Workers' compensation coverage is one of the few compliance obligations that follows a contractor onto every single site, on every job, in every province — and it is also one of the easiest obligations to let slide until an inspector, an insurer, or an injured worker forces the question. In Canada, workers' compensation is administered provincially rather than nationally, which means the rules, the paperwork, and even the name of the board change the moment a job crosses a provincial line. This guide lays out what WCB and WorkSafe compliance actually involves for a contractor hiring subs and running crews, in practical terms. It is not legal, insurance, or tax advice — confirm your specific obligations with your provincial board and your insurance broker, since requirements differ by province and can change. As of this writing, confirm the current rules directly with your board before relying on anything below.
There is no single WCB — only provincial boards
Every Canadian province and territory runs its own workers' compensation system, and the name changes with the border: WorkSafeBC in British Columbia, the Workers' Compensation Board in Alberta, the Workplace Safety and Insurance Board (WSIB) in Ontario, the Workers' Compensation Board of Saskatchewan, the Workers Compensation Board of Manitoba, WorkSafeNB in New Brunswick, WorkplaceNL in Newfoundland and Labrador, the Workers Compensation Board of Prince Edward Island, and the Workers' Compensation Board of Nova Scotia.
A contractor who works in one province can treat this as background noise. A contractor who takes jobs across provincial lines cannot — registration, assessment rates, and even which trades are covered can differ from one board to the next, and a clearance from one province generally has no standing with another. Confirm the registration and clearance requirements for every province you actually work in, not just the one you are based in, and do not assume a rule that applies in one applies the same way in the next.
Why a sub's coverage becomes your problem
As a general contractor, you are not automatically insulated from a subcontractor's compliance gap just because they run a separate business. If a sub you hired turns out to be uninsured when a worker is injured on your site, the exposure can land on you — both financially, through an assessment, and practically, through the project simply stopping while the question gets sorted out.
This is why most boards let you check a subcontractor's clearance status before you let them on site, and why experienced general contractors treat that check as a standard step in onboarding a trade, not an optional extra. Confirm the current clearance process with your own provincial board directly, since portals and requirements have been known to change, and a check done for a different province will not satisfy the one you are actually working in.
What a clearance certificate actually confirms
A clearance certificate, sometimes called a clearance letter, is a board's confirmation that a business is registered, in good standing, and has no outstanding account balance as of the date it was issued. It does not confirm anything about the quality or safety of the work, and it is only current as of the date on it — a sub cleared in January is not necessarily cleared in July, on a job that runs that long.
- Confirm the sub is registered with the correct board before the first day on site, not after work has started
- Re-check clearance periodically on longer jobs, not only once at the start
- Keep a dated record of every clearance you checked, in case the question is ever raised later
- Treat a clearance certificate as a point-in-time snapshot rather than a permanent status
Owner-operators and independent contractors
Whether a sole proprietor or a company's own owner needs personal WCB coverage is one of the most inconsistent rules across the country — in some provinces, personal coverage for an owner-operator is optional; in others, it can be mandatory depending on the trade or the type of work being performed. A related, separate question some boards look at closely is whether a worker who should have been on payroll was instead treated as an independent sub to avoid that obligation. Do not assume the answer that applies in one province applies in the next one you take work in — confirm it directly with the relevant board, since this is exactly the kind of detail that is cheap to get right up front and expensive to unwind later.
Building a compliance system instead of relying on memory
Clearance certificates and insurance documents expire on their own schedule, independent of your project schedule, and they have an uncanny habit of lapsing in the middle of a job rather than between jobs. The contractors who get caught out are almost never the ones who did not know the rule — they are the ones tracking it across email threads and a folder of PDFs instead of a system that actually surfaces the gap before it matters.
- Keep every subcontractor's clearance and insurance documents attached to their record, not scattered across inboxes and desktops
- Check expiry dates before scheduling a sub onto a new phase, not only when they were first hired
- Record who checked what and when, so you could reconstruct the compliance picture if a dispute or an audit ever asked for it
- Treat compliance checks as part of onboarding every new sub, with the same seriousness as price and schedule
A short pre-mobilization checklist
Before a new sub's crew sets foot on your site, it is worth running through a short list rather than trusting memory. None of this replaces advice from your own board or broker — it is close to the minimum most experienced general contractors apply as routine.
- Confirm the sub is registered with the correct provincial board for the trade and the province the job is in
- Pull a current clearance certificate and record the date you checked it
- Confirm liability insurance is active and names the coverage you actually expect
- Note the renewal or expiry date somewhere you will genuinely see it again, not just in an inbox
- Repeat the check at the start of any phase long enough to cross an expiry date
How BuildersBridge helps
BuildersBridge will not tell you which board a specific sub should be registered with, or whether an owner-operator in your province needs personal coverage — that depends on your province and your situation, and it belongs with your board and your insurance broker. What it does is give you a place to put the answer once you have it: every supplier and subcontractor record stores insurance and WCB expiry dates and flags coverage that has lapsed, so a sub whose clearance expired three weeks ago does not quietly end up back on your schedule.
For contractors working across provinces, the same record follows the sub regardless of which job they are currently working, which matters if your crews and trades move between provinces over a season. The directory sits alongside the purchase orders you issue to the same subs, so compliance and committed cost live in one place rather than two. Combined with the province-correct tax handling already applied to Canadian jobs on the platform, and the rest of the job and crew records it keeps, the goal is the same either way: the compliance picture should be a page you can check in a minute, not a question you hope nobody ever asks.