the buyer also inherits the seller’s claims experience is a separate question with a different test.
Key takeaways
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Part XII, marginal note Obligations of successor employers. Subsection (1) sets the trigger: “This section applies when an employer sells, leases, transfers or otherwise disposes of all or part of the employer’s business either directly or indirectly to another person”.
Read the operative words. Or part of: a division counts. Leases: you need not own anything. Indirectly: an interposed entity does not break the chain. On unpaid premiums, a share purchase leaves the debt inside the corporation you buy; s.146 follows the assets instead.
Then subsection (2), in full: “The person is liable to pay all amounts owing under this Act by the employer immediately before the disposition.” No fault element, no threshold, no relief for a buyer who asked and was told nothing was owing. The only carve-outs are in subsection (1) — a trustee in bankruptcy, a receiver, a liquidator, a CCAA acquirer — which is why a receivership purchase differs.
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Subsection (3): “The Board may enforce the obligation against the person as if the person had been the employer at all relevant times.” That sentence hands the WSIB a default certificate filed with the Superior Court under s.139 and, under s.145, a first lien after municipal taxes on property used in the industry — property that, after closing, is the buyer’s.
One constraint runs the other way: s.148(1) makes the Board publish policies governing when the s.146 power is used, and subsection (2) adds that “The Board shall be bound by the policies in its administration of those sections.”
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Across the consolidated Act on e-Laws — 63,249 words — the string “clearance” appears zero times. The certificate the market names is the Board’s, not the legislature’s.
Its home is contractor liability. Section 141(10), marginal note Certificates, lets the Board certify that a contractor “has complied with the contractor’s or subcontractor’s obligations to make payments under the insurance plan”; s.141.2 makes it mandatory in construction.
Policy 14-02-04 agrees. It issues a clearance “to relieve a principal of liability for payment obligations to the WSIB that a contractor or sub-contractor may incur”, names its authority as section 141, and says one “is valid for up to 90 calendar days, depending on the date that it is issued, and is renewable.” Neither text mentions buying a business.
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Policy 14-02-03 answers to s.146: “Upon request, the WSIB issues a purchase certificate that waives a purchaser’s liability with respect to disposal by an original employer whose account is in good standing.” Without one the Board charges the purchaser with amounts relating to the business acquired, pro-rated on a partial sale.
Two operating rules matter more than the concept. “The certificate is valid for 30 days from the date of issue as printed on the certificate” — so a closing that slips outside it is uncovered. And the buying-or-selling page adds: “You need to make the request for the purchase certificate from us before the date of sale.”
Where a seller runs several accounts each needs its own certificate, and none of it releases the seller: the request mechanics.
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Income Tax Act s. 159(2), marginal note Certificate before distribution, obliges a legal representative to get one before distributing property: distributing the proceeds without a clearance certificate. Section 116, marginal note Disposition by non-resident person of certain property, instead shields the purchaser from withholding: the certificate a non-resident seller needs.
The WSIB purchase certificate is the third — provincial, applied for by the parties to the sale, expiring in 30 days. One says nothing about the other two.
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It waives a known exposure at a moment in time; it is not a warranty. Its least-known limit is procedural: “The WSIB will not action any requests for a purchase certificate while the original employer’s account has an issue under appeal.” A seller with a live premium dispute cannot deliver one — and that refusal is itself a finding.
It also assumes there is an account to clear: a seller who never registered leaves nothing to certify, though s.75(1) obliged it to register within 10 days. And it is silent on the rate — nothing in 14-02-03 touches classification or claims history, which the buyer’s checklist treats separately.
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Ontario has not run an experience-rating program since 2020. NEER, CAD-7 and MAP gave way to a prospective model in which claims experience sets the rate itself rather than producing a later rebate or surcharge — so what a buyer takes on is a price per dollar of payroll, not a bill.
Under policy 14-02-01 the Board sets a class rate, then “a risk adjusted premium rate for each employer based, in part, on how their risk and claims experience compares with the collective experience of their class”. It runs over a six-year review period and scales individual experience by an actuarial predictability grouping. Bands sit five per cent apart and an employer moves at most three a year, against a 2026 average of “$1.23 per $100 of insurable payroll” — so a rate is durable.
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The default for a new registrant is generous. Under 14-02-01 an employer with coverage for under 11 months in the review period is a new employer, and the rate explainer puts it plainly: “For new businesses with less than one year of experience, your premium rate will be the class rate.”
A transfer of experience overrides that, and the Board has published its test. Policy 14-01-06: “If an employer closes and then re-opens a business within a 12-month period, the WSIB will transfer the insurable earnings and claims experience to the re-opened employer”, whatever the new name or account number. It adds that “the transfer of experience may be applicable to employers who purchase a business and open a new account with the WSIB.”
Two conditions must both hold. Connection: “Connection can be confirmed if the owner(s), group of persons, or the corporate entities have a majority ownership in both the previous business and the new business”, or, on a minority stake, where that person exercises significant owner duties in both. Continuity: the buyer must substantially retain any two from the Board’s list — employees, clients, suppliers, management, equipment, safety programs.
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Six scenarios sit beside that policy. In the arm’s length example, retiring owners sell a pet store’s assets to unrelated buyers who keep every employee, supplier and the location. The conclusion: “154235 Canada Inc. are considered an arm’s length employer so the connection criteria is not met” — total continuity, no transfer.
Scenario one is the mirror image, and an actual sale. A grandfather sells his hardware store to a grandson holding a 40 per cent stake and approval rights; the grandson renames it, moves it, keeps 75 per cent of staff and the clients — and the experience transfers. The deals likeliest to inherit a bad claims record are management buyouts, family successions and buy-ins, not third-party sales.
Three structures need no test. On a share sale “the company keeps the same account”, so history, rate and debt stay put — see claims history after a purchase. On an amalgamation the closures policy builds one rate from combined experience, and a change of legal entity triggers an account review.
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The two exposures behave differently. The s.146 amount is a fixed historic number, discoverable, extinguished by a certificate or by paying it at closing. The rating is a multi-year price. On parameters of my own choosing rather than data — a $4 million payroll, a $2.00 class rate, three bands above class at five per cent a band — 15.8 per cent more is near $12,600 a year, recurring: experience rating on an asset purchase.
The appeal routes differ. An objection runs to the Board within six months under s.120(1)(b). Section 123(2) excludes Part XII from the Appeals Tribunal “other than decisions concerning whether security must be given under section 137 or whether a person is liable under subsection 146 (2) to make payments” — successor liability is appealable by design, while decisions under subsections 83(1) and (2), the rate-setting method, are not: who carries a WSIB appeal.
Both sides carry reporting duties: s.77 requires an employer to “notify the Board of a material change in circumstances” within 10 days, and policy 22-01-01 lists disposition of all or part of a business as one — the registration policy then has the buyer arrive as a new employer. All of this is Ontario; every other province runs its own statute, and this page describes none.
No. Section 146(2) is unconditional — the buyer is liable for all amounts the seller owed immediately before the disposition, with no knowledge requirement and no diligence defence available, even where the buyer asked and was told nothing was owing.
No. The Workplace Safety and Insurance Act never uses the term clearance certificate — that instrument is for contractors and is valid 90 days. A business purchase instead needs a purchase certificate, valid only 30 days, requested before the sale closes.
Not necessarily. The WSIB’s own arm’s-length example shows a buyer who kept all staff, suppliers and the location still failed the connection test because the buyer was unrelated to the seller — experience transfer generally needs both connection and continuity.
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