WSIB Coverage and Registration Checker for Ontario Corporations
Hiring someone does not automatically mean you need WSIB. Coverage follows the industry rather than the payroll, and a great many professional corporations are not compulsorily covered at all. Work out which side of that line you are on before you register or ignore it.
registration
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Who Is Covered and Who Is Not
| Person | Position in Your Sector | Insurable Earnings |
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What You Have To Do, and When
| Step | Applies | Timing |
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Where This Usually Goes Wrong
| Assumption | Position |
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Points That Decide This
What to Do Next
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Disclaimer: This page is an informal indicator built from a small number of inputs and is not a determination of coverage, a classification, or advice on a particular business. Whether a business is compulsorily covered by workplace safety insurance in Ontario depends on the industry or industries it carries on, as set out in the regulations made under the Workplace Safety and Insurance Act; some industries are compulsorily covered, some are expressly excluded, and a business may carry on more than one activity with different results for each. The Workplace Safety and Insurance Board determines classification and coverage, and its determination governs rather than any indication given here; a business that is not compulsorily covered may generally apply for optional insurance, which is a separate process with its own effect. Different rules apply in construction, where compulsory coverage has been extended to independent operators, sole proprietors, partners and executive officers, subject to a limited exemption that must be applied for and that depends on the person not performing construction work; those rules are specific and must be confirmed directly. Premium rates are set by the Board by class and are revised periodically; the rate field on this page is blank for you to complete from your own notice, and no rate is suggested because a rate quoted for the wrong classification is worse than none. The maximum insurable earnings ceiling is set annually and must be confirmed. Registration requirements and timing, including the period within which a business that becomes an employer in a compulsorily covered industry must register, are set by the Board and should be confirmed; failing to register where registration was required can result in assessment of premiums for the period during which the business operated unregistered, together with interest and penalties. Engaging contractors can give rise to liability for premiums in respect of their workers in some circumstances, and clearance certificates address that; that topic is not resolved by this page. Employer health tax is a separate provincial tax with its own exemption, associated-employer rules, instalment thresholds and return, none of which is calculated here beyond a simple screening test. This page is general information, not legal, tax or accounting advice.
Coverage Follows the Industry, Not the Hire
The question owners ask is “I have employees now, do I need WSIB”. The question that actually decides it is what the business does. Some industries are compulsorily covered and some are not, and a payroll of fifty people in an excluded industry does not create compulsory coverage.
That cuts both ways. A one-person construction corporation can be compulsorily covered with no employees at all, while a professional office with a dozen staff may not be. The instinct that headcount drives the answer is the single most common error here.
Which is why the first question on this page is the sector. Everything else follows from it, and a business that carries on more than one activity can land on both sides of the line at once.
Construction Is Its Own Regime
Compulsory coverage in construction extends beyond employees to independent operators, sole proprietors, partners and executive officers. That is the opposite of the general position, where an executive officer is outside compulsory coverage.
There is a limited exemption for an officer who does not perform construction work, and it has to be applied for rather than assumed. Anyone operating a construction corporation on the basis that the owner is automatically outside coverage should check that properly, because the exposure accumulates quietly.
Not registering is not a saving. Where registration was required and did not happen, premiums can be assessed for the whole period the business operated unregistered, with interest and penalties on top. The cost does not disappear; it waits.
Optional Insurance Exists, and Is Worth Considering
A business outside compulsory coverage can generally apply for optional insurance. Owners usually dismiss this and sometimes should not.
An owner-operator with no coverage and no private disability insurance is carrying the risk of their own injury personally, and for some trades and some site requirements the question is settled commercially rather than legally: general contractors and principals frequently require a clearance certificate before they will let anyone on site, regardless of whether coverage was compulsory.
| Situation | Usual position |
|---|---|
| Construction, any structure | Compulsory, including owners |
| Trucking, manufacturing, retail, trades | Generally compulsory for workers |
| Professional office, finance, consulting | Generally not compulsory |
| Executive officer outside construction | Generally outside compulsory coverage |
| Anyone needing site access | Clearance often demanded commercially |
Subcontractors Are Where the Liability Hides
Engaging a contractor who is not covered, and who does not hold a clearance, can leave the business exposed to premiums in respect of that person’s work. A great deal of unregistered-employer exposure arrives this way rather than through payroll.
The practical control is unglamorous and effective: get a clearance before the work starts, and keep it current for the duration. It costs nothing and it is the difference between a documented position and an argument.
The Premium Rate Is Not Yours to Choose
Classification is assigned by the Board based on what the business actually does, not on what it calls itself, and the rate follows the classification. This page therefore leaves the rate field blank rather than suggesting one.
A rate quoted against the wrong classification is worse than no rate at all, because it produces a budget that is confidently wrong. Take the figure from your own notice.
Health Tax Is a Different Question Entirely
Employer health tax and workplace safety insurance get discussed together because both arrive with the first hire, and they have nothing to do with each other. One is a provincial payroll tax with an exemption threshold; the other is insurance with an industry-based coverage test.
Most small corporations sit well under the health tax exemption and owe nothing, while the coverage question is live regardless of payroll size.
The health tax has its own calculators. Our employer health tax calculator works out the exemption and the amount, and the associated employer calculator deals with sharing the exemption across a group and with instalments.
What This Checker Does Not Do
- Determine coverage, which the Board decides
- Assign your classification or quote a rate
- Resolve multi-activity businesses carrying on several industries
- Assess an optional insurance application
- Settle contractor liability, which turns on the facts
- Calculate the health tax beyond a screening test
Frequently Asked Questions
Common questions on WSIB coverage for corporations.
Related Calculators and Guides
More on employer obligations.
Settle the Coverage Question Before the First Pay Run
Tell us what the business actually does and who is on the payroll. We will work out whether coverage is compulsory, get the registration done where it is, and say plainly where it is not, which for a professional corporation is frequently the answer.