If you work for yourself in Ontario construction, you almost certainly need WSIB coverage. Being an independent contractor doesn't get you out of it. Most construction business owners in Ontario, with or without employees, have to be registered with the Workplace Safety and Insurance Board (WSIB) and pay premiums on their own earnings. The clearance certificate is what proves you're covered and up to date. Optional insurance is a separate thing, and it's mostly for people the mandatory rules don't catch. Get those two mixed up and you lose work.
Updated October 2026. This is a practical guide, not legal advice. WSIB rules change, so check the current position on wsib.ca before you make a decision.
Quick note on where I'm coming from. I built my maintenance company in London, not Ontario. The law is different over there. The logic isn't. The client wants to know that whoever turns up on site is covered, and if you can't prove it, you don't get the job.
Do independent contractors in Ontario need WSIB?
In construction, yes, in most cases. Ontario expanded compulsory coverage in construction years ago. Since then, independent operators, sole proprietors, partners and executive officers in construction have had to carry WSIB coverage for themselves, with a few exceptions.
Outside construction it works the other way round. If you're a business owner in most other industries, you aren't automatically covered. You can choose to buy coverage for yourself. That's optional insurance.
So the first question isn't "am I independent?" It's "am I doing construction work, and who am I doing it for?"
The exceptions people actually use
There are two you'll hear about on site. Both have conditions, so read the WSIB wording before you rely on either.
- Home renovation work. If you only do home renovation work and you're hired and paid directly by the homeowner or resident, you're exempt from mandatory coverage for yourself. If you have employees, you still have to register to cover them.
- Non-working partner or executive officer. A business can apply for an exemption for a partner or executive officer who doesn't do construction work. You have to apply for it. It doesn't happen on its own.
This is where people get caught. The home renovation exemption is narrow. According to WSIB, take on even one contract that isn't home renovation work - a job for a property manager, a builder, a commercial client - and you no longer meet the criteria. You then have to register, report your earnings and pay premiums on all of it, the home renovation earnings included, for a minimum period.
One job for a property manager and the exemption's gone. Plan for that before you say yes.
What a WSIB clearance certificate is and why everyone asks for it
A clearance certificate is a document from WSIB confirming that your account is registered and in good standing. Clearances are requested and issued through WSIB's online service.
Whoever hires you for construction work is called the principal in WSIB language. That might be a general contractor, a developer or a property manager. The principal is expected to get a clearance from you before construction work starts and to keep it current while the job runs.
Here's why they care so much. If a principal doesn't check and you owe WSIB, the principal can end up on the hook for what you owed on their job. Nobody wants to pay someone else's premiums. So the clearance check is the first thing a serious client does, and the client who doesn't ask is the one I'd worry about.
There's one big carve-out. If a homeowner, resident or a member of their family hires you directly for home repairs or renovation, they don't need a clearance from you.
How to stay "clearance ready"
This is the routine I'd run if I were working for myself in Ontario. It's the same discipline I had my own subbies follow in London. No paperwork, no start date.
- Register with WSIB if your work falls under mandatory coverage. Do it before you quote the job, not after you win it.
- Report your earnings and pay premiums on time. A clearance is only issued if your account is up to date. Late reporting is the most common reason a clearance gets refused.
- Check the validity date on every certificate you get. Clearances don't last forever. Put the renewal in your calendar before it runs out.
- Send it with your quote. Don't wait to be asked. A clearance attached to a tidy quote tells the client you've done this before.
- Keep your own subbies' clearances too. If you hire someone else for construction work, you're now the principal. Same rules, other side of the table.
That last one people forget. The moment you bring in a helper who runs their own business, their WSIB status is your problem.
Optional insurance: who it's for and when it's worth it
Optional insurance is coverage you choose to buy for yourself when the law doesn't force it on you. Independent operators, sole proprietors, partners and executive officers can apply, as long as any employees they have are already covered.
In construction, most owners don't get to choose, because coverage is mandatory. So optional insurance matters mainly in two situations:
- You're in the home renovation exemption and you want coverage for yourself anyway.
- You do trade-adjacent work outside construction, where owners aren't automatically covered.
You apply through WSIB's optional insurance request process. WSIB sets the amount of insurance based on your business earnings. Your net business income reported to CRA counts if you've been running for a year or more, and there's a set starting level if you're newer than that. I'm not going to quote premium rates here. They depend on your work classification and they change. Get the current number from WSIB.
Is it worth paying for if you're exempt?
My honest view: if you're on the tools, yes, think hard about it.
Without coverage, an injury on a home renovation job is your problem. No income, a job half done and a client chasing you. Your own body is the business. If it stops, the business stops. That's the part people hate hearing.
The second reason is commercial. If you plan to move beyond homeowner work, and most people who want to grow do, you'll need an account in good standing anyway. Better to set it up properly now than to scramble the week a property manager offers you a contract.
The exception is the person who genuinely only does small cash-and-cheque jobs for homeowners and has no plan to grow. That's a different business. But know which one you're running.
Illustrative scenario: the first commercial job
This example is made up to show how the rules play out. It isn't a real contractor.
Sam is a drywall finisher in Mississauga. For two years Sam has only worked for homeowners who hire and pay directly, so Sam has relied on the home renovation exemption and has no WSIB account.
A property management company that looks after a few low-rise buildings asks Sam to quote for patching and finishing in three vacant units. Good money, steady work.
Here's what Sam needs to understand before saying yes. That contract isn't home renovation work for a homeowner. Taking it ends the exemption. Sam has to register with WSIB, report earnings and pay premiums, including on the homeowner work, for the minimum period. And the property manager, as principal, will want a clearance before Sam starts.
The smart move is to register first, get the clearance, then send the quote with the clearance attached. Sam turns up looking like a business, not someone who'll be a compliance headache.
Where Plan@Job fits
Plan@Job is project and operations management for construction and property businesses. We call the contractor business that runs the client, the delivery, the subbies and its in-house operatives the Operator.
Inside Plan@Job, operators split jobs into internal stages with scope, dates, status and costs, and run delivery through subcontractors or their own team. The client sees the agreed scope, the price and the evidence you share. Your internal costs and your subbies' identities stay internal. The project management features show how that works.
When it comes to vetting subbies, the checks and approval sit with the operator at the right stage of the job. In some supported workflows a subcontractor can price before being fully vetted, but the decision to approve and award stays with a person. The software doesn't make that call for you, and your WSIB responsibilities stay yours.
One honest point. Plan@Job is live in the UK right now. In Canada we're running a reserve list, not a live launch, so I'm not going to tell you Canadian clients are already hiring through it. If you run a contracting business in Ontario and want in when it opens, put your name down on the Plan@Job Canada contractors page.
The verdict
If you do construction work in Ontario, act as if WSIB coverage is required until you've checked that an exemption really fits your work. Keep your account clean so a clearance is always one click away. Buy optional insurance if you're exempt but on the tools and planning to grow.
The clearance isn't paperwork for the sake of it. It's the thing that gets you through the door with clients who pay properly.
Your next move: log into WSIB, check your account is current, and get a clearance in your hands before your next quote goes out. Then reserve your spot on Plan@Job in Canada so you're set up when it goes live.
FAQ
Does a sole proprietor in Ontario construction need WSIB coverage?
In most cases, yes. Ontario's compulsory coverage in construction covers sole proprietors, independent operators, partners and executive officers, with some exceptions. The main one is home renovation work where you're hired and paid directly by the homeowner or resident. Check that your work really fits before you rely on it.
Do I need a clearance certificate for a homeowner job?
No. If a homeowner, resident or a member of their family hires you directly for home repairs or renovation, they don't need a clearance from you. Any job for a principal such as a general contractor or property manager is different. They'll expect a current clearance before you start.
Can I get optional insurance if I'm exempt from mandatory coverage?
Generally, yes. Independent operators, sole proprietors, partners and executive officers can apply for optional insurance as long as any employees they have are covered. WSIB sets the insured amount based on your business earnings, so get the current details from WSIB before you apply.